ry and Wet Climate Periods over Eastern South America: Identification and Characterization through the SPEI Inde

Autor(es)

Drumond, Anita ^[1] ; Stojanovic, Milica ^[2] ; Nieto, Raquel ^[3] ; Gimeno, Luis ^[3] ; Liberato, Margarida L. R. ^{[2, 4]} ; Pauliquevis, Theotonio ^[1] ; Oliveira, Marina ^[1] ; Ambrizzi, Tercio ^[5]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, BR-09913030 Diadema - Brazil

^[2] Univ Lisbon, Inst Dom Luiz, Fac Ciencias, P-1749016 Campo Grande - Portugal

^[3] Univ Vigo, Environm Phys Lab EPhysLab, CIM UVigo, Orense 32004 - Spain

^[4] Univ Tras Os Montes & Alto Douro, Escola Ciencias & Tecnol, P-5001801 Vila Real - Portugal

^[5] Univ Sao Paulo, Dept Ciencias Atmosfer, IAG, BR-05508090 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ATMOSPHERE; v. 12, n. 2 FEB 2021.
• Citações Web of Science: 2

Resumo

A large part of the population and the economic activities of South America are located in eastern regions of the continent, where extreme climate events are a recurrent phenomenon. This study identifies and characterizes the dry and wet climate periods at domain-scale occurring over the eastern South America (ESA) during 1980-2018 through the multi-scalar Standardized Precipitation-Evapotranspiration Index (SPEI). For this study, the spatial extent of ESA was defined according to a Lagrangian approach for moisture analysis. It consists of the major continental sink of the moisture transported from the South Atlantic Ocean throughout the year, comprising the Amazonia, central Brazil, and the southeastern continental areas. The SPEI for 1, 3, 6, and 12 months of accumulation was calculated using monthly precipitation and potential evapotranspiration time series averaged on ESA. The analysis of the climate periods followed two different approaches: classification of the monthly SPEI values as mild, moderate, severe, and extreme; the computation of the events and their respective parameters (duration, severity, intensity, and peak). The results indicate that wet periods prevailed in the 1990s and 2000s, while dry conditions predominated in the 2010s, when the longest and more severe dry events have been identified at the four scales. (AU)

• Processo FAPESP: 17/09659-6 - Variabilidade interanual dos transportes meridionais através da rede transatlântica SAMOC (SAMBAR)
• Beneficiário: Edmo José Dias Campos
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/50848-9 - INCT 2014: INCT para Mudanças Climáticas (INCT-MC)
• Beneficiário: Jose Antonio Marengo Orsini
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 20/09548-2 - Eventos climáticos extremos no Grande ABC: identificação via índice padronizado de precipitação, condições oceânicas associadas e impactos socioambientais
• Beneficiário: Marina de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica