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The relationship between intraseason...

Wang, Xueliang.

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The relationship between intraseasonal disturbance activity and interannual variation of the tropical atmosphere.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The relationship between intraseasonal disturbance activity and interannual variation of the tropical atmosphere./
作者:	Wang, Xueliang.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 1988,
面頁冊數:	174 p.
附註:	Source: Dissertation Abstracts International, Volume: 49-11, Section: B, page: 4869.
Contained By:	Dissertation Abstracts International49-11B.
標題:	Physics, Atmospheric Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8902860

The relationship between intraseasonal disturbance activity and interannual variation of the tropical atmosphere.
Wang, Xueliang.

The relationship between intraseasonal disturbance activity and interannual variation of the tropical atmosphere. - Ann Arbor : ProQuest Dissertations & Theses, 1988 - 174 p.

Source: Dissertation Abstracts International, Volume: 49-11, Section: B, page: 4869.

Thesis (Ph.D.)--University of Hawai'i at Manoa, 1988.

The relationship between intraseasonal activity (cluster of disturbances) and interannual variation of tropical atmosphere is investigated using outgoing longwave radiation (OLR) and wind data. The space and time scale of the disturbance cluster are much larger than those of individual disturbances.Subjects--Topical Terms:

1019431
Physics, Atmospheric Science.

The relationship between intraseasonal disturbance activity and interannual variation of the tropical atmosphere.
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245 1 4 $a The relationship between intraseasonal disturbance activity and interannual variation of the tropical atmosphere.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1988
300 $a 174 p.
500 $a Source: Dissertation Abstracts International, Volume: 49-11, Section: B, page: 4869.
500 $a Chairman: Takio Murakami.
502 $a Thesis (Ph.D.)--University of Hawai'i at Manoa, 1988.
520 $a The relationship between intraseasonal activity (cluster of disturbances) and interannual variation of tropical atmosphere is investigated using outgoing longwave radiation (OLR) and wind data. The space and time scale of the disturbance cluster are much larger than those of individual disturbances.
520 $a Two constructed period bands (2-15 and 30-60 day) of disturbance activity exhibit different spatial and temporal variations on interannual time scale. The 2-15 day activity is primarily associated with interannual variations, while the 30-60 day activity is strongest over the equatorial Indian Ocean and western Pacific prior to ENSO onset. The 30-60 day oscillation is one of the triggering mechanisms for ENSO event.
520 $a The results of empirical orthogonal function analysis show that ENSO, a dominant mode of interannual variations, is essentially one realization of a bimodal climate system. ENSO onset is a phase change from non-ENSO steady state to ENSO state.
520 $a ENSO signal over the central-eastern Pacific is traceable to the western Pacific-Indian Ocean region (a warm pool). An interaction among intraseasonal activity, annual cycle, and interannual modes over the warm pool region may be instrumental in leading to ENSO onset.
520 $a The phase changes for the 1982/83 ENSO event are from the pre-ENSO in Jan. 1982, through the mid-ENSO in Jan. 1983, and to post-ENSO of Dec. 1983. Associated with this is an eastward migration of interannual OLR and zonal wind. Both the pre-ENSO and post-ENSO are representatives of anti-ENSO, an extreme of non-ENSO state.
520 $a The anti-ENSO synoptics are the manifestation of an enhancement of the characteristics of the normal winter circulation, whereas the mid-ENSO patterns reflect an unusual weakening of that. For example, over the eastern Pacific the main characteristics of the anti-ENSO phase is characterized by (1) an enhanced indirect N-S vertical overturning with less equatorial convection in contrast to heavy extratropical rainfall, (2) an intensification of upper oceanic troughs over both the North and South Pacific with prominent equatorial westerlies, and (3) substantial upper-level intraseasonal disturbances. Mid-ENSO exhibits a complete reversal of above. Those reversals also take place over the Australasian, the Indian Ocean, and Atlantic sectors.
590 $a School code: 0085.
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710 2 $a University of Hawai'i at Manoa. $3 1017511
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790 $a 0085
791 $a Ph.D.
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793 $a English
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