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seasonal frozen
相关语句
  季节冻土
    Annual Change and Abrupt Change of the Seasonal Frozen Soil in Xinjiang,China during 1961-2002
    1961—2002年新疆季节冻土多年变化及突变分析
短句来源
    Annual mean ground temperature increases about 0.3~0.7℃ in island permafrost and seasonal frozen ground areas ,and about 0.1~0.4℃ in predominantly continuous permafrost area.
    岛状多年冻土和季节冻土区年均地温升高约0 3~0 7℃,大片连续多年冻土区升幅较小,为0 1~0 4℃。
短句来源
    Analysis of the Cause of the Differentia in Interannual Variation BetweenSnow Cover and Seasonal Frozen Soil in the Tibetan Plateau
    青藏高原冬春积雪和季节冻土年际变化差异的成因分析
短句来源
    Accordin g to the type of seasonal freezing,the seasonal frozen ground can been divided into intergradati on,semi -intergradation,long -term stability and stability.
    按季节冻结类型可把黑龙江省季节冻土分为过渡型、半过渡型、长期稳定型和稳定型等类型。
短句来源
    In this paper the cause of the differentia in interannual variation between snow cover and seasonal frozen soil in the Tibetan Plateau is analyzed by using conventional meteorological observations in 72 stations, including daily snow depth, frozen soil depth, air temperature, precipitation and ground surface temperature.
    利用青藏高原上72个常规气象观测站的逐日积雪厚度、冻结深度、气温、降水和地表温度资料,分析了高原积雪和季节冻土年际变化差异的原因.
短句来源
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  “seasonal frozen”译为未确定词的双语例句
    In this paper, the data of the average and maximum depths of seasonal frozen earth and the frozen duration of soil at 10 cm in depth in Xinjiang during the 40-year period of 1961~2002 are analyzed.
    根据对新疆40年(1961-2002年)冬季平均冻土深度、最大冻土深度、土壤10cm深度封冻时段资料分析表明.
    Analysis on the Multi-annual Change and Saltation of Seasonal Frozen Earth in Xinjiang
    新疆季节性冻土多年变化及突变分析
    It is not cold enough to form permafrost. According to the temperature measurement from pits and boreholes (in July 1992), the ground temperature is 5 0~8 4℃ in the depth of 1 0~2 2 m, and shallow ground water temperature is 6 0~7 8℃. The seasonal frozen depth is 1 0~2 0 m.
    据1992年7月间试坑和钻孔测温,在1.0~2.2m深处地温为5~8.4℃,浅层地下水温6.0~7.8℃,由此判断不存在多年冻土,季节冻结深度为1.0~2.0m。
短句来源
    The Feature of Seasonal Frozen Soil in Qinghai Tibet Plateau
    青藏高原季节性冻土年际变化的异常特征
短句来源
    The forever frozen soil turning to be seasonal frozen soil will trigger mud\|rock flow, subsiding, landslide and drumlin, and probably destroy the cold region ecosystem and construction of engineering.
    多年冻土向季节性冻土转化 ,冻融变化的交替作用将引发泥石流、滑塌、滑坡、冰锥等一系列灾害 ,给寒区工程和生态系统造成破坏 ;
短句来源
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  seasonal frozen
According to the spatial distribution of the third loading eigenvectors of (Ts-Ta) over the Qinghai-Xizang Plateau in cold season, the permafrost response region and the seasonal frozen ground response region are identified.
      
Seasonal frozen ground occurs in large parts of the territory in northern China, including Northeast, North, Northwest China and the Tibetan Plateau except for permafrost regions, and accounting for about 55% of the land area of China.
      
The seasonal frozen soil on the Qinghai-Tibet Plateau has strong response to climate change, and its freezing-thawing process also affects East Asia climate.
      
Anomaly feature of seasonal frozen soil variations on the Qinghai-Tibet Plateau
      
Permafrost with MAGT higher than-2°C will turn into seasonal frozen soils and even unfrozen soils.
      
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The seasonal freeze-thaw action is one of important external agencies and inducing factors of slope deformation, failure in the north-west of China. It cause not only failure on the surface of slope strongly, but also the frozen perched water effect in the depth of slope. The effects are: 1) collect the groundwater 2) enlarge the soften range of soil mass 3) increase the dynamic and hydrostatic pressure It impels the large scale entire deformation, failure of slope as well as collapse, landslide....

The seasonal freeze-thaw action is one of important external agencies and inducing factors of slope deformation, failure in the north-west of China. It cause not only failure on the surface of slope strongly, but also the frozen perched water effect in the depth of slope. The effects are: 1) collect the groundwater 2) enlarge the soften range of soil mass 3) increase the dynamic and hydrostatic pressure It impels the large scale entire deformation, failure of slope as well as collapse, landslide. So the freeze-thaw season is also the frequency duration of serious landslides hazards in this area. Therefore, the research on the seasonal freeze-thaw action and the entire deformation, failure of slope will be great helpful to monitor, forecast and protect the hazards of collapses and landslides in this area.

