我国南极陨石研究的新进展   总被引：5，自引：0，他引：5  

缪秉魁  欧阳自远  林杨挺  肖龙  黄定华  何琦 《地质科技情报》2008,27(1):13-19,30

近年来,因在南极发现了大量的陨石样品,我国天体化学和陨石学研究得到了快速发展,并取得了一系列可喜的成果,如:①在南极已收集了近万块南极陨石样品,使我国已成为南极陨石拥有大国;②大量的陨石发现和研究成果表明格罗夫山地区为我国发现的新的陨石富集区,填补了我国在南极陨石领域的空白;③发现了许多我国奇缺的陨石类型,如火星陨石、CR型碳质球粒陨石等;④开展了较深入的CAI研究等.这些都将为我国天体化学和比较行星学的发展展示广阔的前景.提出了一些南极陨石研究工作中存在的问题和今后的工作方向.  相似文献   

Anomalous change of the Antarctic sea ice and global sea level change   总被引：3，自引：0，他引：3  

Xie Simei  Zou Bing  Wang Yi  Bao Chenglan 《海洋学报(英文版)》1996,15(2):193-208

ＡｎｏｍａｌｏｕｓｃｈａｎｇｅｏｆｔｈｅＡｎｔａｒｃｔｉｃｓｅａｉｃｅａｎｄｇｌｏｂａｌｓｅａｌｅｖｅｌｃｈａｎｇｅ￥ＸｉｅＳｉｍｅｉ;ＺｏｕＢｉｎｇ;ＷａｎｇＹｉａｎｄＢａｏＣｈｅｎｇｌａｎ（１．ＮａｔｉｏｎａｌＭａｒｉｎｅＥｎｖｉｒｏｎｍｅｎｔＦ...  相似文献   

南极布兰斯菲尔德海峡表层沉积物的酸解烃   总被引：1，自引：0，他引：1  

卢冰  唐运千 《海洋学研究》1996,14(3):51-59

本文研究了南极布兰斯菲尔德海峡表层沉积物的酸解烃分布特征，并佐以热释汞和蚀变碳酸盐的分析。从酸解烃中甲烷含量的低值和Ｃ１／（Ｃ２＋Ｃ３）比值，以及乙烯的存在等判断，布兰斯菲尔德海峡沉积物的烃类气体来自于生物成因。  相似文献   

第四次南极考察长城站越冬队极地海洋气象考察报告   总被引：1，自引：3，他引：1  

张文义 《海洋预报》1993,10(2):24-32

本文介绍了中国第四次南极考察队,在长城站进行气象考察期间,从获得的每日四次现场气象观测资料经统计分析,得出了1988年长城站地区气象要素分布特点。 利用长城站现场气象观测资料及接收到的地面天气图和卫星云图,开展了对长城站地区天气预报工作。并总结了影响长城站地区天气系统和出现的天气及影响长城站地区的气旋路径。对今后有关人员作好站区天气预报和科学考察工作顺利进行十分重要。  相似文献   

南极普里兹湾气旋的生消发展   总被引：3，自引：4，他引：3  

解思梅  郝春江  梅山  刘克威  魏立新 《海洋学报》2002,24(6):11-19

利用1989～2000年现场观测的气象资料,特别是自1997年以来在南极考察船上接收的NOAA卫星极轨高分辨的卫星云图,研究了普里兹湾气旋的生消发展;提出了夏季绕极气旋进入普里兹湾内也会发展加强,在湾内东风带里也能生成气旋的新观点,修正了普里兹湾仅是气旋墓地的不全面说法,从而进一步完善了南极西风带绕极气旋和东风带上气旋生消发展的理论;研究了普里兹湾冰-气-海相互作用的机理,解释了气旋发生、发展的物理过程.用整体动力学输送法计算了进入普里兹湾980205号绕极气旋爆发性发展的能量交换,指出气旋在超过冰坝进入冰间湖可以获得巨大的热量,使气旋迅速发展成为具有南极特色的强风暴,风力达12级以上,平均风速为38m/s;瞬时最大风速达100m/s.  相似文献   

