时间序列修订对森林二氧化碳通量的影响

应用生态学报 ›› 2004, Vol. ›› Issue (10): 1833-1836.

时间序列修订对森林二氧化碳通量的影响

吴家兵^1,2, 关德新¹, 赵晓松¹, 韩士杰¹, 金昌杰¹

1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
2. 中国科学院研究生院, 北京 100093

收稿日期:2004-03-15 修回日期:2004-04-27 出版日期:2004-10-15
通讯作者: 关德新
基金资助:
国家自然科学基金项目(30370293);中国科学院知识创新工程重大项目(KZCX1SW0101A);中国科学院沈阳应用生态研究所领域前沿资助项目

Impact of time series correction on forest CO₂ flux

WU Jiabing^1,2, GUAN Dexin¹, ZHAO Xiaosong¹, HAN Shijie¹, JIN Changjie¹

1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100093, China

Received:2004-03-15 Revised:2004-04-27 Online:2004-10-15

摘要/Abstract

摘要： 对长白山阔叶红松林2003年生长季的涡动相关实测时间序列进行了去倾修订与超声风速仪倾斜修订,并分析了不同修订方法对森林CO₂通量计算值的影响.结果表明,基于未修订时间序列计算得到的森林CO₂通量(Fcraw)被高估.线性与非线性去倾对Fcraw的修订量分别为1.6%、1.8%,两者差异很小.平面拟合坐标变换与流线坐标变换对Fcraw的修订量分别为3.7%、4.7%,两者差异较大.对线性去倾后的时间序列分别进行流线坐标变换与平面拟合坐标变换,二者对Fcraw的修订量分别为5.5%与4.6%.建议对时间序列进行线性去倾与平面拟合坐标变换综合修订.

关键词: 时间序列, 碳循环, 去倾修订, 超声风速仪倾斜修订

Abstract: Detrending correction and sonic anemometer tilt correction were made to modify the raw time series measured from eddy covariance system in broad-leaved Korean pine forest of Changbai Mountains during the growing season of 2003,and the impact of different correction methods on CO₂ flux was analyzed quantificationally.The results showed that the forest CO₂ flux during growing season was overestimated when calculated from raw time series.The ratio of correction to origin flux (Fcraw) was 1.6% and 1.8% for linear and nonlinear detrend,respectively,which suggested that there was little difference between these two detrending methods.It was 3.7% and 4.7% for the planar fit coordinate transforming (PF) correction and the streamline coordinate system transforming (ST) correction,respectively,suggesting that there was a clear difference between these two sonic anemometer tilt correction methods.When detrended time series used,it was 5.5 % and 4.6% for ST correction and PF correction,respectively.It was recommended that raw time series should be corrected synthetically with linear detrend method and PF method.

Key words: Time series, Carbon cycle, Detrending correction, Sonic anemometer tilt correction

中图分类号:

S716

吴家兵, 关德新, 赵晓松, 韩士杰, 金昌杰. 时间序列修订对森林二氧化碳通量的影响[J]. 应用生态学报, 2004, (10): 1833-1836.

WU Jiabing, GUAN Dexin, ZHAO Xiaosong, HAN Shijie, JIN Changjie. Impact of time series correction on forest CO₂ flux[J]. Chinese Journal of Applied Ecology, 2004, (10): 1833-1836.

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