Large-scale dynamics moderate impact-relevant changes to organised convective storms

Large-scale dynamics moderate impact-relevant changes to organised convective storms
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大规模动态缓和有组织对流风暴的影响相关变化

DOI:
10.1038/s43247-022-00669-2
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发表时间:
2023
影响因子:
7.9
通讯作者:
Chan S
Chan S
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Chan S

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更大的有组织的对流风暴(中尺度对流系统)可能导致欧洲发生重大洪水事件。在这里,我们评估了英国气象局和ETH-Zürich的两个对流允许气候模拟中的世纪末变化特征,这两个模拟都使用了高代表性浓度路径8.5情景,但采用不同的方法来代表全球变暖和不同模型的大气变化。英国气象局的预测表明,风暴更频繁,更小,移动速度更慢,而ETH-Zürich的预测则显示风暴更少,更大,移动速度更快。然而,这两个模拟都显示峰值降水强度,总降水量和时间聚集的增加,表明未来中尺度对流系统的风险增加。重要的是,造成洪水风险增加的最大风暴预计将增加频率和强度。这些结果突出表明,了解大规模的动力驱动因素以及风暴的物理响应对于准确预测未来气候适应所需的风暴灾害变化至关重要。
Larger organised convective storms (mesoscale-convective systems) can lead to major flood events in Europe. Here we assess end-of-century changes to their characteristics in two convection-permitting climate simulations from the UK Met Office and ETH-Zürich that both use the high Representative Concentration Pathway 8.5 scenario but different approaches to represent atmospheric changes with global warming and different models. The UK Met Office projections indicate more frequent, smaller, and slower-moving storms, while ETH-Zürich projections show fewer, larger, and faster-moving storms. However, both simulations show increases to peak precipitation intensity, total precipitation volume, and temporal clustering, suggesting increasing risks from mesoscale-convective systems in the future. Importantly, the largest storms that pose increased flood risks are projected to increase in frequency and intensity. These results highlight that understanding large-scale dynamical drivers as well as the thermodynamical response of storms is essential for accurate projections of changes to storm hazards, needed for future climate adaptation.
DOI: 10.1007/s00382-018-4114-6
发表时间: 2020-07-01
期刊: CLIMATE DYNAMICS
影响因子: 4.6
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影响因子: 4.6
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