My GeoNetwork catalogue
Gridded Melt Pond Cover Fraction on Arctic Sea Ice derived from TERRA-MODIS 8-day composite Reflectance Data
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.
- Identification
- Distribution
- Quality
- Spatial rep.
- Ref. system
- Content
- Portrayal
- Metadata
- Md. constraints
- Md. maintenance
- Schema info
Identification
Data identification
Citation
- Date (Publication)
- 2013-05-17
- Edition
-
1
- Citation identifier
- MODIS__Arctic__MPF
- Citation identifier
- doi:10.1594/WDCC/MODIS__Arctic__MPF
https://www.ifm.uni-hamburg.de/en.html
Format
- Name
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netCDF.tar
- Keywords
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EOS-TERRA
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- Keywords
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arctic
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- Keywords
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ocean
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- Use limitation
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scientific use: For scientific use only
- Language
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eng; USA
))
- Begin date
- 2000-05-08
- End date
- 2011-09-13
Distribution
Distribution
- Distribution format
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netCDF.tar
()
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netCDF.tar
()
Digital transfer options
- Transfer size
- 2486
- OnLine resource
- https://www.wdc-climate.de/ui/entry?acronym=MODIS__Arctic__MPF
Quality
Data quality
- Hierarchy level
- collection
Completeness commission
- Name of measure
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n/a
- Measure description
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None
Non quantitative attribute accuracy
- Name of measure
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n/a
- Measure description
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None
Conceptual consistency
- Name of measure
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n/a
- Measure description
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None
Content
Coverage Description
- Attribute description
- time
- Descriptor
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time [CF-Standard Name]; unit: n/a
Coverage Description
- Attribute description
- melt_pond_area_fraction_at_top_of_sea_ice_assuming_clear_sky
- Descriptor
-
melt pond area fraction at top of sea ice assuming clear sky [CF-Guidelines for construction]; unit: n/a
Coverage Description
- Attribute description
- melt_pond_area_fraction_at_top_of_sea_ice (standard_deviation)
- Descriptor
-
melt pond area fraction at top of sea ice standard_deviation [CF-Guidelines for construction]; unit: n/a
Coverage Description
- Attribute description
- land_binary_mask
- Descriptor
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X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = land, 0 = sea. [CF-Standard Name]; unit: n/a
Coverage Description
- Attribute description
- longitude
- Descriptor
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longitude [CF-Standard Name]; unit: n/a
Coverage Description
- Attribute description
- latitude
- Descriptor
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latitude [CF-Standard Name]; unit: n/a
Coverage Description
- Attribute description
- sea_area_fraction
- Descriptor
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Sea Area Fraction [CF-Standard Name]; unit: n/a
Coverage Description
- Attribute description
- number_of_valid_data_per_grid_cell
- Descriptor
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[CF-Guidelines for construction]; unit: n/a
Coverage Description
- Attribute description
- melt_pond_area_fraction_at_top_of_sea_ice_assuming_clear_sky (standard_deviation)
- Descriptor
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melt pond area fraction at top of sea ice assuming clear sky (standard_deviation) [CF-Guidelines for construction]; unit: n/a
Coverage Description
- Attribute description
- projection_x_coordinate
- Descriptor
-
"x" indicates a vector component along the grid x-axis, when this is not true longitude, positive with increasing x. Projection coordinates are distances in the x- and y-directions on a plane onto which the surface of the Earth has been projected according to a map projection. The relationship between the projection coordinates and latitude and longitude is described by the grid_mapping. [CF-Standard Name]; unit: n/a
Coverage Description
- Attribute description
- projection_y_coordinate
- Descriptor
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"y" indicates a vector component along the grid y-axis, when this is not true latitude, positive with increasing y. Projection coordinates are distances in the x- and y-directions on a plane onto which the surface of the Earth has been projected according to a map projection. The relationship between the projection coordinates and latitude and longitude is described by the grid_mapping. [CF-Standard Name]; unit: n/a
Coverage Description
- Attribute description
- melt_pond_area_fraction_at_top_of_sea_ice
- Descriptor
-
melt pond area fraction at top of sea ice [CF-Guidelines for construction]; unit: n/a
Coverage Description
- Attribute description
- sea_area_fraction_assuming_clear_sky
- Descriptor
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sea_area_fraction_assuming_clear_sky [CF-Guidelines for construction]; unit: n/a
Metadata
Metadata
- File identifier
- wdc-climate.de:2444135 XML
- Metadata language
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eng; USA
- Hierarchy level
- collection
- Hierarchy level name
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MODIS__Arctic__MPF
- Date stamp
- 2013-01-07T16:42:31
- Metadata standard name
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ISO 19115
- Metadata standard version
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ISO 19115-2:2009
Overviews
Spatial extent
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