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RISCase Studies of Extreme Climatic Events in the Amazon Basin
Publisher: American Meteorological Society
Abstract: The mechanisms of climate anomalies in the Amazon basin were explored from surface climatological and hydrological series, upper-air, and satellite observations. The paper is focused on the March?April rainy season peak ...
Interannual Variability of the Rainy Season and Rainfall in the Brazilian Amazon Basin
Publisher: American Meteorological Society
Abstract: Interannual variability of seasonal rainfall in the Brazilian Amazon basin is examined in context of its relationship to sea surface temperatures in the tropical Pacific and Atlantic Oceans. Linear correlations reveal ...
Cold Surges in Tropical and Extratropical South America: The Strong Event in June 1994
Publisher: American Meteorological Society
Abstract: The authors investigate one case of surges of polar air that occasionally propagate into southeastern Brazil during wintertime and are harmful to coffee production because of the freezing conditions associated with them. ...
Climatology of the Low-Level Jet East of the Andes as Derived from the NCEP–NCAR Reanalyses: Characteristics and Temporal Variability
Publisher: American Meteorological Society
Abstract: A climatology of the South American low-level jet east of the Andes (SALLJ) is developed using the 1950? 2000 circulation and moisture fields from the NCEP?NCAR reanalyses and available upper-air observations made in Bolivia ...
Climatic Impacts of “Friagens” in Forested and Deforested Areas of the Amazon Basin
Publisher: American Meteorological Society
Abstract: Meteorological observations from the Anglo?Brazilian Amazonian Climate Observation Study (ABRACOS), together with the global reanalysis from the National Center for Environmental Prediction (NCEP) and satellite images, ...
Aerial Rivers and Lakes: Looking at Large-Scale Moisture Transport and Its Relation to Amazonia and to Subtropical Rainfall in South America
Publisher: American Meteorological Society
Abstract: his is an observational study of the large-scale moisture transport over South America, with some analyses on its relation to subtropical rainfall. The concept of aerial rivers is proposed as a framework: it is an analogy ...
A Comparison of Rainfall, Outgoing Longwave Radiation, and Divergence over the Amazon Basin
Publisher: American Meteorological Society
Abstract: Observed rainfall, outgoing longwave radiation (OLR), divergence, and precipitation from the reanalysis project of the National Centers for Environmental Prediction and the National Center for Atmospheric Research are ...
Submonthly Convective Variability over South America and the South Atlantic Convergence Zone
Publisher: American Meteorological Society
Abstract: Relationships between deep convection over South America and the atmospheric circulation are examined, with emphasis on submonthly variations of the South Atlantic convergence zone (SACZ) during austral summer. Outgoing ...
Downstream Amplification: A Possible Precursor to Major Freeze Events over Southeastern Brazil
Publisher: American Meteorological Society
Abstract: Many frost events over southeastern Brazil are accompanied by a large-amplitude upper trough of the middle latitudes that extends well into the Tropics. This paper first illustrates that a mechanism of downstream amplification ...
Application of Evapoclimatonomy to Monthly Surface Water Balance Calculations at the HAPEX-Sahel Supersites
Publisher: American Meteorological Society
Abstract: In this paper a revised verstion of Lettau's evapoclimatonomy model is used to simulate climate in West Africa. The model is applied specifically to the study sites of the HAPEX-Sahel region in Niger, an international ...