【摘要】 为了探讨气候变化的规律和原因，于１９９７－０７～０９期间，在藏北高原不同地点分别建立了自动气象站和埋设了土壤温度、湿度观测系统．土壤温度观测数据表明，在６０ｃｍ以上土壤温度均存在着明显的时间变化，其变化为正弦曲线，与太阳辐射的时间变化一致．但存在着不同的时间滞后．地表状况、土壤干湿程度及土壤组分等的差异对土壤温度的时间变化振幅及热通量有影响．在藏北高原，由于挖坑埋设探测仪器等对土壤温度场的扰动可在５ｄ左右的时间内基本消除更多还原

【Abstract】 In order to investigate the patterns and the reasons of the climate change,the automatic weather stations(AWS) and the soil moisture and temperature measurement systems (SMTMS) were installed in the northern part of the Tibetan Plateau during July to september,1997.The observation data of the soil temperature system showed that above 60cm the diurnal variation of the soil temperature is evident.The diurnal variation is consistent with that of the radiation of sun.The diurnal variations are sinusoidal functions.But there exist different time lags in different cite.The surface condition,the dry/wet extent of the soil and the soil components have affected the amplitude of the diurnal variation of the soil temperature and heat flux.In the northern part of the Tibetan Plateau,the turbulence of the soil temperature due to the digging holes to install the observation instruments can be eliminated mainly in 5 days.更多还原