CONFERENCES >> Abstract

2007 AGU Fall Meeting, December 10-14, San Francisco, CA

NASA Hydrology Data and Information Services Center (HDISC)
Supports Global Land Data Assimilation System (GLDAS) Products

Hongliang Fang, Pat Hrubiak, Hiroko Kato, Mattew Rodell, Bill Teng, Bruce Vollmer

The Global Land Data Assimilation System (GLDAS) is generating a series of land surface state (e.g., soil moisture and surface temperature) and flux (e.g., evaporation and sensible heat flux) products simulated by four land surface models (CLM, Mosaic, Noah and VIC). These products are now accessible at the Hydrology Data and Information Services Center (HDISC), a component of NASA Goddard Earth Sciences Data and Information Services Center (GES DISC).

In addition to the basic anonymous data downloading, HDISC provides several advanced data search and downloading services, such as Mirador, OPeNDAP, and Giovanni. Mirador is a Google-based search tool that provides discovery of and access to data based on keywords. Mirador also provides users the capability to perform on-the-fly spatial and parameter subsetting and temporal aggregation of selected data. OPeNDAP (Open-source Project for a Network Data Access Protocol) enables remote OPeNDAP clients to access OPeNDAP served data regardless of local storage format. Giovanni is an online visualization and analysis tool that provides a simple way to visualize, analyze, and access vast amounts of data without having to download the data. With Giovanni, users can perform spatial and temporal subsetting and explore spatial and temporal correlation of various parameters.

Current GLDAS data hosted at HDISC include a set of 1.0 degree resolution data products, covering 1979 to the present, from the four models and a 0.25 degree data product, covering 2000 to the present, from the Noah model. The HDISC has the capability to support more hydrology data products and more advanced analysis tools. The goal is to develop HDISC as a data and services portal that supports weather and climate forecast, and water and energy cycle research.

http://disc.sci.gsfc.nasa.gov

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