135 0

On the Relationship between the North Pacific Climate Variability and the Central Pacific El Nino

Title
On the Relationship between the North Pacific Climate Variability and the Central Pacific El Nino
Author
예상욱
Keywords
Atmospheric circulation; ENSO; SEA-SURFACE TEMPERATURE; DIFFERENT IMPACTS; EASTERN-PACIFIC; EVENTS; CIRCULATION; OCEAN; OSCILLATION; ANOMALIES; MODOKI
Issue Date
2015-01
Publisher
AMER METEOROLOGICAL SOC
Citation
JOURNAL OF CLIMATE, v. 28, No. 2, Page. 663-677
Abstract
This study examined connections between the North Pacific climate variability and occurrence of the central Pacific (CP) El Niño for the period from 1950 to 2012. A composite analysis indicated that the relationship between the North Pacific sea surface temperature (SST), along with its overlying atmospheric circulation, and the CP El Niño during the developing and mature phases was changed when the occurrence frequency of the CP El Niño significantly increased after 1990. Empirical orthogonal function (EOF) and singular value decomposition (SVD) analyses of variability in the tropical Pacific and its relationship to the North Pacific show that the North Pacific anomalous SST and the atmospheric variability are more closely associated with the occurrence of the CP El Niño after 1990 than before 1990. There were noticeable differences in terms of the atmospheric variability conditions over the North Pacific, such as the North Pacific Oscillation (NPO)-like atmospheric variability during the spring and its associated SST anomalies during the following winter before 1990 and after 1990. In addition, combined EOF analysis also indicated that the NPO-like atmospheric circulation becomes more effective at playing a role in initiating El Niño after 1990. Consequently, such a change might have been associated with the frequent occurrence of the CP El Niño after 1990.
URI
http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-14-00137.1https://repository.hanyang.ac.kr/handle/20.500.11754/100628
ISSN
0894-8755; 1520-0442
DOI
10.1175/JCLI-D-14-00137.1
Appears in Collections:
ETC[S] > 연구정보
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE