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Development of Global Soil Moisture Product System (SMOPS)

Research Topic: Data Fusion and Algorithm Development
Task Leader: Mitch Schull & Christopher Hain
CICS Scientist: Mitch Schull & Christopher Hain
Sponsor: NESDIS STAR
Published Date: 9/5/2017
CHCH_SMOPS_16

2017 ANNUAL REPORT

Background

SMOPS went operational in late 2012 with external soil moisture product inputs from SMOS, ASCAT-A, and WindSat. It grids all the orbital soil moisture orbits from these sensors and output a global gridded soil moisture map for each sensor at a quarter degree resolution every 6 hours. In addition to the gridded soil moisture layers, SMOPS also generates a blended soil moisture layer that merges all the available soil moisture values using a cumulative distribution function (CDF) approach. As soil moisture data became available from MetOp-B ASCAT, MetOp-B ASCAT soil moisture has been added in SMOPS V1.3 in 2015. After the successful launch of JAXA’s GCOM-W1 satellite May 18, 2012, a soil moisture environmental data record (EDR) from Advanced Microwave Scanning Radiometer (AMSR2) onboard GCOM-W1 is now being generated at NOAA. This product has also been ingested in SMOPS V2.0 in 2016. To improve the data latency of SMOS soil moisture generation, a new layer of SMOS soil moisture is now being generated inside SMOPS (V2.0).

As Soil Moisture Passive and Active (SMAP) satellite data became available in April of 2015, efforts have been made to include SMAP observations in SMOPS. In SMOPS V3.0, not only is the NASA official SMAP soil moisture layer included, but also a separate layer of SMAP soil moisture layer is generated inside SMOPS to make SMAP soil moisture data available in SMOPS 6-hour products. To take advantage of Global Precipitation Measurement (GMP) Microwave Imager (GMI)’s observation coverage around the equator, another soil moisture layer has also made available inside SMOPS V3.0.

Accomplishments

SMOPS Version 2.0 code with GCOME-W1 AMSR2 soil moisture and SMOS NRT soil moisture retrieved by SMOPS algorithm has been delivered to OSPO and has been operationally running since September, 2016.  Because of the data quality and life cycle issues, WindSat soil moisture layer has been eliminated from SMOPS Version 2.0 and will not be produced operationally once this new version goes operational.

SMOPS Version 3.0 code with NASA SMAP soil moisture and SMOPS own retrievals from NRT SMAP brightness temperature and GMI temperature has been delivered to OSPO. It is now under testing on the operational system and will go operational in the coming months. Table 1 shows the data layers for different versions of SMOPS.

Table 1. Soil Moisture data layers from different version of SMOPS.

Soil Moisture Product

SMOPS Version 1.3

SMOPS Version 2.0

SMOPS Version 3.0

SMOPS Blended

√   (1)

NOAA AMSR-E

×

×

NRT SMOS

×

√   (2)

ESA SMOS

√   (3)

EUMETSAT ASCAT-A

√   (4)

EUMETSAT ASCAT-B

√   (5)

NOAA WindSat

×

×

NOAA AMSR2

×

√   (6)

GMI

×

×

√   (7)

NRT SMAP

×

×

√   (8)

NASA SMAP

×

×

√  (9)

 

Table 2 shows the contributions from newly added GMI and SMAP soil moisture data layers to the Blended Soil Moisture layer in SMOPS.

Table 2. Percentages in the Blended Product from individual sensors.

Date

NRT SMOS

ASCAT-A

ASCAT-B

AMSR2

GMI

NRT SMAP

8/29/2016

46

27

28

28

62

51

8/30/2016

48

29

29

33

60

54

8/31/2016

46

23

27

27

63

60

Average

47

26

28

29

61

55

 

Planned work        

  • Work with OSPO to test the updated SMOPS V3.0 code and make it operational.

Products      

  • SMOPS V3.0 code.

Presentations       

  • “NOAA Soil Moisture Operational Product System (SMOPS): Version 3.0”,  Jicheng Liu, Xiwu Zhan,  Limin Zhao, Christopher R. Hain, Li Fang, and Jifu Yin, Weizhong Zheng, and Micheal Ek,  CICS-MD Science Meeting, December, 2016.

 

Performance Metrics

# of new or improved products developed that became operational

(please identify below the table)

1

# of products or techniques submitted to NOAA for consideration in operations use

1

# of peer reviewed papers

 

# of NOAA technical reports

 

# of presentations

1

# of graduate students supported by your CICS task

 

# of graduate students formally advised

 

# of undergraduate students mentored during the year

 

 

 

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