Sahel Seasonal to Decadal Climate Variability and Atmosphere/Surface Two-Way Interactions

萨赫勒季节到十年的气候变化和大气/地表双向相互作用

基本信息

  • 批准号:
    1115506
  • 负责人:
  • 金额:
    $ 41.39万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2011
  • 资助国家:
    美国
  • 起止时间:
    2011-09-15 至 2014-08-31
  • 项目状态:
    已结题

项目摘要

Dramatic change over the Sahel from wet conditions in the 1950s to much drier conditions in the 1970s and the 1980s and then to partial recovery since the 1990s, represents one of the strongest interdecadal signals on Earth in the twentieth century. Studies suggest that Sahel climate variability is strongly influenced by external forcings: sea surface temperature (SST), land surface processes, and aerosols. However, general circulation model (GCM) studies with a single external forcing (for example, SST) have not been able to reproduce full seasonal, interannual, and decadal variability and anomalies (SIDVA) of Sahel climate. In most of these studies, SST, land, and aerosol conditions were specified, i.e., there was only one way interaction. The relative roles of the external forcings and their two-way interactions in the Sahel climate SIDVA have never been quantitatively and comprehensively examined. This project will conduct a set of 60-year simulations with a coupled Atmospheric GCM/biophysical model/dynamic vegetation model as well as preliminary tests with Atmospheric-Ocean GCM/ biophysical model/dynamic vegetation model, incorporating two way feedback processes, to explore the causes of Sahel climate SIDVA and to assess the relative contribution of ocean and land, including human-induced land use and land cover (LULC) change. Recently available data will be used to specify LULC change. In addition, a regional climate model (RCM) using Atmospheric GCM simulations from selected years as lateral boundary conditions will be applied to assess the regional details of surface-atmosphere interactions in the Sahel climate SIDVA. This work will test whether the RCMs will provide additional subseasonal to decadal prediction skill and if they are able to provide supplementary skillful regional information not available in coarse scale GCM predictions. This interdisciplinary research will test the hypothesis that a comprehensive understanding of West African Monsoon (WAM) SIDVA and its mechanisms requires synthesized investigation, including multi-major external forcings and their full feedbacks in the climate model. Data from satellite and field measurements, especially from African Monsoon Multidisciplinary Analyses (AMMA) project, and other sources will be applied for evaluation and specification of model simulations/predictions. Model-simulated major features and components relevant to the Sahel climate SIDVA, such as precipitation, soil moisture, vegetation condition, SST, as well as their relationship to each other will be comprehensively analyzed and compared with data from different sources. This project intends to provide a comprehensive understanding of how different earth processes and human activities have contributed to the Sahel climate variability and anomalies over much of the last century through the representation of key non-linear feedback processes in WAM climate simulations.This project has broader impacts. Understanding Sahelian climate seasonal, interannual, and decadal variability and anomaly has been recognized as a critical component in global climate studies by international programs. The distinct climate features, the strong coupling between Sahel climate and external forcings, the controversy on the causes of the Sahel climate anomalies, especially the drought, and significant social and economic implications of Sahel climate SIDVA make this region extremely important for the scientific community. This project will address some of the key scientific issues in the study of Sahelian climate and will contribute to identification of the attribution of Sahel rainfall changes to anthropogenic and natural drivers and the effect of climate variability on ecosystems and water resources. The results from this study will not only further our understanding of the Sahelian climate, but also provide useful information through regional downscaling for social planning, which is crucial for the fragile Sahelian economy. They will be distributed through the Global Energy and Water Cycle Experiment Hydroclimatology Panel (GEWEX GHP) database and the African Centre of Meteorological Application for Development (ACMAD).
萨赫勒地区从1950年代的潮湿状况到1970年代和1980年代的干旱状况,再到1990年代以来的部分恢复,这是二十世纪地球上最强烈的年代际信号之一。研究表明,萨赫勒地区的气候变化受到外部强迫的强烈影响:海表温度、陆面过程和气溶胶。 然而,大气环流模式(GCM)的研究与一个单一的外部强迫(例如,SST)没有能够再现完整的季节,年际和十年的变化和异常(SIDVA)的萨赫勒气候。 在大多数研究中,指定了SST、陆地和气溶胶条件,即,只有一种交互方式。萨赫勒气候SIDVA的外部强迫及其双向相互作用的相对作用从来没有定量和全面的研究。 该项目将利用耦合的大气GCM/生物物理模型/动态植被模型进行一系列60年模拟,并利用大气-海洋GCM/生物物理模型/动态植被模型进行初步测试,纳入双向反馈过程,以探索萨赫勒气候SIDVA的原因,并评估海洋和陆地的相对贡献,包括人类引起的土地利用和土地覆盖变化。 最近可用的数据将用于说明LULC变化。此外,还将采用一个区域气候模式,以选定年份的大气环流模式模拟作为横向边界条件,评估萨赫勒气候SIDVA中地面-大气相互作用的区域细节。这项工作将测试区域气候模式是否将提供额外的亚季节到年代际预测技能,如果他们能够提供补充熟练的区域信息,粗尺度GCM预测中没有。 这项跨学科的研究将测试的假设,全面了解西非季风(WAM)SIDVA及其机制需要综合调查,包括多个主要的外部强迫和他们的充分反馈的气候模式。来自卫星和实地测量的数据,特别是来自非洲季风多学科分析项目的数据,以及其他来源的数据将用于模型模拟/预测的评价和规格说明。将全面分析模式模拟的与萨赫勒气候SIDVA有关的主要特征和组成部分,如降水、土壤湿度、植被状况、SST以及它们之间的关系,并与不同来源的数据进行比较。该项目旨在通过WAM气候模拟中关键的非线性反馈过程,全面了解不同的地球过程和人类活动如何在上个世纪的大部分时间里促成萨赫勒气候变异和异常。了解萨赫勒地区气候的季节、年际和年代际变率和异常已被国际项目公认为全球气候研究的关键组成部分。独特的气候特征,萨赫勒气候与外部强迫之间的强烈耦合,对萨赫勒气候异常,特别是干旱的原因的争议,以及萨赫勒气候SIDVA的重大社会和经济影响,使该地区对科学界极为重要。该项目将解决萨赫勒气候研究中的一些关键科学问题,并将有助于确定萨赫勒降雨量变化的人为和自然驱动因素以及气候变异对生态系统和水资源的影响。这项研究的结果不仅将加深我们对萨赫勒气候的了解,而且还将通过区域缩小尺度为社会规划提供有用的信息,这对脆弱的萨赫勒经济至关重要。这些资料将通过全球能源和水循环实验水文气候学小组数据库和非洲气象应用促进发展中心分发。

