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Anatomy of Summertime Upslope Events in Northeastern Colorado: Ammonia (NH3) Transport to the Rocky Mountains
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2024-09-11 , DOI: 10.1021/acs.est.3c10902 Julieta F Juncosa Calahorrano 1 , Amy P Sullivan 1 , Ilana B Pollack 1 , Joseph R Roscioli 2 , Megan E McCabe 3 , Kathryn M Steinmann 3 , Dana R Caulton 3 , En Li 1 , Jeffrey R Pierce 1 , Lillian E Naimie 1 , Da Pan 1 , Jeffrey L Collett 1 , Emily V Fischer 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2024-09-11 , DOI: 10.1021/acs.est.3c10902 Julieta F Juncosa Calahorrano 1 , Amy P Sullivan 1 , Ilana B Pollack 1 , Joseph R Roscioli 2 , Megan E McCabe 3 , Kathryn M Steinmann 3 , Dana R Caulton 3 , En Li 1 , Jeffrey R Pierce 1 , Lillian E Naimie 1 , Da Pan 1 , Jeffrey L Collett 1 , Emily V Fischer 1
Affiliation
The Transport and Transformation of Ammonia (TRANS2Am) airborne field campaign occurred over northeastern Colorado during the summers of 2021 and 2022. A subset of the TRANS2Am flights investigated easterly wind conditions capable of moving agricultural emissions of ammonia (NH3) through urban areas and into the Rocky Mountains. TRANS2Am captured 6 of these events, unveiling important commonalities. (1) NH3 enhancements are present over the mountains on summer afternoons when easterly winds are present in the foothills region. (2) The abundance of gas-phase NH3 is 1 and 2 orders of magnitude higher than particle-phase NH4+ over the mountains and major agricultural sources, respectively. (3) During thermally driven circulation periods, emissions from animal husbandry sources closer to the mountains likely contribute more to the NH3 observed over the mountains than sources located further east. (4) Transport of plumes from major animal husbandry sources in northeastern Colorado westward across the foothills requires ∼5 h. (5) Winds drive variability in the transport of NH3 into nearby mountain ecosystems, producing both direct plume transport and recirculation. A similar campaign in other seasons, including spring and autumn, when synoptic scale events can produce sustained upslope transport, would place these results in context.
中文翻译:
科罗拉多州东北部夏季上坡事件剖析:氨 (NH3) 输送到落基山脉
氨的运输和转化 (TRANS 2 Am) 机载现场活动于 2021 年和 2022 年夏季在科罗拉多州东北部进行。TRANS 2 Am 飞行的一个子集调查了能够将农业排放的氨 (NH 3 ) 转移通过的东风条件。城市地区和落基山脉。 TRANS 2 Am 捕捉到了其中 6 个事件,揭示了重要的共性。 (1) 夏季下午,当山麓地区有东风时,山区上空会出现NH 3增强。 (2)山区和主要农业源区气相NH 3丰度分别比颗粒相NH 4 +高1个和2个数量级。 (3) 在热驱动环流期间,靠近山区的畜牧业排放源的排放可能比位于更东部的排放源对山区观测到的 NH 3贡献更大。 (4) 羽流从科罗拉多州东北部的主要畜牧业来源向西穿过山麓输送需要约 5 小时。 (5) 风驱动 NH 3向附近山区生态系统输送的变化,产生直接羽流输送和再循环。其他季节(包括春季和秋季)的类似活动,天气尺度事件可以产生持续的上坡运输,可以将这些结果放在背景中。
更新日期:2024-09-11
中文翻译:
科罗拉多州东北部夏季上坡事件剖析:氨 (NH3) 输送到落基山脉
氨的运输和转化 (TRANS 2 Am) 机载现场活动于 2021 年和 2022 年夏季在科罗拉多州东北部进行。TRANS 2 Am 飞行的一个子集调查了能够将农业排放的氨 (NH 3 ) 转移通过的东风条件。城市地区和落基山脉。 TRANS 2 Am 捕捉到了其中 6 个事件,揭示了重要的共性。 (1) 夏季下午,当山麓地区有东风时,山区上空会出现NH 3增强。 (2)山区和主要农业源区气相NH 3丰度分别比颗粒相NH 4 +高1个和2个数量级。 (3) 在热驱动环流期间,靠近山区的畜牧业排放源的排放可能比位于更东部的排放源对山区观测到的 NH 3贡献更大。 (4) 羽流从科罗拉多州东北部的主要畜牧业来源向西穿过山麓输送需要约 5 小时。 (5) 风驱动 NH 3向附近山区生态系统输送的变化,产生直接羽流输送和再循环。其他季节(包括春季和秋季)的类似活动,天气尺度事件可以产生持续的上坡运输,可以将这些结果放在背景中。