A study on the relationship between Atlantic sea surface temperature and Amazonian greenness
A study on the relationship between Atlantic sea surface temperature and Amazonian greenness
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DOI：
10.1016/j.ecoinf.2010.05.005
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发表时间：
2010-09-01
影响因子：
5.1
通讯作者：
Otsuki, Kyoichi
中科院分区：
文献类型：
--
作者：
Cho, Jaeil;Yeh, Pat J. -F.;Otsuki, Kyoichi
亚马逊热带雨林的生长更容易受到降雨和辐射的影响，而不是温度的影响，南美洲东北部地区的降雨量和云量受大西洋海表温度（SST）的强烈影响最近对未来气候预测的模式试验结果表明，由于热带水汽循环系统的减弱，因此，观测研究亚马逊森林绿度与大西洋海温之间的关系，是了解亚马逊热带森林对气候变化响应的基础。利用1981-2001年的卫星遥感数据，研究了大西洋海温对亚马逊河流域归一化植被指数（NDVI）时空变化的影响。在20世纪80年代和90年代期间，分别在亚马逊河流域的某些地区发现了NDVI和SST之间的强相关性。此外，从1981-2001年12月至2月（雨季）的年际变化中也发现，NDVI分别滞后于SST两个月和一年，具有较强的相关性。尽管有这些发现，但所确定的相关性背后的机制仍不清楚，需要使用观测到的降水和辐射数据进行进一步分析，以了解亚马逊雨林在全球变暖背景下的潜在变化（C）2010 Elsevier B. V.
The growth of tropical rainforest in Amazon is critically vulnerable to the change in rainfall and radiation than in temperature, and that amount of rainfall and cloudiness in the northeast region of South American is strongly affected by the Atlantic sea surface temperature (SST) Results from recent model experiments for future climate projection have indicated a reduction of Amazonian greenness by a weakening of tropical vapor circulation system related with the change in SST Therefore, the observational investigation of the relations between the Amazon greenness and Atlantic SST is fundamental to understand the response of Amazonian tropical forest to climate change. In this study, the effect of Atlantic SST on the spatial and temporal change of the Normalized Difference Vegetation Index (NDVI) in the Amazonian region is examined by using satellite remote sensing data for the period of 1981-2001. A strong correlation between NDVI and SST is found for certain regions in Amazon during the periods of 1980s and 1990s, respectively. In addition, strong correlations with NDVI lagging behind SST for two months and one year, respectively, are also identified from the interannual December-to-February (rain season) variations during 1981-2001. Despite these findings, the mechanisms behind the identified correlation remain unclear Further analyses using observed precipitation and radiation data are required to understand the potential changes of Amazonian rainforest in the context of global warming (C) 2010 Elsevier B.V. All rights reserved