Product: 063502bc-15b1-410c-8502-ced03d5b3c2a

Metadata Format
Product Title
SNOWDATA GeoTIFF Annual Snow Water Equivalent Depth
Description
This dataset includes annual Snow Water Equivalent Depth(swed) for northern Alaska in GeoTiff format, covering the years 1980-2012.
Project ID
eb98b9c4-0db6-4823-b31d-6cab789740ec
Project Title
SNOWDATA: Snow Datasets for Arctic Terrestrial Applications (Alaska Arctic LCC Distributed Snow Property Datasets)
Point of Contact(s)
LCC Network Data Steward
LCC Network Data Manager
lccdatasteward@fws.gov
Arctic Landscape Conservation Cooperative
U.S. Fish & Wildlife Service
1011 E. Tudor Rd
Anchorage, Alaska 99503
V: +1 907 7863532
staff@arcticlcc.org
http://arcticlcc.org
Arctic Landscape Conservation Cooperative
U.S. Fish & Wildlife Service
1011 E. Tudor Rd
Anchorage, Alaska 99503
V: +1 907 7863532
staff@arcticlcc.org
http://arcticlcc.org
Glen Liston, PhD
Senior Scientist
Cooperative Institute for Research in the Atmosphere (CIRA)
1375 Campus Delivery, 014 Cira
Fort Collins, Colorado 80523
V: +1 970 4918220
glen.liston@colostate.edu
http://www.colostate.edu/

Product Abstract

This dataset includes Snow Water Equivalent Depth(swed) for northern Alaska in GeoTiff format, covering the years 1980-2012. Snow Water Equivalent Depth is defined as depth on 1 March(m). The dataset was generated by the Arctic LCC SNOWDATA: Snow Datasets for Arctic Terrestrial Applications project. The dataset is delivered in the ZIP archive file format. Each year is output in a separate GeoTiff file, where the year is indicated by the filename. Over the last 20 years, under a variety of NOAA, NSF, and NASA research programs, a snow-evolution modeling system has been developed that includes the MicroMet micrometeorological model, the SnowModel snow-process model, and the SnowAssim data assimilation model. These modeling tools can be thought of as physically-based mathematical descriptions that create value-added information (e.g., snow depth, snow density, snow hardness, rain-on-snow events, and snow cover duration) from basic meteorological variables (e.g., air temperature, humidity, precipitation, and wind speed and direction). The resulting products are based on a physical understanding of environmental processes and features, and their interactions with the atmosphere and surrounding land surface. SnowModel is unique in its representation of blowing snow processes; it includes SnowTran-3D, a model developed initially for Arctic Alaska applications, and arguably the most widely used snow transport model in the world. The model formulations are general enough to allow simulations over temporal domains spanning years to decades, and spatial domains spanning from small watersheds to all of Alaska. MicroMet can use atmospheric forcing ranging from individual meteorological stations, to gridded atmospheric (re)analysis products, to climate change scenario datasets. SnowAssim is able to ingest snow data ranging from ground-based snow observations to remote-sensing data. This dataset is the result of using these meteorological- and snow-evolution models to ingest appropriate datasets and produce the required outputs. A total of 528 meteorological station sites obtained from the Imiq Database (http://arcticlcc.org/imiq) provided air temperature, relative humidity, and wind speed/direction. Daily met station data were converted to hourly using various sub-models, then all hourly data were aggregated to 3-hourly for the model simulations. Precipitation inputs were obtained from the NASA 3-hourly MERRA atmospheric reanalysis data set. Snow DATA outputs are at 2 km x 2 km resolution and cover all of mainland Alaska and portions of adjacent Yukon and Northwest territories north of 61.5° N, and west of 130.2° W. Snow Tran 3-D is not implemented in this instance, because grid cell size exceeds the scale at which wind transport is expected to operate.

Purpose: Snow conditions are extremely important to a wide range of hydrologic and ecosystem components and processes, including those related to surface energy and moisture stores and fluxes, vegetation, mammals, birds, and fish. This dataset provides snow data that did not previously exist at the required spatial and temporal resolutions needed by end users, such as scientists, land managers, and policy makers.

Product Links

Product Keywords

  • ISO 19115 Topic Category (isoTopicCategory):
    • climatologyMeteorologyAtmosphere
  • Global Change Master Directory (GCMD) Science Keywords (project):
    • SNOW,
    • AIR TEMPERATURE,
    • RAIN,
    • SNOW/ICE TEMPERATURE,
    • CRYOSPHERE MODELS,
    • ALBEDO,
    • PRECIPITATION,
    • SNOW COVER,
    • SNOW MELT,
    • PRECIPITATION AMOUNT,
    • SNOW/ICE,
    • SNOW ENERGY BALANCE,
    • MODELS,
    • SNOW DENSITY,
    • SNOW WATER EQUIVALENT,
    • SNOW DEPTH,
    • GLACIER MASS BALANCE/ICE SHEET MASS BALANCE,
    • GLACIERS
  • End User Types - Landscape Conservation Cooperatives (LCC End User Type):
    • Federal resource managers,
    • Academics & scientific researchers

Associated Products

ID Title Metadata Link
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Snow Free Date (year) mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Snow Up Date (year) mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Snow Depth mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Snow Days mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Snow Up Date mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Total Melt Per Day mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Rain Precipitation mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Glacier Melt mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual First Snow Date (year) mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Snow Density mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Last Snow Date (year) mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual First Snow Date mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Total Snow Days mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Rain On Snow Event mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Average 10-M Air Temperature mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Solid Precipitation mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Total Liquid Water mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Total Precipitation mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Snow Free Date mdJSON ISO 19115-2 HTML
4c592f43-bb6d-4681-bcbe-7b97077d90f6 SNOWDATA GeoTIFF Annual Last Snow Date mdJSON ISO 19115-2 HTML