Climate process chains: Examples from southern Africa

Climate process chains: Examples from southern Africa
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气候过程链:南部非洲的例子

DOI:
10.1002/joc.6106
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发表时间:
2019
期刊:
International Journal of Climatology
影响因子:
--
通讯作者:
Daron J
Daron J
中科院分区:
--
文献类型:
--
作者:
Daron J

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气候系统由多个组成部分组成,主要是大气、海洋和冰冻圈,每个组成部分都包含跨尺度相互作用的物理过程。为了帮助理解这个复杂系统的行为,并评估气候模型模拟,研究人员通常采取简化论的方法,专注于单个气候过程,并研究它们与不同地区的天气和气候的关系。虽然已经开发了更全面的方法,如气候网络,以明确处理气候的复杂性,但在这里,我们主张使用一种新的方法,考虑到具有社会重要性的特定气候结果的多个跨尺度过程相互作用。我们介绍和探索了“气候过程链”(CPC)的概念,并用为南部非洲确定的例子描述了它们的潜在应用。在相关理论概念的基础上,通过回顾有关气候过程和与南部非洲的遥相关的文献,我们确定了两个社会关注的结果的候选气候预测:区域范围的干旱和局部范围的暴雨。关注这样的结果意味着方案协调会的调查与气候风险管理背景更相关,并对探索区域气候不确定性提供了限制。我们认为,气候预测中心可能有助于在时间和空间尺度上阐明区域相关气候过程之间的关系,并讨论它们在气候研究中的潜在用途,包括在气候模型及其模拟的评估中。
The climate system comprises multiple components, primarily the atmosphere, ocean and cryosphere, each incorporating physical processes that interact across scales. To help understand the behaviour of this complex system, and evaluate climate model simulations, researchers typically take a reductionist approach, focusing on individual climate processes and studying their relationships with weather and climate in different regions. While more holistic approaches, such as climate networks, have been developed to explicitly address the complexity of the climate, here we argue for the use of a new approach that accounts for multiple cross‐scale process interactions, framed with respect to specific climate outcomes of societal importance. We introduce and explore the concept of “climate process chains” (CPCs), describing their potential application using examples determined for southern Africa. Building on related theoretical concepts, and through reviewing literature on climate processes and teleconnections to southern Africa, we identify candidate CPCs for two outcomes of societal interest; a regional‐scale drought and local‐scale heavy rainfall. Focusing on such outcomes means that CPC investigations have more relevance to climate risk management contexts, as well as providing a constraint on the exploration of climate uncertainties for a region. We argue that CPCs may help to articulate relationships amongst regionally relevant climate processes across temporal and spatial scales, and discuss their potential utility in climate research, including in the evaluation of climate models and their simulations.
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