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利用塔克拉玛干沙漠北缘流动沙漠—古河床过渡带肖糖地区2012年6—8月土壤40 cm深处CO_2 浓度和相关气象要素资料,对该区域的土壤CO_2 浓度变化特征及影响因子进行了分析。结果表明:(1)肖塘地区夏季土壤40 cm深处CO_2 浓度的日变化过程中呈现出夜间低、白天高的单峰型,日最高值出现在18:00左右,最低值出现在6:30左右,浓度平均值保持在506.97~518.14 ppm之间;(2)随着土壤温度和土壤湿度的变大,土壤CO_2 浓度增大,两者呈显著正相关;(3)风速和土壤CO_2 浓度之间存在一定的滞后性;(4)大气压力对土壤CO_2 浓度变化产生显著影响,两者呈负相关。
Based on the CO_2 concentration at 40 cm depth and the related meteorological data in Shallow Sugar Loam Area of Shallow Sugar River in the northern part of the Taklamakan Desert during the period from June to August in 2012, the characteristics and influencing factors of soil CO_2 concentration in the area were analyzed. The results showed as follows: (1) The diurnal variation of CO_2 concentration at 40cm in summer in Xiaotang showed a single peak with low night and daytime. The daily maximum appeared at about 18:00, while the lowest appeared at 6: (2) With the increase of soil temperature and soil moisture, the concentration of soil CO 2 increased significantly, and the two showed a significant positive correlation; (3) The wind speed and soil CO 2 concentration (4) Atmospheric pressure had a significant effect on the change of soil CO2 concentration, and the two were negatively correlated.