季节性冻融作用是斜坡变形破坏的重要外动力因素和促发因素之一,不但在斜坡表层产生强烈作同,而且可引起斜坡深处地下水富集,土体软化范围扩大,静、动水压力增大等冻结滞水效应,促使斜坡整体性大规模变形破坏,促发崩塌、滑坡发生,冻融季节也是重大滑坡灾害的多发时期。研究季节性冻融作用与斜坡整体变形破坏,将有助于崩塌、滑坡灾害的监测预报和防治。

Based on the mean monthly ground temperature during the past 30 years from the 71 meteorological stations in northeastern China, the mean annual maximum depths of seasonal freezing at each station are determined by the ground freezing curve, and the mean annual ground temperatures (tξ) at those depths are calculated. Good correlations exist among tξ, the mean annual air temperature (ta), the mean annual range of air temperature (Aa) and the mean annual maximum snow depth in Jan. (hs). The tξ shows...

Based on the mean monthly ground temperature during the past 30 years from the 71 meteorological stations in northeastern China, the mean annual maximum depths of seasonal freezing at each station are determined by the ground freezing curve, and the mean annual ground temperatures (tξ) at those depths are calculated. Good correlations exist among tξ, the mean annual air temperature (ta), the mean annual range of air temperature (Aa) and the mean annual maximum snow depth in Jan. (hs). The tξ shows positive correlation with ta and hs respectively, but tξand Aa show negative correlation. By the study on tξ, the ground temperature ranges in each permafrost zone are given and the complexity of permafrost temperature and permafrost distribution are delineated. The research results lead us to hold the opinion that in the northeastern permafrost region, the seasonal freezing and thawing processes belong mainly to the transitional and semi-transitional type, which is sensitive to the environmeatal changes and the temperature transitions from 0℃ occur easily. According to the relationship of permafrost distribution to air and ground temperature, the possible changes of permafrost under the influence of climate warming is estimated in this paper. The permafrost southern limit has retreated by 20-30 km northward for the past 100 years with a temperature rise of 0.7℃. Consequently, if the air temperature rises by 1 ℃ gradually until the middle of next century, the southern limit will retreat by 80-200 km northwardly and 32% of the present permafrost will disappear. Given a temperature rise of 3℃ until the end of next century, the permafrost southern limit will drawback to the north of Da Hinggan Ling, and only 36% of the present permafrost will be preserved then. This paper also points out the need of researches on the time lag of permafrost changes and the even stronger developping processes of some permafrost phenomena under the climate warming.

根据我国东北部71个气象台站近30a各深度的月平均地温值,通过绘制冻结过程线,寻找出各站多年平均最大季节冻结深度值,并算出该深度处多年平均温度值(t(?))。分别建立(t(?))与多年平均气温、与多年平均气温较差的相关关系,并进行t(?)与气温、较差和多年平均1月最大积雪深度间的多元回归分析。借助关系式及基于以往对冻土温度状况的认识,划出各冻土分带的地温范围,勾画出各冻土带内冻土温度和分布的复杂状况。以冻土分布与气温和地温关系为基础,探讨在气候持续变暖情况下东北各冻土分带界线及南界的可能变动。

The climate in the Qinghai-Xizang Plateau has been becoming warmer since the late 1970's. The obvious warmer winter and smaller annual range of air temperature have resulted in a regional permafrost degradation in the pla teau. The evidences which include the decrease of seasonal thawing depth, increase of seasonal freezing depth and the thawed layer are found between the active layer and the underlain permafrost in the regions near the permafrost lower altitudinal limit or near taliks. The ground te mperatures...

The climate in the Qinghai-Xizang Plateau has been becoming warmer since the late 1970's. The obvious warmer winter and smaller annual range of air temperature have resulted in a regional permafrost degradation in the pla teau. The evidences which include the decrease of seasonal thawing depth, increase of seasonal freezing depth and the thawed layer are found between the active layer and the underlain permafrost in the regions near the permafrost lower altitudinal limit or near taliks. The ground te mperatures from surface to 40 m depth, especially to 20 m depth, have been affected by the climate warming in various degrees. Comparision of the ground temperature in the past 15-20 years shows that the mean annual ground temperatures rise about 0.3-0.5℃ in the regions of seasonal frozen ground, river taliks and island permafrost regions where ice content of soil is relatively small. In the regions underlain continuously by permafrost, the mean annual ground temperature rises about 0.1-0.3 ℃. According to the research results of climate prediction and taking the man-made factors into consideration, the permafrost changes in the following 50 years are estimated in the paper. Given a 1 ℃ air temperature warming in another 50 years, the mean annual ground temperature in the permafrost region will increase by about 0.4-0.5 ℃ ; the lower limit of permafrost will rise about 150- 200 m; most of the present permafrost of which the thickness is less than 10 m will be melted; the main body of the present island permafrost will disappear, leaving traces of frozen ground lay deeply under the ground surface (of which the upper table will be deeper than 10 m); and the total area of permafrost will diminish dramastically.

青藏高原从70年代后期气温持续转暖,造成高原多年冻土呈区域性退化状态,已不同程度地影响到40m深以上的地温,特别是20m以上的浅层地温最为明显。近15~20a以来地温对比表明,高原上季节冻土区,河流融区及岛状冻土区内含冰(水)量较小的地段,年平均地温升高0.3~0.5℃,大片连续多年冻土区内上升0.1~0.3℃。另外,考虑高原气候变化趋势及人为因素的影响对未来50a高原多年冻土进行预测。

 
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