ENSO cycle and climate anomaly in China

Yongli Chen; Yongping Zhao; Junqiao Feng; Fan Wang

doi:10.1007/s00343-012-1245-1

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ENSO cycle and climate anomaly in China

Updated：2023-05-16

- ENSO cycle and climate anomaly in China
- Journal of Oceanology and Limnology Vol. 30, Issue 6, Pages: 985-1000(2012)
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Key Laboratory of Ocean Circulation and Waves Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-012-1245-1
  CLC：
- Online First：17 November 2012，
  
  Published：2012
- Accepted：
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Chen, Y., Zhao, Y., Feng, J. et al. ENSO cycle and climate anomaly in China., Chin. J. Ocean. Limnol. 30, 985–1000 (2012). https://doi.org/10.1007/s00343-012-1245-1
DOI：

Chen, Y., Zhao, Y., Feng, J. et al. ENSO cycle and climate anomaly in China., Chin. J. Ocean. Limnol. 30, 985–1000 (2012). https://doi.org/10.1007/s00343-012-1245-1 DOI：

摘要

Abstract

The inter-annual variability of the tropical Pacific Subsurface Ocean Temperature Anomaly (SOTA) and the associated anomalous atmospheric circulation over the Asian North Pacific during the El Niño-Southern Oscillation (ENSO) were investigated using National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) atmospheric reanalysis data and simple ocean data simulation (SODA). The relationship between the ENSO and the climate of China was revealed. The main results indicated the following: 1) there are two ENSO modes acting on the subsurface tropical Pacific. The first mode is related to the mature phase of ENSO

which mainly appears during winter. The second mode is associated with a transition stage of the ENSO developing or decaying

which mainly occurs during summer; 2) during the mature phase of El Niño

the meridionality of the atmosphere in the mid-high latitude increases

the Aleutian low and high pressure ridge over Lake Baikal strengthens

northerly winds prevail in northern China

and precipitation in northern China decreases significantly. The ridge of the Ural High strengthens during the decaying phase of El Niño

as atmospheric circulation is sustained during winter

and the northerly wind anomaly appears in northern China during summer. Due to the ascending branch of the Walker circulation over the western Pacific

the western Pacific Subtropical High becomes weaker

and south-southeasterly winds prevail over southern China. As a result

less rainfall occurs over northern China and more rainfall over the Changjiang River basin and the southwestern and eastern region of Inner Mongolia. The flood disaster that occurred south of Changjiang River can be attributed to this. The La Niña event causes an opposite

but weaker effect; 3) the ENSO cycle can influence climate anomalies within China via zonal and meridional heat transport. This is known as the “atmospheric-bridge”

where the energy anomaly within the tropical Pacific transfers to the mid-high latitude in the northern Pacific through Hadley cells and Rossby waves

and to the western Pacific-eastern Indian Ocean through Walker circulation. This research also discusses the special air-sea boundary processes during the ENSO events in the tropical Pacific

and indicates that the influence of the subsurface water of the tropical Pacific on the atmospheric circulation may be realized through the sea surface temperature anomalies of the mixed water

which contact the atmosphere and transfer the anomalous heat and moisture to the atmosphere directly. Moreover

the reason for the heavy flood within the Changjiang River during the summer of 1998 is reviewed in this paper.

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Related Institution

Yantai Institute of Costal Zone Research Chinese Academy of Sciences

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