摘要
为了解近湖面大气温室气体(GHGs:CO_(2)、CH_(4)和N_(2)O)浓度的时空变化特征及影响因素,分别于2017年2月、4月、8月和11月采集巢湖15个样点的近湖面大气和表层水体,测定大气GHGs浓度和水样的理化参数。结果显示:①观测期间巢湖近湖面大气GHGs浓度均已超过2017年全球本底平均浓度,应引起有关部门的足够重视。②近湖面大气GHGs浓度时空变化特征表现为:时间上,整个湖区冬季大气GHGs浓度显著高于其它季节;空间上,大气GHGs浓度在不同湖区的差异不显著,这可能是受到风向和湖泊周边土地利用类型的共同影响所致。③通过相关性分析发现近湖面大气GHGs浓度时空分布格局与所测水体相关指标并不存在强相关性,说明湖泊GHGs内源生产对近湖面大气GHGs的贡献很小;结合区域风向数据分析发现陆源(城市、农田)GHGs的大气输送是影响巢湖近湖面大气GHGs时空分布格局的主要因素。
To explore the temporal and spatial variation characteristics and influencing factors of the concentrations of atmospheric greenhouse gases(GHGs:CO_(2),CH_(4),N_(2)O)near the lake surface,air and surface water sam-ples from 15 stations of Chaohu Lake in February,April,August and November 2017 were collected,and then GHGs concentrations and related physical and chemical parameters were analyzed.The results showed:1)During the observation period,the atmospheric GHGs concentration near the lake surface of Chaohu Lake has exceeded the global background average value in 2017,which should be paid enough attention to by related departments.2)The certain temporal and spatial variation of atmospheric GHGs concentration near the lake surface has been ob-served.In time,the atmospheric GHGs concentration in winter in the whole lake area was significantly higher than that in other seasons.Spatially,no significant difference in atmospheric GHGs concentration among different lake regions has been observed,which might be affected by the wind direction and the land use types around the lake.3)Correlation analysis results showed that no robust relative parameters controlled the temporal and spatial pattern of atmospheric GHGs concentration near the lake surface,indicating that the endogenous production of lake GHGs had little contribution to atmospheric GHGs near the lake surface.Combined with the analysis of re-gional wind direction data,it was found that the atmospheric transport of terrestrial(urban and farmland)GHGs was the main factor affecting the temporal and spatial distribution pattern of atmospheric GHGs concentrations near the lake surface of Chaohu Lake.
作者
苗雨青
洪炜林
孙奕琳
孙方虎
孟赫男
罗浩
MIAO Yu-qing;HONG Wei-lin;SUN Yi-lin;SUN Fang-hu;MENG He-nan;LUO Hao(Anhui Provincial Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin,School of Geography and Tourism,Anhui Normal University,Wuhu 241002,China;Institute of Geographical Sciences,Hebei Academy of Sciences,Shijiazhuang 050000,China;Hebei Technology Innovation Center for Geographic Information Application,Shijiazhuang 050000,China)
出处
《安徽师范大学学报（自然科学版）》
2024年第3期246-254,共9页
Journal of Anhui Normal University(Natural Science)
基金
安徽省自然科学基金项目(2108085MD126)
国家自然科学基金项目(41601083,41601103).
关键词
巢湖
大气温室气体
时空变异
风向
Chaohu Lake
atmospheric greenhouse gas
spatio-temporal variation
wind direction
