Changes in Sahel Land-Surface Characteristics and Climate Variation
萨赫勒地表特征变化和气候变化
基本信息
- 批准号:9706403
- 负责人:
- 金额:$ 25.14万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1997
- 资助国家:美国
- 起止时间:1997-07-15 至 2000-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9706403 Xue There are two distinct hydrological phenomena in the Sahel: a persistent drought, which is very likely to have been partially caused by the land surface change, and a significant seasonal variation in the surface water balance. Simulations that couple a NCEP GCM with a biosphere model (SSiB), which has been calibrated and validated against HAPEX and SEBEX data, will be conducted to investigate influences of land-surface conditions on hydrological processes and regional climate variability in the Sahel, especially the impact of land cover on long-term Sahel drought patters. The simulations will use land property data and land cover data from field measurements and satellite observations to evaluate the integration between regional and local moisture sources in determining rainfall. The impacts of heterogeneity of vegetation distribution on land-atmosphere interactions will be explored. It will be followed by the development of a methodology to aggregate land-surface parameters to GCM grid boxes or sub-grid box. The study will focus on how land condition changes seasonal patterns in rainfall, ET, Soil water, and runoff. The results will be confirmed through comparisons with observed changing rainfall, surface temperature, and in particular, the river discharge. A river routing model will be used to convert the runoff values produced by the land surface model in each grid cell of a GCM to the basin outlet. The diagnostic analyses will be made to determine sources of Sahel precipitation, and relative contributions of each evaporation source to the rainfall and its anomalies in the Sahel. Attention will also be paid to study the impacts of land surface processes on AFJ dynamics and wave propagation. The significance of the land surface effects will be tested with respect to various patterns of land forcing anomalies, which include different degrees of land surface degradation and different percentage of vegetation cover changes in one GCM grid box.
小行星9706403 萨赫勒地区有两种截然不同的水文现象:一是持续干旱,很可能部分是由地表变化造成的;二是地表水平衡出现重大季节性变化。 将进行模拟,将国家环境评估方案的大气环流模式与生物圈模式(SSiB)结合起来,该模式已根据HAPEX和SEBEX数据进行了校准和验证,以调查地表条件对萨赫勒地区水文过程和区域气候变异的影响,特别是土地覆盖对萨赫勒地区长期干旱模式的影响。 这些模拟将利用从实地测量和卫星观测中获得的土地财产数据和土地覆盖物数据,评价在确定降雨量时区域和当地水分来源之间的综合情况。 将探讨植被分布的异质性对陆气相互作用的影响。 随后将制定一种方法,将陆面参数汇总到全球环流模式格网框或次格网框。 该研究将集中在如何土地 条件改变降雨、ET、土壤水和径流的季节性模式。将通过与观测到的降雨量、地表温度、特别是河流流量的变化进行比较来确认结果。 将使用河流路径模型将地面模型在GCM的每个网格单元中产生的径流值转换为流域出口。 将进行诊断分析,以确定萨赫勒降水的来源,以及每种蒸发源对萨赫勒降水及其异常的相对贡献。 还将注意研究陆面过程对AFJ动力学和波传播的影响。 将检验陆面效应对各种土地强迫异常模式的重要性,这些模式包括不同程度的陆面退化和一个GCM格框中不同百分比的植被覆盖变化。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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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:
$ 25.14万 - 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:
$ 25.14万 - 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:
$ 25.14万 - 项目类别:
Standard Grant
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
- 批准号:
1115506 - 财政年份:2011
- 资助金额:
$ 25.14万 - 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:
$ 25.14万 - 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:
$ 25.14万 - 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:
$ 25.14万 - 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:
$ 25.14万 - 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:
$ 25.14万 - 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:
$ 25.14万 - 项目类别:
Continuing Grant
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