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alaskan arctic
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     MICRO FAUNA IN BOREHOLE AB-67 AND ITS PALAEO ENVIRONMENTAL SIGNIFICANCE IN BARROW,ALASKAN ARCTIC
     阿拉斯加巴罗地区AB-67钻孔的微体动物群及其古环境意义
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  “alaskan arctic”译为未确定词的双语例句
     ENVIRONMENT GEOCHEMICAL CHARACTERISTICS IN BARROW, ALASKAN ARCTIC
     北极阿拉斯加巴罗地区现代环境的地球化学特征研究
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     CLIMATIC AND ENVIRONMENTAL CHANGES OVER THE PAST 450 YEARS RECORDED IN ELSON LAGOON AT BARROW,ALASKAN ARCTIC
     北极巴罗Elson湖过去450年气候与环境变化记录
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  相似匹配句对
     ENVIRONMENT GEOCHEMICAL CHARACTERISTICS IN BARROW, ALASKAN ARCTIC
     北极阿拉斯加巴罗地区现代环境的地球化学特征研究
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     The Melting Arctic
     消融的北极——阿拉斯加极地文化的衰落
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     The Freezing Arctic
     冰封的北极——格陵兰人的传统极地生活
短句来源
     MICRO FAUNA IN BOREHOLE AB-67 AND ITS PALAEO ENVIRONMENTAL SIGNIFICANCE IN BARROW,ALASKAN ARCTIC
     阿拉斯加巴罗地区AB-67钻孔的微体动物群及其古环境意义
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  alaskan arctic
Some observations of the local wind regime on an alaskan arctic glacier
      
Snow cores were collected over sea ice from four northwest Alaskan Arctic estuaries that represented the annual snowfallfrom the 1995-1996 season.
      
While SO2 exceeded 10 ppbv in an exceptional haze layer in the Alaskan Arctic, sulfur dioxide was sometimes in the 1 - 5 ppbv range when the haze was absent.
      
Cascade impactor samples were collected over the Alaskan Arctic during the first three research flights of AGASP-II.
      
The haze observed in the Canadian Arctic was well-aged and mixed throughout the troposphere in concentrations well below those observed during the previous weeks in the Alaskan Arctic.
      
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A60cm depth core of about 450 years old was drilled from Elson Lagoon in Barrow, Alaskan Arctic(70°21’N, 156°40’W)in the August,1994.The drilling site was located in a water Of 2m deep and was 1.5km away from coast.About 50 samples with intervals of 1-2cm were taken from the core to analyze the micro-fauna.Based upon the distribution properties,8 genera and 13 species of foraminifera were identified and three assemblages were distinguished:(1) At the lower part(35?60cm) of the borehole AE-67 Assemblage...

A60cm depth core of about 450 years old was drilled from Elson Lagoon in Barrow, Alaskan Arctic(70°21’N, 156°40’W)in the August,1994.The drilling site was located in a water Of 2m deep and was 1.5km away from coast.About 50 samples with intervals of 1-2cm were taken from the core to analyze the micro-fauna.Based upon the distribution properties,8 genera and 13 species of foraminifera were identified and three assemblages were distinguished:(1) At the lower part(35?60cm) of the borehole AE-67 Assemblage Elphidium orbiculareElphidium clavatum were distributed,in which the in which the dominant species were Elphidium orbiculare,E.clavatum, E.bartletti,Buccella frigida,et al.,without gluey shell foraminifera;(2) Assemblage buccella frigida-Ammotium cassis were found in the middle part(19 5cm)of the core;(3) Assemblage Elphidium asklundi-Elphidium excavatum alba were in the upper part(019cm)of the core. 9 general and 9 species of ostracoda were identified too,which can be divided into two assem blages:(1) Assemblage Limnocythere sp.-Normanicythere leioderma which were distributed In the lower section(31?60cm)of the core and were characterized by existence of both maritime and ter restrial ostracoda;(2) Assemblage Cytheromorpha macchesneyi were distributed in the upper section(0?31cm)of the core.Based upon the assembled characters and ecological features of the microfauna in the borehole AB-67,environmental changes in Barrow,Alaska in the past 450 years can be recognized as follows:(1)Before 1740 AD(e.g.from the mid of the 16th century to the 18th century),It was rela tively cold and in a low sea level stage,which were concluded by the existence of both marine and non-marine micro-fauna.The non-marine ostracoda indicates a lake-stream deposition environment with fresh-brackish water.The marine micro-fauna was likely eurythermal and euryhaline forms,so the drilling site was estimated to be located at a river mouth or in a tidal zone near the coast and the sea level might be 2.5m lower than that of the present between the mid-16 century and mid-18 cen tury,which coincided with a little ice age.(2) From mid-18 century to mid-19 century,it was becoming warmer and a slight transgres sion commenced.(3)From mid-19 century to present,it as warming,accompanied by continuous transgression.

