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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Microorganisms Found in the Basal Horizons of the Antarctic Glacier above Lake Vostok
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Problems of such kind arise in glaciology when one estimates the stability of snow on mountain slopes or determines the catastrophic movement of a glacier; the results can also be applied to solifluction phenomena [2, 3].
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It was assumed that the temperature at the bed of the glacier could reach the melting point due to nonstationary heating and that the conditions would be produced for motion of the glacier.
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Here we examine the nonstationary response of a glacier to small deviations of the system parameters from critical values corresponding to the stationary state.
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Numerical investigation and self-similar solutions of the glacier-ocean interaction problem
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The distribution of Abies was deeply influenced by geological events such as the uplift of Himalaya, the Alps, the Rocky Mountains, the occurrence of the Asian Monsoon as well as the Quaternary glaciers.
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The problem of stationary inner heating of cold glaciers is considered in [1, 2].
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The mathematical modeling of the heat and mass transfer processes in glaciers is an effective means of investigating and predicting their development.
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The Pechora till formed in the course of motions of glaciers from the northeast.
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The advances and retreats of glaciers and the accompanying regressions and transgressions of the ocean level caused isolation of chum salmon in the refugia belonging hypothetically to the paleo-Shuifen and paleo-Amur regions.
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These data suggest that the subspecies has been rapidly spreading northwards since the Pleistocene glaciation (about 15,000 years ago).
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In our view, microgeographic subdivision of the populations is caused by recurrent fragmentation of habitats during the Pleistocene glaciation of the Bale Massif and subsequent prolonged isolation of local populations.
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The types of mtDNA genetic variability and mismatch distribution between haplotypes in the populations indicate that the southern regions of the Sea of Okhotsk and Sea of Japan served as refugia for chum salmon during glaciation periods.
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Differences between the seasonal races of the Amur chum salmon are insignificant, and their emergence dates back to the period of the last Wisconsinian glaciation.
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Chromosomal inversion polymorphism was studied in a natural population of Drosophila subobscura from the Djerdap gorge of the Danube River, which is one of southeastern European continental refugia during the last glaciation period.
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These corresponding chalcones were reacted with phenyl hydrazide in glacial acetic acid, which led to the formation of novel 4-[5-(substituted phenyl)-1-phenyl-4,5-dihydro-1H-3-pyrazolyl]-2-methylphenol derivatives.
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15 m/ka occurred in the mono-depositional sink of the former Changjiang River mouth during 10 000-8000 aBP, when post-glacial transgression happened and the Changjiang water level remained at lower stand.
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The Role of Glacial Epochs in the Formation of Chromosomal Polymorphism in the Common Shrew Sorex araneus L.
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Lemmings of Bolshevik Island (the Severnaya Zemlya Archipelago) is a Relict of the Last Glacial Epoch
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A procedure for the determination of sodium salts of methyl sulfamic acid as tertiary amines by acidimétrie titration in glacial acetic acid was developed.
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| | Firn stratigraphic studies of glaciers in the eastern Tian Shan were carried out during the summer of 1981. | | 1981年夏天对东天山冰川进行了粒雪层研究。 本文系通过对从冰川上取得的雪-冰岩芯进行分析来解释长期气候变化的初步研究。粒雪岩芯取自博格达峰北坡D-4冰川和乌鲁木齐河源1号冰川西支,深度为表面以下2—6米,工具为手摇钻。 对冰雪样品进行了地层学描述和物理性质测量,还做了氧同位素含量分析。应用这些资料,试图就年层的估算和附加冰的形成给予地层学解释。在D-4冰川几个不同点上,发现年净平衡的在1000毫米附近变动,和以前在邻近冰川区得到的降水量相比是一个意外的值。 用花杆法在D-4冰川上测量了物质平衡,发现在最暖季节,该冰川的物质平衡与海拔高度之间具有线性关系。 | | 文摘来源 | | On glaciers in the eastern Tianshan Mountains, separate measurements of amounts of accumulation and abation are difficult, since accumulation and ablation occur simultaneously in the warm season. To estimate accumulation and ablation independently, meteorological observations around Glacier D-5 were made in summer. In comparison with air temperature on the ground, much lowering of that and smaller diurnal range were seen on the glacier. From the analysis of upper weather charts, the main cause of precipitat... | | 在东天山冰川上,积累和消融是在暖季同时发生的,故分别对积累量和消融量的测量是困难的。为了单独估算积累和消融,夏天我们在D-5冰川附近进行了气象观测。与地面气温相比较,发现冰川上气温比较低,且具有较小的日变化幅度。由高空天气图的分析可知,降水的主要原因可归结于来自极地的冷槽。固态降水发生的频数(S:%)和地面气温(T:℃)之间的关系对冰川积累很重要,这种关系(S=25T+108)可由观测结果得到。消融(a:厘米水层)和日积温(∑T:日平均气温之和,℃·日)也可由关系式(a=1.5∑T)得到。通过这些关系的应用,我们可以估算冰川上积累、消融和物质平衡。除冰川为具有高反射率的新雪所覆盖面外,计算的物质平衡和观测结果很吻合,气象条件和物质平衡与尼伯尔喜马拉雅山冰川进行了简要的比较。 | | 文摘来源 | | Preliminary structural glaciological studies of the glaciers on the north slope, of Mt. Bogda were carried out during July-August, 1981. | | 1981年7月至8月,我们对博格达北坡冰川进行了初步的结构冰川学研究。 结构要素,诸如沉积和动力结构以及冰川波动所造成的结构,分别在4号和5号冰川的表面做了观测,并绘制了这两条冰川的结构图。 4号冰川结构简单,而5号冰川则比较复杂。我们对5号冰川的内部结构分类做了尝试。 观测了这两条冰川的冰面运动和冰层中岩屑的产生。测量了5号冰川表面变形和末端位置的变化。该冰川平均日变化速度5—10厘米,从1981年的8月初到9月初其末端后退约1—3米。 | | 文摘来源 | |   | | << 更多相关文摘 |
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