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  <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/77cbdebf-eddf-42b5-8603-e939eccd1780</gcmd:viewer>
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  <skos:Concept rdf:about="77cbdebf-eddf-42b5-8603-e939eccd1780">
    <skos:broader rdf:resource="45325a01-2522-48d3-bffa-0edf1a934d48"/>
    <skos:prefLabel xml:lang="en">LAKE LEVELS</skos:prefLabel>
    <gcmd:reference gcmd:text="Bradley, R.S. 1999. Paleoclimatology: Reconstructing Climates of the Quaternary, 2nd edition. Harcourt Academic Press (especially Chapter 7.6)." xml:lang="en"/>
    <skos:definition xml:lang="en">Lake level fluctuations can provide important evidence for paleoclimaticconditions, particulary in arid and semiarid areas. Lake levels areparticularly sensitive to changes in hydrologic balance due to climaticfluctuations. Lakes may develop and expand if there is an abundance ofprecipitation and will recede and even dry up (due to evaporation) duringprolonged droughts. Lake sediment cores are often drilled to providestratigraphic clues to past climate conditions.</skos:definition>
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