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Science Keywords > EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AMMONIUM AEROSOLS

Preferred term

AMMONIUM AEROSOLS  

Definition

  • Atmospheric ammonia (NH3) is an important component of the global nitrogen cycle [Galloway and Cowling, 2002; Galloway et al., 2008; Sutton et al., 2007, 2008; Erisman et al., 2008, 2013; Fowler et al., 2013, 2015]. In the troposphere ammonia reacts rapidly with acids such as sulfuric (H2SO4), nitric (HNO3) to form fine particulate matter (PM2.5) [Malm et al., 2004]. These ammonium (NH4+) containing aerosols affect Earth's radiative balance, both directly by scattering incoming radiation [Adams et al., 2001; Martin et al., 2004; Henze et al., 2012] and indirectly as cloud condensation nuclei [Abbatt et al., 2006]. PM2.5 endangers public health by penetrating the human respiratory systems, depositing in the lungs and alveolar regions [Pope et al., 2002], and causing premature mortality [Lelieveld et al., 2015]. A precursor of these inorganic aerosols, gaseous NH3 is often the limiting species in their formation [Wang et al., 2013; Lelieveld et al., 2015]. Excess reactive nitrogen reduces biodiversity and causes harmful algal blooms and anoxic conditions. Dry deposition of gaseous ammonia may have substantially greater adverse impacts on ecosystem health than deposition of ammonium in aerosols or precipitation [Sheppard et al., 2011]. In contrast, PM2.5 has greater impact on human morbidity and mortality. In this article we quantify recent (~14 year) increases in tropospheric ammonia and suggest likely causes for these trends. (en)

Broader concept

Change note

  • 2023-01-31 16:48:04.0 [sritz] Insert Concept add broader relation (AMMONIUM AEROSOLS [48e0400c-727e-4794-b80c-efdf9f71e3ba,1202695] - AEROSOLS [2e5a401b-1507-4f57-82b8-36557c13b154,1199353]);
  • 2023-02-07 14:15:34.0 [sritz] insert Definition (id: null text: Atmospheric ammonia (NH3) is an important component of the global nitrogen cycle [Galloway and Cowling, 2002; Galloway et al., 2008; Sutton et al., 2007, 2008; Erisman et al., 2008, 2013; Fowler et al., 2013, 2015]. In the troposphere ammonia reacts rapidly with acids such as sulfuric (H2SO4), nitric (HNO3) to form fine particulate matter (PM2.5) [Malm et al., 2004]. These ammonium (NH4+) containing aerosols affect Earth's radiative balance, both directly by scattering incoming radiation [Adams et al., 2001; Martin et al., 2004; Henze et al., 2012] and indirectly as cloud condensation nuclei [Abbatt et al., 2006]. PM2.5 endangers public health by penetrating the human respiratory systems, depositing in the lungs and alveolar regions [Pope et al., 2002], and causing premature mortality [Lelieveld et al., 2015]. A precursor of these inorganic aerosols, gaseous NH3 is often the limiting species in their formation [Wang et al., 2013; Lelieveld et al., 2015]. Excess reactive nitrogen reduces biodiversity and causes harmful algal blooms and anoxic conditions. Dry deposition of gaseous ammonia may have substantially greater adverse impacts on ecosystem health than deposition of ammonium in aerosols or precipitation [Sheppard et al., 2011]. In contrast, PM2.5 has greater impact on human morbidity and mortality. In this article we quantify recent (~14 year) increases in tropospheric ammonia and suggest likely causes for these trends. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/48e0400c-727e-4794-b80c-efdf9f71e3ba

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