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the goddard snow radiance assimilation project: an integrated snow radiance and snow physics modeling framework for snow/cold land surface modelingMicrowave-based retrievals of snow parameters from satellite observations have a long heritage and have so far been generated primarily by regression-based empirical "inversion" methods based on snapshots in time. Direct assimilation of microwave radiance into physical land surface models can be used to avoid errors associated with such retrieval/inversion methods, instead utilizing more straightforward forward models and temporal information. This approach has been used for years for atmospheric parameters by the operational weather forecasting community with great success. Recent developments in forward radiative transfer modeling, physical land surface modeling, and land data assimilation are converging to allow the assembly of an integrated framework for snow/cold lands modeling and radiance assimilation. The objective of the Goddard snow radiance assimilation project is to develop such a framework and explore its capabilities. The key elements of this framework include: a forward radiative transfer model (FRTM) for snow, a snowpack physical model, a land surface water/energy cycle model, and a data assimilation scheme. In fact, multiple models are available for each element enabling optimization to match the needs of a particular study. Together these form a modular and flexible framework for self-consistent, physically-based remote sensing and water/energy cycle studies. In this paper we will describe the elements and the integration plan. All modules will operate within the framework of the Land Information System (LIS), a land surface modeling framework with data assimilation capabilities running on a parallel-node computing cluster. Capabilities for assimilation of snow retrieval products are already under development for LIS. We will describe plans to add radiance-based assimilation capabilities. Plans for validation activities using field measurements will also be discussed.
Document ID
20070018181
Document Type
Conference Paper
Authors
Kim, E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tedesco, M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Reichle, R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Choudhury, B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Peters-Lidard C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Foster, J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hall, D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Riggs, G.
(Science Systems and Applications, Inc. Lanham, MD, United States)
Date Acquired
August 23, 2013
Publication Date
September 1, 2006
Subject Category
Meteorology and Climatology
Meeting Information
American Geophysical Union(San Francisco, CA)
Distribution Limits
Public
Copyright
Other