我国东部山地针阔混交林碳通量特征分析  

Characteristics of carbon flux in mixed coniferous and broad-leaved forests in the mountainous areas of Eastern China

作　　者：孙彦坤[1] 张胤洲 姚维杰 叶京 张峻搏 潘小乐[2] 刘兰忠 王自发[2] 程雪玲[2] SUN Yan-kun;ZHANG Yin-zhou;YAO Wei-jie;YE jing;ZHANG Jun-bo;PAN Xiao-le;LIU Lan-zhong;WANG Zi-fa;CHENG Xue-ling(College of Resources and Environment,Northeast Agricultural University,Harbin 150030,China;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Shanghuang Observatory for Ecological Environment at the Top of Atmospheric Boundary Layer,Institute of Atmospheric Physics,Chinese Academy of Sciences,Jinhua 321203,China)

机构地区：[1]东北农业大学资源与环境学院,黑龙江哈尔滨150030 [2]中国科学院大气物理研究所,大气边界层物理与大气化学国家重点实验室,北京100029 [3]中国科学院大气物理研究所,大气边界层顶生态环境上黄观测站,浙江金华321203

出　　处：《中国环境科学》2024年第6期3492-3501,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(42177092)。

摘　　要：以浙江省金华市武义县大毛尖山为研究区域,开展复杂山地森林生态系统碳汇能力的观测研究,并利用涡动相关法在2022年6月~2023年5月进行观测,经过数据质量控制和质量评价分析,得到42%的优质CO_(2)通量数据.结果表明,大毛尖山周边以针阔混交林为主,能量闭合度为0.89,能够很好的代表站点通量情况.CO_(2)通量在日尺度上均表现为U型变化,范围为-1.20~0.89mgCO_(2)/(m^(2)·s).四季碳汇能力强弱依次为,夏季、春季、秋季、冬季;各月份净生态系统碳交换量(NEE)均为负值,整体表现为碳汇.CO_(2)通量与气象因子中的空气温度呈负相关,相对湿度和平均风速正相关,夜间因呼吸作用产生的CO_(2)通量与土壤温度正相关.本研究初步解释了大毛尖山森林生态系统的碳汇特征.This study explored the carbon sink capacity of the complex mountainous forest ecosystem around the Damaojian Mountain in Wuyi County,Jinhua,Zhejiang Province.Utilizing the eddy covariance method,CO_(2)fluxes were monitored from June 2022 through May 2023.After rigorous data quality control and analysis,42%of the data were identified as high-quality CO_(2)flux measurements.The study draws the following conclusions:This area,primarily composed of mixed coniferous and broad-leaved forests with an energy closure rate of 0.89,effectively represents the flux conditions of the site.The CO_(2)flux exhibited a U-shaped daily variation,with fluctuations ranging from-1.20 to 0.89mg CO_(2)/(m^(2)·s).An analysis of the seasonal carbon sink capacity revealed the strongest absorption in summer,followed by spring,autumn,and winter,with the net ecosystem carbon exchange(NEE)demonstrating a consistent carbon sink effect month-over-month.The analysis highlighted a negative correlation between CO_(2)flux and air temperature,whereas both relative humidity and average wind speed positively influenced the CO_(2)flux.Nighttime respiration-induced CO_(2)flux also showed a positive correlation with soil temperature.Overall,we have preliminarily explained the unique carbon sink features of the Damaojian Mountain forest ecosystem.

关 键 词：CO_(2)通量 涡动相关法(EC) 净生态系统碳交换量(NEE) 森林生态系统 复杂地形 

分 类 号：X24[环境科学与工程—环境科学]