CHARACTERISTICS OF ATMOSPHERIC CIRCULATION ANOMALIES DURING PERSISTENT DROUGHTS IN NORTH CHINA FOR LAST TWO DECADES

Wei Jie; Zhang Qingyun; Tao Shiyan

Vol.14, NO.2, 2003

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2003 > 14(2): 140-151

Wei Jie, Zhang Qingyun, Tao Shiyan. Characteristics of atmospheric circulation anomalies during persistent droughts in North China for last two decades. J Appl Meteor Sci, 2003, 14(2): 140-151.

Citation:

Wei Jie, Zhang Qingyun, Tao Shiyan. Characteristics of atmospheric circulation anomalies during persistent droughts in North China for last two decades. J Appl Meteor Sci, 2003, 14(2): 140-151.

Wei Jie, Zhang Qingyun, Tao Shiyan. Characteristics of atmospheric circulation anomalies during persistent droughts in North China for last two decades. J Appl Meteor Sci, 2003, 14(2): 140-151.

Citation:

Wei Jie, Zhang Qingyun, Tao Shiyan. Characteristics of atmospheric circulation anomalies during persistent droughts in North China for last two decades. J Appl Meteor Sci, 2003, 14(2): 140-151.

PDF( 675 KB)

CHARACTERISTICS OF ATMOSPHERIC CIRCULATION ANOMALIES DURING PERSISTENT DROUGHTS IN NORTH CHINA FOR LAST TWO DECADES

Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029

Received Date: 2002-01-08
Rev Recd Date: 2002-05-27
Publish Date: 2003-04-30

Abstract

Abstract

The persistent droughts during the last two decades in North China are studied.The main results are as follows :(1) The Palmer Drought Severity Index (PDSI) shows that there is inter-annual variation in droughts in North China.The inter-decadal variation is even more remarkable.Before the mid-1970s, there was wetsummer climate, while since 1970, there were more drought years in North China.Moreover, the most severe droughts happened after the 1980s.(2) Summer droughts in North China are the consequence of persistent anomalous circulation over the Eurasia.The main features of the anomalous circulation include that there is height anomaly in the region of 55°to 65°N, 60°to 135°E and that there was EU teleconnection and it is the main type of atmospheric circulation anomalies that causes the persistent summer droughts in North China.(3) During the summer drought years, there is continuity in the distribution of the 500 hPa height anomaly field from winter to summer.(4) The anomalies of the general atmospheric circulation during droughts in North China are not local phenomena, but the responses to the Northern Hemisphere general atmospheric circulation anomaly.
- North China;
- Summer drought;
- Atmospheric circulation anomalies;
- EU teleconnection

FullText(HTML)

References(16)

Figures and Tables

图 1 华北春 (a)、夏 (b) 及年平均 (c) 标准化的Palmer指数 (黑色框) 年际变化及其二项式滤波 (实线)

DownLoad: Full-Size Img PowerPoint

图 2 1951年1月— 2000年10月华北区域平均标准化PDSI指数逐月变化图

DownLoad: Full-Size Img PowerPoint

图 3 华北6个干旱年 (a) 和6个湿年 (b)7月500 hPa月平均高度距平合成图

(阴影区为通过信度95 %的区域)

DownLoad: Full-Size Img PowerPoint

图 4 华北地区夏季典型干旱年 (a、b) 和湿润年 (c、d) 的前期500 hPa高度距平合成图

(a) 干旱年前期1月, (b) 干旱年前期4月, (c) 湿润年前期1月, (d) 湿润年前期4月 (其它说明同图 3)

DownLoad: Full-Size Img PowerPoint

图 5 (a) PDSI指数第一模态空间分布, (b) PDSI时间系数求出的500 hPa高度场第一回归模态, (c) 第一时间系数

(实线:高度场序列, 虚线:PDSI指数序列)

