OUTFLOW OF SUSPENDED MATERIALS FROM THE CHANGJIANG RIVER MOUTH     

彭马川  胡敦欣 《中国海洋湖沼学报》1997,15(3):258-263

ImODUrmNJ0GFS(JointGlobaldrinFLuxStudy:l99()-2OO()isaworldwidenawhprogramfocusingontheoasns'buharolewhentheC0,prmtageintheairincreasesandtheatmOspheretemPeraturebo.ThefluxofsuspendedrnateriaIs(SM)intheEastChinaScaisboortanttotheworld'srnatterchaltfon,astheChangiiangRiver,thelargestriverinAsia,dischargesbillionsoftOnsoftheidWhterintoit.ManystudAshavebocondtalonSMmovementncarChina'scoastalseas.Yang(l983)studiedthefine%rainedsededtSfromtheChangiiangandHuangheRiversWhileQin(l983)fo…  相似文献   

VARIABILITY OF THERMOHALINE STRUCTURE AT 4°S,156°E DURING TOGA COARE IOP     

冯明  胡敦欣 《中国海洋湖沼学报》1995,(1)

The thermohaline structure at 4 °S, 156 °E was analyzed based on CTD data acquired during theTOGA COARE Intensive Observing Period(IOP) from November,1992 to February,1993. The ocean re-sponses during two Madden-Julian Oscillation(MJO)events were preliminarily studied based onmeteorological field observation.The main water masses at the observation point were Tropical SurfaceWater, Southern Subtropical Lower Water and Southern Intermediate Water from surface downward. Therewas good correlation of sea surface temperature with the wind field,and of the surface salinity with windspeed and rainfalls. Both of the two surface variables were also modulated by upwelling caused by west-erly winds at the observation point. The isohaline layer was not always shallower than the isothermal lay-er in this observation and could be considered as the lower limit of the diurnal variation of theisothermal layers in most cases. The existence of large variations of the maximum salinity core is sug-gested to be related to t  相似文献   

EMPIRICAL ORTHOGONAL MODES IN THE WESTERN PACIFIC     

崔茂常  胡敦欣 《中国海洋湖沼学报》1990,(4)

The method of empirical orthogonal modes has been widely used since the 1970's in physical oceanography to study and rebuild vertical structures of ocean dynamic factors. Because of the dominance of the low modes, the dynamic profile data can be largely reduced.Up to now, all expressions of empirical orthogonal modes are numerical. In this study, an analytic expression for empirical orthogonal ocean modes is constructed for convenient use whereby any numerical expressions can be repeated.The features of the normal modes decomposed from the buoyance frequency profiles obtained in October of 1986,1987 and 1988 by the R/V Science 1 in the western Pacific are quantitatively examined in this study.  相似文献   

热带太平洋海洋环流与暖池的结构特征、变异机理和气候效应   总被引：3，自引：0，他引：3  

王凡  胡敦欣  穆穆  王启  何金海  朱江  刘志宇 《地球科学进展》2012,27(6):595-602

热带西太平洋暖池是引发强烈的大气对流、驱动Walker环流和Hadley环流系统的主要热源之一,对全球、尤其是东亚气候有重要影响。针对我国在提升气候预测水平方面的重大和迫切需求,国家重点基础研究发展计划项目"热带太平洋海洋环流与暖池的结构特征、变异机理和气候效应"于2011年7月正式立项。项目拟解决的关键科学问题包括:①调控暖池形成和变异的海洋环流多尺度相互作用过程;②海洋动力过程在暖池热盐结构变异中的作用及其机理;③暖池变异对不同类型El Nio影响机理的异同和对东亚季风变异的调制机理。围绕上述关键科学问题,项目将以暖池变异为中心,关注影响和控制暖池结构与变异的关键海洋过程,以及暖池海气相互作用影响ENSO循环、东亚季风年际变异的过程和机理,重点组织开展以下3个方面有针对性的调查研究:①热带太平洋环流和暖池的结构和变异特征;②热带太平洋环流与暖池相互作用的关键过程和机理;③暖池变异的海洋—大气耦合过程及其气候效应。在此基础上,项目将力争阐明暖池影响东亚季风和我国气候变异的过程、机理与敏感区,改进模式的混合参数化方案,提出有效提高ENSO预报技巧的同化方案,为我国短期气候预测能力的提高提供科学支撑。  相似文献   

Interannual variations of North Equatorial Current transport in the Pacific Ocean during two types of El Niño     

吴国丽  翟方国  胡敦欣 《中国海洋湖沼学报》2016,34(3):585-596

Interannual variations of Pacific North Equatorial Current (NEC) transport during eastern-Pacific El Niños (EP-El Niños) and central-Pacific El Niños (CP-El Niños) are investigated by composite analysis with European Centre for Medium-Range Weather Forecast Ocean Analysis/Reanalysis System 3. During EP-El Niño, NEC transport shows significant positive anomalies from the developing to decay phases, with the largest anomalies around the mature phase. During CP-El Niño, however, the NEC transport only shows positive anomalies before the mature phase, with much weaker anomalies than those during EP-El Niño. The NEC transport variations are strongly associated with variations of the tropical gyre and wind forcing in the tropical North Pacific. During EP-El Niño, strong westerly wind anomalies and positive wind stress curl anomalies in the tropical North Pacific induce local upward Ekman pumping and westward-propagating upwelling Rossby waves in the ocean, lowering the sea surface height and generating a cyclonic gyre anomaly in the western tropical Pacific. During CP-El Niño, however, strength of the wind and associated Ekman pumping velocity are very weak. Negative sea surface height and cyclonic flow anomalies are slightly north of those during EP El Niño.  相似文献   

A numerical study on seasonal variations of the Taiwan Warm Current   总被引：3，自引：0，他引：3  

白学志  胡敦欣 《中国海洋湖沼学报》2004,22(3):278-285

Princeton Ocean Model (POM) is employed to investigate the Taiwan Warm Current (TWC) and its seasonal variations. Results show that the TWC exhibits pronounced seasonal variations in its sources, strength and flow patterns. In summer, the TWC flows northeast in straight way and reaches around 32°N; it comes mainly from the Taiwan Strait, while its lower part is from the shelf-intrusion of the Kuroshio subsurface water (KSSW). In winter, coming mainly from the shelf-intrusion of the Kuroshio northeast of Taiwan, the TWC flows northward in a winding way and reaches up around 30°N. The Kuroshio intrusion also has distinct seasonal patterns. The shelf-intrusion of KSSW by upwelling is almost the same in four seasons with a little difference in strength; it is a persistent source of the TWC. However, Kuroshio surface water (KSW) can not intrude onto the shelf in summer, while in winter the intrusion of KSW always occurs. Additional experiments were conducted to examine effects of winds and transport through  相似文献