闽江河口鳝鱼滩湿地土壤热通量的变化特征  

Variation Characteristics of Soil Heat Flux in the Shanyutan Wetlands of the Min River Estuary

作　　者：朱婉漪 张林海[1,2] 杨平[1] ZHU Wanyi;ZHANG Linhai;YANG Ping(School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China;Fujian Provincial Key Laboratory for Subtropical Resources and Environment,Fujian Normal University,Fuzhou 350007,China)

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]福建师范大学福建省亚热带资源与环境重点实验室,福州350007

出　　处：《亚热带资源与环境学报》2022年第1期51-57,78,共8页Journal of Subtropical Resources and Environment

基　　金：福建省自然科学基金项目(2021J01178、2020J01136);福建省科技厅公益类科研院所专项(2017R1034-6)。

摘　　要：对2019年3月—2020年2月福建省闽江河口鳝鱼滩湿地地表土壤热通量变化特征进行研究,分析主要环境因子对土壤热通量及其变化特征的影响。结果表明:闽江河口鳝鱼滩湿地地表土壤热通量年均日变化及季节日变化呈“S”型。受潮汐水淹环境影响,闽江河口湿地土壤热通量年均日变化曲线较旱地平缓,并且夜间比白天更为缓和,年均日变化最大差值为24.39 W·m^(-2),日变化特征中,土壤热通量对净辐射的反馈存在延时。因季风和沿海气流活动,春夏季节日均振幅比秋冬季节更加剧烈,全年热通量日振幅最大差值111.08 W·m^(-2)。全年该区土壤主要表现为热源,各个季节热通量均表现为白天热汇,夜间热源,正午出现最大值。夏季热通量峰值最大,正值时间最长,冬季相反。太阳总辐射、净辐射、6 m气温及相对湿度是影响土壤热通量变化的主要因素,其中净辐射对全年日均土壤热通量影响最为强烈,且春夏季节贡献率更高。The change of surface soil heat flux of the Shanyutan Wetlands in the Min River Estuary from March 2019 to February 2020 were studied,and main environmental factors were analyzed.The results showed that the annual average daily change and seasonal daily change of surface soil heat flux in the wetlands showed an“S”curve pattern.Affected by the tidal flooding environment,the annual average daily variation curve of soil heat flux in the wetlands is gentler than that of dry lands,and gentler at night than during the day.The maximum annual average daily variation is 24.39 W·m^(-2).In the characteristic of diurnal variation,there is a delay in the feedback of soil heat flux to net radiation.Due to the monsoon and coastal air currents,the average amplitude of spring and summer festivals is more severe than that of autumn and winter,and the maximum annual heat flux difference is 111.08 W·m^(-2).Throughout the year,the soil in this area is mainly a heat source,and the soil heat flux in each season is a heat sink during the day and a heat source at night,with the maximum occurs at noon.The peak heat flux in summer is the largest,the positive value is the longest,and the winter peak is the smallest,the negative value is the longest.The total solar radiation,net radiation,6 m temperature and relative humidity are the main factors affecting the change of soil heat flux.Among them,net radiation has the strongest influence on the daily average soil heat flux throughout the year,and the contribution rate is higher in spring and summer.

关 键 词：土壤热通量 变化特征 气象因子 湿地 闽江河口 

分 类 号：S152[农业科学—土壤学]