Diagnostics of the Mechanisms that Control the Interannual Variations of the South American Climate and Its Connection to Climate over North America

南美气候年际变化控制机制诊断及其与北美气候的关系

• 批准号: 0203761
• 负责人: Rong Fu
• 金额: $ 35.77万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0203761&HistoricalAwards=false
• 关键词: Diagnostics; Mechanisms; Control; Interannual; Variations

This project is an investigation of factors that influence the start and end of the rainy season in tropical South America and hence influence agricultural productivity and the availability of water resources. The objectives are: (i) to determine the influence of large-scale circulation anomalies, especially those forced by interannual variations of sea-surface temperatures in the adjacent oceans, on the key thermal and dynamic factors that control the onset and demise of the rainy season over the northern part of South America, (ii) to explore how land-surface processes and bio-mass burning modify the atmospheric boundary layer conditions needed for the onset of the rainy season by influencing pre-seasonal climate conditions, (iii) to characterize the link between regional climates in tropical South America, Central and North America via cross-equatorial flow and to identify the underlying dynamic processes. The approach to be taken consists of a diagnostic study of a number of data sets relevant to the climatology of the region. The data include: ECMWF reanalyses, South American rain gauge data, in situ surface fluxes and soil moisture from the Large Scale Biosphere-Atmosphere Experiment in Amazonia, instantaneous cloud data from the International Satellite Cloud Climatology Project, aerosol optical depth from the Total Ozone Mapping Spectrometer, and the NASA-Ames 8-km Amazon Ecology Mapping data.

该项目是对影响南美热带雨季开始和结束的因素的调查，因此影响了农业生产力和水资源的可用性。 目的是：（i）确定大规模循环异常的影响，尤其是那些因邻近海洋中的海面温度的年度变化而强迫的影响，对控制南美北部地区（ii）范围内的雨季和境地的关键热和动态因素，控制雨季的雨季和衰老，以探索陆地上的范围，并探索境地的范围。雨季通过影响季节前气候条件的雨季（III）来表征热带南美热带气候，中部和北美地区通过跨备流流量之间的联系，并确定基本的动态过程。 所采用的方法包括对与该地区气候相关的许多数据集的诊断研究。 The data include: ECMWF reanalyses, South American rain gauge data, in situ surface fluxes and soil moisture from the Large Scale Biosphere-Atmosphere Experiment in Amazonia, instantaneous cloud data from the International Satellite Cloud Climatology Project, aerosol optical depth from the Total Ozone Mapping Spectrometer, and the NASA-Ames 8-km Amazon Ecology Mapping data.