Remote Sensing Evaluation of CLM4 GPP for the Period 2000–09*
Remote Sensing Evaluation of CLM4 GPP for the Period 2000–09*
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DOI：
10.1175/jcli-d-11-00401.1
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发表时间：
2012-08
影响因子：
4.9
通讯作者：
J. Mao;P. Thornton;Xiaoying Shi;Maosheng Zhao;W. Post
中科院分区：
文献类型：
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作者：
J. Mao;P. Thornton;Xiaoying Shi;Maosheng Zhao;W. Post
摘要遥感技术可以为生态系统模型评估提供长期、大规模的产品。作者比较了共同体陆地模式第四版(CLM4)在半度分辨率下模拟的月总初级生产力(GPP)与中分辨率成像光谱仪(MODIS)GPP产品(MOD17)对2000年1月至2009年12月10年期间GPP的卫星估计。评估依据是长期平均碳同化、季节平均分布、年周期的幅度和相位、年内和年际GPP变率及其对气候变量的响应。对于长期的年度和季节性平均水平，两种产品都清楚地展示了主要的GPP模式。与MODIS产品相比，CLM4高估了热带常绿森林的GPP。在大多数植物功能类型(PFTs)中，CLM4具有比MODIS更长的碳吸收周期，GPP在春季出现的时间较早，而在中国的GPP下降较晚。
AbstractRemote sensing can provide long-term and large-scale products helpful for ecosystem model evaluation. The authors compare monthly gross primary production (GPP) simulated by the Community Land Model, version 4 (CLM4) at a half-degree resolution with satellite estimates of GPP from the Moderate Resolution Imaging Spectroradiometer (MODIS) GPP product (MOD17) for the 10-yr period January 2000–December 2009. The assessment is presented in terms of long-term mean carbon assimilation, seasonal mean distributions, amplitude and phase of the annual cycle, and intraannual and interannual GPP variability and their responses to climate variables. For the long-term annual and seasonal means, major GPP patterns are clearly demonstrated by both products. Compared to the MODIS product, CLM4 overestimates the magnitude of GPP for tropical evergreen forests. CLM4 has a longer carbon uptake period than MODIS for most plant functional types (PFTs) with an earlier onset of GPP in spring and a later decline of GPP in...