Time-Lag Correlation Between Passive Microwave Measurements and Surface Precipitation and Its Impact on Precipitation Retrieval Evaluation

You, Yalei; Meng, Huan; Dong, Jun; Rudlosky, Scott

doi:10.1029/2019gl083426

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Time-Lag Correlation Between Passive Microwave Measurements and Surface Precipitation and Its Impact on Precipitation Retrieval Evaluation

2019
By You, Yalei ; Meng, Huan ; Dong, Jun ; ...
Source: Geophysical Research Letters, 46, 8415– 8423

[PDF-1.99 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

You, Yalei ; Meng, Huan ; Dong, Jun ; Rudlosky, Scott

You, Yalei ; Meng, Huan ; Dong, Jun ; Rudlosky, Scott Less -
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research) ; CICS (Cooperative Institute for Climate and Satellites)

NESDIS (National Environmental Satellite, Data, and Information Service) ; STAR (Center for Satellite Applications and Research) ; CICS (Cooperative Institute for Climate and Satellites) Less -
Description:

This study investigates the correlation between the upwelling microwave brightness temperature measured by satellite radiometer and surface precipitation rate from ground radar observations at different time lags. Results show that brightness temperatures correlate more strongly with the lagged surface precipitation rate than the simultaneous surface precipitation rate. The lag time for snowfall ranges from 30 to 60 min. This time lag effect has an important influence when evaluating the satellite retrieval results relative to ground observations. For example, the falsely identified pixels can decrease by as much as 23.88% when considering a 30-min lag time. Furthermore, the satellite-retrieved snowfall rate shows much stronger correlation with the time-lagged surface snowfall rate than the simultaneous snowfall rate in cold environments and for tall storms. This work implies that the time of the level-2 swath-retrieved snowfall rate needs to shift forward when incorporated into the level-3 gridded products.
Keywords:

[+]

Microwave Measurements Remote Sensing Satellite Snowfall Retrieval Time Lag Correlation
Source:

Geophysical Research Letters, 46, 8415– 8423
DOI:

https://doi.org/10.1029/2019gl083426
Document Type:

Journal Article
Funding:

Grant no. NA14NES4320003
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Other
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Submitted
Main Document Checksum:

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urn:sha256:4b500a7e57d94cfdfbba6879624c8366cb9c3267f6a9e964aa9e5f93d1dcba03
Download URL:

https://repository.library.noaa.gov/view/noaa/45202/noaa_45202_DS1.pdf
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Time-Lag Correlation Between Passive Microwave Measurements and Surface Precipitation and Its Impact on Precipitation Retrieval Evaluation

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