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Lake Ice Regime Classification

Report Generated: 2018-03-15 01:26:22 +0000

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Metadata schema: mdJson
Schema version: 2.0.0

Contacts
Melanie Engram
Contact ID: 65eb741a-1978-451a-952d-cd2edaaf6e1c
is Organization: false
Contact Type: academic
Position Name: Research Assistant
is Member of: Water and Environmental Research Center
Electronic Mail: melanie.engram@alaska.edu
Anna Liljedahl, PhD
Contact ID: 21164d06-5ad0-4a68-8327-0b38c9a3c2b1
is Organization: false
Contact Type: academic
Position Name: Assistant Professor
is Member of: Institute of Northern Engineering
Address
Water and Environmental Research Center
PO Box 755860
Fairbanks, Alaska 99775-5860
United States
Address Type: mailing
Phone
Phone Number: +1 907 4741951
Service Types: voice
Electronic Mail: akliljedahl@alaska.edu
Online Resource
URI: http://ine.uaf.edu/
Function: information
Protocol: http
National Park Service
Contact ID: c8fe56f8-2ca4-4d3b-8671-fb638672337d
is Organization: true
Contact Type: federal
Address
410 West 5th Ave.
Anchorage, Alaska 99501
United States
Address Type: physical
Phone
Phone Number: +1 907 6443510
Service Types: voice
Online Resource
URI: http://www.nps.gov/akso/index.cfm
Function: information
Protocol: http
Bureau of Land Managment
Contact ID: 8390f129-abd6-42c3-aad5-8c1ac7da6551
is Organization: true
Contact Type: federal
Christopher D. Arp, PhD
Contact ID: 3ef1791f-db18-4074-bb4b-d292a61a55d5
is Organization: false
Contact Type: academic
Position Name: Assistant Professor
is Member of: Water and Environmental Research Center
Address
P.O. Box 755860
Fairbanks, Alaska 99775-5860
United States
Address Type: mailing
Phone
Phone Number: +1 907 2238839
Service Types: voice
Electronic Mail: cdarp@alaska.edu
Online Resource
URI: http://ine.uaf.edu/werc/
Function: information
Protocol: http
Christopher Hiemstra
Contact ID: afbf5568-cc8c-4718-8e0f-26c54295ddc3
is Organization: false
Contact Type: federal
Position Name: Snow Scientist
is Member of: Cold Regions Research and Engineering Laboratory
Electronic Mail: Christopher.A.Hiemstra@erdc.dren.mil
Mark Wipfli
Contact ID: f3f4b1b4-291d-46ce-bcb9-29fff7399e53
is Organization: false
Contact Type: federal
Position Name: Aquatic Ecologist
is Member of: Alaska Cooperative Fish and Wildlife Research Unit
Online Resource
URI: http://www.akcfwru.uaf.edu/about.php
Function: information
Protocol: http
William Morris
Contact ID: 3f9fee29-10e4-4d49-bcc3-9fb6476eaa85
is Organization: false
Contact Type: state
Position Name: Fisheries Biologist
is Member of: Alaska Department of Fish and Game
Jeff Adams
Contact ID: dbef9e78-6fd9-4fd9-9ef0-648500186082
is Organization: false
Contact Type: federal
Position Name: Fisheries Biologist
is Member of: Fairbanks Field Office
Institute of Northern Engineering
Contact ID: edee0498-008e-4f88-8256-8c578951288c
is Organization: true
Contact Type: academic
is Member of: University of Alaska, Fairbanks
Address
539 Duckering Building
306 Tanana Loop
Fairbanks, Alaska 99775-5910
United States
Address Type: physical
Online Resource
URI: http://ine.uaf.edu/
Function: information
Protocol: http
University of Alaska, Fairbanks
Contact ID: c2f06fd5-3ea4-4319-b393-b741cfe3b746
is Organization: true
Contact Type: academic
Electronic Mail: uaf-ogca@alaska.edu
Arctic Field Office
Contact ID: 9170c4bf-9031-49c9-822a-f88fb77e2961
is Organization: true
Contact Type: federal
is Member of: Bureau of Land Managment
Address
1150 University Avenue
Fairbanks, Alaska 99709
United States
Address Type: physical
Vladimir Alexeev
Contact ID: 01498154-d1b4-493d-822f-44959f83af26
is Organization: false
Contact Type: academic
Position Name: Climatologist
is Member of: International Arctic Research Center
Online Resource
URI: http://www.iarc.uaf.edu/
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Protocol: http
Debora Nigro
Contact ID: 03ca3dc8-4970-458a-9cf9-b0654475a6cb
is Organization: false
Contact Type: federal
Position Name: Wildlife Biologist
is Member of: Arctic Field Office
Phone
Phone Number: +1 907 474 x2324
Service Types: voice
Electronic Mail: dnigro@blm.gov
Colorado State University
Contact ID: 8f70bcfb-b05b-4dd0-900d-f0043614a59d
is Organization: true
Contact Type: academic
Address
2002 Campus Delivery, 408 Univ Services Center
Fort Collins, Colorado 80523
United States
Address Type: physical
Phone
Phone Number: +1 970 4912083
