The Role of Vegetation, Aerosols and Surface Fluxes for Land-Atmosphere Feedbacks

植被、气溶胶和地表通量对陆地-大气反馈的作用

• 批准号: 0921898
• 负责人: Robert Dickinson
• 金额: $ 53.34万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-15 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0921898&HistoricalAwards=false
• 关键词: Role; Vegetation; Aerosols; Surface; Fluxes

Three different interactions within the climate system will be investigated in this project, involving at one end clouds and precipitation, and at the other end: 1) vegetation; 2) terrestrial aerosols (dust and biogenic volatile organic compounds); 3) land surface energy and water fluxes. The study of vegetation impact on the atmospheric branch of the hydrologic cycle follows two paths; observational analysis (relying heavily on remote sensing data) and climate modeling sensitivity studies. The aerosol-based component of the research contains direct analysis of each of the two types of aerosols followed by modeling studies, this time using a regional atmospheric model with much higer spatial resolution than the global climate model. These studies are targeted to improve the representation of these interactions in climate models. The investigators link assessments for vegetation and the aerosols they produce. The surface energy and water balance research is aimed primarily at model improvements for the land component of the climate model, using data from a network of in situ flux measurement sites to develop better parameterizations of surface processes. Three graduate students will be supported. The PI has maintained strong working and training relationships with the Chinese scientific community, and that effort continues in this project.

本项目将研究气候系统内三种不同的相互作用，一端涉及云和降水，另一端涉及：1）植被; 2）陆地气溶胶（灰尘和生物挥发性有机化合物）; 3）地表能量和水通量。 关于植被对水文循环大气分支影响的研究有两条途径：观测分析（主要依靠遥感数据）和气候模拟敏感性研究。 这项研究的气溶胶部分包括对两种气溶胶的直接分析，然后进行建模研究，这次使用的是空间分辨率比全球气候模型高得多的区域大气模型。 这些研究的目标是改善这些相互作用在气候模型中的代表性。 研究人员将对植被和它们产生的气溶胶的评估联系起来。 地表能量和水平衡研究的主要目的是改进气候模型中陆地部分的模型，利用来自现场通量测量点网络的数据，更好地确定地表过程的参数。 将资助三名研究生。 PI与中国科学界保持着牢固的工作和培训关系，并在该项目中继续努力。