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Strengthening effect of super typhoon rammasun(2014)on upwelling and cold eddies in the South China Sea

Journal of Oceanology and Limnology 2021年第2期39卷 403-419页

作者： Xue LI Xiaolong ZHANG Dongyang FU Shan LIAO Guangdong Ocean Remote Sensing and Information Engineering Technology Research Center Guangdong Ocean UniversityZhanjiang 524088China State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Marine Resources Big Data Center of South China Sea Southern Marine Science and Engineering Guangdong LaboratoryZhanjiang 524088China Meteorological Bureau Yan’an 716000China School of Cybersecurity Sichuan UniversityChengdu 610065China

typhoon is one of the frequent natural disasters in coastal regions of *** shown in many studies,the impact of typhoons on the South China Sea(SCS)should not be *** typhoon rammasun(2014)was studied that formed in the northwestern Pacific,passed through the SCS,then landed in the Leizhou *** sensing data and model products were used to analyze the spatiotemporal variations of the cold eddies,upwelling,sea surface temperature,mixed layer depth,rainfall,sea surface salinity,suspended sediment concentration,and surface-level *** confirm the constant presence of upwelling and cold eddies in the southeast of Hainan(north of the Zhongsha Islands)and the southeast of Vietnam in *** addition,we found the strengthening effect of super typhoon rammasun on the upwelling and cold eddies in the *** major reasons for the continuous decrease in sea surface temperature and the slow regaining of seawater temperature were the enhanced upwelling and vertical mixing caused by the *** increasing of the surface runoff in the Indochina Peninsula was mainly affected by the typhoon,with some contribution for the southeast of Vietnam’s cold eddy and upwelling.

关键词： cold eddies sea surface temperature(SST) South China Sea(SCS) typhoon rammasun upwelling

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Restoration of Wind Speed in Qinzhou, Guangxi during typhoon rammasun

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Journal on Big Data 2022年第1期4卷 77-86页

作者： Aodi Fu Mingxuan Zhu Wenzheng Yu Xin Yao Hanxiaoya Zhang School of Geographical Sciences Nanjing University of Information Science&TechnologyNanjing210044China School of Applied Meteorology Nanjing University of Information Science&TechnologyNanjing210044China Faculty of Science the University of AucklandAuckland1010New Zealand

In 2014,typhoon rammasun invaded Qinzhou,Guangxi,causing damage to the wind tower sensor at 80 m in *** order to restore the wind speed at 80 m at that time,this paper was based on the hourly average wind speed data of the wind tower and meteorological station from 2017–2019,and constructed the wind speed related model of Meteorological Station and the wind measuring tower in Qinzhou,Moreover,this paper Based on the hourly average wind speed data of Qinzhou Meteorological Station in 2014,Restored the hourly average wind speed of the anemometer tower during rammasun *** results showed it is significant correlation that the hourly mean wind speed of the wind tower at 80 m and the hourly mean wind speed of meteorological station at 100 m(R2=0.9632),and speed of the wind measuring tower and speed of meteorological station constitutes an equation,This equation is Y=*** hourly average wind speed of the wind tower at 80 m during the 2014 rammasun Landing was restored using this *** the results in Schedule 4.

关键词： typhoon rammasun restoration of wind speed regression analysis

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Sedimentological and microfossil records of modern typhoons in a coastal sandy lagoon off southern China coast

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Journal of Palaeogeography 2021年第4期10卷 529-549页

作者： Hong-Shuai Qi Min Chen Lin-Nan Shen Feng Cai Ai-Mei Zhang Qi Fang Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005Fujian ProvinceChina Southern Marine Science and Engineering Guangdong Laboratory Zhuhai 519082Guangdong ProvinceChina Observation and Research Station of Coastal Wetland Ecosystem in Beibu Bay Ministry of Natural ResourcesBeihai 536015Guangxi ProvinceChina Xiamen Municipal Bureau of Land Resources and Housing AdministrationXiamen 361013Fujian ProvinceChina

To determine the characteristics and potential indicators of modern typhoon deposition in a sandy lagoon off the coast of Guangdong Province(southern China),we analysed the ^(210)Pb,sedimentology,and microfossils of samples from ten cores obtained before and after the passage of typhoon rammasun in *** deposition showed a thinning trend from internal areas of the lagoon to its mouth,with the maximum thickness inside the lagoon of~35 *** typhoon deposits are dominated by overwash and differ from sediments deposited under normal weather *** normal weather conditions,lagoon sediment has a210 Pb curve that follows a model of exponential decay,has a unimodal granularity frequency curve,and lacks organic matter and microfossils(diatoms and foraminifera).However,210 Pb is low in the typhoon deposits,the grain size is coarse,and the granularity frequency curve is obviously *** are also abundant foraminifera in the typhoon *** found a clear double-layered structure in the typhoon deposits,which was caused by strong hydrodynamic disturbance that mixed sediments originally from the offshore area with those of the *** lower layer has coarse-grained particles with medium sorting,low organic matter content,and low diatom *** upper layer has fine-grained particles with poor sorting,high organic matter content,and abundant *** rate of fragmentation of diatoms in the upper layer was very high(40%-60%).The diatom assemblage contained offshore and freshwater species carried by storm ***,we believe that the sediments of this typical sand bar-lagoon environment retain evidence of typhoon events along the southern China coast that is displayed in the marked sedimentological and microfossil characteristics.

关键词： Sediment record Microfossils typhoon rammasun Lagoon Southern China coast

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