Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm track
Based on the daily reanalysis, the present study examines the interannual influences of the European blocking (EB) and Greenland blocking (GB) frequencies on the winter North Atlantic storm track (WNAST) intensity. There are contrasting relationships between the two types of atmospheric blockings an...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/ac2934 |
| _version_ | 1797747495132987392 |
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| author | Minghao Yang Dehai Luo Weilai Shi Yao Yao Xin Li Xiong Chen |
| author_facet | Minghao Yang Dehai Luo Weilai Shi Yao Yao Xin Li Xiong Chen |
| author_sort | Minghao Yang |
| collection | DOAJ |
| description | Based on the daily reanalysis, the present study examines the interannual influences of the European blocking (EB) and Greenland blocking (GB) frequencies on the winter North Atlantic storm track (WNAST) intensity. There are contrasting relationships between the two types of atmospheric blockings and the WNAST. The EB and GB frequencies are significantly positively and negatively related to the WNAST intensity, respectively. Composite analysis shows a meridional dipole of the WNAST anomalies associated with both frequent EB and GB. The area of EB-related positive WNAST anomalies is obviously larger than that of the negative anomalies, which directly results in their in-phase relationship. However, the amplitudes of the GB-related negative WNAST anomalies that are larger than those of the positive anomalies directly lead to their out-of-phase relationship. The EB-related intensified WNAST is dependent on the enhanced baroclinic energy conversion and the strengthened atmospheric baroclinicity induced by the anomalous westerly winds on the northern side of the EB-related anticyclone. In contrast, the GB-related weakened WNAST is determined by the attenuated atmospheric baroclinicity and baroclinic energy conversion on the southern flank of the WNAST climatology. |
| first_indexed | 2024-03-12T15:52:22Z |
| format | Article |
| id | doaj.art-f98daa54bf4549dd97067776a859914c |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:52:22Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-f98daa54bf4549dd97067776a859914c2023-08-09T15:07:13ZengIOP PublishingEnvironmental Research Letters1748-93262021-01-01161010403610.1088/1748-9326/ac2934Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm trackMinghao Yang0https://orcid.org/0000-0003-1298-2307Dehai Luo1https://orcid.org/0000-0001-8834-8623Weilai Shi2Yao Yao3Xin Li4Xiong Chen5https://orcid.org/0000-0003-0067-8420College of Meteorology and Oceanography, National University of Defense Technology , Changsha, People’s Republic of China; Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Science , Beijing, People’s Republic of ChinaKey Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Science , Beijing, People’s Republic of ChinaCollege of Meteorology and Oceanography, National University of Defense Technology , Changsha, People’s Republic of ChinaKey Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Science , Beijing, People’s Republic of ChinaCollege of Meteorology and Oceanography, National University of Defense Technology , Changsha, People’s Republic of ChinaCollege of Meteorology and Oceanography, National University of Defense Technology , Changsha, People’s Republic of ChinaBased on the daily reanalysis, the present study examines the interannual influences of the European blocking (EB) and Greenland blocking (GB) frequencies on the winter North Atlantic storm track (WNAST) intensity. There are contrasting relationships between the two types of atmospheric blockings and the WNAST. The EB and GB frequencies are significantly positively and negatively related to the WNAST intensity, respectively. Composite analysis shows a meridional dipole of the WNAST anomalies associated with both frequent EB and GB. The area of EB-related positive WNAST anomalies is obviously larger than that of the negative anomalies, which directly results in their in-phase relationship. However, the amplitudes of the GB-related negative WNAST anomalies that are larger than those of the positive anomalies directly lead to their out-of-phase relationship. The EB-related intensified WNAST is dependent on the enhanced baroclinic energy conversion and the strengthened atmospheric baroclinicity induced by the anomalous westerly winds on the northern side of the EB-related anticyclone. In contrast, the GB-related weakened WNAST is determined by the attenuated atmospheric baroclinicity and baroclinic energy conversion on the southern flank of the WNAST climatology.https://doi.org/10.1088/1748-9326/ac2934European blockingGreenland blockingNorth Atlantic storm trackinterannual relationship |
| spellingShingle | Minghao Yang Dehai Luo Weilai Shi Yao Yao Xin Li Xiong Chen Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm track Environmental Research Letters European blocking Greenland blocking North Atlantic storm track interannual relationship |
| title | Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm track |
| title_full | Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm track |
| title_fullStr | Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm track |
| title_full_unstemmed | Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm track |
| title_short | Contrasting interannual impacts of European and Greenland blockings on the winter North Atlantic storm track |
| title_sort | contrasting interannual impacts of european and greenland blockings on the winter north atlantic storm track |
| topic | European blocking Greenland blocking North Atlantic storm track interannual relationship |
| url | https://doi.org/10.1088/1748-9326/ac2934 |
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