{"id":{"repo_id":"unm","oai_identifier":"oai:digitalrepository.unm.edu:eps_etds-1091"},"canonical_url":"https://search.dev.ndltd.org/etd/unm/oai:digitalrepository.unm.edu:eps_etds-1091","repository":{"repo_id":"unm","name":"University of New Mexico","base_url":"https://digitalrepository.unm.edu/do/oai/"},"display":{"title":"DIURNAL VARIATION OF WATER VAPOR ISOTOPOLOGUES ON THE CHAJNANTOR PLATEAU DURING THE AUSTRAL SPRING","abstract":"The diurnal variation of water vapor isotopologues over the Chajnantor Plateau during the Austral Spring was investigated using a near continuous record of in situ water vapor isotopologues, numerical modeling, and routine meteorological measurements. On average, there is an approximately 34% increase in the mixing ratio coupled with an 11‰ increase in δ18O, 71‰ increase in δD, and 23‰ decrease in deuterium excess on the Plateau. This significant diurnal variation is a result of the mixing between dry, upper tropospheric air (dry end-member) and a small contribution (9-25%) of a continental (δD < -120‰) source of moisture (wet end-member). While the dry end-member continuously subsides on the Plateau, the continental source is advected onto the Plateau during the day due to a thermally induced, regional, diurnal circulation.","abstract_html":"The diurnal variation of water vapor isotopologues over the Chajnantor Plateau during the Austral Spring was investigated using a near continuous record of in situ water vapor isotopologues, numerical modeling, and routine meteorological measurements. On average, there is an approximately 34% increase in the mixing ratio coupled with an 11‰ increase in δ18O, 71‰ increase in δD, and 23‰ decrease in deuterium excess on the Plateau. This significant diurnal variation is a result of the mixing between dry, upper tropospheric air (dry end-member) and a small contribution (9-25%) of a continental (δD &lt; -120‰) source of moisture (wet end-member). While the dry end-member continuously subsides on the Plateau, the continental source is advected onto the Plateau during the day due to a thermally induced, regional, diurnal circulation.","abstract_has_math":false,"creators":["Tunner, Alec"],"institution":null,"degree_name":"Earth and Planetary Sciences","degree_level":"Masters","degree_discipline":"Department of Earth and Planetary Sciences","degree_department":null,"school":null,"contributors":["Galewsky, Joseph","Gutzler, David","Fawcett, Peter"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-12-01T08:00:00Z","date_published":"2015-12-01T08:00:00Z","updated_at":"2026-07-24T05:26:22Z","subjects":["Diurnal variation","Water vapor isotopologues"],"languages":["English"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://digitalrepository.unm.edu/eps_etds/92"],"render_values":[{"text":"https://digitalrepository.unm.edu/eps_etds/92","href":"https://digitalrepository.unm.edu/eps_etds/92","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/1928/31760","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Galewsky, Joseph","Gutzler, David","Fawcett, Peter"]},{"key":"dc:creator","label":"Author","values":["Tunner, Alec"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Department of Earth and Planetary Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters","Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Earth and Planetary Sciences"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Diurnal variation","Water vapor isotopologues"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/1928/31760","https://digitalrepository.unm.edu/eps_etds/92"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The diurnal variation of water vapor isotopologues over the Chajnantor Plateau during the Austral Spring was investigated using a near continuous record of in situ water vapor isotopologues, numerical modeling, and routine meteorological measurements. On average, there is an approximately 34% increase in the mixing ratio coupled with an 11‰ increase in δ18O, 71‰ increase in δD, and 23‰ decrease in deuterium excess on the Plateau. This significant diurnal variation is a result of the mixing between dry, upper tropospheric air (dry end-member) and a small contribution (9-25%) of a continental (δD < -120‰) source of moisture (wet end-member). While the dry end-member continuously subsides on the Plateau, the continental source is advected onto the Plateau during the day due to a thermally induced, regional, diurnal circulation."]},{"key":"dc:title","label":"Title","values":["DIURNAL VARIATION OF WATER VAPOR ISOTOPOLOGUES ON THE CHAJNANTOR PLATEAU DURING THE AUSTRAL SPRING"]}]}],"canonical_facts":{"dc:contributor":["Galewsky, Joseph","Gutzler, David","Fawcett, Peter"],"dc:creator":["Tunner, Alec"],"dc:description.abstract":["The diurnal variation of water vapor isotopologues over the Chajnantor Plateau during the Austral Spring was investigated using a near continuous record of in situ water vapor isotopologues, numerical modeling, and routine meteorological measurements. On average, there is an approximately 34% increase in the mixing ratio coupled with an 11‰ increase in δ18O, 71‰ increase in δD, and 23‰ decrease in deuterium excess on the Plateau. This significant diurnal variation is a result of the mixing between dry, upper tropospheric air (dry end-member) and a small contribution (9-25%) of a continental (δD < -120‰) source of moisture (wet end-member). While the dry end-member continuously subsides on the Plateau, the continental source is advected onto the Plateau during the day due to a thermally induced, regional, diurnal circulation."],"dc:identifier":["http://hdl.handle.net/1928/31760","https://digitalrepository.unm.edu/eps_etds/92"],"dc:language":["English"],"dc:subject":["Diurnal variation","Water vapor isotopologues"],"dc:title":["DIURNAL VARIATION OF WATER VAPOR ISOTOPOLOGUES ON THE CHAJNANTOR PLATEAU DURING THE AUSTRAL SPRING"],"thesis:degree_discipline":["Department of Earth and Planetary Sciences"],"thesis:degree_level":["Masters","Thesis"],"thesis:degree_name":["Earth and Planetary Sciences"]},"updated_at":"2026-07-24T05:26:22Z"}