Interannual Variation of the Onset of Yunnan’s Rainy Season and Its Relationships with the Arctic Oscillation of the Preceding Winter — Oak Academic Publishing
Research ArticleOpen AccessGoogle Scholar indexed
Interannual Variation of the Onset of Yunnan’s Rainy Season and Its Relationships with the Arctic Oscillation of the Preceding Winter
Yunnan Institute of Meteorological Sciences, Kunming, China
,
Department of Atmospheric Sciences, Yunnan University, Kunming, China
,
Yunnan Climate Center, Kunming, China
,
Yunnan Institute of Meteorological Sciences, Kunming, China
,
Yunnan Institute of Meteorological Sciences, Kunming, China
1 Yunnan Institute of Meteorological Sciences, Kunming, China
2 Department of Atmospheric Sciences, Yunnan University, Kunming, China
3 Yunnan Climate Center, Kunming, China
4 Yunnan Institute of Meteorological Sciences, Kunming, China
5 Yunnan Institute of Meteorological Sciences, Kunming, China
Based on an analysis of the circulation in May associated with the interannual variation of the onset of Yunnan’s rainy season, this study examined the rela-tionship between Arctic Oscillation (AO) and the onset timing of the rainy sea-son by using the NCEP/NCAR reanalysis and observational precipitation data for 1961-2010. The results indicated that, on an interannual time scale, intense Asian summer monsoon and an active EU-pattern wave train circulation in its positive phase, associated with a cold cyclonic cell covering the western part of the East Asian subtropical westerly jet (EASWJ), jointly contributed to the onset of the rainy season in May. Otherwise, the onset might be suppressed. The cold cyclonic cell over East Asia likely led to the southward shift and enhancement of EASWJ as well as its secondary circulation around the jet entrance, which could provide a favorable dynamic and thermal condition for rainfalls in Yunnan as was revealed in previous studies on 10 - 30-day time scale. Further examination showed that the preceding wintertime AO played a significant role in the timing of the onset of the rainy season before the mid-1980s’ by mostly modulating the wave-train-like circulation over East Asia in May. During that time period, when the AO index of the previous winter was positive (negative), Yunnan’s rainy season tended to begin earlier (later) than normal. Correspond-ingly, the precipitation in May was also closely linked to wintertime AO.
KeywordsOnset of Yunnan’s Rainy SeasonEast Asian Subtropical Westerly Jet (EASWJ)Arctic Oscillation (AO)Interannual Variation
Chen, Y., Ding, Y.H. and Xiao, Z.N. (2006) The Impact of Water Vapor Transport on the Summer Monsoon Onset and Abnormal Rainfall over Yunnan Province in May. Chinese Journal of Atmospheric Sciences, 30, 272-286.
Duan, X. and Tao, Y. (2012) The Climate Change of Yunnan over the Last 50 Years. Journal of Tropical Meteorology, 28, 243-250.
Zhang, W.C., Zheng, J.M. and Ren, J.Z. (2013) Climate Characteristics of Extreme Drought Events in Yunnan. Journal of Catastrophology, 28, 59-64.
Wang, L., Chen, W., Zhou, W. and Huang, G. (2015) Drought in Southwest China: A Review. Atmosphere and Oceanic Science Letters, 8, 339-344.
Wang, B. and Lin, H. (2002) Rainy Season of the Asian-Pacific Summer Monsoon. Journal of Climate, 15, 386-398. https://doi.org/10.1175/1520-0442(2002)015 2.0.CO;2
Cao, J., Hu, J.M. and Tao, Y. (2012) An Index for the Interface between the Indian Summer Monsoon and the East Asian Summer Monsoon. Journal of Geophysical Research, 117, D18108. https://doi.org/10.1029/2012JD017841
Zhao, E.X., Lv, J.M. and Ju, J.H. (2006) Impacts of Onset of Summer Monsoon over Southeast Asia on the Rainy Season in Yunnan. Journal of Tropical Meteorology, 22, 209-216.
Liu, Y., Zhao, E.X., Sun, D., et al. (2006) The Influence of Abnormal East Asian Summer Monsoon on 2005 Early-Summer Drought in Yunnan. Meteor Mon, 32, 91-96.
Liu, Y., Huang, W., Tao, Y., et al. (2007) Relationship between the Rainy Season Onset Yunnan and Tropical OLR. Plateau Meteorology, 26, 409-413.
Liang, H.L., Xu, M.L., Lv, A.M., et al. (2014) Preliminary Study on Heavy Rainfall in Yunnan in Early Summer Initiated by Bengal Bay Storm. Plateau Meteorology, 33, 1240-1250.
Li, T., Yan, X. and Ju, J.H. (2012) Impact of MJO Activities on Precipitation in May over Yunnan. Chinese Journal of Atmospheric Sciences, 36, 1101-1111.
