Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product
Item
Title (Dublin Core)
Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product
Description (Dublin Core)
A new algorithm is derived for rain rate (RR) estimation from Advanced Microwave Sounding Radiometer 2 (AMSR2) measurements taken at 6.9, 7.3, and 10.65 GHz. The algorithm is based on the numerical simulation of brightness temperatures (TB) for AMSR2 lower frequency channels, using a simplified radiation transfer model. Simultaneous meteorological and hydrological observations, supplemented with modeled values of cloud liquid water content and rain rate values, are used for the calculation of an ensemble of AMSR2 TBs and RRs. Ice clouds are not taken into account. AMSR2 brightness temperature differences at C- and X-band channels are then used as inputs to train a neural network (NN) function for RR retrieval. Validation is performed against Tropical Rain Measurement Mission (TRMM) Microwave Instrument (TMI) RR products. For colocated AMSR2-TMI measurements, obtained within 10 min intervals, errors are about 1 mm/h. The new algorithm is applicable for RR estimation up to 20 mm/h. For RR<2 mm/h the retrieval error is 0.3 mm/h. For RR>10 mm/h the algorithm significantly underestimates TMI RR.
Creator (Dublin Core)
Elizaveta Zabolotskikh
Bertrand Chapron
Subject (Dublin Core)
Meteorology. Climatology
QC851-999
Publisher (Dublin Core)
Hindawi Limited
Date (Dublin Core)
2015-01-01T00:00:00Z
Type (Dublin Core)
article
Identifier (Dublin Core)
1687-9309
1687-9317
10.1155/2015/492603
https://doaj.org/article/8abadf0910574f8a9c89b7c68d1e279b
Source (Dublin Core)
Advances in Meteorology, Vol 2015 (2015)
Language (Dublin Core)
EN
Relation (Dublin Core)
http://dx.doi.org/10.1155/2015/492603
https://doaj.org/toc/1687-9309
https://doaj.org/toc/1687-9317
Provenance (Dublin Core)
Journal Licence: CC BY