Attributing regional trends of evapotranspiration and gross primary productivity with remote sensing: a case study in the North China Plain

Attributing regional trends of evapotranspiration and gross primary productivity with remote sensing: a case study in the North China Plain
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利用遥感归因蒸散量和总初级生产力的区域趋势:以华北平原为例

DOI:
10.5194/hess-21-295-2017
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发表时间:
2016-09
影响因子:
6.3
通讯作者:
Jun Xia
Jun Xia
中科院分区:
地球科学2区
文献类型:
--
作者:
Xingguo Mo;Xuejuan Chen;Shi Hu;Suxia Liu;Jun Xia

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蒸散量(ET)和总初级生产力的变化 (GPP)对于农业生态系统的影响和适应评估至关重要 对气候变化的影响。VIP模式的模拟表明,每年的ET和 从1981年到2013年,中国平原北部的GPP略有增加。这个 春季ET和GPP均呈上升趋势,而 在夏季是疲软和下降的。一个完整的因素分析 说明了气候变化、二氧化碳的相对贡献 受精、管理对ET(Gpp)的趋势为56(−32) %, −分别为28(25) %和68(108) %。全球经济的衰退 由恶化的气溶胶和空气污染引起的辐射是 夏季GPP下降的主要原因,而空气变暖加剧了 水分循环,提高了春季的植物生产力。 一般而言,农艺改良是作物生长的主要驱动力。 提高生产力。
Attributing changes in evapotranspiration (ET) and gross primary productivity (GPP) is crucial for impact and adaptation assessment of the agro-ecosystems to climate change. Simulations with the VIP model revealed that annual ET and GPP slightly increased from 1981 to 2013 over the North China Plain. The tendencies of both ET and GPP were upward in the spring season, while they were weak and downward in the summer season. A complete factor analysis illustrated that the relative contributions of climatic change, CO2 fertilization, and management to the ET (GPP) trend were 56 (−32) %, −28 (25) %, and 68 (108) %, respectively. The decline of global radiation resulted from deteriorated aerosol and air pollution was the principal cause of GPP decline in summer, while air warming intensified the water cycle and advanced the plant productivity in the spring season. Generally, agronomic improvements were the principal drivers of crop productivity enhancement.
华北平原区域农作物产量、耗水量和利用效率及其对气候变化的响应
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