Hurricane Warm-Core Retrievals from AMSU-A and Remapped ATMS Measurements with Rain Contamination Eliminated

Zou, X.; Tian, X.

doi:10.1029/2018JD028934

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Hurricane Warm-Core Retrievals from AMSU-A and Remapped ATMS Measurements with Rain Contamination Eliminated

2018
By Zou, X. ; Tian, X.
Source: Journal of Geophysical Research: Atmospheres, 123(19), 10,815–10,829

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Journal Title:

Journal of Geophysical Research: Atmospheres
Personal Author:

Zou, X. ; Tian, X.

Zou, X. ; Tian, X. Less -
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; CICSM (Cooperative Institute for Climate and Satellites Maryland)

NESDIS (National Environmental Satellite, Data, and Information Service) ; CICSM (Cooperative Institute for Climate and Satellites Maryland) Less -
Description:

Due to a shorter effective integration time for each field of view of the Advanced Microwave Temperature Sounder (ATMS) onboard the Suomi National Polar-orbiting Partnership (S-NPP) satellite than that for the Advanced Microwave Sounding Unit-A (AMSU-A) onboard previous National Oceanic and Atmospheric Administration (NOAA) polar-orbiting satellites NOAA-15 to NOAA-19, ATMS temperature-sounding channels have higher observational resolutions and larger noise equivalent differential temperatures than the corresponding AMSU-A channels. The high resolution of the ATMS allows hurricane rainband features that are not resolvable by AMSU-A to be captured. But the larger noise equivalent differential temperature of ATMS weakens this capability through the significant impact of observational noise on warm-core retrievals. In this study, a remapping algorithm is applied to obtain AMSU-A-like ATMS fields of view to suppress this noise. A modified warm-core retrieval algorithm, which consists of two sets of training coefficients for clear-sky and cloudy conditions, is applied to limb-corrected ATMS and AMSU-A measurements using collocated Global Positioning System radio occultation observations in the previous month of the targeted hurricanes as training data sets. ATMS channels 5, 6, and 7 (AMSU-A channels 4, 5, and 6) are excluded when training the coefficients for cloudy conditions to avoid cloud/rain contamination. As a result, the abnormal cold core in the low and middle troposphere and the banded warm structures in phase with rainbands are both successfully removed. The warm-core evolution of Hurricane Matthew (2016) during its entire life span is temporally consistent on intensity as obtained from NOAA-15, NOAA-18, and MetOp-B AMSU-A observations and S-NPP ATMS observations.
Keywords:

[+]

AMSU-A ATMS Hurricane Matthew Noise Mitigation Temperature Retrieval Warm-core
Source:

Journal of Geophysical Research: Atmospheres, 123(19), 10,815–10,829
DOI:

https://doi.org/10.1029/2018JD028934
Format:

PDF
Document Type:

Journal Article
Funding:

Grant no. NA14NES4320003
License:

https://creativecommons.org/licenses/by-nc-nd/4.0/
Rights Information:

CC BY-NC-ND
Compliance:

CHORUS
Main Document Checksum:

[+]

urn:sha256:d30ff6dde9570dcd7237a22e462e3add7979978709429e27ad3ee30a0361fa44
Download URL:

https://repository.library.noaa.gov/view/noaa/48650/noaa_48650_DS1.pdf
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Hurricane Warm-Core Retrievals from AMSU-A and Remapped ATMS Measurements with Rain Contamination Eliminated

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