Collaborative Research: WCR: Is Deforestation Changing the Hydrologic Climate and Vegetation Dynamics of the Amazon?

合作研究：WCR：森林砍伐是否正在改变亚马逊的水文气候和植被动态？

• 批准号: 0449793
• 负责人: Rafael Bras
• 金额: $ 39.96万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-03-01 至 2011-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0449793&HistoricalAwards=false
• 关键词: Collaborative; Research; WCR; Deforestation; Changing

In this collaborative work, the PIs will test the hypothesis that the long-term hydrologic climate of Amazonia is changing as a result of deforestation. A regional coupled atmosphere-biosphere-hydrosphere model will be developed. The model's formulation addresses important limitations in earlier studies of Amazonian deforestation by (i) simulating observed patterns of land-cover change, (ii) simulating the long-term (decadal-to-century scale) consequences of the interaction between the vegetation, atmosphere and land-surface hydrology, (iii) incorporating forest edge effects (sub-grid scale variability in vegetation dynamics associated with forest pasture-interfaces), and (iv) running at spatial resolutions high enough to simulate explicitly mesoscale variability in important hydrologic climate processes such as cloud formation that are caused by fine scale patterns of deforestation. The following three sub-hypotheses will be evaluated:Hypothesis 1: Observed patterns of deforestation are changing the long-term hydrologic climate of Amazonia.Hypothesis 2: The changing hydrologic climate is changing both short (hourly-seasonal-yearly) and long-term (yearly-decadal) vegetation dynamics across the region.Hypothesis 3: Changes in the land surface arising from the changing hydrologic climate are, in turn, shifting the climate and hydrologic cycle towards a more arid state.The constrained model will then be used to predict the future state of the hydrologic climate and vegetation of the region.The results from this study will be disseminated through webpages and links to existing Amazon research programs. It is planned to prepare an outreach program for high schools in Boston. Graduate and undergraduate students will be involved in the research.

在这项协作工作中，PI将检验以下假设：森林砍伐的结果是亚马逊的长期水文气候正在发生变化。将开发区域耦合大气 - 双圈 - 摩圈模型。该模型的表述通过（i）模拟观察到的土地覆盖变化的模式来解决对亚马逊森林砍伐的早期研究的重要局限空间分辨率足够高，足以模拟重要的水文气候过程中明确的中尺度变异性，例如由森林砍伐的细化模式引起的云形成。将评估以下三个子假期：假设1：观察到的森林砍伐模式正在改变亚马逊症的长期水文气氛。Hypothesis2：变化的水文气候正在改变短暂的（每小时每年）（每小时季节）和长期（年度 - 成年）的植被跨整个地区的植被。气候和水文循环朝着更干旱的状态。然后，受约束模型将用于预测该地区水文气候和植被的未来状态。这项研究的结果将通过网页和与现有亚马逊研究计划的链接传播。计划为波士顿的高中制定外展计划。研究生和本科生将参与研究。