---
access_dt: ~
aliases:
  - context: dataset
    lexicon: nsidc
    term: oai:nsidc/NSIDC-0105
    url: http://nsidc.org/api/dataset/2/oai?verb=GetRecord&metadataPrefix=dif&identifier=oai:nsidc/NSIDC-0105
attributes: ~
cite_metadata: ~
cited_by: []
contributors:
  - display_name: 'Data Archive : National Snow & Ice Data Center Distributed Active Archive Center '
    href: http://52.38.26.42:8080/contributor/4440.yaml
    id: 4440
    organization:
      country_code: US
      display_name: National Snow & Ice Data Center Distributed Active Archive Center
      identifier: national-snow-ice-data-center-distributed-active-archive-center
      name: National Snow & Ice Data Center Distributed Active Archive Center
      organization_type_identifier: federal
      type: organization
      url: http://nsidc.org/daac
    organization_uri: /organization/national-snow-ice-data-center-distributed-active-archive-center
    person: {}
    person_id: ~
    person_uri: ~
    role_type_identifier: data_archive
    uri: /contributor/4440
data_qualifier: ~
description: 'This data set includes yearly snow melt onset dates over Arctic sea ice derived from brightness temperatures from the Scanning Multichannel Microwave Radiometer (SMMR), the Special Sensor Microwave/Imager (SSM/I), and the Special Sensor Microwave Imager/Sounder (SSMIS). The introduction of liquid water to snow results in a sharp increase in the emissivity and hence brightness temperature of the snowpack. Snow melt onset is defined as the point in time when microwave brightness temperatures increase sharply due to the presence of liquid water in the snowpack. Data span the years 1979 through 2012 and are in a polar stereographic grid at 25 km resolution. Flat binary, 1-byte integer files and GIF images are accessible via FTP. Several value-added products are also available. Value-added data sets include the following for each pixel: mean melt onset date; latest (maximum) melt onset date; earliest (minimum) melt onset date; range of melt onset dates (the difference between maximum and minimum -- an index of variability); and standard deviation of melt onset date (another index of variability). Graphical representations of value-added data are also available.'
description_attribution: ~
display_name: Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I-SSMIS Brightness Temperatures
doi: 10.5067/22NFZL42RMUO
end_time: 2012-12-31T00:00:00
files: []
href: http://52.38.26.42:8080/dataset/nasa-nsidcdaac-0105.yaml
identifier: nasa-nsidcdaac-0105
instrument_measurements:
  - dataset_identifier: nasa-nsidcdaac-0105
    display_name: defense-meteorological-satellite-program-f-11/special-sensor-microwave-imager/nasa-nsidcdaac-0105
    instrument_identifier: special-sensor-microwave-imager
    platform_identifier: defense-meteorological-satellite-program-f-11
    type: instrument_measurement
  - dataset_identifier: nasa-nsidcdaac-0105
    display_name: defense-meteorological-satellite-program-f-13/special-sensor-microwave-imager/nasa-nsidcdaac-0105
    instrument_identifier: special-sensor-microwave-imager
    platform_identifier: defense-meteorological-satellite-program-f-13
    type: instrument_measurement
  - dataset_identifier: nasa-nsidcdaac-0105
    display_name: defense-meteorological-satellite-program-f-8/special-sensor-microwave-imager/nasa-nsidcdaac-0105
    instrument_identifier: special-sensor-microwave-imager
    platform_identifier: defense-meteorological-satellite-program-f-8
    type: instrument_measurement
  - dataset_identifier: nasa-nsidcdaac-0105
    display_name: defense-meteorological-satellite-program-f-17/special-sensor-microwave-imager-sounder/nasa-nsidcdaac-0105
    instrument_identifier: special-sensor-microwave-imager-sounder
    platform_identifier: defense-meteorological-satellite-program-f-17
    type: instrument_measurement
lat_max: 90
lat_min: 30
lon_max: 180
lon_min: -180
name: Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I-SSMIS Brightness Temperatures
native_id: NSIDC-0105
parents: []
processing_level: ~
publication_year: ~
references: []
release_dt: 2014-04-11T00:00:00
scale: ~
scope: ~
spatial_extent: ~
spatial_ref_sys: ~
spatial_res: ~
start_time: 1979-01-01T00:00:00
temporal_extent: ~
temporal_resolution: ~
type: dataset
uri: /dataset/nasa-nsidcdaac-0105
url: http://nsidc.org/data/NSIDC-0105
variables: ~
version: ~
vertical_extent: ~