Service Types: voice
Electronic Mail: jennifer.strange@colostate.edu
Online Resource
URI: http://www.colostate.edu/
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Johnette Shockley
Contact ID: 2e4c3ca1-ca62-47b2-a206-90e8983b69b9
is Organization: false
Contact Type: federal
Position Name: Financial Officer
is Member of: Cold Regions Research and Engineering Laboratory
Address
72 Lyme Road
Hanover, New Hampshire 03755-1290
United States
Address Type: mailing
Phone
Phone Number: +1 402 5544979
Service Types: voice
Electronic Mail: johnette.shockley@us.army.mil
Wendy Loya
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Contact Type: lcc
Position Name: LCC Coordinator
is Member of: Arctic Landscape Conservation Cooperative
Phone
Phone Number: +1 907 786 x3532
Service Types: voice
Electronic Mail: wendy_loya@fws.gov
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Frank Urban
Contact ID: fdaef361-fffd-4ed8-87e9-8c9de2173c38
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Contact Type: federal
Position Name: Geologist
is Member of: U.S. Geological Survey
Electronic Mail: furban@usgs.gov
Landscape Conservation Cooperative Network
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Contact Type: lcc
Address
Science Applications, USFWS
5275 Leesburg Pike
Falls Church, VA 22041
USA
Address Type: mailing
Address Type: physical
Phone
Phone Name: Elsa Haubold
Phone Number: 7033581953
Service Types: voice
Phone
Phone Name: Jillian Cohen
Phone Number: 7033581764
Service Types: voice
Electronic Mail: elsa_haubold@fws.gov
Electronic Mail: jillian_cohen@fws.gov
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Position Name: LCC Network Data Manager
is Member of: Landscape Conservation Cooperative Network
Electronic Mail: lccdatasteward@fws.gov
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
is Organization: true
Contact Type: lcc
Address
U.S. Fish & Wildlife Service
1011 E. Tudor Rd
Anchorage, Alaska 99503
United States
Address Type: mailing
Phone
Phone Number: +1 907 7863532
Service Types: voice
Electronic Mail: staff@arcticlcc.org
Online Resource
URI: http://arcticlcc.org
Function: information
Protocol: http
Alaska Cooperative Fish and Wildlife Research Unit
Contact ID: c7d5a839-b20a-4385-a595-f91b0543084b
is Organization: true
Contact Type: federal
is Member of: U.S. Geological Survey
Address
209 Irving I
902 Koyukuk Ave
Fairbanks, Alaska 99775-7020
United States
Address Type: physical
Phone
Phone Number: +1 907 4747661
Service Types: voice
Online Resource
URI: http://www.akcfwru.uaf.edu/about.php
Function: information
Protocol: http
Matthew Whitman
Contact ID: 96e4cc3d-fc44-4b55-805e-8a9e1a35a94d
is Organization: false
Contact Type: federal
Position Name: Fisheries Biologist
is Member of: Arctic Field Office
Phone
Phone Number: +1 907 4742249
Service Types: voice
Electronic Mail: mwhitman@blm.gov
Fisheries and Ecological Services
Contact ID: a5cb0ef3-6a0d-4982-81d3-6fcc67a619b7
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Fairbanks Field Office
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U.S. Geological Survey
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Milt Sawyers
Contact ID: d2af944c-c30c-49f5-894c-11eeed9a1ae9
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Contact Type: academic
Address
University of Alaska Fairbanks, Office of Grants & Contracts Administration
P. O. Box 757880
Fairbanks, Alaska 99775-7880
United States
Address Type: physical
Phone
Phone Number: +1 907 4747301
Service Types: voice
Electronic Mail: mlsawyers@alaska.edu
Office of Grants and Contracts Administration
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Contact Type: academic
is Member of: University of Alaska, Fairbanks
Address
PO Box 757880
Fairbanks, Alaska 99775-7880
United States
Address Type: mailing
Electronic Mail: uaf-ogca@alaska.edu
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U.S. Army Corps of Engineers
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Alaska Department of Fish and Game
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Contact Type: state
Benjamin M. Jones
Contact ID: cc17cdeb-5b90-4dfb-85d5-facdbdd46030
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Contact Type: federal
Position Name: Cartographer
is Member of: Alaska Science Center
Phone
Phone Number: +1 907 7867033
Service Types: voice
Electronic Mail: bjones@usgs.gov
Glen Liston, PhD
Contact ID: cced5183-4181-44d7-9738-f2de34cd0d93
is Organization: false
