摘要
为了探明兴安落叶松林生长季净生态系统CO 2交换量对区域气候因子的响应及其在未来气候情景下的动态变化特征,为今后兴安落叶松林碳交换研究提供参考数据。利用参数化后的Biome-BGC模型模拟并验证大兴安岭兴安落叶松林2013年生长季碳交换情况,通过Pearson相关分析研究生长季日平均NEE值与气候因子的关系,基于试验区气候变化趋势设置未来气候情景,预测NEE值在RCPs排放情景下的变化情况。结果显示:兴安落叶松林模拟NEE值与实测NEE值之间呈极显著相关关系(R=0.705,P<0.01),且两者在时间序列上波动较为一致;2013年生长季模拟日平均NEE值为-1.91 gCO_(2)/(m^(2)·d);(2)试验区生长季NEE值与温度呈极显著负相关关系(R=-0.9,P<0.01),与降水之间不存在明显相关关系;在RCP2.6排放情景中,兴安落叶松林日平均NEE值低于初始数据,在RCP8.5排放情景中,日平均NEE值高于初始数据。
To analyze the response of net ecosystem exchange(NEE)of Larix gmelinii forest in growing season to regional climate factors and its dynamic change characteristics under future climate scenarios,and provide reference for future research on carbon exchange of L.gmelinii forest,the parameterized Biome-BGC model was used to simulate and verify the carbon exchange of L.gmelinii forest in 2013 growing season.The relationship between daily mean NEE and climate factors in growing season was studied by Pearson correlation analysis.Based on the climate change trend of the experimental area,the future climate scenario was set up to predict the change of NEE under RCPs emission scenario.There was a significant correlation between the simulated NEE and the measured NEE(R=0.705,P<0.01),and the fluctuation of the two was consistent in the time series.In 2013,the daily average NEE was-1.91 gCO_(2)/(m^(2)·d).NEE was negatively correlated with temperature(R=-0.9,P<0.01),but not with precipitation.In RCP2.6 emission scenario,the daily average NEE of L.gmelinii forest was lower than the initial data,while in RCP8.5 emission scenario,the daily average NEE was higher than the initial data.
作者
张扬
张秋良
李小梅
代海燕
王飞
ZHANG Yang;ZHANG Qiu-liang;LI Xiao-mei;DAI Hai-yan;WANG Fei(Forestry College,Inner Mongolia Agricultural University,Hohhot Inner Mongolia 010010,P.R.China;Institute of Forest Resource Information Techniques,Chinese Academy of Forestry,Beijing 100091,P.R.China;Inner Mongolia Ecological and Agricultural Meteorological Center,Hohhot Inner Mongolia 010051,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2021年第5期73-80,89,共9页
Journal of West China Forestry Science
基金
国家自然科学基金项目(32060262)。
