Do the recent severe droughts in the Amazonia have the same period of length?

Autor(es)

Zou, Yong ^{[1, 2]} ; Macau, Elbert E. N. ^[3] ; Sampaio, Gilvan ^[4] ; Ramos, Antnio M. T. ^[3] ; Kurths, Juergen ^{[5, 6, 2, 7]}

Afiliação do(s) autor(es)

^[1] E China Normal Univ, Dept Phys, Shanghai 200062 - Peoples R China

^[2] Potsdam Inst Climate Impact Res, POB 60 12 03, D-14412 Potsdam - Germany

^[3] Inst Nacl Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos, SP - Brazil

^[4] Inst Nacl Pesquisas Espaciais, Cachoeira Paulista, SP - Brazil

^[5] Univ Aberdeen, Inst Complex Syst & Math Biol, Aberdeen AB24 3UE - Scotland

^[6] Nizhnii Novgorod State Univ, Dept Control Theory, Gagarin Ave 23, Nizhnii Novgorod 606950 - Russia

^[7] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod - Russia

• Tipo de documento: Artigo Científico
• Fonte: Climate Dynamics; v. 46, n. 9-10, p. 3279-3285, MAY 2016.
• Citações Web of Science: 14

Resumo

We propose a new measure based on drought period length to assess the temporal difference between the recent two severe droughts of 2005 and 2010 in the Amazonia. The sensitivity of the measure is demonstrated by disclosing the distinct spatial responding mechanisms of the Northeastern and Southwestern Amazon (NA, SA) to the surrounding sea surface temperature (SST) variabilities. The Pacific and Atlantic oceans have different roles on the precipitation patterns in Amazonia. More specifically, the very dry periods in the NA are influenced by El Nio events, while the very dry periods in the SA are affected by the anomalously warming of the SST in the North Atlantic. Our analysis discloses convincingly that the drought 2005 hit SA, which is correlated to the North Atlantic only. Furthermore, it suggests that there are two phases in the drought 2010: (1) it was started in the NA in August 2009 co-occurred with the El Nio event, and (2) later shifted the center of action to SA resulted from anomalously high SST in North Atlantic, which further intensifies the impacts on the spatial coverage. (AU)

• Processo FAPESP: 11/50151-0 - Fenômenos dinâmicos em redes complexas: fundamentos e aplicações
• Beneficiário: Elbert Einstein Nehrer Macau
• Modalidade de apoio: Auxílio à Pesquisa - Temático