项目成果

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Yongkang Xue其他文献

日本海底層における海水交換-日本海盆と大和海盆
日本海底的海水交换——日本盆地和大和盆地
  • DOI:
  • 发表时间:
    2011
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Tomonori Sato;Yongkang Xue;千手智晴,熊本雄一郎,張勁,田中伸一,荒巻能史
  • 通讯作者:
    千手智晴,熊本雄一郎,張勁,田中伸一,荒巻能史
Ultrasound-assisted deep eutectic solvent of neuroprotective extracts from emPaeonia lactiflora/em Pall. root: Process optimization, compositions characterization, and neuroprotective activity validation
芍药根神经保护提取物的超声辅助深共熔溶剂:工艺优化、成分表征及神经保护活性验证
  • DOI:
    10.1016/j.ultsonch.2025.107449
  • 发表时间:
    2025-09-01
  • 期刊:
  • 影响因子:
    9.700
  • 作者:
    Yongkang Xue;Zhengyu Hu;Yuxin Jiang;Man Li;Yanan Liu;Yuanqi Duan;Wei Zhou;Jinfeng Sun;Gao Li
  • 通讯作者:
    Gao Li
Near-global summer circulation response to the spring surface temperature anomaly in Tibetan Plateau –– the GEWEX/LS4P first phase experiment
  • DOI:
    10.1007/s00382-024-07210-5
  • 发表时间:
    2024-03-29
  • 期刊:
  • 影响因子:
    3.700
  • 作者:
    Yang Zhang;Yan Pan;Yongkang Xue;Ismaila Diallo;Xubin Zeng;Shuting Li;J. David Neelin;William K. M. Lau;Aaron A. Boone;Frederic Vitart;Tandong Yao;Qi Tang;Tomonori Sato;Myung-Seo Koo;Constantin Ardilouze;Subodh K. Saha;Jing Yang;Stefano Materia;Zhaohui Lin;Xin Qi;Yi Qin;Tetsu Nakamura;Paulo Nobre;Daniele Peano;Retish Senan;Yuhei Takaya;Hailan Wang;Hongliang Zhang;Yanling Zhan;Mei Zhao;Carlos R. Mechoso;Qing Bao;Marcus Jorge Bottino;Songyou Hong;Yanluan Lin;Shaocheng Xie;Xiaoduo Pan;Hara Prasad Nayak;Sin Chan Chou;Weidong Guo
  • 通讯作者:
    Weidong Guo
中国東部およびモンゴルにおける地域気候モデルの降水再現性の検証
中国东部和蒙古区域气候模式降水再现性验证
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    佐藤友徳;Yongkang Xue
  • 通讯作者:
    Yongkang Xue
Simulation of summer climate over Central Asia shows high sensitivity to different land surface schemes in WRF
  • DOI:
    10.1007/s00382-021-05876-9
  • 发表时间:
    2021-07-09
  • 期刊:
  • 影响因子:
    3.700
  • 作者:
    Sha Lu;Weidong Guo;Yongkang Xue;Fang Huang;Jun Ge
  • 通讯作者:
    Jun Ge

