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Diurnal Cycle of IMERG V06 Precipitation
Author(s) -
Tan Jackson,
Huffman George J.,
Bolvin David T.,
Nelkin Eric J.
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl085395
Subject(s) - diurnal cycle , precipitation , environmental science , climatology , global precipitation measurement , diurnal temperature variation , satellite , lag , water cycle , atmospheric sciences , meteorology , geography , computer science , geology , computer network , aerospace engineering , engineering , ecology , biology
This study demonstrates the maturing ability of the half‐hourly precipitation estimates from the Integrated Multi‐satellitE Retrievals for GPM (IMERG) for use in global analyses of the diurnal cycle. The refined intercalibration and interpolation between the sensors in V06 leads to greater consistency in the precipitation retrievals over different hours of the day. Evaluation against ground measurements suggests a slight lag in the diurnal phase of only +0.59 hr. We demonstrate the diurnal cycle over different regions around the globe, including the Maritime Continent, where accurate representation of precipitation variability in global models remains a challenge. Using examples over Singapore, Bangladesh, and Lake Victoria, we reveal the intricate interplay between diurnal and seasonal variability. This study demonstrates the unprecedented capability of IMERG in capturing the diurnal cycle of precipitation globally, potentially advancing our understanding in regions of sparse ground measurements and supporting improvements in its representation in global models.