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SNOWDATA GeoTIFF Annual Snow Up Date (year)

Product Summary
Download Link SNOWDATA_GeoTIFF_snow_up_date_doy.zip link - 4 MB
Metadata Link* Metadata for SNOWDATA GeoTIFF Annual Snow Up Date (year)
Project Link SnowDATA: Snow Datasets for Arctic Terrestrial Applications
DescriptionThis dataset includes annual Snow Up Date(sudy) for northern Alaska in GeoTiff format, covering the years 1980-2012. Snow Up Date is defined as day of the start of the core snow period(day of year). The core snow season is defined to be the longest period of continuous snow cover in each year.
Date CreatedAugust 28, 2015 12:00 am
Last UpdatedNovember 2, 2015 6:12 pm
Product Disclaimer
"Day-of-year" (doy) output is expressed in Ordinal dates ("1" on 1 January, and "365" on 31 December).  Dates have not been corrected for leap years. This output is appropriate for display purposes, as it is readily interpreted as calendar day of year.  It is not recommended as input for analysis, as it may produce incorrect statistics; "day-of-simulation" (dos) files should be used for that purpose.

"Day-of-year" (doy) is converted from "day-of-simulation" (dos) by the following sequence of process steps:

if (dos <= 122) then
doy = dos + 243
else
doy = dos – 122
endif