The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in Wintertime
Empirical orthogonal function (EOF) is applied to the study of the synoptic-scale eddies at 850 hPa over the North Pacific in winter from 1948 to 2010. The western developing pattern synoptic-scale eddies (WSE) and the eastern developing pattern synoptic-scale eddies (ESE) are extracted from the fir...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2016/4797103 |
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| author | Linlin Xia Yanke Tan Chongyin Li Cheng Cheng |
| author_facet | Linlin Xia Yanke Tan Chongyin Li Cheng Cheng |
| author_sort | Linlin Xia |
| collection | DOAJ |
| description | Empirical orthogonal function (EOF) is applied to the study of the synoptic-scale eddies at 850 hPa over the North Pacific in winter from 1948 to 2010. The western developing pattern synoptic-scale eddies (WSE) and the eastern developing pattern synoptic-scale eddies (ESE) are extracted from the first four leading modes of EOF analysis of high-pass filtered geopotential height. The results show the following: (1) The WSE and the ESE both take the form of a wave train propagating eastward. The WSE reach their largest amplitude around the dateline in the North Pacific, while the largest amplitude of ESE occurs in the northeast Pacific. (2) The WSE and ESE are the most important modes of the synoptic-scale eddies at 850 hPa over the North Pacific, which correspond to the two max value centers of the storm track. (3) In addition to geopotential height, the WSE and the ESE also leave their wave-like footprints in the temperature, meridional wind, and vertical velocity fields, which assume typical baroclinic wave features. (4) The WSE and the ESE have an intrinsic time scale of four days and experience a “midwinter suppression” corresponding to the midwinter suppression of storm tracks. |
| format | Article |
| id | doaj-art-be7d514941254861bb5daa47e6a6bfb2 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-be7d514941254861bb5daa47e6a6bfb22025-02-03T05:54:00ZengWileyAdvances in Meteorology1687-93091687-93172016-01-01201610.1155/2016/47971034797103The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in WintertimeLinlin Xia0Yanke Tan1Chongyin Li2Cheng Cheng3Meteorological and Oceanography College, PLA University of Science and Technology, Nanjing 211101, ChinaMeteorological and Oceanography College, PLA University of Science and Technology, Nanjing 211101, ChinaMeteorological and Oceanography College, PLA University of Science and Technology, Nanjing 211101, ChinaPLA, Unit 95178, Nanning 530226, ChinaEmpirical orthogonal function (EOF) is applied to the study of the synoptic-scale eddies at 850 hPa over the North Pacific in winter from 1948 to 2010. The western developing pattern synoptic-scale eddies (WSE) and the eastern developing pattern synoptic-scale eddies (ESE) are extracted from the first four leading modes of EOF analysis of high-pass filtered geopotential height. The results show the following: (1) The WSE and the ESE both take the form of a wave train propagating eastward. The WSE reach their largest amplitude around the dateline in the North Pacific, while the largest amplitude of ESE occurs in the northeast Pacific. (2) The WSE and ESE are the most important modes of the synoptic-scale eddies at 850 hPa over the North Pacific, which correspond to the two max value centers of the storm track. (3) In addition to geopotential height, the WSE and the ESE also leave their wave-like footprints in the temperature, meridional wind, and vertical velocity fields, which assume typical baroclinic wave features. (4) The WSE and the ESE have an intrinsic time scale of four days and experience a “midwinter suppression” corresponding to the midwinter suppression of storm tracks.http://dx.doi.org/10.1155/2016/4797103 |
| spellingShingle | Linlin Xia Yanke Tan Chongyin Li Cheng Cheng The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in Wintertime Advances in Meteorology |
| title | The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in Wintertime |
| title_full | The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in Wintertime |
| title_fullStr | The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in Wintertime |
| title_full_unstemmed | The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in Wintertime |
| title_short | The Classification of Synoptic-Scale Eddies at 850 hPa over the North Pacific in Wintertime |
| title_sort | classification of synoptic scale eddies at 850 hpa over the north pacific in wintertime |
| url | http://dx.doi.org/10.1155/2016/4797103 |
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