The seasonal variations in the significant wave height and sea surface wind speed of the C
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Acta 0ceano1.Sin.,2015,Vo1.34,No.9,P.58—64
D0I:10.1007/s13131—015—0738—0
http://www.hyxb.org.cn
E-mail:hyxbe@263.net
The seasonal variations in the significant wave height and sea
surface wind speed of the China’s seas
ZHENG Chongwei , ,貅,PAN ling ,TAN Yanke ,GAP Zhansheng。,RUI Zhenfeng3,CHEN Chaohui
CollegeofMeteorologyandOceanography,People’sLiberationArmyUniversityofScienceandTechnology,
Nanjing211101,China
National Key Laboratory ofNumerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics
(LASG),Institute ofAtmospheric Physics,ChineseAcademyofSciences,Beijing 100029,China
。Dalian Naval Academy,Dalian 1 16018,China
Received 1 October 2014;accepted 4 March 2015
 ̄The Chinese Society of Oceanography and Springer—Verlag Berlin Heidelberg 2015
Abstract
Long—term variations in a sea surface wind speed(WS)and a significant wave height(SWH)are associated with
the global climate change,the prevention and mitigation of natural disasters,and an ocean resource exploitation, and other activities.The seasonal characte ristics Of the long—term trends in China s seas WS and SWH are determined based on 24 a(1988—2011)cross.calibrated,multi.platform(CCMP)wind data and 24 a hindcast wave data obtained with the WAVEWATCH—III(WW31 wave model forced by CCMP wind data.The results show the following.(1)For the past 24 a the China’s ws and SWH exhibit a significant increasing trend as a whole,of
3.38 cm/(s.a)in the WS,1.3 cm/a in the SwH.(2)As a whole,the increasing trend ofthe China’s seas WS and SwH is strongest in March—April—May(MAM)and December—January—February(DJF),followed by June—luly-August (JJA),and smallest in September—October—November(SON).(3)The areal extent of significant increases in the ws was largest in MAM.while the area decreased in lJA and DJF;the smallest area was apparent in SON.In contrast to the WS.almost all of China s seas exhibited a significant increase in SWH in MAM and DIF;the range was slightly smaller in 1JA and SON.The WS and SWH in the Bohai Sea.the Yellow Sea,East China Sea,the Tsushima Strait,the Taiwan Strait,the northern South China Sea,the Beibu Gulf,and the Gulf of Thailand exhibited a
significant increase in all seasons.f41 The variations in China s seas SWH and WS depended on the season.The
areas with a strong increase usually appeared in DJF.
Keywords:sea surface wind speed,significant wave height,long—term variation,seasonal difference
Citation:Zheng Chongwei,Pan Jing,Tan Yanke,Gap Zhansheng,Rui Zhenfeng,Chen Chaohui.2015.The seasonal variations in the significantwaveheight and sea surfacewind speed oftheChina’s seas.ActaOceanologica Sinica,34(9):58—64,doi:10.1007/s13131—015—
0738—0
1 Introduction
The 1ong—term variation in the ocean environment is associ—
ated with the global climate change,the prevention and mitiga—
tion of natural disasters,and the ocean resource exploitation,
among other activities(Huang et a1.,201 1).The climate changes
in the WS and the SWH greatly affect coastal Populations
(Soomere and Raamet,201 l;Suarez et a1.,2013;Zheng,Shao et
a1.,2014;Zheng,Pan et a1.,2014;Han et a1.,2014;Zheng,Jiang et
a1.,20l4;Ren et a1.,20l5);thus,it is necessary to evaluate the
long—term trends in these features.
Many excellent studies on the variation in the WS and SⅥm
have been presented by previous researchers.Gower(2002)
stated that both the Northeast Pacific WS and SWH exhibit a sig—
nificant increase of approximately 1-5 cm/(s・a)and 1-4 cm/a,re—
spectively,according to the buoy data.Gulev and Grigorieva
f20061 found that the winter SWH in the north Pacific and North
Atlantic midlatitudes exhibited a significant increase of 10—40
cm/decade over the past 45 a using lnternational Comprehens—
ive Ocean.Atmosphere Data Set(ICOADS)data.Young et a1. f201 l1 found a global increase in the WS and SWH over the past 23 a based on a database of calibrated and validated satellite alti—
meter measurements.Guillaume et a1.f2010)found that SwH
linearly increased fapproximately 2 cm/a1in the Northeast At—
lantic during l953—2009 using a third—generation wave mode1.
Utilizing 45 a of the European Centre for Medium. Range Weath—.
er Forecasts(ECMWF)reanalysis(ERA.4O)wave data,Zheng,
Zhou et a1.(2013)discovered that a majority of the global ocean
swell wave heights exhibit a significant linear increase(0.2—0.8
cm/a).There is good agreement between the long—term trend in the SWH and the trend in the swell wave height.
However,there are few studies on the overall climatic trends
of the China s seas WS and SWH and on the seasonal character— istics of the climatic trends.In the process of ocean engineering