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The Atlantic inflow in the Fram Strait(78°50′N) has synoptic scale variability based on an array of moorings over the period of 1998–2010. The synoptic scale variability of Atlantic inflow, whose significant cycle is 3–16 d, occurs mainly in winter and spring(from January to April) and is related with polar lows in the Barents Sea. On the synoptic scale, the enhancement(weakening) of Atlantic inflow in the Fram Strait is accompanied by less(more)polar lows in the Barents Sea. Wind stress curl induced by polar lows in the Barents Sea causes Ekman-transport,leads to decrease of sea surface height in the Barents Sea, due to geostrophic adjustment, further induces a cyclonic circulation anomaly around the Barents Sea, and causes the weakening of the Atlantic inflow in the Fram Strait. Our results highlight the importance of polar lows in forcing the Atlantic inflow in the Fram Strait and can help us to further understand the effect of Atlantic warm water on the change of the Arctic Ocean. 相似文献
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印度尼西亚北苏拉威西蓝碧海峡浮游动物种类组成及分布 总被引:1,自引:0,他引:1
Based on oceanographic survey data in June 2012 in the Lembeh Strait, the zooplankton ecological characteristics such as species composition, individual abundance, dominant species and distribution were analyzed. The results showed that 183 species(including 4 sp.) had been recognized, most of them belonged to copepoda.Cnidaria followed with 43 species(including 1 sp.) were identified. The average abundance of zooplankton was(150.47±58.91) ind./m~3. As to the horizontal distribution, the abundance of the zooplankton was higher in the southern waters than in the northern waters. The dominant species in the study area were Lensia subtiloides,Sagitta enflata, Lucifer intermedius, Oikopleura rufescens, Diphyes chamissoni, Creseis acicula, Subeucalanus subcrassus, Temora discaudata, Aglaura hemistoma, Doliolum denticulatum, Canthocalanus pauper, Oikopleura longicauda and Nanomia bijuga. Zooplankton biodiversity indexes were higher in study area than previous study in the other regions. The findings from this study provide important baseline information for future research and monitoring programs. 相似文献
24.
Sub-seasonal variability of Luzon Strait Transport in a high resolution global model 总被引:1,自引:1,他引:0
The Luzon Strait is the main impact pathway of the Kuroshio on the circulation in South China Sea (SCS). Based on the analysis of the 1997–2007 altimeter data and 2005–2006 output data from a high resolution global HYCOM model, the total Luzon Strait Transport (LST) has remarkable subseasonal oscillations with a typical period of 90 to 120 days, and an average value of 1.9 Sv into SCS. Further spectrum analysis shows that the temporal variability of the LST at different depth is remarkable different. In the upper layer (0–300 m), westward inflow has significant seasonal and subseasonal variability. In the bottom layer (below 1 200 m), eastward outflow exhibits remarkable seasonal variability, while subseasonal variability is also clear. In the intermediate layer, the westward inflow is slightly bigger than the eastward outflow, and both of them have obvious seasonal and subseasonal variability. Because the seasonal variation of westward inflow and eastward outflow is opposite, the total transport of intermediate layer exhibits significant 50–150 days variation, without obvious seasonal signals. The westward Rossby waves with a period of 90 to 120 days in the Western Pacific have very clear correlationship with the Luzon Strait Transport, this indicates that the interaction between these westward Rossby waves and Kuroshio might be the possible mechanism of the subseasonal variation of the LST. 相似文献
25.
The Luzon Strait is the only deep channel that connects the South China Sea(SCS) with the Pacific.The transport through the Luzon Strait is an important process influencing the circulation,heat and water budgets of the SCS.Early observations have suggested that water enters the SCS in winter but water inflow or outflow in summer is quite controversial.On the basis of hydrographic measurements from CTD along 120° E in the Luzon Strait during the period from September 18 to 20 in 2006,the characteristics of t... 相似文献
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在当代,石油为能源中的天之骄子,而海湾地区又为世界首屈一指的石油产地,因而扼海湾进出咽喉的霍尔木兹海峡的重要性大增,在当今世界上,仿佛成了千百条海峡中最重要的一个。所谓霍尔木兹,本来是一个城市和港口名字,后来成为岛名,最后才转用为海峡的名字。现在,霍尔木兹以海峡的名声大振,霍尔木兹岛也“健在”, 相似文献
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分析了采自南极布兰斯菲尔德海峡海槽中PC10孔(753cm长)的39个样品,共鉴定有孔虫14属21种。有孔虫埋藏可分为硅质壳、钙质壳和混合壳组合。硅质壳组合代表正常的深海沉积环境,反映了相对弱的海底水动力条件;钙质壳组合是浊流沉积的产物,反映了很强的海底水动力条件;混合壳组合则代表趋于正常的深海沉积环境,反映了由强渐弱的海底水动力条件。晚第四纪以来,本区经历了暖-冷-暖的气候变化过程。 相似文献
29.
一、地理位置和目的意义麦克期葳尔湾位于乔治王岛与纳尔逊岛之间。它的西北面、北面和东面为乔治王岛,西面为纳尔逊岛和菲尔斯海峡,南面和东南面为布兰斯菲尔德海峡。 相似文献
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太平洋作为世界第一大洋,位于亚洲、大洋洲、北美洲、南美洲和南极洲之间。西南以塔斯马尼亚岛东南角至南极大陆的经线(东经146°51’)与印度洋分界,东南以通过南美洲南端的合恩角的经线(西经67°)与大西洋分界,北经白令海峡与北冰洋相通,东经巴拿马运河和麦哲伦海峡、德雷克海峡通大西洋,西经马六甲海峡和巽他海峡通往印度洋,面积17967.7万平方千米,占地球表面总面积的35.2%,占世界海洋总面积的49.8%。 相似文献