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Petrological characteristics of the sedimentary volcaniclastic rocks of the Fossil Hill Formation （eocene） in King George Island， West Antarctica 总被引：1，自引：0，他引：1 
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下载免费PDF全文 薛耀松,沈炎彬,卓二军ＰｅｔｒｏｌｏｇｉｃａｌｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｔｈｅｓｅｄｉｍｅｎｔａｒｙｖｏｌｃａｎｉｃｌａｓｔｉｃｒｏｃｋｓｏｆｔｈｅＦｏｓｓｉｌＨｉｌｌＦｏｒｍａｔｉｏｎ（ｅｏｃｅｎｅ）ｉｎＫｉｎｇＧｅｏｒｇｅＩｓｌａｎｄ,Ｗ... 相似文献
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An emergy evaluation of the seven years’development of Qianyanzhou ecological experimental station 总被引：1，自引：0，他引：1
YAN Maichao Commission for Integrated Survey of Natural Resources Chinese Academy of Sciences Beijing CHINA H T O dum Center for Environmental Policy Department of Environmental Engineering Sciences University of Flori Gainesville 《地理学报(英文版)》1998,(3)
ＩＢａｃｋｇｒｏｕｎｄｏｆＥｓｔａｂｌｉｓｈｉｎｇＱｉａｎｙａｎｚｈｏｕＥｘｐｅｒｉｍｅｎｔａｌＳｔａｔｉｏｎＣｈｉｎａｉｓａｃｏｕｎｔｒｙｗｉｔｈａｈｕｇｅｐｏｐｕｌａｔｉｏｎｏｆｌ２ｂｉｌｉｏｎ,ｙｅｔ,ｉｔｉｓｓｔｉｌｉｎｃｒｅａｓｉｎｇｗ... 相似文献
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Joseph Shalhevet 《干旱区地理》2000,(2)
1 Ｂａｃｋｇｒｏｕｎｄ1.1 ＣｌｉｍａｔｅＴｈｅｎｏｒｔｈｗｅｓｔｐｒｏｖｉｎｃｅｏｆＸｉｎｊｉａｎｇｈａｓｔｈｅｌａｒｇｅｓｔｓｕｒｆａｃｅａｒｅａ(ａｂｏｕｔ1.6ｍｉｌｌｉｏｎｋｍ2)ａｎｄｓｏｍｅｏｆｔｈｅｍｏｓｔａｒｉｄｃｌｉｍａｔｅｓｉｎＣｈｉｎａ.Ｔｈｅａｖｅｒａｇｅｐｒｅｃｉｐｉｔａｔｉｏｎｏｖｅｒｔｈｅｌｏｗｌａｎｄｓ(ｔｈｅｔｗｏｍａｊｏｒｂａｓｉｎｓ—ｕｎｇｇａｒａｎｄＴａｒｉｍ),ｗｈｉｃｈｏｃｃｕｐｙ60%ｏｆｔｈｅｌａｎｄａｒｅａｏｆＸｉｎｊｉａｎｇ,ｉｓａｂｏｕｔ30ｍｍ,ｗｈｉｌ… 相似文献
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ＬｏｃａｔｅｄａｔｔｈｅｓｏｕｔｈｅａｓｔｅｒｎｃｏａｓｔｏｆＣｈｉｎａ,Ｆｕｊｉａｎｗａｓｏｎｅｏｆｔｈｅｐｒｏｖｉｎｃｅｓｗｈｉｃｈｗｅｒｅｅａｒｌｉｅｒｏｐｅｎｅｄｔｏｎａｖｉｇａｔｉｏｎａｎｄｈａｄｔｒａｄｅｒｅｌａｔｉｏｎｓｗｉｔｈｔｈｅｗ... 相似文献
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本文报道了 1 988年 6 - 1 2月 (结冰期 )南极长城站附近海区冰藻色素的分离、鉴定结果。探讨了该海区冰藻色素的种类组成 ,季节变化以及冰藻色素在海洋生态系中的作用。结果表明 ,该海区冰藻已分离出色素 1 5种 ,可鉴定的有 1 3种 ,分别为 :胡萝卜素 ,脱镁叶绿素 a,叶绿素 a、b、c,叶黄素 ,岩藻黄质 ,脱植基叶绿酸 a,紫黄质 ,脱镁叶绿素 c,叶绿酸 a,叶绿素 c的衍生物 ,di-adinoxanthin,二种色素未能鉴定。该海域冰藻色素具明显的季节变化。 相似文献
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本文报道了１９９１／１９９２年南极夏季在普里兹湾邻近海域浮游植物调查的研究结果。经鉴定共有浮游植物３门２６属７８种；其平均细胞丰度为１２０±１７４×１０５个／ｍ３，密集区分布在６２°Ｓ、７８°～１０３°Ｅ，这一海域其细胞丰度在１１０×１０５～８６４×１０５个／ｍ３之间。根据浮游植物种类组成和细胞丰度百分比的聚类分析，测区浮游植物群落中可划分为四个聚合类群：菱形藻（Ｎｉｔｚｓｃｈｉａ）与赖氏针杆藻（Ｓｙｎｅｄｒａｒｅｉｎｂｏｌｄｉ）、长环毛藻（Ｃｏｒｅｔｈｒｏｎｃｒｉｏｐｈｉｌｕｍ）与翼根管藻（Ｒｈｉｚｏｓｏｌｅｎｉａａｌａ－ｔａ）和翼根管藻与赖氏针杆藻占优势的聚合类群及由海冰习性的菱形藻与近岸性角刺藻（Ｃｈａｅｔｏｃｅｒｏｓ）占优势组成的中山站近岸单一生态类群。文中还讨论了浮游植物丰度与环境因子的关系并对过去数年南极浮游植物的调查结果进行了比较 相似文献
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《Polar Science》2014,8(1):10-23
This study compares the common harmonic constants of the O1, K1, P1, Q1, M2, S2, N2, and K2 tidal constituents from eight global and four regional tide models with harmonic constants from satellite altimeter and tide gauge data for the northern region of the Antarctic Peninsula (58°S–66°S, 53°W–66°W). To obtain a more representative comparison, the study area was divided into three zones with different physical characteristics but similar maximum tidal amplitude variations: Zone I (north of 62°S), Zone II (south of 62°S and west