Geoscience Reference
In-Depth Information
THE TROPICAL PACIFIC-INDIAN OCEAN
TEMPERATURE ANOMALY MODE AND
ITS IMPACT ON ASIAN CLIMATES
YANG HUI
∗
,
‡
and LI CHONGYIN
∗
,
†
∗
State Key Laboratory of Numerical Modeling for
Atmospheric Sciences and Geophysical Fluid Dynamics,
Institute of Atmospheric Physics, Chinese Academy of Sciences,
Beijing 100029, China
‡
yanghui@mail.iap.ac.cn
†
Meteorological College, PLA University of Science and Technology,
Nanjing 211101, China
The Indian Ocean temperature anomaly is very closely related to the Pacific
Ocean temperature anomaly through the Walker circulation and the Indonesian
through flow. So only the El Nino/Southern Oscillation (ENSO) in the Pacific
cannot entirely explain the influence of sea surface temperature anomaly
(SSTA) on climate variation. In this paper, the tropical Pacific-Indian Ocean
temperature anomaly mode (PIM) is presented from pattern and feature of
SSTA in both the Indian Ocean and the Pacific. Further, the features of
PIM and ENSO mode and their influences on the climate in China and the
rainfall in India are compared. The observation and sensitivity experiments
show that presenting PIM and studying its influence are very important for
short-range climate prediction. Furthermore, the characteristics of the Asian
climates related to the Pacific-Indian Ocean temperature anomaly mode are
investigated.
1. Introduction
The impacts of anomalous sea temperature on general circulation and
climate have attracted researchers' attention. The strong anomalous sea
surface temperature in the equatorial eastern Pacific El Nino Southern
Oscillation (ENSO) event especially causes serious flood or drought
disasters in many regions and countries around the globe and is an
important subject of many studies for many years in the world.
1
−
4
Although
ENSO is the strongest signal in the interannual climate variation, it is
not the only cause of the anomalous climate. For example, the summer
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