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Research center of Embrapa/Collection: Embrapa Solos - Artigo em periódico indexado (ALICE)
Date Issued: 2008
Type of Material: Artigo em periódico indexado (ALICE)
Authors: ARVOR, D.
Additional Information: Damien Arvor, Université Rennes; Vincent Dubreuil, Université Rennes e Universidade de Brasília; Josyane Ronchail, Université Paris; Margareth Simões Penello Meirelles, Embrapa Solos.
Title: Apport des donnees TRMM 3B42 a l´etude des precipitations au Mato Grosso.
Publisher: Climatologie, v. 5, p. 49-69, 2008.
Language: fr
Keywords: TRMM
Mato Grosso
Rainy season
Description: In tropical regions where convective rainfall is predominant while raingauge networks are deficient, satellite estimates as proposed by the Tropical Rainfall Measuring Mission (TRMM) can represent an efficient alternative way of studying rainfall spatiotemporal variability. A Principal Component Analysis based on monthly data allows mapping the various rainy regimes encountered in the south Amazonian state of Mato Grosso (Brazil). The TRMM 3B42 products are then validated based on statistical indexes. It permits determining an optimal 5-days temporal scale, which is then used to calculate rainy season parameters such as date of onset and end and duration. Those parameters are established based on the ?Anomalous Accumulation? method proposed by Liebmann (2006). The date of onset occurs in October and occurs later in the south-east than in the north-west. The date of end is detected in March and progresses according to a N-S orientation. Consequently, the rainy season duration lasts from four to five months. It appears that the duration variability is especially linked to the onset variability (more than 2 months between 2 extreme years in 8 years) while the end of the rainy season is much more regular. Moreover, the onset date displays a 15 days amplitude between the main soybean productions regions. Thus, it explains the various agricultural calendars applied in Mato Grosso and help explaining the farmer?s vulnerability.
Data Created: 2009-02-09
Appears in Collections:Artigo em periódico indexado (CNPS)

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