印度人为主导的生态系统的绿化
Taejin Park1,2, Murali K Gumma3, Weile Wang1
1NASA Ames Research Center, Moffett Field, California USA.
概括
灌显著提升了印度的发展.
科学领域:
- 地球系统科学 地球系统科学
- 农业科学 农业科学
- 遥感 遥感 遥感 遥感
背景情况:
- 卫星数据显示了地球的绿化趋势,印度的农田是主要热点.
- 印度农业依赖于灌,以减轻水压和提高作物产量.
- 灌对卫星观测到的印度绿色的确切影响尚不清楚.
研究的目的:
- 利用多个数据源调查灌在印度农田绿化中的作用.
- 了解灌对卫星观测的绿色影响的时空动态.
主要方法:
- 利用卫星衍生的叶面积数据.
- 纳入基于调查的农业统计.
- 采用最先进的土地表面模型 (LSM).
主要成果:
- 卫星观测强烈地将灌与显著的绿化联系起来,特别是在干旱季节和干旱地区.
- 国家统计数据证实了灌在提高产量和增加干旱季作物的作用.
- 土地表面模型主要将绿化归因于二氧化碳施肥,土地管理的边际影响.
结论:
- 印度的农业正在转向依赖灌的干旱季作物系统.
- 土地管理实践对于观察到的绿化至关重要,尽管模型低估了这一点.
- 需要加强合作,以改善地球系统模型中的土地管理代表性.
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