Mesoscale Modeling of Tropical Paleoclimate

热带古气候的中尺度模拟

基本信息

  • 批准号:
    0123797
  • 负责人:
  • 金额:
    $ 26.06万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2002
  • 资助国家:
    美国
  • 起止时间:
    2002-07-01 至 2006-06-30
  • 项目状态:
    已结题

项目摘要

This award will serve to develop and apply a mesoscale modeling system for studying past variability in tropical climates of Africa and South America during the Last Glacial Maximum (LGM). The modeling system consists of two models. A mesoscale climate model (MCM) will simulate climate on space scales of tens of kilometers. A general circulation model (GCM) will generate lateral boundary conditions on wind, temperature, and moisture for the mesoscale model. Simulations of the dry climates of the present day and LGM (~21,000 years ago) over northern Africa will be contrasted with simulations for the African Humid Period, approximately 6,000 years ago when Sahelian and Saharan Africa supported numerous lakes and extensive vegetation. The research will address the following questions:-What are the individual and combined roles of insolation, changes in land surface conditions, regional SST differences, and differences in large-scale climate (i.e., MCM lateral boundary conditions) in causing differences in surface wetness over northern Africa among the present day, African Humid Period and the LGM?-Are the differences in wetness associated with changes in precipitation only, or do changes in evaporation and/or water table levels play an important role?-What mechanisms are involved in changing the atmospheric column water vapor budget? -Are any important mechanisms nonlinear in a way that helps explain the speed with which the climate can change in this region? What are the implications for future climate change (global warming)?Simulations with various combinations of lateral and surface boundary conditions, as well as other forcing functions such as insolation and atmospheric composition, will identify the important factors and physical mechanisms that lead to the wet conditions and the rapid climate change that is hypothesized to have occurred in Amazonia during the Holocene. The mesoscale modeling system will also be used to study South American climate of the LGM.The research will address the following questions:-What was the distribution of drying and cooling during the LGM in the Amazon Basin and what mechanisms are associated with the differences from the present day climate?-What differences in aridity in the Central Andes are simulated with the MCM, and what mechanisms account for differences from the present day?-How are the simulated differences in both regions related to global-scale climate conditions and how are they linked?-Does the model support the idea that there are different aridity trends in different areas of the high Central Andes? If so, are these trends providing information about inter-hemispheric symmetry or asymmetry of climate change during the last glacial cycle?
该奖项将用于开发和应用一个中尺度模拟系统,以研究非洲和南美洲在末次盛冰期(LGM)期间热带气候的过去变化。建模系统由两个模型组成。中尺度气候模式(MCM)将模拟数十公里空间尺度的气候。大气环流模式(GCM)将为中尺度模式生成风、温度和湿度的横向边界条件。 对北方非洲现今和末次盛期(约21,000年前)干旱气候的模拟将与对非洲湿润期的模拟进行对比,非洲湿润期约为6,000年前,当时萨赫勒和撒哈拉非洲支持许多湖泊和广泛的植被。研究将解决以下问题:-日照、地表条件变化、区域SST差异和大尺度气候差异(即,MCM横向边界条件)在造成北方非洲表面湿度差异之间的今天,非洲潮湿期和末次盛冰期?湿度的差异是否仅与降水量的变化有关,还是蒸发和/或地下水位的变化起着重要作用?改变大气柱水汽收支的机制是什么?- 是否有任何重要的非线性机制有助于解释该地区气候变化的速度?对未来气候变化(全球变暖)有什么影响?采用横向和表面边界条件的各种组合以及日照和大气成分等其他强迫函数进行模拟,将确定导致潮湿条件和假设发生在亚马逊地区的快速气候变化的重要因素和物理机制。全新世期间。中尺度模拟系统还将用于研究末次冰期的南美气候。研究将解决以下问题:-亚马逊盆地末次冰期期间干燥和冷却的分布情况如何,以及与现代气候差异相关的机制是什么?- MCM模拟了中部安第斯山脉的干旱程度有哪些差异,是什么机制导致了与现在的差异?这两个地区的模拟差异与全球气候条件有何关系?它们之间有何联系?该模型是否支持在高中部安第斯山脉的不同地区有不同干旱趋势的观点?如果是的话,这些趋势是否提供了关于末次冰期气候变化的半球间对称性或不对称性的信息?