Contact Type: academic
Position Name: Senior Scientist
is Member of: Colorado State University
Address
Cooperative Institute for Research in the Atmosphere (CIRA)
1375 Campus Delivery, 014 Cira
Fort Collins, Colorado 80523
United States
Address Type: physical
Phone
Phone Number: +1 970 4918220
Service Types: voice
Electronic Mail: glen.liston@colostate.edu
Online Resource
URI: http://www.colostate.edu/
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Ronald Daanen
Contact ID: d4537a7a-28bc-4e42-8d0c-bf6ae5a0470b
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Contact Type: academic
Position Name: Hydrologist
is Member of: Water and Environmental Research Center
Online Resource
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U.S. Fish and Wildlife Service
Contact ID: 7361053d-d29f-4bf1-8d61-9245ca85eaed
is Organization: true
Contact Type: federal
Ben Gaglioti
Contact ID: 9df46651-38b5-421d-8393-d6a59df52d1c
is Organization: false
Contact Type: academic
Position Name: Paleoecologist
is Member of: Water and Environmental Research Center
Online Resource
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International Arctic Research Center
Contact ID: 49922047-b4ea-44e2-9971-daadf0e162cf
is Organization: true
Contact Type: academic
is Member of: University of Alaska, Fairbanks
Address
930 Koyukuk Drive
Fairbanks, Alaska 99775-7340
United States
Address Type: physical
Online Resource
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Rosemary Madnick
Contact ID: e918b882-7836-46cf-a676-6a67231d74cd
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Contact Type: academic
Position Name: Director
is Member of: Office of Grants and Contracts Administration
Address
Office of Grants and Contracts Administration, University of Alaska Fairbanks
909 Koyukuk Drive, 008 WRRB
Fairbanks, Alaska 99775-7880
United States
Address Type: physical
Phone
Phone Number: +1 907 4747301
Service Types: voice
Electronic Mail: UAF-OGCA@alaska.edu
Online Resource
URI: http://www.uaf.edu/grcon/
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Water and Environmental Research Center
Contact ID: f60d22f3-4c71-4605-8fea-a00d86118dba
is Organization: true
Contact Type: academic
is Member of: University of Alaska, Fairbanks
Address
Duckering Building 437
306 Tanana Loop
Fairbanks, Alaska 99775-5860
United States
Address Type: physical
Phone
Phone Number: +1 907 2238839
Service Types: voice
Electronic Mail: cdarp@alaska.edu
Online Resource
URI: http://ine.uaf.edu/werc/
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Alaska Science Center
Contact ID: 3bfe3689-386c-4b05-a388-fc289fff8ba5
is Organization: true
Contact Type: federal
is Member of: U.S. Geological Survey
Address
4210 University Dr.
Anchorage, Alaska 99508
United States
Address Type: physical
Cold Regions Research and Engineering Laboratory
Contact ID: aff0fdab-db8f-45f7-a1f4-3e79c65b6e70
is Organization: true
Contact Type: federal
is Member of: U.S. Army Corps of Engineers

Metadata Information
Metadata Status: completed
Metadata Identifier
Identifier: 0aa65e03-3643-40d3-8e0c-2559738d0a36
Namespace: urn:uuid
Parent Metadata
Title: FishCAFE: Response of an Arctic Freshwater Ecosystem to Climate and Land-use Change
Date: creation: 2013-05-01
administrator
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
Collaborator
Anna Liljedahl, PhD
Contact ID: 21164d06-5ad0-4a68-8327-0b38c9a3c2b1
Contact Type: academic
Position Name: Assistant Professor
Matthew Whitman
Contact ID: 96e4cc3d-fc44-4b55-805e-8a9e1a35a94d
Contact Type: federal
Position Name: Fisheries Biologist
Benjamin M. Jones
Contact ID: cc17cdeb-5b90-4dfb-85d5-facdbdd46030
Contact Type: federal
Position Name: Cartographer
Debora Nigro
Contact ID: 03ca3dc8-4970-458a-9cf9-b0654475a6cb
Contact Type: federal
Position Name: Wildlife Biologist
William Morris
Contact ID: 3f9fee29-10e4-4d49-bcc3-9fb6476eaa85
Contact Type: state
Position Name: Fisheries Biologist
Jeff Adams
Contact ID: dbef9e78-6fd9-4fd9-9ef0-648500186082
Contact Type: federal
Position Name: Fisheries Biologist
Ronald Daanen
Contact ID: d4537a7a-28bc-4e42-8d0c-bf6ae5a0470b
Contact Type: academic
Position Name: Hydrologist
Glen Liston, PhD
Contact ID: cced5183-4181-44d7-9738-f2de34cd0d93
Contact Type: academic
Position Name: Senior Scientist
Vladimir Alexeev
Contact ID: 01498154-d1b4-493d-822f-44959f83af26
Contact Type: academic
Position Name: Climatologist
Christopher Hiemstra
Contact ID: afbf5568-cc8c-4718-8e0f-26c54295ddc3