Cyclone formation and development in the Antarctic Prydz Bay     

Xie Simei  Mei Shan  Liu Kewei  Wei Lixin 《海洋学报(英文版)》2002,21(1):45-54

Using meteorological data of field observation in 1990 - 2000, especially polar orbit high-resolution NOAA satellite cloud maps received from the Antarctic expedition vessel since 1997, the formation and development of the Prydz Bay cyclone are studied in this paper. Some new viewpoints are suggested such as: when surround-polar cyclone enters the Prydz Bay, it can also intensify and develop in summer; cyclone can also develop in the easterlies in this bay. These view points revise old uncom-plete view point that the Prydz Bay is a burial ground of cyclone, and also further consummate formation-development theory of surround-cyclone in the Antarctic westerlies and cyclone in the Antarctic easterlies. In this paper, the mechanism of ice-air-sea interaction in the Prydz Bay is studied, and the physical process of cyclone formation-development is explained. By use of wholly dynamic transportation method, an energy exchange case of a cyclone, which explosively developed after entering the Prydz Bay, is calcu  相似文献   

Analysis of the Sea Fog in the Sea Around the Great Wall Station,Antarctica     

黄耀荣  薛振和 《海洋通报(英文版)》2001,3(1)

The synoptic analysis of sea fog in western Antarctic sea region is made based on the observation data in the Chinese Antarctic station, Great Wall Station, from December 1994 to November 1995, and the facsimile weather charts issued by Chile. It is found that more than 90% fog in this region is the advection cooling fog. Also, the synoptic mechanism of the fog creation and distinction is discussed by analyzing the pressure field, the temperature field and the upperlevel stratification. Finally, the focus of attention in forecasting fog is pointed out.  相似文献   

南极中山站石榴石变粒岩的岩石学矿物学及其变质作用研究   总被引：1，自引：0，他引：1  

韩宗珠  且钟禹  盛兴土 《海洋科学》1992,16(3):49-53

本文报道了南极拉丝曼丘陵“中山站”石榴石变粒岩的岩石学和矿物化学特征;确定了其矿物组合及世代演化关系,利用电子探针分析了其特征变质矿物的化学组成,最后推断东南极拉丝曼丘陵地区曾发生过麻粒岩相变质作用和混合岩化作用。  相似文献   

New target-strength model indicates more krill in the Southern Ocean   总被引：5，自引：3，他引：5  

Demer  David A.; Conti  Stephane G. 《ICES Journal of Marine Science》2005,62(1):25-32

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Dissolved iron in the Australian sector of the Southern Ocean (CLIVAR SR3 section): Meridional and seasonal trends     

P.N. Sedwick  A.R. Bowie  T.W. Trull   《Deep Sea Research Part I: Oceanographic Research Papers》2008,55(8):911-925

We report measurements of dissolved iron (dFe, <0.4 μm) in seawater collected from the upper 300 m of the water column along the CLIVAR SR3 section south of Tasmania in March 1998 (between 42°S and 54°S) and November–December 2001 (between 47°S and 66°S). Results from both cruises indicate a general north-to-south decrease in mixed-layer dFe concentrations, from values as high as 0.76 nM in the Subtropical Front to uniformly low concentrations (<0.1 nM) between the Polar Front and the Antarctic continental shelf. Samples collected from the seasonal sea-ice zone in November–December 2001 provide no evidence of significant dFe inputs from the melting pack ice, which may explain the absence of pronounced ice-edge algal blooms in this sector of the Southern Ocean, as implied by satellite ocean-color images. Our data also allow us to infer changes in the dFe concentration of surface waters during the growing season. South of the Polar Front, a comparison of near-surface with subsurface (150 m depth) dFe concentrations in November–December 2001 suggests a net seasonal biological uptake of at least 0.14–0.18 nM dFe, of which 0.05–0.12 nM is depleted early in the growing season (before mid December). A comparison of our spring 2001 and fall 1998 data indicates a barely discernible seasonal depletion of dFe (0.03 nM) within the Polar Frontal Zone. Further north, most of our iron profiles do not exhibit near-surface depletions, and mixed-layer dFe concentrations are sometimes higher in samples from fall 1998 compared to spring 2001; here, the near-surface dFe distributions appear to be dominated by time-varying inputs of aerosol iron or advection of iron-rich subtropical waters from the north.  相似文献