项目成果

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Kerry Cook其他文献

Detection of allergic transfusion‐related adverse events from electronic medical records
从电子病历中检测过敏性输血相关不良事件
  • DOI:
    10.1111/trf.17069
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    2.9
  • 作者:
    B. Whitaker;Jeno Pizarro;M. Deady;Alan Williams;H. Ezzeldin;A. Belov;Sami Kanderian;Douglas Billings;Kerry Cook;A. Z. Hettinger;S. Anderson
  • 通讯作者:
    S. Anderson
Monsoons Climate Change Assessment
季风气候变化评估
  • DOI:
    10.1175/bams-d-19-0335.1
  • 发表时间:
    2020-05
  • 期刊:
  • 影响因子:
    8
  • 作者:
    Bin Wang;Michela Biasutti;Michael P. Byrne;Christopher Castro;Chih-Pei Chang;Kerry Cook;Rong Fu;Alice M. Grimm;Kyung-Ja Ha;Harry Hendon;Akio Kitoh;R. Krishnan;June-Yi Lee;Jianping Li;Jian Liu;Aurel Moise;Salvatore Pascale;M. K. Roxy;Anji Seth;Chung-Hsiung
  • 通讯作者:
    Chung-Hsiung
Networked learning.
网络学习。
  • DOI:
  • 发表时间:
    2009
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Kerry Cook
  • 通讯作者:
    Kerry Cook

Kerry Cook的其他文献

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{{ truncateString('Kerry Cook', 18)}}的其他基金

Collaborative Research: Connecting the Past, Present, and Future Climate of the Lake Victoria Basin using High-Resolution Coupled Modeling
合作研究:使用高分辨率耦合建模连接维多利亚湖盆地的过去、现在和未来气候
  • 批准号:
    2323648
  • 财政年份:
    2024
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
Multi-scale Analysis of Congo Basin Precipitation: Understanding the Regional Rainfall Climatology and the Potential for Change
刚果盆地降水的多尺度分析:了解区域降雨气候学和变化潜力
  • 批准号:
    1939880
  • 财政年份:
    2020
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
Seasonality of East African Rainfall
东非降雨的季节性
  • 批准号:
    1701520
  • 财政年份:
    2017
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
Regional Climate Resilience and Sensitivity in the Tropics and Subtropics
热带和亚热带区域气候恢复力和敏感性
  • 批准号:
    1356386
  • 财政年份:
    2014
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
African Monsoon Systems: Basic Dynamics and Applications to Interannual and Decadal Prediction
非洲季风系统:基本动力学及其在年际和年代际预测中的应用
  • 批准号:
    1036604
  • 财政年份:
    2011
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
Collaborative Research: Climate Forecasting, Adaptation Backcasting: Coupling Human Response to Climate Change in Malawi
合作研究:气候预测、适应回溯:马拉维人类对气候变化的反应
  • 批准号:
    1060116
  • 财政年份:
    2011
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
SGER: Hydrodynamics of the Caribbean Low-Level Jet and Its Relationship to Drought
SGER:加勒比低空急流的流体动力学及其与干旱的关系
  • 批准号:
    0739965
  • 财政年份:
    2007
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
Evaluation of the Great Plains Low-level Jet and Its Relationship to Mid-West Precipitation in Coupled General Circulation Model (GCM) Simulations of the 20th and 21st Centuries
20世纪和21世纪耦合大气环流模型(GCM)模拟中大平原低空急流的评估及其与中西部降水的关系
  • 批准号:
    0701129
  • 财政年份:
    2007
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant
Understanding the Seasonal Cycle of Rainfall over Northern Africa
了解北非降雨的季节周期
  • 批准号:
    0415481
  • 财政年份:
    2004
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Continuing Grant
SGER: Sensitivity of the West African Monsoon to Gulf of Guinea Sea Surface Temperatures (SSTs)
SGER:西非季风对几内亚湾海面温度(SST)的敏感性
  • 批准号:
    0446791
  • 财政年份:
    2004
  • 资助金额:
    $ 26.06万
  • 项目类别:
    Standard Grant

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合作研究:通过理想化耦合气候模型了解气候变化下热带气旋与热带环流之间的联系
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