Spatiotemporal changes in the size and shape of heat waves over North America

Spatiotemporal changes in the size and shape of heat waves over North America
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北美热浪大小和形状的时空变化

DOI:
10.1007/s10584-018-2140-3
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发表时间:
2018
期刊:
影响因子:
4.8
通讯作者:
Engström, Johanna
Engström, Johanna
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Keellings, David;Bunting, Erin;Engström, Johanna

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热浪在全球范围内发生的频率越来越高,并且在气候变化的情况下,热浪的强度和持续时间可能会增加。在归因观测到的热浪的原因以及对其未来发生进行建模方面已经完成了大量工作,但这些工作往往缺乏对空间关系的探索。基于景观生态学原理,我们利用碎片化指标来研究北美热浪形状和发生的时空变化。这种方法使我们能够检查面积、形状、周长和其他关键指标。将这些形状指标应用于高分辨率历史(1950-2013)气候数据表明,整个大陆热浪的总数和空间范围正在增加,但在单个热浪斑块水平上,它们的范围明显变小,形状也更加复杂,这表明热浪已成为一种更加广泛和分散的现象。
Heat waves are occurring more frequently across the globe and are likely to increase in intensity and duration under climate change. Much work has already been completed on attributing causes of observed heat waves and on modeling their future occurrence, but such efforts are often lacking in exploration of spatial relationships. Based on principles of landscape ecology, we utilized fragmentation metrics to examine the spatiotemporal changes in heat wave shape and occurrence across North America. This methodological approach enables us to examine area, shape, perimeter, and other key metrics. The application of these shape metrics to high-resolution historical (1950–2013) climate data reveals that the total number and spatial extent of heat waves are increasing over the continent, but at an individual heat wave patch level, they are becoming significantly smaller in extent and more complex in shape, indicating that heat waves have become a more widespread and fragmented phenomena.
根据区域变暖的变化(包括“变暖洞”)跟踪 20 世纪 90 年代初的区域温度预测
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影响因子: 4.8
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