近45年El Nino发生前后珠江口季风强度与海平面异常分析

ANALYSES OF MONSOON INTENSITY AND SEA LEVEL ANOMALIES FOR THE MOUTH OF THE PEARL RIVER AROUND THE OCCURRENCE OF EL NINO IN THE PAST 45 YEARS

1.
Guangdong Institute of Applied Climate, Guangzhou 510080 China
2.
South China Sea Oceanography Institute, Chinese Science Academy, Guangzhou 510301 China

摘要: 根据珠江口气象站风速与潮汐站潮位资料,对1955～1998年12次El Nino过程的珠江口季风强度与海平面变化特点进行合成分析,结果表明,El Nino发生前一年冬季,珠江口冬季平均风速较常年值大0.4m/s,El Nino发生当年,月平均风速也普遍大于常年,而月平均海平面则普遍较常年偏低,其中10与11月份负距平为6cm左右。东亚地区的季风异常对珠江口海平面异常有着重大的影响。
- ElNino /
- 季风强度 /
- 海平面异常
Abstract: Using data of wind speed from weather stations and tidal levels from tidal stations near the Pearl River mouth,composite study is carried out of monsoon intensity and sea level variation during 12 El Nino processes in 1955～1988. The result shows that the winter-mean wind speed is larger than normal by 0.4m/s in the preceding winter and monthly mean speed is generally higher than normal in the current year of El Nino events,while the monthly mean sea level is lower than normal with negative anomalies of about 6cm for October and November. Monsoon anomalies in East Asia poses significant influence on sea level anomalies at the mouth.
- El Nino /
- monsoon intensity /
- sea level anomalies

[1]	郭其蕴.东亚季风强度指数及其变化的分析[J].地理学报,1993,38:207－217.
[2]	施能,鲁建军,朱乾根.东亚冬夏季风百年强度指数及其气候变化[J].南京气象学院学报,1996,19:168－177.
[3]	黄刚,严中伟.东亚夏季风环流异常指数及其年度变化[J].科学通报,1999,44:421－424.
[4]	WEBSTER P J,YANG S.Monsoon and ENSO:Selectively interactive systems[J].Quart J Roy Met Soc,1992,118:877－920.
[5]	王沛霖,许丽章,孙力.对比度分析及其应用[J].热带气象学报,1997,13:375－379.
[6]	ENSO监测小组.厄尔尼诺事件的划分标准和指数[J].气象,1989,15(3):37－38.
[7]	叶笃正.当代气候研究[M].北京:气象出版社,1989,137－152.
[8]	穆明权,李崇银.东亚冬季风年际变化的ENSO信息[J].大气科学,1999,23:276－285.
[9]	林爱兰,吴尚森.近40多年广东省的寒潮活动[J].热带气象学报,1998,14:337－343.
[10]	刘赞沛,王一友,管瑾勋.ENSO期间中国沿岸海区月平均水位和月平均表面水温的变化特征[J].海洋科学,1989(4):13－20.
[11]	WYRTKI K.Sea level during the 1972 El Nino[J],Jou Phys Oceanogr,1977,7:779－782.
[12]	陈特固,詹小涌.广东沿岸1963年海平面异常低的原因分析[J].热带海洋,1988,7(2):45－53.
[13]	MEYERS G.Interracial variation in sea level near Truk island——A bimodal seasonal cycle[J].Jou Phys Oceanogr.1982,12:1161－1168.