DOI: 10.5194/hess-18-2577-2014
Scopus记录号: 2-s2.0-84904299413
论文题名: The role of the Amazon Basin moisture in the atmospheric branch of the hydrological cycle: A Lagrangian analysis
作者: Drumond A ; , Marengo J ; , Ambrizzi T ; , Nieto R ; , Moreira L ; , Gimeno L
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 7 起始页码: 2577
结束页码: 2598
语种: 英语
Scopus关键词: Atmospheric humidity
; Atmospheric pressure
; Budget control
; Lagrange multipliers
; Moisture
; Forward-and-backward
; Hydrological budgets
; Hydrological cycles
; Interannual variability
; Interannual variation
; Lagrangian analysis
; Southeastern South America
; Southern oscillation
; Tropics
; El Nino
; El Nino-Southern Oscillation
; evaporation
; hydrological cycle
; Lagrangian analysis
; moisture transfer
; precipitation (climatology)
; water budget
; Amazon Basin
; Atlantic Ocean
; Atlantic Ocean (North)
; Atlantic Ocean (South)
; Atlantic Ocean (Tropical)
英文摘要: We used a Lagrangian model (FLEXPART) together with the 1979-2012 ERA-Interim reanalysis data to investigate the role of the moisture in the Amazon Basin in the regional hydrological budget over the course of the year. FLEXPART computes budgets of evaporation minus precipitation by calculating changes in the specific humidity along forward and backward trajectories. The tropical Atlantic is the most important remote moisture source for the Amazon Basin. The tropical North Atlantic (NA) mainly contributed during the austral summer, while the contribution of the tropical South Atlantic (SA) prevailed for the remainder of the year. At the same time, the moisture contribution from the Amazon Basin itself is mainly for moisture supplying the southeastern South America. The 33-year temporal domain allowed the investigation of some aspects of the interannual variability of the moisture transport over the basin, such as the role of the El Niño Southern Oscillation (ENSO) and the Atlantic Meridional Mode (AMM) on the hydrological budget. During the peak of the Amazonian rainy season (from February to May, FMAM) the AMM is associated more with the interannual variations in the contribution from the tropical Atlantic sources, while the transport from the basin towards the subtropics responds more to the ENSO variability. The moisture contribution prevailed from the SA (NA) region in the years dominated by El Niño/positive AMM (La Niña/negative AMM) conditions. The transport from the Amazon towards the subtropics increased (reduced) during El Niño (La Niña) years. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78194
Appears in Collections: 气候变化事实与影响
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作者单位: Ephyslab, Facultad de Ciencias, UVIGO, Ourense, Spain; CCST INPE, Cachoeira Paulista, Sao Paulo, Brazil; Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, USP, Sao Paulo, Brazil; Institute of Applied Physics, University of Bern, Bern, Switzerland
Recommended Citation:
Drumond A,, Marengo J,, Ambrizzi T,et al. The role of the Amazon Basin moisture in the atmospheric branch of the hydrological cycle: A Lagrangian analysis[J]. Hydrology and Earth System Sciences,2014-01-01,18(7)