Response of terrestrial evapotranspiration to Earth's greening
Response of terrestrial evapotranspiration to Earth's greening
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DOI：
10.1016/j.cosust.2018.03.001
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发表时间：
2018-08
影响因子：
7.2
通讯作者：
Zhenzhong Zeng;Liqing Peng;S. Piao
中科院分区：
文献类型：
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作者：
Zhenzhong Zeng;Liqing Peng;S. Piao
在诺阿高级甚高分辨率辐射计30年的卫星测量中明确观察到地球的绿化。在这里，我们回顾了最近的文献陆地蒸散量（ET）的响应地球的绿化，包括绿化的全球陆地ET变化的贡献，在过去几十年中，它在调节地球的气候系统的变化植被的作用。尽管基于观测的全球陆地蒸散量重建存在很大的不确定性，但所有产品都证实了过去30年陆地蒸散量显著增加（P< 0.05）。1982-2011年期间所有重建的集合提供了一个相对可靠的估计，即每十年每年0.97 ± 0.16万亿吨，或陆地区域平均每十年每年7.65 ± 1.26毫米。基于观测的统计分析和观测驱动的模型模拟表明，全球陆地ET加剧的50%以上是由地球绿化引起的。地球系统模型模拟进一步表明，这种反应是地球绿化与地球水和气候系统之间复杂反馈回路的关键决定因素。这些结果强调了需要更准确地表示植被动态和地球系统模型中的植被变化的ET的敏感性，这将最终改善水资源管理和气候变化缓解通过生态系统管理的战略。
The greening of the Earth has been unequivocally observed in 30 years of satellite measurements from NOAA-AVHRR. Here, we review the recent literature on the response of terrestrial evapotranspiration (ET) to Earth's greening, including the contribution of greening to the global terrestrial ET change over recent decades and its role in the regulation by vegetation of changes in Earth's climate system. Although large uncertainties remain in the observation-based reconstructions of global terrestrial ET, all products established a significant increase in terrestrial ET over the past three decades (P< 0.05). The ensemble of all reconstructions over the period 1982–2011 provided a relatively robust estimate of 0.97 ± 0.16 trillion tonnes per year per decade, or 7.65 ± 1.26 mm per year per decade averaged over the terrestrial area. More than 50% of this global intensification of terrestrial ET was caused by the greening of the Earth, as evidenced by observation-based statistical analysis and observation-driven model simulations. Earth system model simulations further showed that this response is a key determinant of the complex feedback loops of Earth's greening with Earth's water and climate systems. These results highlight the need for much more accurate representation of vegetation dynamics and the sensitivity of ET to vegetation changes in Earth system models, which will ultimately improve the strategies developed for water resource management and climate change mitigation via ecosystem management.