CONNECTION OF THE SOUTH CHINA SEA SUMMER MONSOON TO MARITIME CONTINENT CONVECTION AND ENSO

GU De-jun; Tim LI; JI Zhong-ping; ZHENG Bin

Abstract:

The relationship between the intensity of the South China Sea summer monsoon (SCSSM) and the Nino3.4 index and anomalous atmospheric circulation patterns associated with a strong and weak SCSSM are investigated using the NCEP/NCAR reanalysis data, Extended Reconstructed Sea Surface Temperature (ERSST) data and Climate Prediction Center Merged Analysis of Precipitation (CMAP) data. The SCSSM is significantly positively correlated with the Nino3.4 index in the succeeding northern autumn and winter. In the strong minus weak SCSSM composite, a positive East Asia-Pacific teleconnection (EAP) pattern and a negative Europe-Asian-Pacific teleconnection (EUP) pattern appear in the 500 hPa height difference field; low-level cross-equatorial flows are strengthened over the Maritime Continent (MC) region; positive (negative) precipitation anomalies occur in the South China Sea and western north Pacific (MC). A possible mechanism through which SCSSM affects ENSO is proposed. A strong (weak) SCSSM strengthens (weakens) cross-equatorial flows over the MC. The anomalous cross-equatorial flows cool (warm) the SST around the MC through enhanced (reduced) surface latent heat fluxes. The cooling (warming) further leads to suppressed (enhanced) convection over the MC, and causes the anomalous westerly (easterly) in the equatorial western Pacific, which favors the onset of El Niño (La Niña) through modulating the positive air-sea feedback process.

Get Citation+

GU De-jun, Tim LI, JI Zhong-ping, et al. CONNECTION OF THE SOUTH CHINA SEA SUMMER MONSOON TO MARITIME CONTINENT CONVECTION AND ENSO [J]. Journal of Tropical Meteorology, 2010, 16(1): 1-9.

Export:

Article Metrics

CONNECTION OF THE SOUTH CHINA SEA SUMMER MONSOON TO MARITIME CONTINENT CONVECTION AND ENSO

Guangzhou Institute of Tropical and Marine Meteorology, and Key Open Laboratory for Tropical Monsoon, China Meteorological Administration

Abstract: The relationship between the intensity of the South China Sea summer monsoon (SCSSM) and the Nino3.4 index and anomalous atmospheric circulation patterns associated with a strong and weak SCSSM are investigated using the NCEP/NCAR reanalysis data, Extended Reconstructed Sea Surface Temperature (ERSST) data and Climate Prediction Center Merged Analysis of Precipitation (CMAP) data. The SCSSM is significantly positively correlated with the Nino3.4 index in the succeeding northern autumn and winter. In the strong minus weak SCSSM composite, a positive East Asia-Pacific teleconnection (EAP) pattern and a negative Europe-Asian-Pacific teleconnection (EUP) pattern appear in the 500 hPa height difference field; low-level cross-equatorial flows are strengthened over the Maritime Continent (MC) region; positive (negative) precipitation anomalies occur in the South China Sea and western north Pacific (MC). A possible mechanism through which SCSSM affects ENSO is proposed. A strong (weak) SCSSM strengthens (weakens) cross-equatorial flows over the MC. The anomalous cross-equatorial flows cool (warm) the SST around the MC through enhanced (reduced) surface latent heat fluxes. The cooling (warming) further leads to suppressed (enhanced) convection over the MC, and causes the anomalous westerly (easterly) in the equatorial western Pacific, which favors the onset of El Niño (La Niña) through modulating the positive air-sea feedback process.

