The record-breaking 2022 long-lasting marine heatwaves in the East China Sea
In 2022, record-breaking long-lasting marine heatwaves (MHWs) occurred in the East China Sea (ECS), which persisted for 62 d during boreal summer. This exceeded the average MHWs duration of 10 d by a factor of 6. In addition, 2022 was also recorded as a year of many extreme events throughout Asia, s...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/acd267 |
| _version_ | 1797747341336248320 |
|---|---|
| author | Hyoeun Oh Go-Un Kim Jung-Eun Chu Keunjong Lee Jin-Yong Jeong |
| author_facet | Hyoeun Oh Go-Un Kim Jung-Eun Chu Keunjong Lee Jin-Yong Jeong |
| author_sort | Hyoeun Oh |
| collection | DOAJ |
| description | In 2022, record-breaking long-lasting marine heatwaves (MHWs) occurred in the East China Sea (ECS), which persisted for 62 d during boreal summer. This exceeded the average MHWs duration of 10 d by a factor of 6. In addition, 2022 was also recorded as a year of many extreme events throughout Asia, such as summer floods in China and Pakistan, droughts and extreme heat in Europe, raising the question of whether they were caused by a ‘triple-dip’ La Niña, which has persisted since September 2020. Here we examine the key local and remote processes that led to the 2022 MHWs in the ECS using mixed-layer heat budget analysis. During the onset of the MHWs, a salinity-stratified shallow mixed-layer due to the large river discharge from the Yangtze–Huaihe River floods in June created favorable conditions for warm ocean temperature in the ECS. Simultaneously, an anomalous anticyclone maintained by the stationary Rossby wave, which is generated by vorticity forcings in mid-latitudes and thermal forcing in Pakistan, settled in the corresponding region and led to the long-lasting MHWs until Typhoon Hinnamnor began to dissipate the wave in early September. This study improves our understanding of the physical mechanism of flood-related MHWs that have increased with recent climate change. |
| first_indexed | 2024-03-12T15:50:20Z |
| format | Article |
| id | doaj.art-e2b0319e0ee5403aa2688a939b082e04 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:50:20Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-e2b0319e0ee5403aa2688a939b082e042023-08-09T15:16:26ZengIOP PublishingEnvironmental Research Letters1748-93262023-01-0118606401510.1088/1748-9326/acd267The record-breaking 2022 long-lasting marine heatwaves in the East China SeaHyoeun Oh0Go-Un Kim1Jung-Eun Chu2Keunjong Lee3Jin-Yong Jeong4Coastal Disaster & Safety Research Department, Korea Institute of Ocean Science and Technology , Busan, Republic of KoreaCoastal Disaster & Safety Research Department, Korea Institute of Ocean Science and Technology , Busan, Republic of KoreaLow-Carbon and Climate Impact Research Centre, School of Energy and Environment, City University of Hong Kong , Hong Kong, People’s Republic of ChinaCoastal Disaster & Safety Research Department, Korea Institute of Ocean Science and Technology , Busan, Republic of KoreaCoastal Disaster & Safety Research Department, Korea Institute of Ocean Science and Technology , Busan, Republic of KoreaIn 2022, record-breaking long-lasting marine heatwaves (MHWs) occurred in the East China Sea (ECS), which persisted for 62 d during boreal summer. This exceeded the average MHWs duration of 10 d by a factor of 6. In addition, 2022 was also recorded as a year of many extreme events throughout Asia, such as summer floods in China and Pakistan, droughts and extreme heat in Europe, raising the question of whether they were caused by a ‘triple-dip’ La Niña, which has persisted since September 2020. Here we examine the key local and remote processes that led to the 2022 MHWs in the ECS using mixed-layer heat budget analysis. During the onset of the MHWs, a salinity-stratified shallow mixed-layer due to the large river discharge from the Yangtze–Huaihe River floods in June created favorable conditions for warm ocean temperature in the ECS. Simultaneously, an anomalous anticyclone maintained by the stationary Rossby wave, which is generated by vorticity forcings in mid-latitudes and thermal forcing in Pakistan, settled in the corresponding region and led to the long-lasting MHWs until Typhoon Hinnamnor began to dissipate the wave in early September. This study improves our understanding of the physical mechanism of flood-related MHWs that have increased with recent climate change.https://doi.org/10.1088/1748-9326/acd267marine heatwaveextreme eventsEast Asian summer monsoonrecord-breaking 2022 |
| spellingShingle | Hyoeun Oh Go-Un Kim Jung-Eun Chu Keunjong Lee Jin-Yong Jeong The record-breaking 2022 long-lasting marine heatwaves in the East China Sea Environmental Research Letters marine heatwave extreme events East Asian summer monsoon record-breaking 2022 |
| title | The record-breaking 2022 long-lasting marine heatwaves in the East China Sea |
| title_full | The record-breaking 2022 long-lasting marine heatwaves in the East China Sea |
| title_fullStr | The record-breaking 2022 long-lasting marine heatwaves in the East China Sea |
| title_full_unstemmed | The record-breaking 2022 long-lasting marine heatwaves in the East China Sea |
| title_short | The record-breaking 2022 long-lasting marine heatwaves in the East China Sea |
| title_sort | record breaking 2022 long lasting marine heatwaves in the east china sea |
| topic | marine heatwave extreme events East Asian summer monsoon record-breaking 2022 |
| url | https://doi.org/10.1088/1748-9326/acd267 |
| work_keys_str_mv | AT hyoeunoh therecordbreaking2022longlastingmarineheatwavesintheeastchinasea AT gounkim therecordbreaking2022longlastingmarineheatwavesintheeastchinasea AT jungeunchu therecordbreaking2022longlastingmarineheatwavesintheeastchinasea AT keunjonglee therecordbreaking2022longlastingmarineheatwavesintheeastchinasea AT jinyongjeong therecordbreaking2022longlastingmarineheatwavesintheeastchinasea AT hyoeunoh recordbreaking2022longlastingmarineheatwavesintheeastchinasea AT gounkim recordbreaking2022longlastingmarineheatwavesintheeastchinasea AT jungeunchu recordbreaking2022longlastingmarineheatwavesintheeastchinasea AT keunjonglee recordbreaking2022longlastingmarineheatwavesintheeastchinasea AT jinyongjeong recordbreaking2022longlastingmarineheatwavesintheeastchinasea |