Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern Hemisphere

Abstract Humid heatwaves negatively affect human health due to the integrating effect of temperature and humidity, and thus the early warning and timely mitigating on climate extremes are essential. Yet, systematic assessment on the intra‐annual onset and end of humid heatwaves, which is associated...

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Main Authors: Jianquan Dong, Stefan Brönnimann, Tao Hu, Xueyan Cheng, Yanxu Liu, Jian Peng
Format: Article
Language:English
Published: Wiley 2024-11-01
Series:Earth's Future
Subjects:
Online Access:https://doi.org/10.1029/2024EF005163
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author Jianquan Dong
Stefan Brönnimann
Tao Hu
Xueyan Cheng
Yanxu Liu
Jian Peng
author_facet Jianquan Dong
Stefan Brönnimann
Tao Hu
Xueyan Cheng
Yanxu Liu
Jian Peng
author_sort Jianquan Dong
collection DOAJ
description Abstract Humid heatwaves negatively affect human health due to the integrating effect of temperature and humidity, and thus the early warning and timely mitigating on climate extremes are essential. Yet, systematic assessment on the intra‐annual onset and end of humid heatwaves, which is associated to the occurrence of first and last humid heatwaves, are missing globally. Using a new station‐based data set of daily maximum wet‐bulb temperature, the start and end dates, cumulative anomaly and extremely humid heat of the first and last humid heatwaves in the Northern Hemisphere were explored. It was found that at 91.54% of stations, humid heatwaves started earlier or ended later in the period of 2001–2020 compared to 1981–2000. High cumulative anomalies of the first or last humid heatwaves were found in the mid‐ and high‐latitude regions. Average difference between all humid heatwaves and the first humid heatwaves in cumulative anomalies increased steadily at stations north of 35°N. At regional scales, South East Asia had become the most prominent area with intensification of intra‐annual onset and end of humid heatwaves and will experience more frequent extreme events by 2100. Our findings demonstrated more intensified characteristics of the intra‐annual onset and end of humid heatwaves, calling for global awareness.
format Article
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institution Kabale University
issn 2328-4277
language English
publishDate 2024-11-01
publisher Wiley
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series Earth's Future
spelling doaj-art-6ec3813b2cb74b7ab71a3d42a8f342102024-12-10T08:50:40ZengWileyEarth's Future2328-42772024-11-011211n/an/a10.1029/2024EF005163Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern HemisphereJianquan Dong0Stefan Brönnimann1Tao Hu2Xueyan Cheng3Yanxu Liu4Jian Peng5School of Landscape Architecture Beijing Forestry University Beijing ChinaOeschger Centre for Climate Change Research Institute of Geography University of Bern Bern SwitzerlandLaboratory for Earth Surface Processes, Ministry of Education College of Urban and Environmental Sciences Peking University Beijing ChinaLaboratory for Earth Surface Processes, Ministry of Education College of Urban and Environmental Sciences Peking University Beijing ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical Science Beijing Normal University Beijing ChinaLaboratory for Earth Surface Processes, Ministry of Education College of Urban and Environmental Sciences Peking University Beijing ChinaAbstract Humid heatwaves negatively affect human health due to the integrating effect of temperature and humidity, and thus the early warning and timely mitigating on climate extremes are essential. Yet, systematic assessment on the intra‐annual onset and end of humid heatwaves, which is associated to the occurrence of first and last humid heatwaves, are missing globally. Using a new station‐based data set of daily maximum wet‐bulb temperature, the start and end dates, cumulative anomaly and extremely humid heat of the first and last humid heatwaves in the Northern Hemisphere were explored. It was found that at 91.54% of stations, humid heatwaves started earlier or ended later in the period of 2001–2020 compared to 1981–2000. High cumulative anomalies of the first or last humid heatwaves were found in the mid‐ and high‐latitude regions. Average difference between all humid heatwaves and the first humid heatwaves in cumulative anomalies increased steadily at stations north of 35°N. At regional scales, South East Asia had become the most prominent area with intensification of intra‐annual onset and end of humid heatwaves and will experience more frequent extreme events by 2100. Our findings demonstrated more intensified characteristics of the intra‐annual onset and end of humid heatwaves, calling for global awareness.https://doi.org/10.1029/2024EF005163humid heatheatwaveextreme heat
spellingShingle Jianquan Dong
Stefan Brönnimann
Tao Hu
Xueyan Cheng
Yanxu Liu
Jian Peng
Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern Hemisphere
Earth's Future
humid heat
heatwave
extreme heat
title Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern Hemisphere
title_full Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern Hemisphere
title_fullStr Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern Hemisphere
title_full_unstemmed Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern Hemisphere
title_short Trends of the Intra‐Annual Onset and End of Humid Heatwaves in the Northern Hemisphere
title_sort trends of the intra annual onset and end of humid heatwaves in the northern hemisphere
topic humid heat
heatwave
extreme heat
url https://doi.org/10.1029/2024EF005163
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AT xueyancheng trendsoftheintraannualonsetandendofhumidheatwavesinthenorthernhemisphere
AT yanxuliu trendsoftheintraannualonsetandendofhumidheatwavesinthenorthernhemisphere
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