“蛟龙”南海行

2013年6月10日上午,"向阳红09"船搭载着"蛟龙"号载人潜水器从江苏省江阴市起航,奔赴南海和太平洋执行首个试验性应用航次任务。整个航次分为三个航段实施。第一航段在南海进行长基线定位系统的功能试验,并开展深海科学研究;第二航段在东北太平洋中国大洋协会多金属结核勘探合同区,重点开展近底生物调查、地质取样、海底摄     

太平洋岛国对澳大利亚地缘战略影响的历史考察

历史上太平洋岛国对澳大利亚地缘战略的影响以第二次世界大战为分水岭，主要分为三个阶段：二战前是地缘战略缺失阶段，当时澳大利亚无视周边地缘环境，将国家安全系于遥远英帝国的庇护，忽视近邻岛屿的防御屏障作用，导致国家遭受战火；二战时期是地缘战略构建阶段，随着澳美战时同盟成立，太平洋上的海空航线成为澳大利亚的“生命线”，澳大利亚的独立防务意识也不断加强，意图凭借《澳新协定》将太平洋岛国纳入势力范围；二战后是地缘战略丰富阶段，在太平洋岛国发展问题日益突出和岛屿地区安全态势日趋复杂的背景下，澳大利亚实施援助战略以促进地区的繁荣与稳定。未来，澳大利亚将继续保持该地区最大援助国的地位。     

老赵的“群、带”观——记孟州市槐树国土所所长赵国政

槐树乡位于孟州市西北岭区,由原槐树乡、石庄乡合并而成,全乡72平方公里,44个行政村,23000多口人,是该市经济相对落后的乡镇。然而,就在这样一个环境,一名普通的共产党     

深海秘境的“烟囱森林”

1977年的某一天，美国科学家毕肖夫博士等3人一起乘坐“爱尔文”号潜艇下潜到了东太平洋海隆，准备在那里开展海底热泉考察。潜艇下潜到了水深2500～2700米的海底附近，在通过水下观察镜进行环境观察时，毕肖夫意外地发现，在海底的热液溢口周围，“伫立”着许许多多长柱状、短柱状的“烟囱”，乍一看，就像一片“烟囱森林”。这些烟囱，就像我们在生活中常见的那样，     

Outflow of Pacific water from the Chukchi Sea to the Arctic Ocean

Pacific water exits the Chukchi Sea shelf through Barrow Canyon in the east and Herald Canyon in the west, forming an eastward-directed shelfbreak boundary current that flows into the Beaufort Sea. Here we summarize the transformation that the Pacific water undergoes in the two canyons, and describe the characteristics and variability of the resulting shelfbreak jet, using recently collected summertime hydrographic data and a year-long mooting data set. In both canyons the northward-flowing Pacific winter water switches from the western to the eastern flank of the canyon, interacting with the northward-flowing summer water. In Barrow canyon the vorticity structure of the current is altered, while in Herald canyon a new water mass mode is created. In both instances hydraulic effects are believed to be partly responsible for the observed changes. The shelfl）reak jet that forms from the canyon outflows has distinct seasonal configurations, from a bottom-intensified flow carrying cold, dense Pacific water in spring, to a surface-intensified current advecting warm, buoyant water in summer. The current also varies significantly on short timescales, from less than a day to a week. In fall and winter much of this mesoscale variability is driven by storm events, whose easterly winds reverse the current and cause upwelling. Different types of eddies are spawned from the current, which are characterized here using hydrographic and satellite data.     

局地混合率变化对热带太平洋SST的影响

利用1个等密度面坐标大洋环流模式,研究了热带太平洋地区局地混合率变化对局地海表面温度的影响.研究表明,局地混合率的变化对热带中-东部地区以及海盆东边界处的海表面温度影响较强,而对海盆西部的海表面温度影响较弱,这些影响主要与局地温跃层的深度有关,此外海洋表层与温跃层的温度差等也会对局地海表面温度产生影响.     

三月份全国天气概况

本月西北寒而束南暧,全国除西南外均多雨泽。温度平均月温均在冰点以上,西北高原计2—4℃,渭水盆地与黄河中流在6—9℃左右,四川盆地约12°至13℃,中流约10℃,东南沿海诸省在12°至14℃之间,珠江流域且达15℃以上,龙州诸地几     

Fishery resources in arid zone mangroves in gulf of Kachchh, Gujarat, northwest coast of India

The finfish and shellfish resources were assessed quantitatively and qualitatively in regard to their abundance in creek waters at three sites within a period of two years, from January 1999 to December 2000, in the western mangrove areas of Kachchh. The catch rate varied from 0.69 to 6.99 kg h⁻¹. It was low during monsoon (July to October), which could be due to the freshwater-flow-induced salinity reduction in all the sites. Among 38 species recorded, 5 were shellfish and 33 were finfish. The spawning period of fishes was found to be during summer and early monsoon period (May to August). Surface water temperatures varied from 17 °C to 37 °C. Salinity values varied from 34 to 44 and the pH ranged between 7 and 8.9. Variation in dissolved oxygen content was from 3.42 to 5.85 mL L⁻¹. The high fishery densities in these semi arid mangrove creek areas were recorded during monsoon and early winter season.     

南京之高空

本篇所用材料,以飞机记录为限,测风气球纪录已由竺可桢朱文荣诸氏整理成篇读者可参观竺氏中国气流运行(气象研究所集刊第四号),朱氏南京高层气流观测(气象杂志十二卷P.20—30)。关于气团分析,赵九章氏中国东部空气团之分析(气象研究所集刊第六号)及朱炳海氏太平洋及其隣近之气团(象杂志十一卷P.178—183)两文,均有精详之讨论,为避免工作重复起见,本文亦未列入,文中气压与温度之相关系数,系由薛铁虎先生代为计算,谨此致谢。