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[1]郭舒艳 任小丽** 盖艾鸿** 张 黎 李 攀 葛 蓉.基于FLUXNET的CLM模型生态系统呼吸模拟验证*[J].应用与环境生物学报,2019,25(04):1-23.[doi:10.19675/j.cnki.1006-687x.2018.11008]
 GUO Shu-yan,REN Xiao-li*,GAI Ai-hong*,et al.Benchmarking the ecosystem respiration simulated by CLM based on FLUXNET*[J].Chinese Journal of Applied & Environmental Biology,2019,25(04):1-23.[doi:10.19675/j.cnki.1006-687x.2018.11008]
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基于FLUXNET的CLM模型生态系统呼吸模拟验证*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年04期
页码:
1-23
栏目:
研究论文
出版日期:
2019-07-30

文章信息/Info

Title:
Benchmarking the ecosystem respiration simulated by CLM based on FLUXNET*
文章编号:
201811008
作者:
郭舒艳12 任小丽2** 盖艾鸿1** 张 黎23 李 攀45 葛 蓉25
1.甘肃农业大学 资源与环境学院,兰州 730070 2.中国科学院地理科学与资源研究所 生态系统网络观测与模拟重点实验室,北京 100101 3.中国科学院大学 资源与环境学院,北京 100 1904.中国科学院地球化学研究所,贵阳 550002 5.中国科学院大学,北京 100190 ;6.南京信息工程大学 应用气象学院,南京 210024
Author(s):
GUO Shu-yan12 REN Xiao-li2* GAI Ai-hong1* ZHANG Li23 LI Pan45 GE Rong25 LI Rui26 HE Hong-lin23
1College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China2Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China3College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China4State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China5University of Chinese Academy of Sciences, Beijing 100190, China6College of Applied Meteorology, University of Information Science and Technology, Nanjing 210044, China
关键词:
生态系统呼吸CLMFLUXNET模拟效果
Keywords:
Ecosystem respiration CLM FLUXNET s imulated performance
DOI:
10.19675/j.cnki.1006-687x.2018.11008
摘要:
准确估算陆地生态系统呼吸(Ecosystem respiration, RE)(Ecosystem respiration, RE)对全球陆地生态系统碳收支研究具有重要意义。模型模拟是估算陆地RE变化的一种常用手段。然而,目前陆地生态系统过程模型的RE模拟尚未得到充分验证。本研究基于耦合模式比较计划第五阶段(Coupled Model Intercomparison Project Phase 5, CMIP5)的通用陆面模型(Community land model, CLM)RE模拟结果和全球通量网(FLUXNET)66个站点的涡度相关通量观测数据(277条站点年数据)评估CLM模型对RE的模拟效果。研究结果表明:(1)在空间尺度上,CLM低估了高纬度站点RE,高估了低纬度站点RE,但高纬度低估量更大导致空间格局整体低估(相对误差为-3.56%)。(2)在时间尺度上,CLM模型基本捕捉了RE的年际和季节变化,相关系数分别为0.60(P<0.001)和0.63(P<0.001);CLM低估年尺度和月尺度的RE,绝对误差分别是-182.21 g C m-2 yr-1、-120.16 g C m-2 mon-1,相对误差分别是-17.84%、-10.60%。(3)CLM模型对不同植被功能型的RE模拟效果不同,由优及差依次为混交林、常绿针叶林、草地、农田、落叶阔叶林、常绿阔叶林。本研究在时空尺度上量化了CLM模型的生态系统呼吸模拟误差并分析了土壤呼吸Q_10和MR_base参数以及土壤碳库模拟等因素的影响,可为CLM模型的生态系统呼吸模块参数优化提供依据,进而提升其模拟精度。
Abstract:
Accurate estimation of terrestrial ecosystem respiration (RE) is of great significance to the study of global terrestrial ecosystem carbon budget. Model simulation is a common method to simulate terrestrial RE changes. However, the RE simulation of the current terrestrial ecosystem process models have not been fully verified yet . In this study, we evaluated the RE simulated by Community Land Model (CLM) using eddy covariance flux observations of 66 stations from the FLUXNET ( 277 site-years). The results showed that: (1) CLM underestimated RE at high latitude sites while overestimated it at low latitude stations, and the magnitude of the former was larger than that of the latter, thus leading to the overall underestimation of RE (the relative error was -3.56%). (2) At the temporal scale, CLM roughly captured the interannual and seasonal variation of RE, and the correlation coefficient were 0.60 ( P<0.001) and 0.63(P<0.001), respectively. CLM underestimated the annual and monthly RE, with the absolute error of -182.21 g C m-2 yr -1 and -120.16 g C m-2 mon -1, respectively, and the relative error was-17.84% and -10.60%, respectively. (3) The simulation results of different plant functional types from the best to worst were ranked as: mixed forest, evergreen coniferous forest , grassland , farmland , deciduous broad leaved forest, and evergreen broadleaved forest. This study quantified the error of CLM-RE simulation at the spatial-temporal scale and analyzed its influence factors such as soil respiration Q10 , MRbase parameters and soil carbon reservoir simulation. The results can help optimizing CLM-RE and improving the accuracy of RE simulations.? ? ? ? ? ? ? ? ? ? ? ??

相似文献/References:

[1]朱二雄,詹伟,胡骥,等.不同放牧强度对高寒草甸生态系统呼吸的早期影响[J].应用与环境生物学报,2016,22(22卷04):561.[doi:10.3724/SP.J.1145.2015.11059]
 ZHU Erxiong,ZHAN Wei,et al.Early influence of the grazing intensity on ecosystem respiration of alpine meadows[J].Chinese Journal of Applied & Environmental Biology,2016,22(04):561.[doi:10.3724/SP.J.1145.2015.11059]

备注/Memo

备注/Memo:
收稿日期:2018-11-06 接受日期 Accepted: 2018-12-14*国家重点基础研究发展计划(973计划)项目(2015CB954102)、国家自然科学基金项目(31700417)、国家重点研发计划项目( 2016YFC0500204)、科技基础性工作专项( 2015FY110700 ) 资助 **通讯作者(E-mail: gaiah@gsau.edu.cn; renxl@igsnrr.ac.cn)点击摘要页题目后的“PDF”可下载阅读全文;本文为已录用的作者修定稿,尚未经编辑全面修改。引用本文请注明出处本刊;发表刊期和页码将以正式出版时的安排为准,但DOI确定不变。
更新日期/Last Update: 2018-12-28