Qi, M.H., Niu, F.B., Yan, X., et al. (2013) Extend Range Forecast of the Begging of Rainy Season in Yunnan by Studying the MJO Action Regularity. Advances in Meteorological Science and Technology, 3, 57-63.
Chen, Y.X. and Zhu, B.Z. (1985) The Synoptic Features of Rain Season in Yunnan Province before Outbreak of Tropical Monsoon. Scientia Atmospherica Sinica, 9, 101-106.
Liu, Y., Zhao, E.X., Yang, S.Q., et al. (2007) Diagnoses of the Severe Drought over Yunnan Area in the Early Summer Monsoon of 2005. Journal of Tropical Meteorology, 13, 93-96.
Chen, Y. (2012) The Influence of Subtropical Westerly Jet on the Onset of Rainy Season over Yunnan Province. Advances in Meteorological Science and Technology, 2, 27-31.
Chen, Y., Ding, Y.H., Tao, Y., Zhang, W.C. and Liu, Y. (2015) The Variation of the East Asian Subtropical Westerly Jet and Cold Air Activities During Yunnan Rainy Season Onset. Journal of Tropical Meteorology, 31, 577-587.
Thompson, D.W.J. and Wallace, J.M. (1998) The Arctic Oscillation Signature in the Wintertime Geopotential Height and Temperature Fields. Geophysical Research Letters, 25, 1297-1300. https://doi.org/10.1029/98GL00950
Gong, D.Y. and Chang, H.H. (2003) Arctic Oscillation Signals in the East Asian Summer Monsoon. Journal of Geophysical Research, 108, 4066. https://doi.org/10.1029/2002JD002193
Ju, J.H., Ren, J.Z. and Lv, J.M. (2004) Effect of Interdecadal Variation of Arctic Oscillation on Temperature Increasing in North of East Asian Winter. Plateau Meteorology, 23, 429-434.
Gong, D.Y., Zhu, J.H. and Wang, S.W. (2002) Significant Correlation between the Precipitation in Summer over Changjiang Valley and the Preceding Arctic Oscillation. Chinese Science Bulletin, 47, 546-549.
Wu, B.Y. and Wang, J. (2003) Possible Impacts of Winter Artic Oscillation on Siberian High, the East Asian Winter Monsoon and Sea-Ice Extent. Advances in Atmospheric Sciences, 19, 297-320.
Chen, W. and Kang, L.H. (2006) Linkage between the Arctic Oscillation and Winter Climate over East Asia on the Interannual Timescale: Role of Quasi-Stationary Planetary Waves. Chinese Journal Atmospheric Sciences, 30, 863-870.
Yang, H. and Li, C.Y. (2008) Influence of Arctic Oscillation on Temperature and Precipitation in Winter. Climatic and Environmental Research, 13, 395-404.
Yang, H. (2011) The Significant Relationship between the Arctic Oscillation (AO) in December and the January Climate over South China. Advances in Atmospheric Sciences, 28, 398-407. https://doi.org/10.1007/s00376-010-0019-y
Ju, J.H., Lv, J.M., Xie, G.Q., et al. (2012) Studies on the Influences of Persistent Anomalies of MJO and AO on Drought Appeared in Yunnan. Journal of Arid Meteorology, 29, 401-406. (In Chinese)
Zheng, J.M., Zhang, W.C., Wan, Y.X., et al. (2013) Comparative Analysis on Abnormal Circulation in Spring in Extreme Drought Year of Yunnan. Plateau Meteorology, 32, 1665-1672.
Kalnay, E., Kanamitus, M., Kistler, R., et al. (1996) The NCEP/NCAR 40-Year Reanalysis Project. Bulletin of the American Meteorological Society, 77, 437-471. https://doi.org/10.1175/1520-0477(1996)077 2.0.CO;2
Duan, X., Tao, Y. and Duan, C.C. (2011) A Fine Mesh Climate Division and the Selecting of Climate Represent Stations of Yunnan. Journal of Nanjing Institute of Meteorology, 34, 336-342.
Liu, Y. (2000) The Climatic Feature Analysis of Yunnan Rainy Season Early or Late Onset. Meteorological Monthly, 26, 45-49.
Tao, Z.Y. and Zheng, Y.G. (2012) Analysis Methods on Potential Temperature, Isentropic Potential Vorticity, Front and Tropopause. Meteorological Monthly, 38, 17-27.
Murakami, T. and Ding, Y.H. (1982) Wind and Temperature Changes over Eurasia during the Early Summer of 1979. Journal of the Meteorological Society of Japan, 60, 183-196.
Webster, P.J. and Yang, S. (1992) Monsoon and ENSO: Selectively Interactive Systems. Quarterly Journal of the Royal Meteorological Society, 118, 877-926. https://doi.org/10.1002/qj.49711850705
Tao, Y., Zheng, J.M., Wan, Y.X., et al. (2006) Evolution Feature of the Rainy Season Onset Time of Yunnan Province. Climatic and Environmental Research, 11, 229-235.