Yongkang Xue的其他文献

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{{ truncateString('Yongkang Xue', 18)}}的其他基金

Spring Land Surface and Subsurface Temperature Anomalies and Subsequent Downstream Late Spring-Summer Droughts/Floods in North America and East Asia
北美和东亚春季陆地表面和地下温度异常以及随后的下游春夏末干旱/洪水
  • 批准号:
    1849654
  • 财政年份:
    2019
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Standard Grant
Ea SM-3: Collaborative Res: Surface-induced Forcing and Decadal Variability and Change of the East Asian Climate, Surface Hydrology & Agriculture-A Modeling and Data Approach
Ea SM-3:协作研究:地表诱发强迫和年代际变率以及东亚气候、地表水文学的变化
  • 批准号:
    1419526
  • 财政年份:
    2014
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Standard Grant
Spring Soil Temperature Anomalies in the Western United States and Summer Droughts in the Southern Plains
美国西部春季土壤温度异常和南部平原夏季干旱
  • 批准号:
    1346813
  • 财政年份:
    2014
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Standard Grant
Surface Boundary Forcing and Sahelian Climate Variability and Anomalies
地表边界强迫和萨赫勒气候变化和异常
  • 批准号:
    0751030
  • 财政年份:
    2008
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Continuing Grant
Interactions of Land-Surface Processes and the East Asian Monsoon
陆地表面过程与东亚季风的相互作用
  • 批准号:
    0353606
  • 财政年份:
    2004
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Continuing Grant
African Regional Climate-Land Surface Interactions: Evaluated from a Coupled Atmosphere--Dynamic Vegetation Model
非洲区域气候-地表相互作用:从耦合大气-动态植被模型进行评估
  • 批准号:
    0097260
  • 财政年份:
    2001
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Continuing Grant
Changes in Sahel Land-Surface Characteristics and Climate Variation
萨赫勒地表特征变化和气候变化
  • 批准号:
    0096203
  • 财政年份:
    2000
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Continuing Grant
Changes in Sahel Land-Surface Characteristics and Climate Variation
萨赫勒地表特征变化和气候变化
  • 批准号:
    9796216
  • 财政年份:
    1997
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Continuing Grant
Changes in Sahel Land-Surface Characteristics and Climate Variation
萨赫勒地表特征变化和气候变化
  • 批准号:
    9706403
  • 财政年份:
    1997
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Continuing Grant
Changes in Sahel Land-Surface Characteristics and Climate Variation
萨赫勒地表特征变化和气候变化
  • 批准号:
    9405431
  • 财政年份:
    1994
  • 资助金额:
    $ 41.39万
  • 项目类别:
    Continuing Grant

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Understanding the Role of Mesoscale Atmosphere-Ocean Interactions in Seasonal-to-Decadal Climate Prediction
了解中尺度大气-海洋相互作用在季节到十年气候预测中的作用
  • 批准号:
    2231237
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  • 财政年份:
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北极海冰的季节到十年的可预测性
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研究季节性预测中的数十年气候变化
  • 批准号:
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Collaborative Research: P2C2--Synthesizing Asian Monsoon Hydroclimate & Indo-Pacific Variability on Seasonal to Multi-Decadal Timescales Using Tree-Rings & Coupled Climate
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    Standard Grant
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    2002083
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    2020
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    $ 41.39万
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