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Characteristics and mechanisms of the intraseasonal variability of sea surface salinity in the southeastern arabian sea during 2015-2020

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Acta Oceanologica Sinica 2023年第5期42卷 25-34页

作者： Hui Teng Yun Qiu Xinyu Lin Xiwu Zhou Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Laboratory for Regional Oceanography and Numerical Modeling Laoshan LaboratoryQingdao 266237China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Fujian Provincial Key Laboratory of Marine Physical and Geological Processes Xiamen 361005China

Based on Soil Moisture Active Passive sea surface salinity(SSS)data from April 2015 to August 2020,combined with Objectively Analyzed Air-sea Heat Flux and other observational data and Hybrid Coordinate Ocean Model(HYCOM)data,this work explores the characteristics and mechanisms of the intraseasonal variability of SSS in the southeastern arabian sea(seaS).The results show that the intraseasonal variability of SSS in the seaS is very significant,especially the strongest intraseasonal signal in SSS,which is located along the northeast monsoon current(NMC)path south of the Indian *** are remarkable seasonal differences in intraseasonal SSS variability,which is very weak in spring and summer and much stronger in autumn and *** strong intraseasonal variability in autumn and winter is closely related to the Madden-Julian Oscillation(MJO)event during this *** northeast wind anomaly in the Bay of Bengal(BOB)associated with the active MJO phase strengthens the East India Coastal Current and NMC and consequently induces more BOB low-salinity water to enter the seaS,causing strong SSS *** addition,MJO-related precipitation further amplifies the intraseasonal variability of SSS in *** on budget analysis of the mixed layer salinity using HYCOM data,it is shown that horizontal salinity advection(especially zonal advection)dominates the intraseasonal variability of mixed layer salinity and that surface freshwater flux has a secondary role.

关键词： southeastern arabian sea sea surface salinity intraseasonal variability air-sea interaction

The Role of Barrier Layer in southeastern arabian sea During the Development of Positive Indian Ocean Dipole Events

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Journal of Ocean University of China 2013年第2期12卷 245-252页

作者： GUO Feiyan LIU Qinyu ZHENG Xiao-Tong SUN Shan Physical Oceanography Laboratory and Key Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong Ocean University of China NOAA Earth System Research Laboratory 325 BroadwayBoulderColorado 80305USA

Using data from Argo and simple ocean data assimilation (SODA), the role of the barrier layer (BL) in the southeastern arabian sea (seaS: 60°E-75°E, 0°-10°N) is investigated during the development of positive Indian Ocean Dipole (IOD) events from 1960 to 2008. It is found that warmer sea surface temperature (SST) in the northern Indian Ocean appears in June in the seaS. This warm SST accompanying anomalous southeastern wind persists for six months and a thicker BL and a corresponding thinner mixed layer in the seaS contribute to the SST warming during the IOD formation period. The excessive precipitation during this period helps to form a thicker BL and a thinner mixed layer, resulting in a higher SST in the seaS. Warm SST in the seaS and cold SST to the southeast of the seaS intensify the southeasterly anomaly in the tropical Indian Ocean, which transports more moisture to the seaS, and then induces more precipitation there. The ocean-atmosphere interaction process among wind, precipitation, BL and SST is very important for the anomalous warming in the seaS during the development of positive IOD events.

关键词： sea surface temperature (SST) mixed layer barrier layer Indian Ocean Dipole (IOD) persistence precipitation southeastern arabian sea

Coastal upwelling off the southwest coast of India:observations and simulations

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International Journal of Digital Earth 2016年第12期9卷 1256-1274页

作者： P.V.Hareesh Kumar P.Anand Naval Physical and Oceanographic Laboratory KochiKeralaIndia

Spatial hydrographic data collected from August 2007 through May 2008 and the Princeton Ocean Model(POM)are utilized to explain and document the upwelling in the south eastern arabian sea(seaS).The decrease in the magnitude of winds towards the coast favors local anticyclonic vorticity,resulting in the formation of cyclonic eddy and reversal of coastal *** Ekman transport due to alongshore winds,Ekman pumping due to wind stress curl,cyclonic eddy and southward West Indian Coastal Currents play different roles in the seaS *** the offshore,wind stress curl leads to the formation of meso-scale eddies,resulting in Ekman pumping at the center and consequent *** rapid depth variation on the western side of Quilon Mount intensifies upwelling in the *** upwelling Kelvin waves generated at the equator terminates in the Bay of Bengal and do not contribute to the seaS *** possible role of local and remote winds,especially around Sri Lanka on the upwelling dynamics of seaS is described utilizing *** Kelvin waves generated off the coast of Sri Lanka during the active phase of the summer monsoon also contribute to the upwelling dynamics off the west coast of India.

关键词： southeastern arabian sea coastal upwelling Upwelling Kelvin wave West Indian coastal currents 3-D circulation model

A review on the parasitic isopod genus Notophryxus ***,1883(Crustacea:Isopoda),and first report of Notophryxus globularis ***,1885 from Lakshadweep sea(Amini Island)

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Acta Oceanologica Sinica 2024年第8期43卷 142-153页

作者： Mukkattu Nazar Suhaana Jaime Gómez-Gutiérrez Paravanparambil Rajakumar Jayachandran Punnakkal Hari Praved Sivasankaran Bijoy Nandan Department of Marine Biology Microbiology and BiochemistrySchool of Marine SciencesCochin University of Science and TechnologyKochi-Kerala 682016India Departamento de Plancton y Ecología Marina Centro Interdisciplinario de Ciencias MarinasInstituto Politécnico NacionalLa Paz B.C.S.23096Mexico Applied Research Centre for Environment and Marine Studies King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

Isopod crustaceans of the family Dajidae are exclusively marine *** genus Notophryxus ***,1883 currently includes nine nominal species,which are very rarely reported as the chances for encountering these specimens are *** comprehension of the taxonomy,biology,ecology,and life cycle of species belonging to the Notophryxus genus is notably *** nominal species of Notophryxus genus are reviewed here to obtain a comprehensive and integrative taxonomic understanding of this genus,in an attempt to address the *** paper also documents the rediscovery of an ectoparasitic isopod from the genus Notophryxus in Indian waters,after 55 *** isopod specimens obtained from the outer reefs of Amini Island in the Lakshadweep archipelago,southeastern arabian sea,display morphological congruence to Notophryxus globularis ***,*** only previous report on this species dates back to 1885 from ***'description of *** as an ectoparasite on the euphausiid Thysanoessa gregaria ***,1883 in the North *** discovery represents a range extension of *** from the North Pacific to the arabian *** cryptoniscid larvae and three adult females of ***(with dwarf males)were found attached to four adult mysid specimens of Siriella aequiremis Hansen,*** present study provides an improved diagnosis of *** with the aid of light microscopy images and line drawings which was not given in the original ***,1885 *** research also provides a concise description of cryptoniscid larvae from the same sampling location and same host which is most likely to be *** larvae.

关键词： Dajiidae Mysid cryptoniscan larvae southeastern arabian sea Notophryxus