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

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-...

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Bibliographic Details
Published in:Environmental Research Letters
Main Authors: Xiaoye Yang, Gang Zeng, Shiyue Zhang, Zhixin Hao, Vedaste Iyakaremye
Format: Article in Journal/Newspaper
Language:English
Published: IOP Publishing 2021
Subjects:
heat wave
clustering
Northern East Asia
Eastern Europe
linear baroclinic model
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
Science
Q
Physics
QC1-999
Barents Sea
Greenland
Online Access:https://doi.org/10.1088/1748-9326/abdc8a
https://doaj.org/article/169ba0372c0c49ea88ce10b9bf749cce
Description
Summary: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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