<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
  <gcmd:gcmd>
    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>23.7</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-04-15T10:53:30.610Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/6a745a5e-829c-43f5-8d5a-6fb549e7b81b</gcmd:viewer>
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  <skos:Concept rdf:about="6a745a5e-829c-43f5-8d5a-6fb549e7b81b">
    <skos:broader rdf:resource="9e5ec924-2fd3-4cbb-a7eb-ffde114d0cb9"/>
    <skos:prefLabel xml:lang="en">AMMONIA</skos:prefLabel>
    <skos:changeNote>Date=2026-02-18 User Id=system System Note=Added narrower relation from AMMONIA [6a745a5e-829c-43f5-8d5a-6fb549e7b81b] to AMMONIA EMISSION FLUX [bf1b3390-3afb-45aa-acae-c6e2bed39d38]</skos:changeNote>
    <gcmd:reference gcmd:text="American Meterological Society. 2000. Glossary of Meteorology, Second Edition. Boston, MA: American Meteorological Society." xml:lang="en"/>
    <skos:narrower rdf:resource="bf1b3390-3afb-45aa-acae-c6e2bed39d38"/>
    <skos:definition xml:lang="en">Ammonia (NH3) is a reduced nitrogen gas and is emitted in large quantities fromanimal feedstocks, sewerage plants, etc. Ammonia is very soluble in water andis scavenged from the lower atmosphere by clouds. Ammonia is the most abundantalkaline gas in the atmosphere and plays a large role in neutralizing acidityfrom sulfuric and nitric acids via formation of the ammonium ion.</skos:definition>
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