Deuterium excess in subtropical free troposphere water vapor: Continuous measurements from the Chajnantor Plateau, northern Chile
Water vapor measured continuously by cavity ring‐down spectroscopy from July 2012 to March 2013 on the hyperarid Chajnantor Plateau, northern Chile (elevation = 5080 m, pressure ≈ 550 hPa), has a mean deuterium excess (d‐excess = δD − 8*δ18O) of 46‰ ± 5‰ and frequently exceeds 100‰ at low water vapo...
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| Veröffentlicht in: | Geophysical research letters 2014-12, Vol.41 (23), p.8652-8659 |
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| creator | Samuels-Crow, Kimberly E. Galewsky, Joseph Sharp, Zachary D. Dennis, Kate J. |
| description | Water vapor measured continuously by cavity ring‐down spectroscopy from July 2012 to March 2013 on the hyperarid Chajnantor Plateau, northern Chile (elevation = 5080 m, pressure ≈ 550 hPa), has a mean deuterium excess (d‐excess = δD − 8*δ18O) of 46‰ ± 5‰ and frequently exceeds 100‰ at low water vapor mixing ratios (q ≤ 500 ppmv). These measurements provide empirical support for theoretical predictions of free troposphere d‐excess. The d‐excess measured at this site can be understood in terms of supersaturation with respect to ice at relative humidities between 100% and 130%, followed by mixing with moist midtropospheric or lower tropospheric air en route to the plateau. The d‐excess measured at Chajnantor is consistent with predictions for d‐excess in the upper troposphere from isotope‐enabled general circulation models and with high vapor saturation over ice in cloud‐resolving and microphysical models.
Key Points
Measured d‐excess is controlled by in‐cloud processes and mixingRayleigh fractionation at RH = 105 to 130% largely controls observed d‐excessWater vapor undergoes mixing en route to Chajnantor |
| doi_str_mv | 10.1002/2014GL062302 |
| format | Article |
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Key Points
Measured d‐excess is controlled by in‐cloud processes and mixingRayleigh fractionation at RH = 105 to 130% largely controls observed d‐excessWater vapor undergoes mixing en route to Chajnantor</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2014GL062302</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Analytical methods ; Atacama desert ; atmospheric water vapor ; Cavity ringdown ; Chajnantor Plateau ; Circulation ; Continuous fibers ; Deuterium ; deuterium excess ; Fractionation ; General circulation ; General circulation models ; Holes ; Ice ; Isotopes ; Mathematical models ; Mixing ratio ; Plateaus ; Relative humidity ; Saturation ; Spectroscopic analysis ; Spectroscopy ; subtropical humidity ; Supersaturation ; Troposphere ; Upper troposphere ; Water vapor ; Water vapour</subject><ispartof>Geophysical research letters, 2014-12, Vol.41 (23), p.8652-8659</ispartof><rights>2014. American Geophysical Union. All Rights Reserved.</rights><rights>2015. American Geophysical Union. All Rights Reserved.</rights><rights>Copyright Blackwell Publishing Ltd. Dec 2014</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c6120-c1240336f02e3019cd3509ab95797fdb4811a5011936603d763d12d9d6d34da43</citedby><cites>FETCH-LOGICAL-c6120-c1240336f02e3019cd3509ab95797fdb4811a5011936603d763d12d9d6d34da43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2014GL062302$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2014GL062302$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,1427,11493,27901,27902,45550,45551,46384,46443,46808,46867</link.rule.ids></links><search><creatorcontrib>Samuels-Crow, Kimberly E.</creatorcontrib><creatorcontrib>Galewsky, Joseph</creatorcontrib><creatorcontrib>Sharp, Zachary D.</creatorcontrib><creatorcontrib>Dennis, Kate J.</creatorcontrib><title>Deuterium excess in subtropical free troposphere water vapor: Continuous measurements from the Chajnantor Plateau, northern Chile</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>Water vapor measured continuously by cavity ring‐down spectroscopy from July 2012 to March 2013 on the hyperarid Chajnantor Plateau, northern Chile (elevation = 5080 m, pressure ≈ 550 hPa), has a mean deuterium excess (d‐excess = δD − 8*δ18O) of 46‰ ± 5‰ and frequently exceeds 100‰ at low water vapor mixing ratios (q ≤ 500 ppmv). These measurements provide empirical support for theoretical predictions of free troposphere d‐excess. The d‐excess measured at this site can be understood in terms of supersaturation with respect to ice at relative humidities between 100% and 130%, followed by mixing with moist midtropospheric or lower tropospheric air en route to the plateau. The d‐excess measured at Chajnantor is consistent with predictions for d‐excess in the upper troposphere from isotope‐enabled general circulation models and with high vapor saturation over ice in cloud‐resolving and microphysical models.
