Terrestrial carbon sinks in the Brazilian Amazon and Cerrado region predicted from MODIS satellite data and ecosystem modeling
Terrestrial carbon sinks in the Brazilian Amazon and Cerrado region predicted from MODIS satellite data and ecosystem modeling
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DOI：
10.5194/bg-6-937-2009
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发表时间：
2009-06
期刊：
影响因子：
4.9
通讯作者：
C. Potter;S. Klooster;A. Huete;V. Genovese;M. Bustamante;L. Ferreira;R. Oliveira;R. Zepp
中科院分区：
文献类型：
--
作者：
C. Potter;S. Klooster;A. Huete;V. Genovese;M. Bustamante;L. Ferreira;R. Oliveira;R. Zepp
抽象的。一个模拟模型的基础上卫星观测每月植被覆盖度的中分辨率成像光谱仪（MODIS）被用来估计每月的碳通量在巴西亚马逊和塞拉多地区的陆地生态系统在2000-2004年期间。估算了该地区近几年大气CO2的生态系统净生产通量。一致的高碳汇通量在陆地生态系统每年的基础上，发现在西部的阿克里和朗多尼亚州和北方部分的帕拉州。这些地区没有显着影响2002-2003年厄尔尼诺事件的净年度碳收益。在整个马兰豪州和亚马孙州南部，发现该地区每年从陆地生态系统向大气的碳源通量周期性很高。如所示，虽然塔网站的比较，NEP建模与每月的MODIS增强植被指数（EVI）的输入非常相似的LBA塔帕霍斯塔网站测得的季节性碳通量。模拟结果表明，使用中分辨率成像分光仪增强植被指数（EVI）数据来预测亚马逊森林和塞拉多林地的季节性CO2吸收率的能力很强。
Abstract. A simulation model based on satellite observations of monthly vegetation cover from the Moderate Resolution Imaging Spectroradiometer (MODIS) was used to estimate monthly carbon fluxes in terrestrial ecosystems of Brazilian Amazon and Cerrado regions over the period 2000–2004. Net ecosystem production (NEP) flux for atmospheric CO2 in the region for these years was estimated. Consistently high carbon sink fluxes in terrestrial ecosystems on a yearly basis were found in the western portions of the states of Acre and Rondonia and the northern portions of the state of Para. These areas were not significantly impacted by the 2002–2003 El Nino event in terms of net annual carbon gains. Areas of the region that show periodically high carbon source fluxes from terrestrial ecosystems to the atmosphere on yearly basis were found throughout the state of Maranhao and the southern portions of the state of Amazonas. As demonstrated though tower site comparisons, NEP modeled with monthly MODIS Enhanced Vegetation Index (EVI) inputs closely resembles the measured seasonal carbon fluxes at the LBA Tapajos tower site. Modeling results suggest that the capacity for use of MODIS Enhanced Vegetation Index (EVI) data to predict seasonal uptake rates of CO2 in Amazon forests and Cerrado woodlands is strong.