青海湖2种高寒嵩草湿草甸湿地生态系统水热通量比较
发布时间：2018-10-25 17:34
【摘要】：基于涡度相关技术,研究了2015年青海湖2种高寒嵩草湿草甸湿地生态系统水热通量的特征。结果表明:(1)2015年青海湖高寒藏嵩草和小嵩草湿草甸湿地生态系统日平均水汽通量分别为1.74,0.99mm,年水汽通量分别为633.3,362.1mm。(2)青海湖2种高寒嵩草湿草甸湿地生态系统感热、潜热和净辐射日变化均呈单峰曲线,感热和潜热月平均日变化最大值出现的时间均晚于净辐射。藏嵩草湿草甸湿地生态系统感热月均日变化最大值最大为179.06W/m~2,最小为46.02W/m~2;潜热最大为312.55W/m~2,最小为30.58 W/m~2;小嵩草湿草甸湿地生态系统感热月均日变化最大值最大为161.86 W/m~2,最小为31.60 W/m~2;潜热最大为215.44 W/m~2;最小为14.08 W/m~2。(3)通过波文比分析发现,2种高寒嵩草湿草甸湿地生态系统生长季能量分配以潜热为主,非生长季小嵩草湿草甸湿地生态系统能量分配以感热为主,藏嵩草湿草甸湿地生态系统则较为复杂。藏嵩草湿草甸湿地生态系统全年能量平衡率为0.82,小嵩草湿草甸湿地生态系统为0.89,增加土壤热通量项能改善能量平衡状况。
[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.
【作者单位】： 青海师范大学生命与地理科学学院;青海师范大学青海省自然地理与环境过程重点实验室;
【基金】：国家自然科学基金项目(31260130) 中国科学院“西部之光”计划项目(科发人教字[2012]179号) 中国博士后基金项目(2013M542400) 教育部科学技术重点研究项目 青海省重点实验室平台建设项目(2014-Z-Y24,2015-Z-Y01)
【分类号】：S812
本文编号：2294347
[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.
【作者单位】： 青海师范大学生命与地理科学学院;青海师范大学青海省自然地理与环境过程重点实验室;
【基金】：国家自然科学基金项目(31260130) 中国科学院“西部之光”计划项目(科发人教字[2012]179号) 中国博士后基金项目(2013M542400) 教育部科学技术重点研究项目 青海省重点实验室平台建设项目(2014-Z-Y24,2015-Z-Y01)
【分类号】：S812
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