HTML

Reference (39)

[1]	ZENG Qing-cun, LI Jian-ping. Interaction between thenorthern and southern hemispheric atmospheres and theessence of monsoon [J]. Chin. J. Atmos. Sci., 2002, 26:433-448.
[2]	YASUNARI T. Impact of Indian monsoon on the coupledatmosphere/ocean system in the tropical Pacific [J]. Meteor. & Atmos. Phys., 1990, 44: 29-41.
[3]	WEBSTER P J, YANG S. Monsoon and ENSO: selectiveinteraction system [J]. Quart. J. R. Meteor. Soc., 1992, 118:877-926.
[4]	WU Guo-xiong, MENG Wen. Gear between theIndo-monsoon circulation and the Pacific-Walker circulationand ENSO. PartⅠ: Data analyses [J]. Chin. J. Atmos. Sci.,1998, 22: 470-480.
[5]	LAU K M, WU H T. Principal Modes of rainfall-SSTvariability of the Asian summer monsoon: A reassessment ofthe monsoon-ENSO relationship [J]. J. Climate, 2001, 14:2880-2895.
[6]	LI Chong-yin, CHEN Yu-xing, YUAN Chong-guang. Animportant reason for the occurrence of El Ni?oevents―frequency activity of east winter monsoon [J]. Chin. J.Atmos. Sci., 1988, 12(special issue): 125-132.
[7]	LI Chong-yin, MU Ming-quan. Numerical simulation ofanomalous winter monsoon in East Asian exciting ENSO [J].Chin. J. Atmos. Sci., 1998, 22: 481-490.
[8]	WANG Qi, LIU Qin-yu, HU Rui-jin, et al. A possible roleof the South China Sea in ENSO cycle [J]. Acta Oceanol.Sinica, 2002, 21 (2): 217-226.
[9]	YAN Jin-yue. Climatological characteristics on the onset ofthe South China Sea southwest monsoon [J]. Acta Meteor.Sinica, 1997, 55(2): 174-186.
[10]	LIU Xia, XIE An, YE Qian, et al. The climaticcharacteristics of summer monsoon onset over South ChinaSea [J]. J. Trop. Meteor., 1998, 14: 28-37.
[11]	LI Chong-yin, ZHANG Li-ping. Summer monsoonactivities in the South China Sea and its impacts [J]. Chin. J.Atmos. Sci., 1999, 23: 257-266.
[12]	KALNAY E, et al. The NCEP/NCAR 40 year reanalysisproject [J]. Bull. Amer. Meteor. Soc., 1996, 77: 437-471.
[13]	SMITH T M, REYNOLDS R W. Improved ExtendedReconstruction of SST (1854-1997) [J]. J. Climate, 2004, 17:2466-2477.
[14]	XIE P, ARKIN P A. Analyses of Global MonthlyPrecipitation Using Gauge Observations, Satellite Estimatesand Numerical Model Predictions [J]. J. Climate, 1996, 9:840-858.
[15]	XIE P, ARKIN P A. Global Precipitation: A 17-yearmonthly analysis based on gauge observations, satelliteestimates and numerical model outputs [J]. Bull. Amer. Meteor.Soc., 1997, 78: 2539-2558.
[16]	WU Shang-sheng, LIANG Jian-yin. An index of SouthChina Sea summer monsoon intensity and its variationcharacteristics [J]. J. Trop. Meteor., 2001, 17: 337-334.
[17]	YANG S, K M LAU, KIM K M. Variations of the EastAsian jet stream and Asian-Pacific-American winter climateanomalies [J]. J. Climate, 2002, 15: 306-325.
[18]	XUE Feng, WANG Hui-jun, HE Jin-hai. Interannualvariability of Mascarene high and Australian high and theirinfluence on summer rainfall over East Asia [J]. Chin. Sci.Bull., 2003, 48: 492-497.
[19]	LIANG Jian-yin, WU Shang-sheng. The multi-time scalevariations of summer monsoon over South China Sea and itsinteraction with SST anomaly [J]. Quart. J. Appl. Meteor.,2000, 11: 95-104.
[20]	CHANG C P, ZHANG Y S, LI T. Interannual andinterdecadal variations of the East Asian summer monsoon andtropical Pacific SSTs. Part I: Role of subtropical ridges [J]. J.Climate, 2000, 13: 4310-4325.
