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ISLSCP II: Ancillary Parameters at 1 degree spatial resolution (1986-1995)

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2003-12-10
Download Stats: last 12 months


The International Satellite Land Surface Climatology Project, Initiative II (ISLSCP II) is a follow on project from The International Satellite Land Surface Climatology Project (ISLSCP). ISLSCP II had the lead role in addressing land-atmosphere interactions - process modelling, data retrieval algorithms, field experiment design and execution, and the development of global data sets. The ISLSCP II dataset contains comprehensive data over the 10 year period from 1986 to 1995, from the International Satellite Land Surface Climatology Project (ISLSCP).

This dataset contains:
* Land Outline Data
* Land/Water and Land/Sea Masks
* Latitude & Longitude Grid Coordinate Data

The data are mapped to consistent grids (0.5 x 0.5 degrees for topography, 1 x 1 degrees for meteorological parameters). Some data have a grid size of 0.25 x 0.25 degrees. The temporal resolution for most data sets is monthly (however a few are at finer resolution - 3 hourly). This dataset is public.

Citable as:   (2003): ISLSCP II: Ancillary Parameters at 1 degree spatial resolution (1986-1995). NCAS British Atmospheric Data Centre, date of citation.
Abbreviation: Not defined
Keywords: ISLSCP, NASA, Ancillary, Land


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data obtained over a 10 year period from 1986 to 1995, collated by the International Satellite Land Surface Climatology Project (ISLSCP) II. A copy of these data was obtained by the BADC to assist the UK research community.

Data Quality:
NASA quality controlled data
File Format:
Data are ASCII formatted

Process overview

This dataset was generated by the computation detailed below.
Title Earth Observing System (EOS) Digital Elevation Model (DEM) at 30 arcsecond (~1km)
Abstract The files in this directory were produced by the ISLSCP2 staff based on the 30 arcsecond (~1km) Earth Observing System (EOS) Digital Elevation Model (DEM) provided by Dr. Thomas Logan from NASA/Jet Propulsion Laboratory (JPL). These are global, coarse resolution (1/4, 1/2 and 1 degree spatial resolutions) binary ( 1 and 0) overlays of land/water and land/sea boundaries. The ISLSCP2 masks are based on the best available 30 arcsecond (~1km) land/water masks produced at JPL in support of the EOS AM-1 satellite platform. The JPL masks are based in turn on vector data from the World Vector Shoreline (WVS) database (Solluri and Woodson 1990) for coastlines, and the Digital Chart of the World (DCW) (Danko 1992) for inland water bodies. The WVS is based on older 1:250,000 scale Defense Mapping Agency JOG (Joint Operational Graphics) charts produced from a variety of sources. DCW is based on a photogrammetric consistent mapping at a scale of 1:1,000,000. The ISLSCP2 staff have aggregated the 1km data to spatial resolutions of 1/4, 1/2 and 1 degree, in the process generating layers with the percentage of land/water or land/sea cells within the coarse resolution cells. An arbitrary threshold of greater than or equal to 50% water was used to designate water dominated cells and to produce binary land/water or land/sea masks for the data collection.
Input Description None
Output Description None
Software Reference None
  • long_name: Albedo
  • gcmd_url:
  • gcmd_keyword: EARTH SCIENCE > Atmosphere > Atmospheric Radiation > Albedo
  • names: EARTH SCIENCE > Atmosphere > Atmospheric Radiation > Albedo,
  • long_name: Atmospheric Radiation
  • gcmd_url:
  • gcmd_keyword: Atmospheric Radiation
  • names: Atmospheric Radiation,
  • long_name: Land
  • names: Land
  • long_name: Surface Radiative Properties
  • gcmd_url:
  • gcmd_keyword: Surface Radiative Properties
  • names:, Surface Radiative Properties

Co-ordinate Variables

Temporal Range
Start time:
End time:
Geographic Extent