Contact Type: federal
Position Name: Snow Scientist
Ben Gaglioti
Contact ID: 9df46651-38b5-421d-8393-d6a59df52d1c
Contact Type: academic
Position Name: Paleoecologist
Frank Urban
Contact ID: fdaef361-fffd-4ed8-87e9-8c9de2173c38
Contact Type: federal
Position Name: Geologist
Mark Wipfli
Contact ID: f3f4b1b4-291d-46ce-bcb9-29fff7399e53
Contact Type: federal
Position Name: Aquatic Ecologist
Funding
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
Fisheries and Ecological Services
Contact ID: a5cb0ef3-6a0d-4982-81d3-6fcc67a619b7
Contact Type: federal
Arctic Field Office
Contact ID: 9170c4bf-9031-49c9-822a-f88fb77e2961
Contact Type: federal
National Park Service
Contact ID: c8fe56f8-2ca4-4d3b-8671-fb638672337d
Contact Type: federal
Principal Investigator
Christopher D. Arp, PhD
Contact ID: 3ef1791f-db18-4074-bb4b-d292a61a55d5
Contact Type: academic
Position Name: Assistant Professor
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Authority
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Date: creation: 2013-05-01
originator
Arctic Landscape Conservation Cooperative
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Authority
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originator
Arctic Landscape Conservation Cooperative
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Description: Web page with detailed information about the resource.
Function: information
Protocol: http
Metadata Locales
Default Locale
Language Code: eng
Country Code: USA
Character Encoding: UTF-8
Metadata Contacts
publisher
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
pointOfContact
LCC Network Data Steward
Contact ID: edc6b779-3352-4a81-8430-76bcce1bfcb3
Contact Type: lcc
Position Name: LCC Network Data Manager
author
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
Metadata Dates
Date: creation: 2018-02-27T15:02:28-09:00
Date: lastUpdate: 2018-02-27T15:02:28-09:00
Metadata Online Resource
Online Resource
URI: http://metadata.arcticlcc.org/0aa65e03-3643-40d3-8e0c-2559738d0a36
Metadata Maintenance
Frequency: asNeeded
Maintenance Contacts
author
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
Note: Metadata records are generated from database

Resource Information
Resource Type: dataset
Status: completed
Citation
Title: Lake Ice Regime Classification
Date: lastUpdate: 2017-11-17
administrator
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
originator
Melanie Engram
Contact ID: 65eb741a-1978-451a-952d-cd2edaaf6e1c
Contact Type: academic
Position Name: Research Assistant
Identifier
Identifier: 0aa65e03-3643-40d3-8e0c-2559738d0a36
Namespace: urn:uuid
Authority
Title: Arctic Landscape Conservation Cooperative
originator
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
Online Resource
URI: http://arcticlcc.org/products/0aa65e03-3643-40d3-8e0c-2559738d0a36
Name: Resource website
Description: Web page with detailed information about the resource.
Function: information
Protocol: http
Abstract
Short Abstract:
SAR-based lake ice regime classification in seven lake-rich regions of Alaska.

Full Abstract:
These data are the result of a geospatial analysis involving multi-year SAR-based lake ice regime classification using sigma-naught backscatter intensity from calibrated space-borne C-band SAR for thousands of lakes in 7 lake districts in Alaska, USA, detailed in Engram et al., (in review). Historically, radar backscatter from space-borne and airborne platforms shows a lower backscatter return from bedfast lake ice and a higher backscatter return from floating ice (where liquid phase water exists under the ice) (Jeffries, Morris, Weeks, & Wakabayashi, 1994; Weeks, 1977). We used a threshold method where the threshold to differentiate floating and bedfast ice regimes was determined for each year from the frequency distribution of SAR backscatter intensity from lake ice.
Purpose, Usage, and Limitations
Purpose:
Geographic locations of this study were chosen to represent a variety of lake types that occur in continuous permafrost in Alaska and include five lake regions in the Arctic Coastal Plain of northern Alaska (Barrow, Teshekpuk, Inigok, Fish Creek, and Kuparuk), one region in the North one on the northern Seward Peninsula. Field data from multiple lakes in each region, including maximum ice thickness, water depth, water salinity, and frozen or unfrozen sediments were made between 2007-2016 for Barrow, Teskekpuk, Fish Creek, Inigok, Umiat, and northern Seward Peninsula.
