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Development of Global Soil Moisture Product System (SMOPS)

Research Topic: Data Fusion and Algorithm Development
Task Leader: Christopher Hain
CICS Scientist: Christopher Hain
Sponsor: NESDIS STAR
Published Date: 7/25/2014
SMOP_2-2

FY13 REPORT

BACKGROUND

Soil moisture status controls the sensible and latent heat exchanges between the land surface and atmosphere. These heat exchanges are among the major energy sources for atmospheric motions. Thus, reliable soil moisture data products and techniques for assimilating them into numerical weather prediction models are believed to have significant impacts for weather forecast accuracy. The Advanced Microwave Scanning Radiometer on JAXA’s GCOM-W1 satellite (AMSR2) was launched on May 18, 2012. A global soil moisture environmental data record (EDR) will be generated by NOAA. NESDIS has built a Global Soil Moisture Operational Product System (SMOPS) to merge satellite retrieval data products of soil moisture from AMSR-E on NASA Aqua, WindSat of Navy NRL, ASCAT on MetOp satellite and the Soil Moisture and Ocean Salinity (SMOS) mission of European Space Agency (ESA). With the launches of MetOp-B and GCOM-W1 satellite, new soil moisture data from ASCAT and AMSR2 are becoming available. The L2 soil moisture data from SMOS has a latency of more than 12 hours. To reduce its latency and to merge the new satellite observations of soil moisture, NESDIS PSDI program supports to expand SMOPS to include MetOp-B ASCAT, AMSR2 and faster SMOS data. Details of the FY13 SMOPS project are as follows.

ACCOMPLISHMENTS

Global daily soil moisture retrievals from MetOp-B Advanced Scatterometer (ASCAT) is found to be similar to and slightly wetter than the soil moisture retrievals from MetOp-A ASCAT (See Figs. 1 and 2 below). Both MetOp-A and MetOp-B satellite fly the same polar orbit with a 10:30am/pm equator crossing time. The similarity of the two satellite sensor products will increase the reliability of the soil moisture products blended by SMOPS.

SMOP_1-1

SMOP_1-2

SMOP_1-3

Figure 1: An example of daily Soil Moisture maps from ASCAT-MetOpA and ASCAT-MetOpB. The top map shows the difference between ASCAT-MetOpA Soil Moisture and ASCAT-MetOpB Soil Moisture on Dec 13, 2013. The middle map shows ASCAT-MetOpA Soil Moisture on Dec 13, 2013. The bottom map shows ASCAT-MetOpB Soil Moisture on Dec 13, 2013.

SMOP_2-1
SMOP_2-2

Figure 2: The density plot between Metop-A and Metop-B soil moisture on Dec 13, 2013.

PLANNED WORK

  • Work with OSPO to deliver the updated SMOPS code to OSPO.
  • Work with OSPO on testing the new SMOPS system.
  • Finish up all the related documents.

PUBLICATIONS

Not yet completed.

DELIVERABLES

Plan to deliver SMOPS code to OPSO in late summer of 2014.

PRESENTATIONS

Not yet done.

 

PERFORMANCE METRICS

   

# of new or improved products developed following NOAA guidance

1

# of products or techniques transitioned from research to ops following NOAA guidance

1

# of new or improved products developed without NOAA guidance

0

# of products or techniques transitioned from research to ops without NOAA guidance

0

# of peer reviewed papers

0

# of non-peered reviewed papers

0

# of invited presentations

0

# of graduate students supported by a CICS task

0

# of graduate students formally advised

0

# of undergraduate students mentored during the year

0

 

PERFORMANCE METRICS EXPLANATION

The graduate student visiting scholar began on the SMOPS project from Oct 2013 and is expected to complete the project by Sept 2014.

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