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青藏高原多年冻土区
释义
青藏高原多年冻土区
Encyclopedia
理学
中国的冻土
释
permafrost region of Qingzang Gaoyuan
青藏高原多年冻土区
世界中、低纬度地带海拔最高(平均4000米以上)、面积最大(150万平方千米)的冻土区。年均温度最低-5~-4℃,冻土厚度达一二百米;地温年变化深度由6~17米;细颗粒冻土层温度比粗颗粒土低,在高原上要差1~3℃。
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optical field induced birefringence
optical field, light field
optical film
optical filter
optical flame fire detector
optical flare
optical flash
optical flat
optical flatness
optical flight control
optical flow
optical flow navigation
optical focal points
optical Fourier analysis
optical Fourier transform
optical frequency
optical frequency comb
optical frequency comb generator
optical frequency domain analyzer
optical frequency doubling
optical frequency measurements
optical frequency mixing
optical frequency standard
optical functional composites
optical functional materials
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