Graphic Overviews
Overview 1
Name: Map Preview
Type: png
Online Link
URI: 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Name: graphic.png
Resource Contacts
pointOfContact
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
LCC Network Data Steward
Contact ID: edc6b779-3352-4a81-8430-76bcce1bfcb3
Contact Type: lcc
Position Name: LCC Network Data Manager
publisher
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
author
Melanie Engram
Contact ID: 65eb741a-1978-451a-952d-cd2edaaf6e1c
Contact Type: academic
Position Name: Research Assistant
Temporal Information
Time Period
Start Datetime: 1992-01-01
End Datetime: 2011-12-31
Description:
Time span for which resource(dataset) is relevant.
Spatial Information
Spatial Representation Type: vector
Spatial Reference System
Reference System Type: projected
System Identifier
Identifier: 3338
Namespace: urn:ogc:def:crs:EPSG
Spatial, Temporal, and Vertical Extents
Extent
Geographic Extent
Geographic Extent Encompasses Data: true
Map
Elements
Feature: 13a93f31-c45f-433d-b958-b18ff4aa5167
ID: 13a93f31-c45f-433d-b958-b18ff4aa5167
Polygon
Coordinates
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Computed Bounding Box
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North Latitude: 71.34381369089012
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Keywords
isoTopicCategory
  • environment
  • imageryBaseMapsEarthCover
  • inlandWaters
Thesaurus
Title: ISO 19115 Topic Category
Date: revision: 2014-04
Edition: ISO 19115-1:2014
Identifier
Identifier: ISO 19115 Topic Category
Online Resource
URI: https://doi.org/10.18123/D6RP4M
theme
  • EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > PERMAFROST
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE > PERMAFROST
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS
  • EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > RIVER ICE
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE > RIVER ICE
  • EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS
  • EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > LAKE ICE
  • EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE > LAKE ICE
Thesaurus
Title: Global Change Master Directory (GCMD) Science Keywords
Date: revision: 2016-08-10
Edition: Version 8.4
Identifier
Identifier: 1eb0ea0a-312c-4d74-8d42-6f1ad758f999
Online Resource
URI: https://earthdata.nasa.gov/gcmd-forum
Constraints
Use Constraint
Constraint Type: use
Limitation:
While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, the Arctic Landscape Conservation Cooperative cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. The Arctic Landscape Conservation Cooperative makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Resource Locales
Default Locale
Language Code: eng
Country Code: USA
Character Encoding: UTF-8
Supplemental Information
Supplemental Information:
Areas of interest: Geographic locations of this study were chosen to represent a variety of lake types that occur in continuous permafrost in Alaska and include five lake regions in the Arctic Coastal Plain of northern Alaska (Barrow, Teshekpuk, Inigok, Fish Creek, and Kuparuk), one region in the North Slope Foothills (Umiat), and one on the northern Seward Peninsula. Field data from multiple lakes in each region, including maximum ice thickness, water depth, water salinity, and frozen or unfrozen sediments were made between 2007-2016 for Barrow, Teskekpuk, Fish Creek, Inigok, Umiat, and northern Seward Peninsula.

Resource Lineage
Lineage
Statement:
SAR Processing methods: For ERS-1/2 and RADARSAT-1 data, calibrated SAR data were processed to sigma-nought terrain-corrected geotif files using MapReady software (v3.1.24) and elevation data from the IfSAR DTM derived from data acquired in 2012. For Envisat, RADARSAT-2 and Sentinel data, SAR data were calibrated, terrain corrected (using the GETASSE30 dataset), and projected to geotiff files using the SNAP software suite from ESA. We applied a Lee Sigma speckle filter in ERDAS Imagine (v2014) and manually refined the geolocation using a lateral translation and mosaicked SAR scenes where necessary in ERSI ArcMap software (v10.3). We used the lake perimeters for lakes in the Barrow, Teshekpuk, Fish Creek, and Inigok regions that were derived from IfSAR data (Jones and Grosse, 2013), and available in shapefile format. Lake perimeters were similarly derived lake perimeters from IfSAR data for northern Seward Peninsula, Umiat, and the Kuparuk regions following the methods of Jones and Grosse (2013). Determining SAR threshold to classify bedfast ice and floating ice: We used a threshold method where pixels with higher backscatter intensity than an empirically determined threshold were classified as floating ice (FI), those with a lower backscatter intensity were classified as bedfast ice (BI). First, lake pixels were selected across a landscape using a lake perimeter/land mask. Frequency distributions of the log-transformed data (decibels) were distinctly bimodal, displaying the combined distributions of lower intensity bedfast ice and the higher intensity backscatter from floating ice. Means for each ice class (BI and FI) and the threshold to separate the two classes were determined from the frequency distributions of backscatter intensity from lake ice for each scene, using a no-bias error script in Matlab (vR2014a). Resulting means and standard deviations of each ice class and the threshold value to delineate the two ice classes were manually checked against the