温性荒漠草原生长季光伏电站地表能量交换特征  

Surface energy exchange characteristics of photovoltaic power station in warm desert steppe in growing season

作　　者：王世婷 章妮 陈克龙[2,3,4] 杜岩功 Shiting Wang;Ni Zhang;Kelong Chen;Yangong Du(College of Geographical Sciences,Qinghai Normal University,Xining 810008,China;Key Laboratory of Natural Geography and Environmental Processes of Qinghai Province,Qinghai Normal University,Xining 810008,China;Key Laboratory of Surface Processes and Ecological Protection on the Qinghai-Tibet Plateau of the Ministry of Education,Qinghai Normal University,Xining 810008,China;Qinghai Lake Wetland Ecosystem National Observation and Research Station in Qinghai Province,Haibei 812300,Qinghai,China)

机构地区：[1]青海师范大学地理科学学院,青海西宁810008 [2]青海师范大学青海省自然地理与环境过程重点实验室,青海西宁810008 [3]青海师范大学青藏高原地表过程与生态保护教育部重点实验室,青海西宁810008 [4]青海青海湖湿地生态系统国家定位观测研究站,青海海北812300

出　　处：《中国沙漠》2024年第6期249-257,共9页Journal of Desert Research

基　　金：第二次青藏高原综合科学考察项目(2019QZKK0405);青海省重点研发与转化计划项目(2022-QY-204);青海省科技计划项目(2023-ZJ-905T)。

摘　　要：光伏区地表能量通量特征及其与环境因素的相关性逐渐成为重要的研究课题。为了揭示温性荒漠草原光伏区的能量动态变化过程及其对环境因子的响应,以青海省共和县塔拉滩光伏建设下温性荒漠草原生态系统为研究对象,采用涡度相关技术,对生长季能量通量的分配特征以及调控因素进行研究。结果表明:在日尺度上,净辐射(R_(n))、潜热通量(LE)、感热通量(H)和土壤热通量(G)均显示出单峰模式。其中,R_(n)、LE和G的月均值在7月达到最高峰,而H则在10月达到峰值。R_(n)的月通量均值最高,而G的月均值最低。除了H在10月末有上升趋势外,R_(n)、LE和G在此之后均呈现下降趋势。观测期间能量分配显示LE的主导期相对更长,能量闭合比率为71%。在观测期内,LE、H、G主要受R_(n)的影响,其次为土壤含水量和空气温度,其中G对R_(n)的反应更敏感(路径系数为0.93)。土壤含水量对LE正向调控(0.18),而对H表现出负向调控(-0.26)。饱和水汽压差对LE的贡献度显著高于H,同时空气温度间接影响LE,但对H则产生直接影响。除R_(n)外,G还受到空气温度的正向作用(1.52)。The exchange of matter and energy between earth and air can guide the function and stability of local ecosystem.In order to reveal the dynamic change process of energy in the warm desert steppe in the photovoltaic area and its response to environmental factors,this study took the warm desert ecosystem under the photovoltaic construction in Talatan,Republican County,Qinghai Province as the research object,and adopted vortex-correlation technology to study the change characteristics and regulatory factors of energy flux and distribution in the growing season.The results show that net radiation(R_(n)),latent heat flux(LE),sensible heat flux(H)and soil heat flux(G)all show a unimodal pattern on the daily scale.Among them,the monthly mean values of Rn,LE and G reached their peak in July,while H reached its peak in October.R_(n) has the highest mean monthly flux,while G has the lowest.In addition to H's upward trend at the end of October,R_(n),LE and G all showed a downward trend after that.The energy distribution during the observation period showed that the dominant period of LE was relatively longer,and the energy closure ratio was 71%.During the observation period,net radiation was the most important meteorological factor for LE,H and G,followed by soil water content and air temperature,and G was more sensitive to net radiation(path coefficient 0.93).Soil water content positively regulated LE(0.18),but negatively regulated H(-0.26).The contribution degree of saturated water vapor pressure difference to LE is significantly higher than that of H.Meanwhile,air temperature has an indirect effect on LE,but a direct effect on H.In addition to the net radiation,the soil heat flux is also affected by the significant positive effect of air temperature,with a coefficient of 1.52.The quantitative results of this study can improve our cognition and understanding of the law and internal mechanism of energy exchange in desert steppe under the background of photovoltaic facility construction.

关 键 词：温性荒漠 涡度相关技术 光伏建设 水热通量 能量平衡 

分 类 号：U467.17[机械工程—车辆工程]