海冰航空调查有关初生冰记录商讨     

李培顺 《海洋通报》1995,14(1):94-95

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Seasonal cycle of topography in the Bohai Sea and Yellow Sea and its relationships with atmospheric forcing and oceanic adjustment based on altimetry data   总被引：1，自引：0，他引：1  

王凡林鹏飞  陈永利唐晓晖 《中国海洋湖沼学报》2004,22(3):256-264

Seasonal cycle is the most significant signals of topography and circulation in the Bohai Sea (BS)and Yellow Sea (YS) forced by prevailing monsoon and is still poorly understood due to lack of data in their interiors. In the present study, seasonal cycles of topography in the BS and YS and its relationship with atmospheric forcing and oceanic adjustment were examined and discussed using TOPEX/Poseidon and ERS-I/2 Sea Level Anomalies (SLA) data. Analyses revealed complicated seasonal cycles of topography composed mainly of 2 REOF modes, the winter-summer mode (WlM) and spring-autumn mode (SAM). The WlM with action center in the BS displayed peak and southward pressure gradient in July, and valley and northward pressure gradient in January, which is obviously the direct response to monsoon with about l-month response time. The SAM with action center in the western south YS displayed peak and northward pressure gradient in October and valley and southward pressure gradient in April. After the mature period of monsoon, the action center in the BS becam eweakened while that in the western south YS became strengthened because of regional convergence or divergence induced by seasonal variations of the Taiwan Warm Current and Yellow Sea Coastal Current. The direct response of topography to monsoon resulted in the WIM, while oceanic adjustment of topography played an important role in the forming of the SAM.  相似文献   

渤海地震的研究综述   总被引：8，自引：0，他引：8  

魏光兴  季同仁 《地震学刊》1990,(3):1-6

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Annual Cycle and Budgets of Nutrients in the Bohai Sea     

ZHAOLiang WEIHao FENGShizuo 《青岛海洋大学学报(英文版)》2002,1(1):29-37

The environmental problems in the Bohai Sea have become more serious in the last decade. High nutrient concentration contributes much to it. A Sino-German cooperation program has been carried out to improve the understanding of the ecosystem by observations and modelling. A three-dimensional ecosystem model, coupled with a physical transport model, is adopted in this study. The simulation for the year 1982 is validated by the data collected in 1982/1983. The simulated annual mean nutrient concentrations are in good agreement with observations. The nutrient concentrations in the Bohai Sea, which are crucial to the algal growth, are high in winter and low in summer. There are depletion from spring to summer and eleva-tion from autumn to winter for nutrients. The nutrients‘ deple tion is a response to the consumption of the phytoplankton bloom in spring. Internal recycle and external compensation affect the nutrient cycle. Their contributions to the nutrient budgets are discussed based on the simulated results. Production and respiration are the most important sink and source of nutrients. The process of photosynthesis consumes 152 kilotons-P and 831.1 kilotons-N while respiration releases 94.5 kilotons-P and 516.6 kilotons-N in the same period. The remineralization of the detritus pool is an important source of nutrient regeneration. It can compensate 23 percent of the nutrient consumed by the production process. The inputs of phosphates and nitrogen from rivers are 0.55 and 52.7 kilotons respectively. The net nutrient budget is 3.05 kilotons-P and 31.6 kilotons-N.  相似文献   

渤海,菏泽震区调制地震与邻区地震活动的关系     

苏鸾声 《地震学刊》1990,(3):87-90

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渤海地区近期地震活动特征及其趋势分析   总被引：3，自引：0，他引：3  

赵兴兰  魏光兴 《地震学刊》1990,(3):56-59

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渤海西,南岸的海面变化及邻近地区的现代地壳垂直运动   总被引：4，自引：0，他引：4  

黄立人  胡惠民 《地壳形变与地震》1991,11(1):1-9

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渤海及其邻近地区热流值的初步分析   总被引：15，自引：2，他引：13       下载免费PDF全文

解政文  吴乾蕃  张汝惠  谢奕真 《地震地质》1980,2(3):57

本文描述了渤海及其邻近地区的地热状况,指出该地区的地层温度、地温梯度和大地热流有从四周向渤海逐步地升高的趋势,其与地质构造特征和地壳上地幔结构可相对应,与其它地球物理场特征大致吻合。并提出该区尤其是郯庐带的某些地段可能有上地幔物质上涌,引起地壳深部产生很大的温度差异和密度差异,造成热应力的高度集中  相似文献   

南半球大气环流,南极海冰对广西区前汛期降雨的影响     

吴恒强  覃武 《广西气象》1998,19(1):3-8

利用南半球５００ｈＰａ和海平面气压网格点资料和南极海水资料,对广西前汛期降雨作了相关计算和初步分析,认为澳大利亚高压、马斯克林高压、南太平洋高压在前汛期不同时期起着季风分量和季风变异源的作用。指出,前汛期南半球海平面气压距平场特征和南极罗斯海方向海冰北界距平对广西区前汛期雨情有预示作用。  相似文献   

1966～1991年北极海冰模拟结果与观测的对比   总被引：5，自引：0，他引：5  

方之芳  宇如聪  金向泽  张学洪 《大气科学》1998,22(3):305-317

利用宇如聪等1995年建立的北极区域冰-洋耦合模式,以1966～1991年期间逐月的月平均实测海平面气温和气压场为强迫场,模拟了上述26年间北极海冰的时间演变和空间分布,着重分析了大西洋及欧洲沿岸一侧的巴伦支海和格陵兰海的海冰状况,并与目前能够得到的北极海冰密集度观测资料做了对比,结果表明:（1）模式对巴伦支海海冰年际变化的模拟是比较成功的,表现在不仅模拟的1969～1979和1979～1987这两个时段的主要变化趋势和观测事实比较一致,而且模拟出了1979和1984这两个多冰和少冰的极端年份。模拟的主要  相似文献