Improved Estimates of Ammonia Emissions from Global Croplands

文献类型： 外文期刊

第一作者： Zhan, Xiaoying

作者： Zhan, Xiaoying;Adalibieke, Wulahati;Cui, Xiaoqing;Wang, Qihui;Huang, Weichen;Zhou, Feng;Zhan, Xiaoying;Adalibieke, Wulahati;Cui, Xiaoqing;Wang, Qihui;Huang, Weichen;Zhou, Feng;Zhan, Xiaoying;Winiwarter, Wilfried;Winiwarter, Wilfried;Reis, Stefan;Reis, Stefan;Zhang, Lin;Bai, Zhaohai

作者机构：

关键词： ammonia emission; croplands; global; abatement

期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：9.028； 五年影响因子：9.922 ）

ISSN： 0013-936X

年卷期： 2021 年 55 卷 2 期

页码：

收录情况： SCI

摘要： Reducing ammonia (NH3) volatilization from croplands while satisfying the food demand is strategically required to mitigate haze pollution. However, the global pattern of NH3 volatilization remains uncertain, primarily because of the episodic nature of NH3 volatilization rates and the high variation of fertilization practices. Here, we improve a global estimate of crop-specific NH3 emissions at a high spatial resolution using an updated data-driven model with a survey-based dataset of the fertilization scheme. Our estimate of the globally averaged volatilization rate (12.6% +/- 2.1%) is in line with previous datadriven studies (13.7 +/- 3.1%) but results in one-quarter lower emissions than process-based models (16.5 +/- 3.1%). The associated global emissions are estimated at 14.4 +/- 2.3 Tg N, with more than 50% of the total stemming from three stable crops or 12.2% of global harvested areas. Nearly three-quarters of global cropland-NH3 emissions could be reduced by improving fertilization schemes (right rate, right type, and right placement). A small proportion (20%) of global harvested areas, primarily located in China, India, and Pakistan, accounts for 64% of abatement potentials. Our findings provide a critical reference guide for the future abatement strategy design when considering locations and crop types.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序