全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
大气科学  2013 

高频瞬变涡动反馈强迫对东亚/太平洋事件演变过程的作用

DOI: 10.3878/j.issn.1006-9895.2013.12147

Keywords: EAP,高频瞬变涡动,反馈强迫

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文通过位势倾向方程研究了高频瞬变涡动反馈强迫(TEFF)对东亚/太平洋型在低频时间尺度上(8天以上)的演变过程(EAP事件)的影响。一个重要的发现是,无论正位相还是负位相的EAP事件,在对流层中低层上,TEFF对其中、高纬度两个异常中心的演变均起着重要的作用。尤其是高纬度中心,在对流层中层,TEFF异常在盛期前可解释其增强部分的50%左右;盛期之后则起着减缓其减弱的作用。TEFF异常可分解为由高频涡动热量通量的辐合辐散引起的TEFFheat异常和高频涡动涡度通量引起的TEFFvor异常。两者在对流层上层相互抵消、下层相互叠加,导致TEFF异常在对流层上层(低层)的作用要弱(强)于对流层中层。就TEFFheat和TEFFvor的相对贡献而言,正位相的EAP事件中,TEFFvor的贡献较大;但在负位相EAP事件中,TEFFheat的贡献则增大至与TEFFvor相当的程度。这种TEFFheat作用在负事件中的增强可能是与贝加尔湖以东地区对流层低层上斜压性的加强有关。

References

[1]  Kaylor R E. 1977. Filtering and decimation of digital time series[R]. Tech. Rep. Note BN 850, 14 pp. (Available from Engineering and Physical Science Library, University of Maryland at College Park, College Park, MD 20740.)
[2]  Kosaka Y, Nakamura H. 2006. Structure and dynamics of the summertime Pacific-Japan (PJ) teleconnection pattern[J]. Quart. J. Roy. Meteor. Soc., 132 (619): 2009-2030.
[3]  Lau N C, Holopainen E O. 1984. Transient eddy forcing of the time-mean flow as identified by geopotential tendencies[J]. J. Atmos. Sci., 41 (3): 313-328.
[4]  Lau N C, Nath M J. 1991. Variability of the baroclinic and barotropic transient eddy forcing associated with monthly changes in the midlatitude storm tracks[J]. J. Atmos. Sci., 48 (24): 2589-2613.
[5]  Li S, Robinson W A, Hoerling M P, et al. 2007. Dynamics of the extratropical response to a tropical Atlantic SST anomaly[J]. J. Climate, 20 (3): 560-574.
[6]  Lu R, Huang R. 1996. Numerical simulation of the effect of the SST anomalies in the tropical western Pacific on the blocking highs over the northeastern Asia[J]. Adv. Atmos. Sci., 13 (4): 411-424.
[7]  Lu R Y, Lin Z D. 2009. Role of subtropical precipitation anomalies in maintaining the summertime meridional teleconnection over the western North Pacific and East Asia[J]. J. Climate, 22 (8): 2058-2072.
[8]  Nakamura H, Nakamura M, Anderson J L. 1997. The role of high-and low-frequency dynamics in blocking formation[J]. Mon. Wea. Rev., 125 (9): 2074-2093.
[9]  Nakamura H, Fukamachi T. 2004. Evolution and dynamics of summertime blocking over the Far East and the associated surface Okhotsk high[J]. Quart. J. Roy. Meteor. Soc., 130 (599): 1213-1233.
[10]  Nitta T. 1987. Convective activities in the tropical western Pacific and their impact on the Northern Hemisphere summer circulation[J]. J. Meteor. Soc. Japan, 65 (3): 373-390.
[11]  Peng S, Robinson W A, Li S L. 2003. Mechanisms for the NAO responses to the North Atlantic SST tripole[J]. J. Climate, 16 (12): 1987-2004.
[12]  Shi N, Bueh C, Ji L, et al. 2009. The impact of mid-and high-latitude Rossby wave activities on the medium-range evolution of the EAP pattern during the pre-rainy period of South China[J]. Acta Meteor. Sin., 23 (3): 300-314.
[13]  施宁, 布和朝鲁, 纪立人, 等. 2009. 中高纬Rossby波活动对盛夏东亚/太平洋事件中期演变过程的影响[J]. 大气科学, 33 (5): 1087-1100. Shi Ning, Bueh Cholaw, Ji Liren, et al. 2009. Impacts of mid-and high-latitude Rossby wave activities on the medium-range evolution of East Asia/Pacific events during the mid-and late summer[J]. Chinese Journal of Atmospheric Sciences (in Chinese), 33 (5): 1087-1100.
[14]  孙颖,丁-汇. 2003.1999.年东亚夏季风异常活动的物理机制研究[J].气象学报,61(4): 406-420. Sun Y,Ding Y H. 2003. A study of physical mechanisms of anomalous activities of East Asian summer monsoon during 1999[J]. Acta Meteorologica Sinica (in Chinese),61(4): 406-420.
[15]  王亚非, 宋永加. 1998. 1991年夏东亚阻塞高压形成的诊断分析[J]. 气象学报, 56 (2): 212-224. Wang Yafei, Song Yujia. 1998. A diagnostic analysis on the growth mechanism of the East Asia blocking high in 1991[J]. Acta Meteorologica Sinica (in Chinese), 56 (2): 212-224.
[16]  吴国雄, 刘辉, 陈飞, 等. 1994. 时变涡动输送和阻高形成——1980年夏中国的持续异常天气[J]. 气象学报, 52 (3): 308-320. Wu Guoxiong, Liu Hui, Chen Fei, et al. 1994. Transient eddy transfer and formation of blocking high on the persistently abnormal weather in the summer of 1980[J]. Acta Meteorologica Sinica (in Chinese), 52 (3): 308-320.
[17]  宗海峰, 张庆云, 陈烈庭. 2008. 东亚—太平洋遥相关型形成过程与ENSO盛期海温关系的研究[J]. 大气科学, 32 (2): 220-230. Zong H F, Zhang Q Y, Chen L T. 2008. A study of the processes of East Asia-Pacific teleconnection pattern formation and the relationship to ENSO[J]. Chinese Journal of Atmospheric Sciences (in Chinese), 32 (2): 220-230.
[18]  Bueh C, Nakamura H. 2007. Scandinavian pattern and its climatic impact[J]. Quart. J. Roy. Meteor. Soc., 133 (629): 2117-2131.
[19]  Bueh C, Shi N, Ji L, et al. 2008. Features of the EAP events on the medium-range evolution process and the mid-and high-latitude Rossby wave activities during the Meiyu period[J]. Chinese Science Bulletin, 53 (4): 610-623.
[20]  Holopainen E, Fortelius C. 1987. High-frequency transient eddies and blocking[J]. J. Atmos. Sci., 44 (12): 1632-1645.
[21]  Huang G. 2004. An index measuring the interannual variation of the East Asian summer monsoon—The EAP index[J]. Adv. Atmos. Sci., 21 (1): 41-52.
[22]  Huang R, Sun F. 1992. Impact of tropical western Pacific on the East Asian summer monsoon[J]. J. Meteor. Soc. Japan, 70: 243-256.
[23]  Kanamitsu M, Ebisuzaki W, Woollen J, et al. 2002. NCEP-DOE AMIP-II reanalysis (R-2)[J]. Bull. Amer. Meteor. Soc., 83 (11): 1631-1643.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133