Collaborative Research: Understanding Change in the Climate and Hydrology of the Arctic Land Region: Synthesizing the Results of the ARCSS Fresh Water Initiative Projects
合作研究:了解北极陆地区域气候和水文的变化:综合 ARCSS 淡水倡议项目的结果
基本信息
- 批准号:0849359
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2008
- 资助国家:美国
- 起止时间:2008-06-30 至 2010-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The climate of the Arctic is changing. According to the Arctic Climate Impact Assessment (ACIA), "Arctic climate is now warming rapidly, and much larger changes are projected". These changes are of concern because of their possible implications for global ocean circulation. The ARCSS Freshwater Integration Study (FWI) was designed to address the scientific basis of many of these broader issues that are related to the arctic freshwater cycle, especially over land. In particular, FWI has the objective of addressing "... key, unresolved issues ... [that are] fundamentally cross-disciplinary and synthetic in nature". Three of these issues deal directly with the coupled implications of arctic climate and the water and energy balances of the region. NSF funded a group of 18 FWI projects in 2002, which together with subsequent ARCSS projects were intended to address the FWI questions outlined above. However there is a need for synthesis activities to exploit more fully results of the FWI projects. This work will utilize research results from the FWI projects that have a substantial land surface activity, and will incorporate the results in a synthesis activity that will document and attribute observed change in the arctic hydrologic cycle, both for the climate of the region, and the global climate system. The primary synthesis mechanism will be a coupled regional land-atmosphere model (either polar WRF or MM5), and (more limited use) of a global model of medium complexity of the ocean-land-atmosphere system. The overarching science question to be addressed is: How do changes in arctic land processes affect the climate of the region, what are the implications of these changes for the arctic hydrologic cycle (including coupling and feedbacks with the atmosphere), and what are the impacts of changes in the arctic freshwater system on global climate?The research will address two supporting science questions: 1) How can the results from the FWI studies be used to better understand the hydrologic processes affecting observed change in the freshwater balance of the pan arctic land system? and 2) To what extent are the observed changes in Arctic terrestrial hydrologic cycle due to imported change from other regions (via atmospheric processes), and to what extent are the observed terrestrial hydrologic changes exported to the atmosphere and to the global ocean system? The first question leads to attribution questions regarding which hydrologic processes have contributed to observed change, and will be addressed using a strategy of uncoupled, partially coupled, and fully coupled land-atmosphere modeling at the pan-arctic scale. Addressing the second question will require documenting the effect of hydrologic change on global climate (via changes in the oceans). It will be addressed through use of a coupled GLOBAL land-ocean-atmosphere model of medium complexity (University of Victoria ESCM climate model).To date our understanding of change in the Arctic region and its broader role in global climate has been limited. This research seeks to provide a comprehensive view of key hydrological processes within the Arctic system and how they interact regionally and with the global system via oceanic and atmospheric pathways. It is expected that this will result in a better understanding of how hydrologic processes have contributed to observed change and the contribution from extra-Arctic processes. Detailed analysis of these interactions and feedbacks will provide valuable information to the climate community for understanding the role of the Arctic in climate variability and change.
北极的气候正在发生变化。根据北极气候影响评估,“北极气候现在正在迅速变暖,预计会发生更大的变化”。这些变化令人关切,因为它们可能对全球海洋环流产生影响。北极科学系统淡水综合研究(FWI)旨在解决许多与北极淡水循环有关的更广泛问题的科学基础,特别是在陆地上。特别是,FWI的目标是解决“.关键的悬而未决的问题[that基本上是跨学科和综合性的”。其中三个问题直接涉及北极气候与该地区水和能源平衡的耦合影响。2002年,国家科学基金会资助了一组18个FWI项目,这些项目与随后的ARCSS项目一起,旨在解决上述FWI问题。然而,需要开展综合活动,以更充分地利用FWI项目的成果。这项工作将利用FWI项目的研究结果,这些项目具有大量的陆地表面活动,并将这些结果纳入一项综合活动,该活动将记录和说明北极水文循环中观测到的变化,包括该地区的气候和全球气候系统。主要的合成机制将是一个耦合的区域陆地-大气模式(极地WRF或MM 5),以及(更有限的使用)海洋-陆地-大气系统中等复杂性的全球模式。要解决的首要科学问题是:北极陆地过程的变化如何影响该地区的气候,这些变化对北极水文循环(包括与大气的耦合和反馈)的影响是什么,以及北极淡水系统的变化对全球气候的影响是什么?该研究将解决两个支持科学问题:1)FWI研究的结果如何用于更好地了解影响泛北极陆地系统淡水平衡变化的水文过程?(2)观测到的北极陆地水文循环变化在多大程度上是由于从其他区域(通过大气过程)输入的变化,以及观测到的陆地水文变化在多大程度上输出到大气和全球海洋系统?第一个问题导致归属问题,水文过程有助于观察到的变化,并将使用一个战略来解决解耦,部分耦合,完全耦合的陆地-大气模型在泛北极尺度。解决第二个问题需要记录水文变化对全球气候的影响(通过海洋的变化)。将通过使用一个中等复杂性的全球陆地-海洋-大气耦合模式(维多利亚大学ESCM气候模式)来解决这一问题。这项研究旨在全面了解北极系统内的关键水文过程,以及它们如何通过海洋和大气途径在区域和与全球系统相互作用。预计这将使人们更好地了解水文过程如何促进观测到的变化以及北极以外过程的作用。对这些相互作用和反馈的详细分析将为气候界了解北极在气候变率和变化中的作用提供有价值的信息。
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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Charles Vorosmarty其他文献
Charles Vorosmarty的其他文献
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