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permafrost region of northeast China
释义
permafrost region of northeast China
Encyclopedia
理学
中国的冻土
释
permafrost region of northeast China
东北多年冻土区
位于欧亚大陆多年冻土区的南缘地带,面积约39万平方千米,介于北纬46°30′~53°30′,海拔几百米至1000米上下。冻土年均温度(指地温年变化层底部的温度)大多在-1.5~0℃,最低-4.2℃;地温年变化深度12~16米。冻土厚度亦随纬度降低而减小,大多在50米以下,最厚达百米。
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point contact tunneling
point control
point convective model
point coordinate
point coordination function
point coordination function, PCF
point core
point-countable
point-countable base
point counter tube
point counting in dense input
point counting in sparse input
point covering
point cube
point curve
point cusp
point cut
point cutset
point defect
point deletion
point density
point dipole
point discharge
point disclination
point distance
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