Chemical regimes of atmospheric secondary inorganic aerosol formation and nitrogen deposition in rural areas of the USA shifted from ammonia-sensitive to ammonia-insensitive between 2011 and 2020, according to analyses of long-term observations. These regime shifts led to a reduction in ammonium in aerosols and increased ammonia deposition near emission hotspots.

中文翻译：

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美国农村地区气雾化铵减少，排放热点附近氨沉积增加


根据长期观测分析，2011年至2020年间，美国农村地区大气次生无机气溶胶形成和氮沉降的化学状况从对氨敏感转变为对氨不敏感。这些状况的转变导致气溶胶中的铵减少，并增加了排放热点附近的氨沉积。