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作为北极海洋要素的重要来源之一,白令海峡区域的太平洋入流水在北冰洋表层海洋环流和物质能量输运过程中发挥着重要作用,对区域乃至全球气候和生态系统产生深远影响,然而现今的研究对太平洋入流水出现的新变化以及其如何参与北冰洋的海洋–大气过程了解得还不够深入。本文梳理了目前国内外有关太平洋入流水流量、环流与水团等主要特征的相关研究进展,总结了太平洋入流水的流量变化和驱动机制、环流路径和影响因素,以及与太平洋水有关的水团特征,并在前人研究的基础上对未来的研究方向予以展望。 相似文献
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一、国际日期变更线与180°经线
基本概念：①国际上规定，以180°经线作为“国际日期变更线”，又称人文日界线。②“国际日期变更线”是地球上新一天的开始和旧一天的终结，越过日界线向东进入旧一天，越过日界线向西进入新一天。⑧实际上“国际日期变更线”并不与180°经线完全重合，而是有几处折曲（白令海峡、阿留申群岛、斐济群岛等）．如图1所示。 相似文献
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Motoyoshi Ikeda 《极地研究(英文版)》2008,19(2):212-217
The sea ice cover in the Arctic Ocean has been reducing and hit the low record in the summer of 2007. The anomaly was extremely large in the Pacific sector. The sea level height in the Bering Sea vs. the Greenland Sea has been analyzed and compared with the current meter data through the Bering Strait. A recent peak existed as a consequence of atmospheric circulation and is considered to contribute to inflow of the Pacific Water into the Arctic Basin. The timing of the Pacific Water inflow matched with the sea ice reduction in the Pacific sector and suggests a significant increase in heat flux. This component should be included in the model prediction for answering the question when the Arctic sea ice becomes a seasonal ice cover. 相似文献
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The distribution of chlorophyll a and its influencing factors in different regions of the Bering Sea
The distribution of chlorophyll a(Chl a) and its relationships with physical and chemical parameters in different regions of the Bering Sea were discussed in July 2010. The results showed the seawater column Chl a concentrations were 13.41–553.89 mg/m2 and the average value was 118.15 mg/m2 in the study areas. The horizontal distribution of Chl a varied remarkably from basin to shelf in the Bering Sea. The regional order of Chl a concentrations from low to high was basin, slope, outer shelf, inner shelf, and middle shelf. The vertical distribution of Chl a was grouped mainly from single-peak type in basin, slope, outer shelf, and middle shelf, where the deep Chl a maxima(DCM) layer was observed at 25–50 m, 30–35 m, 36–44 m, and 37–47 m, respectively. The vertical distribution of Chl a mainly had three basic patterns: standard single-peak type, surface maximum type, and bottom maximum type in the inner shelf. The analysis also showed that the transportation of ocean currents may control the distribution of Chl a, and the effects were not simple in the basin of the Bering Sea. There was a positive correlation between Chl a and temperature, but no significant correlation between Chl a and nutrients. The Bering Sea slope was an area deeply influenced by slope current. Silicate was the factor that controlled the distribution of Chl a within parts of the water in the slope. Light intensity was an important environmental factor in controlling seawater column Chl a in the shelf, where Chl a was limited by nitrate rather than phosphate within the upper water. Meanwhile, there was a positive relationship between Chl a and salinity. Algal blooms broke out at Sta. B6 of the southwestern St. Lawrence Island and Stas F6 and F11 in the middle of the Bering Strait. 相似文献
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The 3rd Chinese National Arctic Research Expedition(CHINARE–Arctic III) was carried out from July to September in 2008. The partial pressure of CO2(pCO2) in the atmosphere and in surface seawater were determined in the Bering Sea during July 11–27, 2008, and a large number of seawater samples were taken for total alkalinity(TA) and total dissolved inorganic carbon(DIC) analysis. The distributions of CO2 parameters in the Bering Sea and their controlling factors were discussed. The pCO2 values in surface seawater presented a drastic variation from 148 to 563 μatm(1 μatm = 1.013 25×10-1 Pa). The lowest pCO2 values were observed near the Bering Sea shelf break while the highest pCO2 existed at the western Bering Strait. The Bering Sea generally acts as a net sink for atmospheric CO2 in summer. The air-sea CO2 fluxes in the Bering Sea shelf, slope, and basin were estimated at-9.4,-16.3, and-5.1 mmol/(m2·d), respectively. The annual uptake of CO2 was about 34 Tg C in the Bering Sea. 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
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近年来随着北极冰盖的融化,北极通航已成为可能,而白令海峡作为北极航道重要的出口/入口,其战略地位也将逐步显现并被各国关注。在讨论白令海峡的治理与合作时,首先要明确白令海峡是用于国际航行的海峡,而作为海峡沿岸国的美国和俄罗斯对于白令海峡的管控与合作将成为影响未来北极航行的重要因素。为同时保障海峡沿岸国与使用国的利益,可借鉴马六甲海峡的治理经验,在现有治理机制的基础上进一步深化海峡沿岸国与海峡使用国的合作机制。中国作为海峡使用国也有必要积极参与白令海峡的合作治理。 相似文献
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部落里最优秀的猎手,甚至仅凭着一杆鱼叉,或是一根梭镖,顶着冻原上凛冽的北风和北冰洋冰冷的海水,去和世界上最庞大的动物——鲸搏斗.对于从未见识过海洋威力的他们,究竟需要何等的勇气与信念.不知何时起,穿越小说蝗虫般地席卷了各大网站的读书频道,穿越剧也霸占了电视台的黄金档,颇有些“忽如一夜春风来”的味道.细想起来,每每在回溯... 相似文献