Biome-BGC模型模拟阔叶红松林碳水通量的参数敏感性检验和不确定性分析

李旭华,孙建新

Testing parameter sensitivities and uncertainty analysis of Biome-BGC model in simulating carbon and water fluxes in broadleaved-Korean pine forests

LI Xu-Hua,SUN Osbert Jianxin

表1 红松(PK)和阔叶树(DB)生理生态参数本地化

Table 1 Parameterization for Korean pine (PK) and broadleaved species (DB) ecophysiological parameters

参数 Parameter 符号 Symbol 红松基 准值 Basic value of Korean pine 阔叶树 基准值 Basic value of broadleaf species 单位 Unit 来源 Source 转移生长占生长季的比例 Transfer growth period Tt 0.3 0.2 - Biome-BGC V4.2 凋落过程占生长季的比例 Litterfall period LFG 0.3 0.2 - Biome-BGC V4.2 叶片与细根周转率 Annual leaf and fine root turnover fraction LFRT 0.32 1.0 a-1 Liu et al., 2014 活立木周转率 Annual live wood turnover fraction LWT 0.7 0.7 a-1 Biome-BGC V4.2 整株植物死亡率 Annual whole-plant mortality fraction WPM 0.009 0 0.021 3 a-1 Sang & Li, 1998 火灾死亡率 Annual fire mortality fraction FM 0 0 a-1 Set by us 细根与叶片碳分配比 New fine root C: leaf C FRC:LC 1.2 0.9 - Yao et al., 1986; Mei, 2006 新茎与新叶碳分配比 New stem C: leaf C SC:LC 1.4 2.4 - Li, 1984 活立木与所有木质组织碳分配比 New live wood C: total wood C LWC:TWC 0.379 0.1 - Wu et al., 2017 粗根与新茎碳分配比 New coarse root C: stem C CRC:SC 0.29 0.23 - White et al., 2000 当前生长比例 Current growth proportion CGP 0.5 0.5 - Biome-BGC V4.2 叶片碳氮比 C:N of leaves C:Nleaf 34.30 17.55 kg·kg-1 Measured by us 叶片凋落物碳氮比 C:N of falling leaf litter C:Nlitter 96.5 41.1 kg·kg-1 Li et al., 2008; Mao et al., 2016; Li et al., 2017 细根碳氮比 C:N of ?ne roots C:Nfr 56.4 47.4 kg·kg-1 Liang et al., 2018 活立木碳氮比 C:N of live wood C:Nlw 97.4 97.05 kg·kg-1 Wu et al., 2017 死立木碳氮比 C:N of dead wood C:Ndw 398 212 kg·kg-1 Zhang & Wang, 2010 叶片凋落物易分解物质所占比 Leaf litter labile proportion Llab 0.45 0.53 - Jiang, 2013 叶片凋落物纤维素所占比 Leaf litter cellulose proportion Lcel 0.25 0.22 - Jiang, 2013 叶片凋落物木质素所占比 Leaf litter lignin proportion Llig 0.30 0.25 - Jiang, 2013 细根中易分解物质所占比 Fine root labile proportion FRlab 0.34 0.30 - Biome-BGC V4.2 细根中纤维素所占比 Fine root cellulose proportion FRcel 0.44 0.45 - Biome-BGC V4.2 细根中木质素所占比 Fine root lignin proportion FRlig 0.22 0.25 - Biome-BGC V4.2 死立木中纤维素所占比 Dead wood cellulose proportion DWcel 0.73 0.76 - Zhu, 2013 死立木中木质素所占比 Dead wood lignin proportion DWlig 0.27 0.24 - Zhu, 2013 冠层截留系数 Water interception coef?cient Wint 0.045 0.033 LAI-1·d-1 Wu et al., 2017 冠层消光系数 Light extinction coef?cient k 0.50 0.58 - Zhou et al., 2008 所有叶面积与投影叶面积之比 Ratio of all sided to projected leaf area LAIall:proj 2.6 2.0 - White et al., 2000 冠层平均比叶面积 Average speci?c leaf area SLA 16.4 54.2 m2·kg-1 Measured by us 阴叶与阳叶比叶面积比 Ratio of shade SLA : sunlit SLA SLAshd:sun 2 2 - White et al., 2000 Rubisco酶中叶氮含量 Fraction of leaf N in Rubisco FLNR 0.080 0.075 - Su et al., 2015 最大气孔导度 Maximum stomatal conductance Gsmax 0.006 0 0.006 5 m·s-1 Su et al., 2015 表皮导度 Cuticular conductance Gcut 0.000 06 0.000 01 m·s-1 Su et al., 2015 边界层导度 Boundary layer conductance Gbl 0.09 0.01 m·s-1 White et al., 2000 气孔开始减小时叶片水势 Leaf water potential : start of gs reduction LWPi -0.65 -0.34 MPa White et al., 2000 气孔停止减小时叶片水势 Leaf water potential : completion of gs reduction LWPf -2.5 -2.2 MPa White et al., 2000 气孔开始减小时饱和水汽压差 Vapor pressure deficit : start of gs reduction VPDi 610 1 100 Pa White et al., 2000 气孔停止减小时饱和水汽压差 Vapor pressure deficit : completion of gs reduction VPDf 3 100 3 600 Pa White et al., 2000