本文選題：塔克拉瑪干沙漠　切入點：土壤熱擴(kuò)散率　出處：《土壤通報》2016年04期

【摘要】：利用塔克拉瑪干沙漠大氣環(huán)境觀測站2008年7月30日至8月4日的土壤溫度、濕度和土壤熱通量觀測資料,定量分析了沙漠土壤熱擴(kuò)散率、溫度、熱通量的變化規(guī)律。采用諧波法、振幅法、相位法和熱傳導(dǎo)對流法分別計算了5~20 cm沙漠土壤的熱擴(kuò)散率,在此基礎(chǔ)上,以5 cm深度的土壤層為上邊界條件,計算了10和20 cm深度的土壤溫度和8 cm深度的土壤熱通量。結(jié)果表明:諧波法計算沙漠土壤溫度的精度最高,10和20 cm深度的土壤溫度計算值與觀測值的標(biāo)準(zhǔn)誤差分別為0.167℃和0.127℃;熱傳導(dǎo)對流法對土壤溫度的計算結(jié)果好于振幅法和相位法。同樣,諧波法計算的沙漠土壤熱通量值與觀測值的誤差最小,計算值與觀測值的相關(guān)系數(shù)R2達(dá)到0.976,熱傳導(dǎo)對流法次之,振幅法和相位法的誤差最大。
[Abstract]:Based on the observation data of soil temperature, humidity and soil heat flux from July 30 to August 4, 2008, the thermal diffusivity and temperature of desert soil were quantitatively analyzed. The thermal diffusivity of 5 ~ 20 cm desert soil was calculated by harmonic method, amplitude method, phase method and heat conduction convection method respectively. On this basis, the soil layer of 5 cm depth was taken as the upper boundary condition. The soil temperature at the depth of 10 cm and 20 cm and the soil heat flux at the depth of 8 cm were calculated. The results show that the harmonic method has the highest accuracy in calculating the soil temperature at the depth of 10 cm and 20 cm and the standard error between the observed value and the calculated value of the soil temperature at the depth of 10 cm and 20 cm. 0.167 鈩，

本文編號：1682888