Evaluating aerosol direct radiative effects on global terrestrial ecosystem carbon dynamics from 2003 to 2010
Evaluating aerosol direct radiative effects on global terrestrial ecosystem carbon dynamics from 2003 to 2010
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DOI：
10.3402/tellusb.v66.21808
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发表时间：
2014-01-01
影响因子：
2.3
通讯作者：
Zhuang, Qianlai
中科院分区：
文献类型：
--
作者：
Chen, Min;Zhuang, Qianlai
建立了一个完整的陆地生态系统模式和一个大气辐射传输模块，并应用于2003-2010年气溶胶直接辐射对全球陆地生态系统碳动力学的影响。中分辨率成像分光辐射计对关键大气参数的测量被用来量化气溶胶对向下太阳辐射的影响。模拟和不考虑气溶胶负载表明，气溶胶通过影响植物物候，热和水文条件以及太阳辐射影响陆地生态系统的碳动态。模拟结果还表明，气溶胶使陆地总初级生产力增加4.9 Pg C yr（-1），净初级生产力增加3.8 Pg C yr（-1），生态系统净生产力增加3.9 Pg C yr（-1），植物呼吸增加1.1 Pg C yr（-1）。0.1 Pg C yr（-1）量级的气溶胶负荷降低了生态系统的异养呼吸。这些结果支持以前的研究结果的积极影响气溶胶光散射对植物生产，但建议有一个强大的空间变化，由于云层覆盖。这项研究表明，通过气溶胶-云相互作用的直接和间接气溶胶辐射效应应被考虑到量化的全球碳循环。
An integrated terrestrial ecosystem model and an atmospheric radiative transfer module are developed and applied to evaluate aerosol direct radiative effects on carbon dynamics of global terrestrial ecosystems during 2003-2010. The Moderate-Resolution Imaging Spectroradiometer measurements of key atmosphere parameters have been used to quantify aerosol effects on downward solar radiation. Simulations with and without considering the aerosol loadings show that aerosol affects terrestrial ecosystem carbon dynamics through the effects on plant phenology, thermal and hydrological conditions as well as solar radiation. The simulations also show that aerosol enhances the terrestrial gross primary production by 4.9 Pg C yr(-1), the net primary production by 3.8 Pg C yr(-1), the net ecosystem production by 3.9 Pg C yr(-1), and the plant respiration by 1.1 Pg C yr(-1) during the period. The aerosol loading at a magnitude of 0.1 Pg C yr(-1) reduces ecosystem heterotrophic respiration. These results support previous findings of the positive effects of aerosol light scattering on plant production, but suggest there is a strong spatial variation due to cloud cover. This study suggests that both direct and indirect aerosol radiative effects through aerosol-cloud interactions should be considered to quantify the global carbon cycle.