Summertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole mode
A new air–sea coupled variability of the sea surface temperature anomalies over the tropical Indian Ocean was observed and named as the tropical Indian Ocean tripole (IOT) in terms of its unique tripole pattern in recent studies, which peaks in boreal summer. This study found that the interannual va...
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| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/add60b |
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| author | Ning Meng Yang Yang Bin Zuo Yazhou Zhang Jianping Li Zhaolu Hou Ting Liu Haili Wang |
| author_facet | Ning Meng Yang Yang Bin Zuo Yazhou Zhang Jianping Li Zhaolu Hou Ting Liu Haili Wang |
| author_sort | Ning Meng |
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| description | A new air–sea coupled variability of the sea surface temperature anomalies over the tropical Indian Ocean was observed and named as the tropical Indian Ocean tripole (IOT) in terms of its unique tripole pattern in recent studies, which peaks in boreal summer. This study found that the interannual variations of the warm extremes over the Indochina Peninsula during boreal summer can be affected by the IOT. When the positive IOT events occur, two cross-equatorial airflows are induced over the eastern and western tropical Indian Ocean, reinforcing the anomalous warm-humid westerly wind over the northern Indian Ocean. The water vapor convergence is strengthened and the anomalous middle-lower level negative geopotential height is formed over the Indochina Peninsula, leading to the local enhanced ascending motion and surplus precipitation, strongly supported by both observations and numerical simulation. These circulation anomalies favor the reduction of the local surface temperatures through increasing the cloud cover and hindering the downward solar radiation, further declining the warm extremes days. Improving to understand the warm extreme variations over the Indochina Peninsula and its impact factors is of great significance for local industrial development, agricultural production and human health. |
| format | Article |
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| institution | Kabale University |
| issn | 1748-9326 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | Environmental Research Letters |
| spelling | doaj-art-7afe1fdda4dd4bb3b2fc5af6a3f7c36d2025-08-20T03:47:36ZengIOP PublishingEnvironmental Research Letters1748-93262025-01-0120606403010.1088/1748-9326/add60bSummertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole modeNing Meng0Yang Yang1Bin Zuo2Yazhou Zhang3https://orcid.org/0000-0002-6141-8684Jianping Li4https://orcid.org/0000-0003-0625-1575Zhaolu Hou5Ting Liu6Haili Wang7State Key Laboratory of Physical Oceanography (POL)/Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES)/Key Laboratory of Physical Oceanography/Academy of the Future Ocean/College of Oceanic and Atmospheric Science, Ocean University of China , Qingdao, People’s Republic of ChinaState Key Laboratory of Physical Oceanography (POL)/Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES)/Key Laboratory of Physical Oceanography/Academy of the Future Ocean/College of Oceanic and Atmospheric Science, Ocean University of China , Qingdao, People’s Republic of ChinaDalian Naval Academy , Dalian, People’s Republic of ChinaState Key Laboratory of Physical Oceanography (POL)/Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES)/Key Laboratory of Physical Oceanography/Academy of the Future Ocean/College of Oceanic and Atmospheric Science, Ocean University of China , Qingdao, People’s Republic of ChinaState Key Laboratory of Physical Oceanography (POL)/Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES)/Key Laboratory of Physical Oceanography/Academy of the Future Ocean/College of Oceanic and Atmospheric Science, Ocean University of China , Qingdao, People’s Republic of China; Laoshan Laboratory , Qingdao, People’s Republic of ChinaState Key Laboratory of Physical Oceanography (POL)/Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES)/Key Laboratory of Physical Oceanography/Academy of the Future Ocean/College of Oceanic and Atmospheric Science, Ocean University of China , Qingdao, People’s Republic of ChinaState Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou, People’s Republic of China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) , Zhuhai, People’s Republic of ChinaState Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology Chinese Academy of Sciences) , Guangzhou, People’s Republic of ChinaA new air–sea coupled variability of the sea surface temperature anomalies over the tropical Indian Ocean was observed and named as the tropical Indian Ocean tripole (IOT) in terms of its unique tripole pattern in recent studies, which peaks in boreal summer. This study found that the interannual variations of the warm extremes over the Indochina Peninsula during boreal summer can be affected by the IOT. When the positive IOT events occur, two cross-equatorial airflows are induced over the eastern and western tropical Indian Ocean, reinforcing the anomalous warm-humid westerly wind over the northern Indian Ocean. The water vapor convergence is strengthened and the anomalous middle-lower level negative geopotential height is formed over the Indochina Peninsula, leading to the local enhanced ascending motion and surplus precipitation, strongly supported by both observations and numerical simulation. These circulation anomalies favor the reduction of the local surface temperatures through increasing the cloud cover and hindering the downward solar radiation, further declining the warm extremes days. Improving to understand the warm extreme variations over the Indochina Peninsula and its impact factors is of great significance for local industrial development, agricultural production and human health.https://doi.org/10.1088/1748-9326/add60btropical Indian Ocean tripoleIndochina Peninsulawarm extremes |
| spellingShingle | Ning Meng Yang Yang Bin Zuo Yazhou Zhang Jianping Li Zhaolu Hou Ting Liu Haili Wang Summertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole mode Environmental Research Letters tropical Indian Ocean tripole Indochina Peninsula warm extremes |
| title | Summertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole mode |
| title_full | Summertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole mode |
| title_fullStr | Summertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole mode |
| title_full_unstemmed | Summertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole mode |
| title_short | Summertime warm extremes over the Indochina Peninsula linked to the tropical Indian Ocean tripole mode |
| title_sort | summertime warm extremes over the indochina peninsula linked to the tropical indian ocean tripole mode |
| topic | tropical Indian Ocean tripole Indochina Peninsula warm extremes |
| url | https://doi.org/10.1088/1748-9326/add60b |
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