Abnormal Meridional Temperature Gradient and its Relation to the
The climatological meridional atmospheric temperature structure in the Okhotsk region in summer is characterized by a poleward increase of the surface air temperature. Under this anomalous tempera-ture gradient, the stationary anticyclone, referred to as the Okhotsk high, occasionally occurs. The re...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.618.6385 2023-05-15T14:59:56+02:00 Abnormal Meridional Temperature Gradient and its Relation to the Okhotsk High Yoshihiro Tachibana Takuya Iwamoto Masayo Ogi The Pennsylvania State University CiteSeerX Archives 2004 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.618.6385 http://www.jamstec.go.jp/frsgc/research/d2/masayo.ogi/82_1399.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.618.6385 http://www.jamstec.go.jp/frsgc/research/d2/masayo.ogi/82_1399.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.jamstec.go.jp/frsgc/research/d2/masayo.ogi/82_1399.pdf text 2004 ftciteseerx 2016-01-08T14:51:52Z The climatological meridional atmospheric temperature structure in the Okhotsk region in summer is characterized by a poleward increase of the surface air temperature. Under this anomalous tempera-ture gradient, the stationary anticyclone, referred to as the Okhotsk high, occasionally occurs. The rela-tionship of the interannual variation of the meridional temperature gradient anomaly is statistically investigated, with those of the Okhotsk high, the sea surface temperature, and the global atmosphere mainly using NCEP reanalysis data. The correlation between the anomaly and the Okhotsk high is quite high. That is, in years when the meridional temperature gradient is positive, the Okhotsk high appears more than normal. The anomaly is composed of two independent factors, the warmness of eastern Sibe-ria and the coldness of the northwestern North Pacific. The vertical structures of the anticyclone, related to the Siberian warmness, are different from those related to the Pacific coldness. The former anticyclone has deep structure, whereas the latter has shallow structure. Therefore, there are two types of the Okhotsk High. The warmness of Siberia is connected to the Rossby wave propagating along the northern coast of the Eurasian continent. The coldness of the North Pacific is, on the other hand, influenced by the variation of the tropical Pacific. Consequently, the interannual variation of the Okhotsk high is influenced by completely different remote sources; one is the tropical Pacific, and the other is the high-latitude areas facing the Arctic Ocean. To understand the interannual variation of the Asian summer monsoon, which is closely related to the occurrence of the Okhotsk high, both the Arctic and the tropics should be considered. 1. Text Arctic Arctic Ocean Siberia Unknown Arctic Arctic Ocean Okhotsk Pacific |
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English |
description |
The climatological meridional atmospheric temperature structure in the Okhotsk region in summer is characterized by a poleward increase of the surface air temperature. Under this anomalous tempera-ture gradient, the stationary anticyclone, referred to as the Okhotsk high, occasionally occurs. The rela-tionship of the interannual variation of the meridional temperature gradient anomaly is statistically investigated, with those of the Okhotsk high, the sea surface temperature, and the global atmosphere mainly using NCEP reanalysis data. The correlation between the anomaly and the Okhotsk high is quite high. That is, in years when the meridional temperature gradient is positive, the Okhotsk high appears more than normal. The anomaly is composed of two independent factors, the warmness of eastern Sibe-ria and the coldness of the northwestern North Pacific. The vertical structures of the anticyclone, related to the Siberian warmness, are different from those related to the Pacific coldness. The former anticyclone has deep structure, whereas the latter has shallow structure. Therefore, there are two types of the Okhotsk High. The warmness of Siberia is connected to the Rossby wave propagating along the northern coast of the Eurasian continent. The coldness of the North Pacific is, on the other hand, influenced by the variation of the tropical Pacific. Consequently, the interannual variation of the Okhotsk high is influenced by completely different remote sources; one is the tropical Pacific, and the other is the high-latitude areas facing the Arctic Ocean. To understand the interannual variation of the Asian summer monsoon, which is closely related to the occurrence of the Okhotsk high, both the Arctic and the tropics should be considered. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Okhotsk High Yoshihiro Tachibana Takuya Iwamoto Masayo Ogi |
spellingShingle |
Okhotsk High Yoshihiro Tachibana Takuya Iwamoto Masayo Ogi Abnormal Meridional Temperature Gradient and its Relation to the |
author_facet |
Okhotsk High Yoshihiro Tachibana Takuya Iwamoto Masayo Ogi |
author_sort |
Okhotsk High |
title |
Abnormal Meridional Temperature Gradient and its Relation to the |
title_short |
Abnormal Meridional Temperature Gradient and its Relation to the |
title_full |
Abnormal Meridional Temperature Gradient and its Relation to the |
title_fullStr |
Abnormal Meridional Temperature Gradient and its Relation to the |
title_full_unstemmed |
Abnormal Meridional Temperature Gradient and its Relation to the |
title_sort |
abnormal meridional temperature gradient and its relation to the |
publishDate |
2004 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.618.6385 http://www.jamstec.go.jp/frsgc/research/d2/masayo.ogi/82_1399.pdf |
geographic |
Arctic Arctic Ocean Okhotsk Pacific |
geographic_facet |
Arctic Arctic Ocean Okhotsk Pacific |
genre |
Arctic Arctic Ocean Siberia |
genre_facet |
Arctic Arctic Ocean Siberia |
op_source |
http://www.jamstec.go.jp/frsgc/research/d2/masayo.ogi/82_1399.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.618.6385 http://www.jamstec.go.jp/frsgc/research/d2/masayo.ogi/82_1399.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766332044609060864 |