The approach of the previous anomalous heat content in the western Pacific warm pool affecting the summer rainfall over the middle and lower reaches of the Yangtze River

被引:3
作者
Qi Li [1 ]
Wang Xiao-Fang
He Jin-Hai [1 ]
Zhang Wen-Jun [1 ]
Wu Jie [2 ,3 ]
机构
[1] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster, Minist Educ, Nanjing 210044, Jiangsu, Peoples R China
[2] Zhongshan Meteorol Bur, Guangdong Zhongshan 528401, Peoples R China
[3] Natl Climate Ctr China Meteorol Adm, Lab Climate Studies, Beijing 100081, Peoples R China
来源
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION | 2014年 / 57卷 / 06期
关键词
Western Pacific warm pool; Heat content; Summer rainfall over the middle and lower reaches of the Yangtze River; Precursory signal; Teleconnection; SEA-SURFACE TEMPERATURE; EAST-ASIA; CIRCULATION; DYNAMICS; CLIMATE; TELECONNECTION; VARIABILITY; VALLEY;
D O I
10.6038/cjg20140609
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The relationship between the previous heat content anomaly in the western Pacific warm pool (WPWP) and summer rainfall over the middle and lower reaches of the Yangtze River, and the way how heat content anomaly probably affects the summer rainfall are studied by using the historical ocean temperature analysis data provided by Japan Meteorological Agency, NCEP/NCAR reanalysis dataset, sea surface temperature and rainfall data. The results indicated that there is a significant two-season lead negative correlationship between the previous heat content of the WPWP and the summer rainfall over the middle and lower reaches of. the Yangtze River, and it is an important indicator for prediction that the smaller anomalies of the 0 similar to 200 m heat content averaged from November to January in the key area (166. 5 degrees E-173. 5 degrees W, 7. 5 degrees S-3. 5 degrees N) are followed by more rain in the middle and lower reaches of the Yangtze River. The baroclinic East Asia-Pacific (EAP) teleconnection stimulated by the previous heat content anomaly for its persistence in the WPWP may be the main reason that influences the summer rainfall in the middle and lower reaches of the Yangtze River. The negative heat content anomaly between the previous November and January in the key area leads to the formation and persistence of anomalous Philippine Sea anticyclone. In summer, the anticyclone expands northwestward and strengthens, and then the EAP teleconnection appears along the East Asian coast, which makes the middle and lower reaches of the Yangtze River and the area to its east in the Northwest Pacific subtropical region under the control of anomalous cyclone, and thus the middle and lower reaches of the Yangtze River becomes the area where cold air from the North and warm air from the South join together. At the same time, there exists a wave train of EAP pattern in the upper troposphere tilting to northwest compared to the middle and lower troposphere, so that the middle and lower reaches of the Yangtze River and the area to its south is under the control of anomalously stronger high, which is conducive to more rain in the middle and lower reaches of the Yangtze River with upper tropospheric divergence as well as middle and lower tropospheric convergence, and vice versa.
引用
收藏
页码:1769 / 1781
页数:13
相关论文
共 41 条
  • [1] Bai H, 1989, MAR SCI, P7
  • [2] Chen MY, 2002, J HYDROMETEOROL, V3, P249, DOI 10.1175/1525-7541(2002)003<0249:GLPAYM>2.0.CO
  • [3] 2
  • [4] Chen Y L, 2003, SCI TECHNICAL MIDDLE, P29
  • [5] [陈永利 Chen Yongli], 2003, [海洋学报, Acta Oceanologica Sinica], V25, P20
  • [6] Chun Li, 2008, JOURNAL OF TROPICAL OCEANOGRAPHY, V27, P38
  • [7] CORNEJOGARRIDO AG, 1977, J ATMOS SCI, V34, P1155, DOI 10.1175/1520-0469(1977)034<1155:OTHBOT>2.0.CO
  • [8] 2
  • [9] A physically-based statistical forecast model for the middle-lower reaches of the Yangtze River Valley summer rainfall
    Fan Ke
    Wang HuiJun
    Choi Young-Jean
    [J]. CHINESE SCIENCE BULLETIN, 2008, 53 (04): : 602 - 609
  • [10] [龚道溢 Gong Daoyi], 2003, [气象, Meteorological Monthly], V29, P3