@Article{MichotViArCoRoFuDu:2018:PeTRTM,
author = "Michot, V{\'e}ronique and Vila, Daniel Alejandro and Arvor,
Damien and Corpetti, Thomas and Ronchail, Josyane and Funatsu,
Beatriz and Dubreuil, Vincent",
affiliation = "{French National Center for Scientific Research (CNRS)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {French
National Center for Scientific Research (CNRS)} and {French
National Center for Scientific Research (CNRS)} and {University
Paris Diderot} and CNRS, Universit{\'e} de Nantes and {French
National Center for Scientific Research (CNRS)}",
title = "Performance of TRMM TMPA 3B42 V7 in replicating daily rainfall and
regional rainfall regimes in the Amazon Basin (1998-2013)",
journal = "Remote Sensing",
year = "2018",
volume = "10",
number = "12",
pages = "1879",
keywords = "daily rainfall estimations, TRMM 3B42 v7, rain gauges, Amazon
Basin, regional rainfall regimes, regional rainfall sub-regimes.",
abstract = "Knowledge and studies on precipitation in the Amazon Basin (AB)
are determinant for environmental aspects such as hydrology,
ecology, as well as for social aspects like agriculture, food
security, or health issues. Availability of rainfall data at high
spatio-temporal resolution is thus crucial for these purposes.
Remote sensing techniques provide extensive spatial coverage
compared to ground-based rainfall data but it is imperative to
assess the quality of the estimates. Previous studies underline at
regional scale in the AB, and for some years, the efficiency of
the Tropical Rainfall Measurement Mission (TRMM) 3B42 Version 7
(V7) (hereafter 3B42) daily product data, to provide a good view
of the rainfall time variability which is important to understand
the impacts of El Nino Southern Oscilation. Then our study aims to
enhance the knowledge about the quality of this product on the
entire AB and provide a useful understanding about his capacity to
reproduce the annual rainfall regimes. For that purpose we
compared 3B42 against 205 quality-controlled rain gauge
measurements for the period from March 1998 to July 2013, with the
aim to know whether 3B42 is reliable for climate studies. Analysis
of quantitative (Bias, Relative RMSE) and categorical statistics
(POD, FAR) for the whole period show a more accurate spatial
distribution of mean daily rainfall estimations in the lowlands
than in the Andean regions. In the latter, the location of a rain
gauge and its exposure seem to be more relevant to explain
mismatches with 3B42 rather than its elevation. In general, a good
agreement is observed between rain gauge derived regimes and those
from 3B42; however, performance is better in the rainy period.
Finally, an original way to validate the estimations is by taking
into account the interannual variability of rainfall regimes
(i.e., the presence of sub-regimes): four sub-regimes in the
northeast AB defined from rain gauges and 3B42 were found to be in
good agreement. Furthermore, this work examined whether TRMM 3B42
V7 rainfall estimates for all the grid points in the AB, outgoing
longwave radiation (OLR) and water vapor flux patterns are
consistent in the northeast of AB.",
doi = "10.3390/rs10121879",
url = "http://dx.doi.org/10.3390/rs10121879",
issn = "2072-4292",
label = "lattes: 6440821154496824 2 MichotViArCoRoFuDu:2018:PeTRTM",
language = "en",
targetfile = "michot_performance.pdf",
urlaccessdate = "03 maio 2024"
}