Relationship between two types of heat waves in northern East Asia and temperature anomalies in Eastern Europe

Abstract In this study, the hierarchical clustering algorithm was used to cluster the summer heat waves (HWs) in northern East Asia (NEA) into wave-train HW and blocking HW. In the past 38 years, the wave-train HWs have increased significantly, while the blocking HWs have not shown a visible trend....

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Bibliographic Details
Published in:Environmental Research Letters
Main Authors: Yang, Xiaoye, Zeng, Gang, Zhang, Shiyue, Hao, Zhixin, Iyakaremye, Vedaste
Other Authors: National Key Research and Development Program of China, National Natural Science Foundation of China
Format: Article in Journal/Newspaper
Language:unknown
Published: IOP Publishing 2021
Subjects:
Barents Sea
Greenland
Online Access:http://dx.doi.org/10.1088/1748-9326/abdc8a
https://iopscience.iop.org/article/10.1088/1748-9326/abdc8a
https://iopscience.iop.org/article/10.1088/1748-9326/abdc8a/pdf
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Summary:Abstract In this study, the hierarchical clustering algorithm was used to cluster the summer heat waves (HWs) in northern East Asia (NEA) into wave-train HW and blocking HW. In the past 38 years, the wave-train HWs have increased significantly, while the blocking HWs have not shown a visible trend. The wave-train index and the blocking index are proposed to objectively identify the HW type after capturing the circulation characteristics of two kinds of HWs. When a wave-train HW occurs in NEA, simultaneous HW will occur in Eastern Europe. However, when a blocking HW occurs in NEA, a negative temperature anomaly will take place in Eastern Europe. The results of numerical simulations using the linear baroclinic model indicate that the wave-train HWs and the blocking HWs are related to the heating anomaly over southern Greenland and the cooling anomaly over the Barents Sea, respectively.

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