frequency distributions of SAR intensity values of the lake ice pixels for each year. In the case of mosaicked scenes, cases were processed for each scene and for the combined mosaic, then the threshold that best fit the combined histogram was selected. In geographic areas of lower lake density, we used a subset of the landscape that exhibited high lake density since using high lake density as input to the threshold algorithm provided the best-fit means and threshold values for the entire scene. For the two years 1998 and 1999 in the northern Seward Peninsula, the threshold algorithm failed to produce reasonable BI/FI means and thresholds, so we interpolated means and threshold for these years from the means and thresholds previous and following full scenes (years1996 and 2000). Determining area of BI ice and number of lakes with each regime: Calculation of the percentage of BI and FI ice and the classification of each lake was performed in ArcMap, using standard geoprocessing that we automated with Python scripting. We calculated the percentage of ice per lake that was BI and was FI, then summed the BI area from all lakes to derive a regional BI percentage for that year. We then classified each lake as BI if it had less than 5% FI pixels. We classified a lake as FI if it had greater than 5% FI pixels and fulfilled the additional criterion of having 0.5% of pixel values higher than the FI mean. Classification was manually checked and refined in ERSI ArcMap (v10.3). All data analysis was performed at the University of Alaska Fairbanks (UAF), Institute of Northern Engineering, Water and Environmental research center by Melanie Engram in 2015-2017. Matlab code to determine the equal-error threshold was written by Olaniyi Ajadi at the Geophysical Institute at UAF.
Data Source
Description:
SAR scene selection: For the years 1992-2011, we chose C-band SAR scenes with single polarization that was transmitted and received in a vertical orientation (VV) from European Remote Sensing satellites ERS-1 and ERS-2. In the case when ERS-1/2 data were not available, we used RADARSAT-1 standard beam to fill the gaps. Data were provided by the Alaska Satellite Facility at the University of Alaska Fairbanks. For the years 2011-2012 we used Envisat data, for 2013-2014 we used RADARSAT-2 data, and for 2015-2016 we used Sentinel data. Scenes were selected to capture ice thickness maxima but before the onset of spring melt to avoid dampening the SAR signal from the presence of water on the ice surface.

Resource Distribution
Distribution
Distributor
Contact
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
Transfer Option
Online Option
URI: http://www.arcticlcc.org/products/0aa65e03-3643-40d3-8e0c-2559738d0a36
Distribution Format Option
GeoPackage
Title: GeoPackage
Online Resource
URI: http://www.geopackage.org/
Amendment Number: 1.0.2

Associated Resources
Resource
Resource Type: project
Association type: parentProject
Initiative type: project
Resource citation
Title: FishCAFE: Response of an Arctic Freshwater Ecosystem to Climate and Land-use Change
Date: creation: 2013-05-01
administrator
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
Collaborator
Anna Liljedahl, PhD
Contact ID: 21164d06-5ad0-4a68-8327-0b38c9a3c2b1
Contact Type: academic
Position Name: Assistant Professor
Matthew Whitman
Contact ID: 96e4cc3d-fc44-4b55-805e-8a9e1a35a94d
Contact Type: federal
Position Name: Fisheries Biologist
Benjamin M. Jones
Contact ID: cc17cdeb-5b90-4dfb-85d5-facdbdd46030
Contact Type: federal
Position Name: Cartographer
Debora Nigro
Contact ID: 03ca3dc8-4970-458a-9cf9-b0654475a6cb
Contact Type: federal
Position Name: Wildlife Biologist
William Morris
Contact ID: 3f9fee29-10e4-4d49-bcc3-9fb6476eaa85
Contact Type: state
Position Name: Fisheries Biologist
Jeff Adams
Contact ID: dbef9e78-6fd9-4fd9-9ef0-648500186082
Contact Type: federal
Position Name: Fisheries Biologist
Ronald Daanen
Contact ID: d4537a7a-28bc-4e42-8d0c-bf6ae5a0470b
Contact Type: academic
Position Name: Hydrologist
Glen Liston, PhD
Contact ID: cced5183-4181-44d7-9738-f2de34cd0d93
Contact Type: academic
Position Name: Senior Scientist
Vladimir Alexeev
Contact ID: 01498154-d1b4-493d-822f-44959f83af26
Contact Type: academic
Position Name: Climatologist
Christopher Hiemstra
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Ben Gaglioti
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Frank Urban
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Contact Type: federal
Position Name: Geologist
Mark Wipfli
Contact ID: f3f4b1b4-291d-46ce-bcb9-29fff7399e53
Contact Type: federal
Position Name: Aquatic Ecologist
Funding
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
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Fisheries and Ecological Services
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Arctic Field Office
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National Park Service
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Principal Investigator
Christopher D. Arp, PhD
Contact ID: 3ef1791f-db18-4074-bb4b-d292a61a55d5
Contact Type: academic
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Identifier
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Title: Metadata for project: FishCAFE: Response of an Arctic Freshwater Ecosystem to Climate and Land-use Change
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Arctic Landscape Conservation Cooperative
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Resource citation
