Grassland ecosystems play an essential role in climate regulation through carbon (C) storage in plant and soil. But, anthropogenic practices such as livestock grazing, grazing related excreta nitrogen (N) deposition, and manure/fertilizer N application have the potential to reduce the effectiveness of grassland C sink through increased nitrous oxide (N 2 O) and methane (CH 4 ) emissions. Although the effect of anthropogenic activities on net greenhouse gas (GHG) fluxes in grassland ecosystems have been investigated at local to regional scales, estimates of net GHG balance at the global scale remains uncertain. With the data-model framework integrating empirical estimates of livestock CH 4 emissions with process-based modeling estimates of land CO 2 , N 2 O and CH 4 fluxes, we examined the overall global warming potential (GWP) of grassland ecosystems during 1961–2010. We then quantified the grassland-specific and regional v...

中文翻译：

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全球牧场和牧场的温室气体平衡

草原生态系统通过植物和土壤中的碳（C）储存在气候调节中起着至关重要的作用。但是，诸如放牧，放牧相关粪便氮（N）的沉积和施肥/肥料氮等人为做法可能会通过增加一氧化二氮（N 2 O）和甲烷（CH 4）来降低草地碳汇的有效性。排放。尽管已在地方到区域范围内调查了人为活动对草地生态系统中净温室气体通量的影响，但全球范围内温室气体净平衡的估计仍不确定。通过数据模型框架，将牲畜CH 4排放的经验估计与基于过程的土地CO 2，N 2 O和CH 4通量的模型估计结合在一起，我们研究了1961-2010年期间草地生态系统的总体全球变暖潜能（GWP）。然后，我们量化了特定于草原和区域的植被。