MODIS__Arctic__MeltPondFraction__UHAM-CliSAP-ICDC__v01__12.5km__8day

Reflectances measured in the visible frequency range at three channels of the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Earth Observation Satellite (EOS) TERRA were used to derive the melt pond fraction on Arctic sea ice using an artificial neural network. This analysis was done on reflectances gridded onto a polar-stereographic grid tangent to the Earths' surface at 70 deg N with 500 m grid resolution. The reflectances used originate from the 8-day composite reflectances provided via https://wist.echo.nasa.gov/api/ as product: "MODIS surface Reflectance 8-Day L3 Global 500m SIN Grid V005". After gridding and flagging for clouds and other disturbances the artificial neural network was applied, providing fractions of three surface classes: 1) melt ponds, 2) sea ice and snow, and 3) open water at 500 m grid resolution. This data has been interpolated onto a similar polar-stereographic grid but with 12.5 km grid resolution.

The data set offered here comprises several data layers: the melt pond fraction, its standard deviation, the open water fraction, and the number of individual valid grid cells with 500 m grid resolution included in each 12.5 km grid cell. In addition, in three separate data layers melt pond fraction, its standard deviation, and the open water fraction are given only for those grid cells (with 12.5 km grid resolution) where more than 90 % of the native 500 m grid resolution data indicate clear sky conditions. Grid cells with an open water fraction larger than 85 % have been generally flagged as invalid. The data set is updated annually.

INSPIRE

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File identifier
de.dkrz.wdcc.iso2444135 XML
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Series
Online resource
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None
Metadata language
English
Encoding
Format

netCDF.tar
Version

tarball of network Common Data Format files
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Coupled resource

Coupled resource
 
 

Classification of data and services

Coupled resource

Coupled resource
 
 

Keywords

Other keywords

Theme

  • ocean
Theme

  • arctic
Theme

  • EOS-TERRA
 
 

Geographic coverage

N
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W
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Temporal reference

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Date (Creation)
2013-01-07
 

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Conformity
 

Conformity

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Conformity
 

Responsible organization (s)

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Organisation name

University of Hamburg (IfM)
Organisation name

University of Hamburg / KlimaCampus
Organisation name

University of Hamburg / KlimaCampus
Organisation name

University of Hamburg / KlimaCampus
 

Responsible organization (s)

Contact for the resource
Organisation name

University of Hamburg (IfM)
Organisation name

University of Hamburg / KlimaCampus
Organisation name

University of Hamburg / KlimaCampus
Organisation name

University of Hamburg / KlimaCampus
 

Metadata information

Contact for the metadata
Organisation name

University of Hamburg (IfM)
Organisation name

University of Hamburg / KlimaCampus
Organisation name

University of Hamburg / KlimaCampus
Organisation name

University of Hamburg / KlimaCampus
Organisation name

University of Hamburg (IfM)
Organisation name

University of Hamburg / KlimaCampus
Date stamp
2022-04-25T05:17:51
 
 

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Conformance class 1: invocable

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Conformance class 2: interoperable

Access constraints

Limitation
 

Use constraints

Limitation
 

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Spatial extent

N
S
E
W
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Keywords

EOS-TERRA arctic ocean

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