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green closed folder category icon Cryospheric Processes (2)
This section includes sites such as the GLAS project, and sites that focus on ice sheet and sea ice related theoretical studies, data, and field experiments.
green closed folder category icon Hydrological Sciences (5)
This section links to sites on the mapping, monitoring and modeling of the components of the hydrological cycle (including precipitation, evapotranspiration, soil moisture, snow and ice, and runoff) over land surfaces as well as the relationships between vegetation and the atmosphere.
green closed folder category icon Ocean Color (2)
This section includes sites such as SeaWiFS project, SIMBIOS project, Ocean Color part of MODIS project, and other ocean color related studies.
green closed folder category icon Physical Oceanography (4)
This section links to sites that focus on using both models and data to study many aspects of ocean circulation in the context of earth systems dynamics, e.g. El Nino is investigated through a coupled ocean-atmosphere-land-sea-ice model.
 

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    blue right-pointing arrow Land Data Assimilation Schemes (LDAS) - The land surface component of the hydrological cycle is fundamental to the overall functioning of the atmospheric and climate processes. Spatially and temporally variable rainfall and available energy, combined with land surface heterogeneity cause complex variations in all processes related to surface hydrology. The characterization of the spatial and temporal variability of water and energy cycles are critical to improve our understanding of land surface-atmosphere interaction and the impact of land surface processes on climate extremes. Because the accurate knowledge of these processes and their variability is important for climate predictions, most Numerical Weather Prediction (NWP) centers have incorporated land surface schemes in their models. However, errors in the NWP forcing accumulate in the surface and energy stores, leading to incorrect surface water and energy partitioning and related processes. This has motivated the NWP to impose ad hoc corrections to the land surface states to prevent this drift. A methodology under development here is to implement Land Data Assimilation schemes (LDAS), which are uncoupled models forced with observations, and are therefore not affected by NWP forcing biases.  [keywords: data assimilation, LDAS, modeling, modelling, land data assimilation scheme, land surface model, assimilating data, nasa, gsfc, goddard space flight center, assimilation] (Added: 16-Aug-1999 Hits: 970)  [Spider Link]
    blue right-pointing arrow Microwave Sensors Branch - The Microwave Sensors Branch is the primary NASA Goddard focal point for Earth Science applications aspects of microwave remote sensing. Microwave Sensors Branch personnel conceive and build prototype active and passive microwave instruments for Earth sciences research, and participate in a wide variety of Earth sciences research activities from space and from ground-based and airborne locations.  [keywords: microwave technology, sensors] (Added: 5-Sep-2001 Hits: 730)  [Spider Link]
    blue right-pointing arrow Oceans and Ice Branch - The Oceans and Ice Branch performs research whose purpose is to exploit and explain variability in remotely-sensed data, from space-based platforms, of the ocean and cryosphere. The branch concentrates on four main areas of research: physical oceanography; air-sea interaction; ocean color; and cryospheric processes.  [keywords: Code 971] (Added: 17-Jun-1999 Hits: 969)  [Spider Link]
 

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