[21]	WANG B, WU R, FU X. Pacific-East Asia teleconnection:How does ENSO affect East Asian climate? [J]. J. Climate,2000, 13: 1517-1536.
[22]	HONG C C, LI T, LINHO J S, et al. Asymmetry of theIndian Ocean Dipole. Part I: Observational analysis [J]. J.Climate, 2008, 21: 4834-4848.
[23]	HONG C C, LI T, LUO J J. Asymmetry of the IndianOcean Dipole. Part II: Model diagnosis [J]. J. Climate, 2008,21: 4849-4858.
[24]	WU Guo-xiong, CHOU Ji-fan, LIU Yi-min, et al.Dynamics of the Formation and Variation of Subtropical High[M]. Beijing: Science Press, 2002: 79-84.
[25]	MIAO Quan-sun, ZHAO Zhen-guo. The RelationshipBetween Blocking Situation of East Asia and Subtropical Highof Western Pacific and Its Impact on China Rainfall [M].Collection of papers on long-tern weather forecast. Beijing:Meteorology Press, 1990: 125-134.
[26]	HUANG Rong-hui, LI Wei-jing. The impact of summerthermal anomalies over tropical west Pacific on subtropicalhigh over East Asia and its physical mechanism [J]. Chin. J.Atmos. Sci., 1988, 12(special issue): 107-116.
[27]	WALLACE J M, GUTZLER D S. Teleconnections in thegeopotential height field during the Northern Hemispherewinter [J]. Mon. Wea. Rev., 1981: 109, 784-812.
[28]	GILL A E. Some simple solutions for heat-inducedtropical circulation [J]. Quart. J. Roy. Meteor. Soc., 1980, 106:447-462.
[29]	WEBSTER P J, MOORE A, LOSCHNIGG J, et al.Coupled ocean-atmosphere dynamics in the Indian Oceanduring 1997-98 [J]. Nature, 1999, 401: 356-360.
[30]	LI T, WANG B, CHANG C P, et al. A theory for theIndian Ocean dipole-zonal mode [J]. J. Atmos. Sci., 2003, 60:2119-2135.
[31]	WANG B, WU R, LI T. Atmosphere-warm ocean interaction and its impact on Asian-Australian monsoonvariation [J]. J. Climate, 2003, 16: 1195-1211.
[32]	KAJIKAWA Y, YASUNARI T, KAWAMURA R. The Roleof the local Hadley circulation over the western Pacific on thezonally asymmetric anomalies over the Indian Ocean [J]. J.Meteor. Soc. Japan, 2003, 81: 259-276.
[33]	LI T, ZHANG Y, LU E, et al. Relative role of dynamicand thermodynamic processes in the development of the IndianOcean dipole: An OGCM diagnosis [J]. Geophys. Res. Lett.,2002, 29 (23), 2110, doi: 10.1029/2002GL05789.
[34]	LI T, LIU P, FU X et al. Tempo-spatial structures andmechanisms of the tropospheric biennial oscillation in theIndo-Pacific warm ocean regions [J]. J. Climate, 2006, 19:3070-3087.
[35]	MEEHL G A. The annual cycle and interannualvariability in the tropical Indian and Pacific Ocean regions [J].Mon. Wea. Rev., 1987, 115: 27-50.
[36]	PHILANDER S G H, YAMAGATA T, PACANOWSKI RC. Unstable air-sea interaction in the tropics [J]. J. Atmos. Sci.,1984, 41: 604-613.
[37]	WYRTKI K. El Ni?o－the dynamic response of theequatorial Pacific Ocean to atmospheric forcing [J]. J. Phys.Oceanogr., 1975, 5: 572-584.
[38]	RASMUSSON E M, CARPENTER T H. Variations intropical sea surface temperature and surface wind fieldsassociated with the Southern Oscillation/El Ni?o [J]. Mon.Wea. Rev., 1982, 110: 354-384.
[39]	DING Yi-hui. Analysis of large scale flow pattern duringTOGA COARE IOP [J]. Acta Meteor. Sinica, 1998, 56:284-295.

CONNECTION OF THE SOUTH CHINA SEA SUMMER MONSOON TO MARITIME CONTINENT CONVECTION AND ENSO

Abstract:

References

Get Citation+

Share Article

Article Metrics

Proportional views

Manuscript History

Online:

通讯作者: 陈斌, bchen63@163.com