of the Antarctic Peninsula), and Zone III (between 62°S and 64.3°S, and east of 58.5°W). Root sum square (RSS) values are less than or equal to 3.0, 4.2, and 8.4 cm for zones I, II, and III, respectively. No single model shows superior performance in all zones. Because there are insufficient satellite altimetry observations in the vicinity of Matienzo Base (64.9761°S, 60.0683°W), this station was analyzed separately and presents the greatest values of both root mean square misfit and RSS. The maximum, minimum, and average amplitude values of the constituents that follow in importance after the eight common tidal constituents, and which have amplitudes greater than 1 cm, are also analyzed. 相似文献
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根据 1 999年 7月至 8月我国首次北极科学考察期间“雪龙”号考察船在楚科奇海 ( 66°0 .3′N75°1 8.6′N ,1 5 3°36.5′W 1 74°5 9.5′W )和白令海 ( 5 5°5 9.8′N66°0 .3′N ,1 73°2 1 .1′E1 75°5 3.9′W)采集的 5 1份网采样品和 2 4份水采样品 ,鉴定浮游植物 3个门类 38属 1 2 1种 (含变种和变型 ) ,都是真核藻类。其中楚科奇海有 33属 1 0 3种 ,白令海有 2 5属 71种 ,两海区共有种 49种。这些种类可分为 4个生态类群 :( 1 )北极类群 ;( 2 )北极、亚北极北方类群 ;( 3)北方温带类群 ;( 4 )世界性广温类群等。主要优势种有楚科奇海的格鲁菱形藻 (Nitzschiagrunowii)、诺登海链藻(Thalassiosiranordenskioldi)和聚生角毛藻 (Chaetocerossocialis)等和白令海的西氏细齿状藻(Denticulaseminae)、柔弱菱形藻 (Nitzschiadilicatissima)、成列菱形藻 (N .seriata)和长海毛藻(Thalassiothrixlongissima)等。楚克奇海浮游植物的平均丰度 ( 8.32× 1 0 7个 /m3)远高于白令海( 1 .5 8× 1 0 6个 /m3)。文中还讨论了调查区浮游植物的分布特点及其与环境的关系。 相似文献
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PRELIMINARY REPORT ON THE PELAGIC POLYCHAETES FROM THE SOUTH SHETLAND ISLANDS,BISCOE ISLANDS AND THEIR VICINITIES 下载免费PDF全文
下载免费PDF全文 《极地研究》1990,1(1):20-26
The structure of the ice core varies with depth, Its surface layer is firn, followed by an ice layer with random fabric pattern (beginning at 28m depth), then transformed to a small circle girdle pattern (beginning at 147 m depth) through a transition layer, finally to a single-maximum pattern (beginning at 191 m depth). The stratigraphic profile of the ice core is similar to those of other cores on the Law Dome, For BHQ located in the middle of a flow line from the summit to the coast, the initial depth of every specific layer is less than that in the upstream and larger than that in the downstream. The ice was analyzed for trace elememts using instrumental neutron activation technique. No tendency towards a systematic increase or decrease in the element concentrations in the past 4000 years has been found. The mean concentrations of Na and Al over the past 4000 years are higher than those in the Vostok ice core by factors of 9 and 4, respectively. 相似文献
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利用南极长城站（６２°１３′Ｓ，５８°５８′Ｗ）频高图和磁照图研究了１９８９年３月１３日磁暴的亚极光区电离层效应。在紧接着磁暴急始后Ｆ层的虚高ｈ′Ｆ急剧上升，临频ｆ０Ｆ２急剧下降，然后出现扩展Ｆ并持续几小时。在磁暴主相，电离层出现严重的吸收，但有时仍能观测到ｈ′Ｆ的增加和伴随着的ｆ０Ｆ２的降低。在磁暴急始后的第二和第三个晚上观测到极光型Ｅｓ和夜间Ｅ层，其峰值电子浓度高达７．５×１０５ｅｌ／ｃｍ３，文中讨论了造成这些现象的原因。在同一经度扇区的４个电离层站的ｈ′Ｆ和ｆ０Ｆ２的行为表明，观测站的纬度越高出现的吸收越严重，ｆ０Ｆ２呈下降的时间越长。 相似文献