Title: Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate
Date: publication: 2016-06-16
administrator
Arctic Landscape Conservation Cooperative
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Christopher D. Arp, PhD
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Title: Metadata for publication: Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate
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Title: A synthesis of thermokarst lake water balance in high-latitude regions of North America from isotope tracers
Date: publication: 2016-11-23
administrator
Arctic Landscape Conservation Cooperative
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Christopher D. Arp, PhD
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Title: Metadata for publication: A synthesis of thermokarst lake water balance in high-latitude regions of North America from isotope tracers
Date: lastUpdate: 2018-02-22T02:00:42-09:00
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Arctic Landscape Conservation Cooperative
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Resource citation
Title: Seasonal cues of Arctic grayling movement in a small Arctic stream: the importance of surface water connectivity
Date: publication: 2015-09-26
administrator
Arctic Landscape Conservation Cooperative
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Title: Metadata for publication: Seasonal cues of Arctic grayling movement in a small Arctic stream: the importance of surface water connectivity
Date: lastUpdate: 2018-02-25T00:50:18-09:00
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Arctic Landscape Conservation Cooperative
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Resource citation
Title: Arctic sea ice decline contributes to thinning lake ice trend in northern Alaska
Date: publication: 2016-07-18
administrator
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
Contact Type: lcc
principalInvestigator
Vladimir Alexeev
Contact ID: 01498154-d1b4-493d-822f-44959f83af26
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Arctic Landscape Conservation Cooperative
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Metadata citation
Title: Metadata for publication: Arctic sea ice decline contributes to thinning lake ice trend in northern Alaska
Date: lastUpdate: 2018-02-25T00:57:41-09:00
custodian
Arctic Landscape Conservation Cooperative
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Arctic Landscape Conservation Cooperative
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Title: Depth, ice thickness, and ice-out timing cause divergent hydrologic responses among Arctic lakes
Date: publication: 2015-11-11
administrator
Arctic Landscape Conservation Cooperative
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principalInvestigator
Christopher D. Arp, PhD
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Arctic Landscape Conservation Cooperative
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Title: Metadata for publication: Depth, ice thickness, and ice-out timing cause divergent hydrologic responses among Arctic lakes
Date: lastUpdate: 2018-02-25T01:13:49-09:00
custodian
Arctic Landscape Conservation Cooperative
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Title: Fish CAFE Project Information, prepared for Subsistence Advisory Panel (SAP) Meeting November 8th – 9th, 2016 Nuiqsut, Alaska
Date: released: 2016-11-08
administrator
Arctic Landscape Conservation Cooperative
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principalInvestigator
Christopher D. Arp, PhD
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Title: Metadata for factSheet: Fish CAFE Project Information, prepared for Subsistence Advisory Panel (SAP) Meeting November 8th – 9th, 2016 Nuiqsut, Alaska
Date: lastUpdate: 2018-02-22T02:40:30-09:00
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Title: A lake-centric geospatial database to guide research and inform management decisions in an Arctic watershed in northern Alaska...
Date: publication: 2017-03-17
administrator
Arctic Landscape Conservation Cooperative
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principalInvestigator
Benjamin M. Jones
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Title: Metadata for publication: A lake-centric geospatial database to guide research and inform management decisions in an Arctic watershed in northern Alaska...
Date: lastUpdate: 2018-02-22T02:49:43-09:00
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Arctic Landscape Conservation Cooperative
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Resource citation
Title: Distribution and biophysical processes of beaded streams in Arctic permafrost landscapes
Date: publication: 2015-01-06
administrator
Arctic Landscape Conservation Cooperative
Contact ID: cb9f1127-a62d-48a2-9591-d452b2e713b6
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principalInvestigator
Christopher D. Arp, PhD
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Title: Metadata for publication: Distribution and biophysical processes of beaded streams in Arctic permafrost landscapes
Date: lastUpdate: 2018-02-22T02:55:40-09:00
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Arctic Landscape Conservation Cooperative
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Data Dictionaries
Dictionary
Subject: dataset
Domains
Lake Class
Domain Type: ENUMERATED
ID: e085c9c8-cff4-415a-8b0d-99e318aab8b7
Code: Lake Class
Description:
Terms describe lake ice regime classification.
