【摘要】：基于渦度相關技術,研究了2015年青海湖2種高寒嵩草濕草甸濕地生態(tài)系統(tǒng)水熱通量的特征。結果表明:(1)2015年青海湖高寒藏嵩草和小嵩草濕草甸濕地生態(tài)系統(tǒng)日平均水汽通量分別為1.74,0.99mm,年水汽通量分別為633.3,362.1mm。(2)青海湖2種高寒嵩草濕草甸濕地生態(tài)系統(tǒng)感熱、潛熱和凈輻射日變化均呈單峰曲線,感熱和潛熱月平均日變化最大值出現(xiàn)的時間均晚于凈輻射。藏嵩草濕草甸濕地生態(tài)系統(tǒng)感熱月均日變化最大值最大為179.06W/m~2,最小為46.02W/m~2;潛熱最大為312.55W/m~2,最小為30.58 W/m~2;小嵩草濕草甸濕地生態(tài)系統(tǒng)感熱月均日變化最大值最大為161.86 W/m~2,最小為31.60 W/m~2;潛熱最大為215.44 W/m~2;最小為14.08 W/m~2。(3)通過波文比分析發(fā)現(xiàn),2種高寒嵩草濕草甸濕地生態(tài)系統(tǒng)生長季能量分配以潛熱為主,非生長季小嵩草濕草甸濕地生態(tài)系統(tǒng)能量分配以感熱為主,藏嵩草濕草甸濕地生態(tài)系統(tǒng)則較為復雜。藏嵩草濕草甸濕地生態(tài)系統(tǒng)全年能量平衡率為0.82,小嵩草濕草甸濕地生態(tài)系統(tǒng)為0.89,增加土壤熱通量項能改善能量平衡狀況。
[Abstract]:Based on vorticity correlation technique, the characteristics of water and heat fluxes of two alpine Kobresia humidis wetland ecosystems in Qinghai Lake in 2015 were studied. The results showed that: (1) in 2015, the average daily water vapor flux of Kobresia humidis and Kobresia humidis in alpine meadow in Qinghai Lake was 1.74 ~ 0.99mm, and the annual water vapor flux was 633.3362.1mmm. (2) the wetland ecosystem of wet meadow of Kobresia alpine in Qinghai Lake was hot. The diurnal variation of latent heat and net radiation were both single-peak curves, and the maximum of the monthly average diurnal variation of sensible heat and latent heat were both late Yu Jing radiation. The maximum diurnal variation of sensible heat in wetland ecosystem of Kobresia humidis is 179.06W / mm2, the minimum is 46.02W / mm2, the maximum latent heat is 312.55W / mm2, and the minimum is 30.58 W/ m ~ (2), and the maximum is 161.86 W / m ~ (2), the minimum is 161.86 W / m ~ (2), the maximum value is 161.86 W / m ~ (2), and the maximum value is 161.86 W / m ~ (2) in the wetland ecosystem of Kobresia humilis meadow. The maximum latent heat is 215.44 W / m ~ (2) and the minimum is 14.08 W / m ~ (2). (3) the energy distribution of the two species of alpine Kobresia humidis wetland ecosystem in growing season is mainly latent heat. The energy distribution in wet meadow wetland ecosystem of Kobresia humidis is mainly sensitive to heat, while that of Kobresia humidis wetland ecosystem is more complex. The annual energy balance rate of Kobresia humidis wetland ecosystem was 0.82, and that of Kobresia humidis wetland ecosystem was 0.89. Increasing soil heat flux can improve the energy balance.
【作者單位】： 青海師范大學生命與地理科學學院;青海師范大學青海省自然地理與環(huán)境過程重點實驗室;
【基金】：國家自然科學基金項目(31260130) 中國科學院“西部之光”計劃項目(科發(fā)人教字[2012]179號) 中國博士后基金項目(2013M542400) 教育部科學技術重點研究項目 青海省重點實驗室平臺建設項目(2014-Z-Y24,2015-Z-Y01)
【分類號】：S812

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