DownLoad: Full-Size Img PowerPoint

图 6 典型干年7月37.5°-42.5°N范围内位势高度距平气压-经度剖面图

DownLoad: Full-Size Img PowerPoint

图 7 北半球7月500 hPa高度距平场EOF分解第一模态的空间分布 (a) 及对应的时间系数 (b)

DownLoad: Full-Size Img PowerPoint

图 8 北半球7月500 hPa高度距平场EOF分解第二模态的空间分布 (a) 及对应的时间系数 (b)

DownLoad: Full-Size Img PowerPoint

表 1 Palmer指数干湿等级

References

[1]	黄荣辉, 徐予红, 周连童.我国夏季降水的年代际变化及华北干旱化趋势.高原气象, 1999, 18(4):465-475. http://www.cnki.com.cn/Article/CJFDTOTAL-GYQX199904000.htm
[2]	张庆云.1880年以来华北降水及水资源的变化.高原气象, 1999, 18(4):486-495. http://www.cnki.com.cn/Article/CJFDTOTAL-GYQX199904002.htm
[3]	叶笃正, 黄荣辉, 等.长江黄河流域旱涝规律和成因研究.山东:山东科学技术出版社, 1996.
[4]	魏凤英, 曹鸿兴.华北干旱异常的地域特征.应用气象学报, 1998, 9(2):205-217. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=19980228&flag=1
[5]	叶笃正, 黄荣辉主编.旱涝气候研究进展.北京:气象出版社, 1990.
[6]	严中伟.华北降水年代际振荡及其与全球温度变化的联系.应用气象学报, 1999, 10(增刊):16-22. http://www.cnki.com.cn/Article/CJFDTOTAL-YYQX9S1.002.htm
[7]	安顺清, 邢久星.帕尔默旱度模式的修正.气象科学研究院院刊, 1986, 1(1):75-82. http://www.cnki.com.cn/Article/CJFDTOTAL-SWZZ606.004.htm
[8]	Palmer W C.Meteorological Drought.U.S Weather Bureau.Res.Pap, 1965, (45):1-58. https://www.ncdc.noaa.gov/temp-and-precip/drought/docs/palmer.pdf
[9]	Barnston A G, Livezey R E.C lassification, seasonality and persistence of low-frequency atmospheric circulation pattern.Mon.Wea.Rev., 1987, 115 :1083-1126. doi: 10.1175/1520-0493(1987)115 & lt; 1083:CSAPOL & gt; 2.0.CO; 2
[10]	Wallace J M, Gutzler D S.Teleconnections in the geopotential height field during the Northern Hemisphere winter.Mon.Wea.Rev., 1981, 112 :2135-2147.
[11]	李金龙, 李志锦, 纪立人.北半球夏季环流持续性异常及其发展特征.大气科学, 1998, 22(1):57-68. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK801.007.htm
[12]	陶诗言, 徐淑英.夏季江淮流域持久性旱涝现象的环流特征.气象学报, 1962, 32 :1-10. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB196201000.htm
[13]	Jerome Namias.Some cause of United States drought.Journal of Climate and Applied Meteor, 1983, 22 :30-39.
[14]	Lau K M, Kim K M, Yang S.Dynamical and boundary forcing characteristics of regional components of the Asian summermonsoon.J.Climate, 2000, 13 :2461-2481. doi: 10.1175/1520-0442(2000)013 & lt; 2461:DABFCO & gt; 2.0.CO; 2
[15]	Chung-Kyu Park, S chubert S D.On the nature of the 1994 east Asian summer drought.J.Climate, 1997, 10 :1056-1069. doi: 10.1175/1520-0442(1997)010 & lt; 1056:OTNOTE & gt; 2.0.CO; 2
[16]	Wallace J M, Jing Q R.On the observed structure of the in terannual variability of the atmosphere/ocean climate system.Cattle H, Ed.Atmosphere and ocean variability.Quart.J.Roy.Meteor.Soc., 1987, 12 :17-43.