BI
Name: BI
Value: BI
Definition:
lake is classified as having a bedfast ice regime for 90% or more of the years analyzed
FI
Name: FI
Value: FI
Definition:
lake is classified as having a floating ice regime for 90% or more of the years analyzed
INT
Name: INT
Value: INT
Definition:
lake is classified as FI less than 90% of the years analyzed and BI less than 90% of the years analyzed, yet shows no statistically significant trend from one regime to the other, merely oscillating between floating and bedfast
TRANS-FI
Name: TRANS-FI
Value: TRANS-FI
Definition:
lake is considered to be transitioning from bedfast to floating ice during the analysis time frame. Specifically, the lake must be classified as FI less than 90% of the years analyzed and BI less than 90% of the years analyzed. In addition to these two conditions, the lake must also show a statistically significant trend (p < 0.05, least squares regression) from bedfast to floating ice.
TRANS-BI
Name: TRANS-BI
Value: TRANS-BI
Definition:
lake is considered to be transitioning from floating to bedfast ice during the analysis time frame. Specifically, the lake must be classified as FI less than 90% of the years analyzed and BI less than 90% of the years analyzed. In addition to these two conditions, the lake must also show a statistically significant trend (p < 0.05, least squares regression) from floating to bedfast ice.
Entities
Table
ID: f8db8915-e341-472e-88e3-bd26cd05663f
Code: Table
Definition:
This entity definition describes the structure for each table corresponding to the Lake Ice Regime Classification regions: Barrow, Fish Creek, Inigok, Kaparuk, NSP, Teshekpuk, Umiat.
Attribute: OBJECTID
Code: OBJECTID
Definition:
The default id for the vector feature
Datatype: INTEGER
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: Shape
Code: Shape
Definition:
Describes the feature as a point, line, or polygon
Datatype: MULTIPOLYGON
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: BRW_wacpID
Code: BRW_wacpID
Definition:
This field is the lake ID from the Western Arctic Coastal Plain (Jones and Grosse 2013) dataset, if the region was covered by that dataset. Otherwise the region ID is a unique lake ID for that region.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: Area_sq_km
Code: Area_sq_km
Definition:
This field is copied from the Western Arctic Coastal Plain (Jones and Grosse 2013) lake shapefile dataset and is the area of a lake polygon derived from the IfSAR data in square kilometers.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: Lake_hgt_m
Code: Lake_hgt_m
Definition:
This field is copied from the Western Arctic Coastal Plain (Jones and Grosse 2013) lake shapefile dataset and is the minimum digital surface model elevation value for a given polygon. This field is not present in the Umiat, and Kuparuk regions.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: Regimeyyyy
Code: Regimeyyyy
Definition:
Where yyyy is the year of analysis. (In the case of 2015, where there were two scenes used, the month and day are indicated in the following format: Regyymmmdd, where yy are the last two digits of the year, mmm is the month, and dd is the day of SAR scene acquisition.) This field contains the ice regime for that lake for that year with 1=floating ice and 0=bedfast ice.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: prctBFI_yy
Code: prctBFI_yy
Definition:
Where yy is the last two digits of the year of analysis. This field contains the percent of lake pixels that have an intensity value lower than the threshold established for that scene.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: PctHiFI_yy
Code: PctHiFI_yy
Definition:
Where yy is the last two digits of the year of analysis. This field contains the percent of lake ice pixels that have an intensity value higher than the value for the mean of floating ice.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: count_FI
Code: count_FI
Definition:
This field contains the number of years that the lake was considered to have a floating ice regime.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: count_year
Code: count_year
Definition:
This field contains the number of years analyzed for each lake.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: prcntYrsFI
Code: prcntYrsFI
Definition:
This field is the quotient of count_FI and count_year. When multiplied by 100, it is the percent of years that the lake was considered to have a floating ice regime.
Datatype: DOUBLE
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Attribute: class
Code: class
Definition:
Code indicating lake ice regime classification.
Datatype: TEXT
Allow NULL Values: false
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Field Width: 254
Attribute: note
Code: note
Definition:
Contains quality control notes and lake depths from a depth database compiled from published data.
Datatype: TEXT
Allow NULL Values: true
Attribute Values Must Be Unique: false
Value is Case Sensitive: false
Field Width: 254
Citation
Title: Lake Ice Regime Classification
Date: creation: 2018-02-28T00:17:19.156+00:00
author
Melanie Engram
Contact ID: 65eb741a-1978-451a-952d-cd2edaaf6e1c
Contact Type: academic
Position Name: Research Assistant
Dictionary Included with Dataset?: true
Metadata Repositories
Repository
Repository Name: ScienceBase
Metadata Standard: mdJSON
Citation
Title: LCC Network Science Catalog