根据对AB-67钻孔岩芯中微体动物群的分析,本文讨论了北极阿拉斯加巴罗地区过去450年的气候环境变迁历史。

This paper deals with the characteristics and distribution of recent Ostracoda in surface sediments in the coastal zone at Barrow, the northwest Alaskan Arctic. A total of 10 species of ostracods belonging to 6 genera from 19 samples collected from Barrow area have been identified. There are two types of ostracods, marine and non marine ostracods living in this area. The marine ostracods Cytheromorpha macchesneyi (Brady et Crosskey), Paracyprideis pseudopunctillata Swain, Heterocyprideis sorbyana...

This paper deals with the characteristics and distribution of recent Ostracoda in surface sediments in the coastal zone at Barrow, the northwest Alaskan Arctic. A total of 10 species of ostracods belonging to 6 genera from 19 samples collected from Barrow area have been identified. There are two types of ostracods, marine and non marine ostracods living in this area. The marine ostracods Cytheromorpha macchesneyi (Brady et Crosskey), Paracyprideis pseudopunctillata Swain, Heterocyprideis sorbyana (Jones), Rabilimis septentrionalis (Brady), Elofsonia susitnensis Forester and Brouwers, Cytheromorpha knikensis Forester and Brouwers and Cytheromorpha sp. are eurysaline and shallow water species, living in frigid and sub frigid climatic zones. The non marine ostracods Candona lactea Baird, Candona hyalina Brady and Robertson and Candona candida (Müller) are cold water species, mainly living in fresh water, of which Candona lactea can live in a slightly brackish water. Salinity and major ion composition of water bodies are the important environmental parameters which influence the occurrence and distribution of recent and non marine ostracods. Major dissolved ions of water bodies in Barrow area are Na + and Cl -. Based upon the distribution of recent ostracods, four assemblages in Barrow area can be distinguished: (1) Lagoon ostracod assemblage represented by Paracyprideis pseudopunctillata. (2) Estuarine ostracod assemblage by Elofsonia susitnensis. (3) Riverine ostracod assemblage nearby the estuary represented by Candona lactea and Elofsonia susitnensis , an assemblage mixed with marine and non marine ostracods. (4) Lake ostracod assemblages represented by Candona hyalina and Candona lactea. These four ostracod assemblages imply a decrease in salinity and marine influence from the sea to the inland.

本文主要对北极阿拉斯加巴罗地区海岸带中的现代介形类动物群特征及其生态环境进行了探讨 ,其中在盐度为 0 .15 7— 4.41g/l的河口和近河口段的河流沉积中发现 Elofsonia susitnensis Forester et Brouwers和 Cythero-morpha knikensis Forester et Brouwers的活体。据报道 ,这两种介形类活体过去见于 5 9°— 6 1°N、盐度为 1.112—32 .5 g/l的阿拉斯加湾及其沿岸带 ,在白令海、波弗特海未见及。作者在纬度更北、盐度更低的水域发现它们 ,这对北极介形类动物群研究以及控制介形类分布的环境参数的研究都提供了新认识。同时根据介形类分布特征 ,划分出 4个介形类生态组合

 
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