1 Soil Moisture Assimilation in NCEP Global Forecast System Weizhong Zheng 1 , Jerry Zhan 2 , Jiarui Dong 1 , Michael Ek 1 1 Environmental Modeling Center, National Centers for Environmental Prediction (NCEP/EMC), National Weather Service, NOAA 2 National Environmental Satellite, Data and Information Service/Satellite Applications and Research (NESDIS/STAR), NOAA 3rd COSMOS Workshop, 10-12 December 2012 University of Arizona, Tucson, Arizona, USA
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Soil Moisture Assimilation in NCEP Global Forecast System
Weizhong Zheng 1 , Jerry Zhan 2 , Jiarui Dong 1 , Michael Ek 1 1 Environmental Modeling Center , National Centers for Environmental Prediction ( NCEP/EMC), National Weather Service, NOAA - PowerPoint PPT Presentation
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Soil Moisture Assimilation in NCEP Global Forecast System
Weizhong Zheng1, Jerry Zhan2, Jiarui Dong1, Michael Ek1
1Environmental Modeling Center, National Centers for Environmental Prediction (NCEP/EMC), National
Weather Service, NOAA2National Environmental Satellite, Data and Information
Service/Satellite Applications and Research (NESDIS/STAR), NOAA
3rd COSMOS Workshop, 10-12 December 2012University of Arizona, Tucson, Arizona, USA
2
NOAA Center for Weather and Climate Prediction (NCWCP), College Park, Maryland
The simplified ensemble Kalman Filter (EnKF) was embedded
in the NCEP GFS to assimilate satellite soil moisture observation.
Future plan: Test assimilation of COSMOS soil moisture measurements.
Data assimilation via the NASA Land Information System (LIS)
Other in situ soil moisture data sets/networks, e.g. Soil Climate Analysis Network (SCAN; www.wcc.nrcs.usda.gov/scan), and others identified by the International Soil Moisture Network (www.ipf.tuwien.ac.at/insitu).
KEY REQUIREMENT FOR NWP OPERATIONS: RELIABLE, NEAR-REALTIME
Soil Moisture Data assimilation in NCEP GFS
Method: A Simple Ensemble Kalman Filter (EnKF) embedded in latest version of GFS latest version
Assimilation time period: 00Z May 1 – June 18, 2012. (GFS/GSI)
Experiments: CTL: Control run EnKF: Sensitivity run Perturbations:
Precipitation, 4 layer soil moisture states
Testing with SMOS Soil Moisture
GFS_CTL
EnKF-CTL GFS_EnKF
SMOS
Comparison of soil moisture 18Z, 1-17 June 2012
GFS Top Layer SM Validation With USDA-SCAN Measurements