2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study
On the basis of an intraseasonal variability index of storm track evaluated for 40 winters (1963–64 through 2003–04) of NCEP–NCAR reanalysis data, it is found that well-defined midwinter minimum [MWMIN; (midwinter maximum MWMAX)] occurs in 21 (8) winters over the North Pacific. In contrast, MWMIN (M...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.211.511 2023-05-15T17:31:18+02:00 2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study Yi Deng Mankin Mak The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.211.511 http://www.eas.gatech.edu/files/Yi_Deng/papers/JAS-2006.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.211.511 http://www.eas.gatech.edu/files/Yi_Deng/papers/JAS-2006.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.eas.gatech.edu/files/Yi_Deng/papers/JAS-2006.pdf text 2005 ftciteseerx 2016-01-07T17:52:55Z On the basis of an intraseasonal variability index of storm track evaluated for 40 winters (1963–64 through 2003–04) of NCEP–NCAR reanalysis data, it is found that well-defined midwinter minimum [MWMIN; (midwinter maximum MWMAX)] occurs in 21 (8) winters over the North Pacific. In contrast, MWMIN (MWMAX) occurs in 4 (25) of the 40 winters over the North Atlantic. The power spectrum of such an index for the Pacific has a broad peak between 5 and 10 yr, whereas the spectrum of the index for the Atlantic has comparable power in two spectral bands: 2–2.8 and 3.5–8 yr. Over the North Pacific, the increase in the zonal asymmetry of the background baroclinicity as well as in the corresponding horizontal deformation of the time-mean jet from early/late winter to midwinter is distinctly larger in an MWMIN winter. Associated with these changes, there is a distinctly stronger barotropic damping rate in the January of an MWMIN winter. The increase in the net conversion rate of eddy kinetic energy from early/late winter to midwinter is much larger in an MWMAX winter than that in an MWMIN winter. Even though there is a modest increase in the barotropic damping from early/late winter to midwinter over the North Atlantic, it is overcompensated by a larger increase in the baroclinic conversion rate. That would result in MWMAX. These results are empirical evidences in support of a hypothesis that Text North Atlantic Unknown Broad Peak ENVELOPE(-71.231,-71.231,70.495,70.495) Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Pacific |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
On the basis of an intraseasonal variability index of storm track evaluated for 40 winters (1963–64 through 2003–04) of NCEP–NCAR reanalysis data, it is found that well-defined midwinter minimum [MWMIN; (midwinter maximum MWMAX)] occurs in 21 (8) winters over the North Pacific. In contrast, MWMIN (MWMAX) occurs in 4 (25) of the 40 winters over the North Atlantic. The power spectrum of such an index for the Pacific has a broad peak between 5 and 10 yr, whereas the spectrum of the index for the Atlantic has comparable power in two spectral bands: 2–2.8 and 3.5–8 yr. Over the North Pacific, the increase in the zonal asymmetry of the background baroclinicity as well as in the corresponding horizontal deformation of the time-mean jet from early/late winter to midwinter is distinctly larger in an MWMIN winter. Associated with these changes, there is a distinctly stronger barotropic damping rate in the January of an MWMIN winter. The increase in the net conversion rate of eddy kinetic energy from early/late winter to midwinter is much larger in an MWMAX winter than that in an MWMIN winter. Even though there is a modest increase in the barotropic damping from early/late winter to midwinter over the North Atlantic, it is overcompensated by a larger increase in the baroclinic conversion rate. That would result in MWMAX. These results are empirical evidences in support of a hypothesis that |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Yi Deng Mankin Mak |
spellingShingle |
Yi Deng Mankin Mak 2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study |
author_facet |
Yi Deng Mankin Mak |
author_sort |
Yi Deng |
title |
2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study |
title_short |
2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study |
title_full |
2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study |
title_fullStr |
2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study |
title_full_unstemmed |
2602 JOURNAL OF THE ATMOSPHERIC SCIENCES VOLUME 63 Nature of the Differences in the Intraseasonal Variability of the Pacific and Atlantic Storm Tracks: A Diagnostic Study |
title_sort |
2602 journal of the atmospheric sciences volume 63 nature of the differences in the intraseasonal variability of the pacific and atlantic storm tracks: a diagnostic study |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.211.511 http://www.eas.gatech.edu/files/Yi_Deng/papers/JAS-2006.pdf |
long_lat |
ENVELOPE(-71.231,-71.231,70.495,70.495) ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Broad Peak Midwinter Pacific |
geographic_facet |
Broad Peak Midwinter Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://www.eas.gatech.edu/files/Yi_Deng/papers/JAS-2006.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.211.511 http://www.eas.gatech.edu/files/Yi_Deng/papers/JAS-2006.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766128804765368320 |