Key Points
Measured d‐excess is controlled by in‐cloud processes and mixingRayleigh fractionation at RH = 105 to 130% largely controls observed d‐excessWater vapor undergoes mixing en route to Chajnantor</description><subject>Analytical methods</subject><subject>Atacama desert</subject><subject>atmospheric water vapor</subject><subject>Cavity ringdown</subject><subject>Chajnantor Plateau</subject><subject>Circulation</subject><subject>Continuous fibers</subject><subject>Deuterium</subject><subject>deuterium excess</subject><subject>Fractionation</subject><subject>General circulation</subject><subject>General circulation models</subject><subject>Holes</subject><subject>Ice</subject><subject>Isotopes</subject><subject>Mathematical models</subject><subject>Mixing ratio</subject><subject>Plateaus</subject><subject>Relative humidity</subject><subject>Saturation</subject><subject>Spectroscopic analysis</subject><subject>Spectroscopy</subject><subject>subtropical humidity</subject><subject>Supersaturation</subject><subject>Troposphere</subject><subject>Upper troposphere</subject><subject>Water vapor</subject><subject>Water vapour</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkU1v1DAQhiMEEkvhxg-wxIVDA2M7tmNuaGnTSgEqVD5uljeZaLMkdrAT2h77z_GyCKFKIE62Nc8zeseTZU8pvKAA7CUDWlQ1SMaB3ctWVBdFXgKo-9kKQKc7U_Jh9ijGHQBw4HSV3b7BZcbQLyPB6wZjJL0jcdnMwU99YwfSBUSyf_k4bTEgubKJJ9_t5MMrsvZu7t3il0hGtHEJOKKbY7L8SOYtkvXW7px1sw_kYkimXY6J8yGVgkvFfsDH2YPODhGf_DqPso-nJ5frs7x-X52vX9d5IymDvKGsAM5lBww5UN20XIC2Gy2UVl27KUpKrQBKNZcSeKskbylrdStbXrS24EfZ80PfKfhvC8bZjH1scBisw5Tf0KSBEqXU_4EKoVipy33XZ3fQnV-CS4MYqinTSrCfDf9OyUJxVabQiTo-UE3wMQbszBT60YYbQ8HsF2z-XHDC2QG_Sr9480_WVB9qwbiGJOUHqY8zXv-WbPhqZMohzOd3lbn89Pbii6grA_wHVme01w</recordid><startdate>20141216</startdate><enddate>20141216</enddate><creator>Samuels-Crow, Kimberly E.</creator><creator>Galewsky, Joseph</creator><creator>Sharp, Zachary D.</creator><creator>Dennis, Kate J.</creator><general>Blackwell Publishing Ltd</general><general>John Wiley & Sons, Inc</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>7UA</scope><scope>C1K</scope></search><sort><creationdate>20141216</creationdate><title>Deuterium excess in subtropical free troposphere water vapor: Continuous measurements from the Chajnantor Plateau, northern Chile</title><author>Samuels-Crow, Kimberly E. ; Galewsky, Joseph ; Sharp, Zachary D. ; Dennis, Kate J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c6120-c1240336f02e3019cd3509ab95797fdb4811a5011936603d763d12d9d6d34da43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Analytical methods</topic><topic>Atacama desert</topic><topic>atmospheric water vapor</topic><topic>Cavity ringdown</topic><topic>Chajnantor Plateau</topic><topic>Circulation</topic><topic>Continuous fibers</topic><topic>Deuterium</topic><topic>deuterium excess</topic><topic>Fractionation</topic><topic>General circulation</topic><topic>General circulation models</topic><topic>Holes</topic><topic>Ice</topic><topic>Isotopes</topic><topic>Mathematical models</topic><topic>Mixing ratio</topic><topic>Plateaus</topic><topic>Relative humidity</topic><topic>Saturation</topic><topic>Spectroscopic analysis</topic><topic>Spectroscopy</topic><topic>subtropical humidity</topic><topic>Supersaturation</topic><topic>Troposphere</topic><topic>Upper troposphere</topic><topic>Water vapor</topic><topic>Water vapour</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Samuels-Crow, Kimberly E.</creatorcontrib><creatorcontrib>Galewsky, Joseph</creatorcontrib><creatorcontrib>Sharp, Zachary D.</creatorcontrib><creatorcontrib>Dennis, Kate J.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Samuels-Crow, Kimberly E.</au><au>Galewsky, Joseph</au><au>Sharp, Zachary D.</au><au>Dennis, Kate J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Deuterium excess in subtropical free troposphere water vapor: Continuous measurements from the Chajnantor Plateau, northern Chile</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>2014-12-16</date><risdate>2014</risdate><volume>41</volume><issue>23</issue><spage>8652</spage><epage>8659</epage><pages>8652-8659</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>Water vapor measured continuously by cavity ring‐down spectroscopy from July 2012 to March 2013 on the hyperarid Chajnantor Plateau, northern Chile (elevation = 5080 m, pressure ≈ 550 hPa), has a mean deuterium excess (d‐excess = δD − 8*δ18O) of 46‰ ± 5‰ and frequently exceeds 100‰ at low water vapor mixing ratios (q ≤ 500 ppmv). These measurements provide empirical support for theoretical predictions of free troposphere d‐excess. The d‐excess measured at this site can be understood in terms of supersaturation with respect to ice at relative humidities between 100% and 130%, followed by mixing with moist midtropospheric or lower tropospheric air en route to the plateau. The d‐excess measured at Chajnantor is consistent with predictions for d‐excess in the upper troposphere from isotope‐enabled general circulation models and with high vapor saturation over ice in cloud‐resolving and microphysical models.
Key Points
Measured d‐excess is controlled by in‐cloud processes and mixingRayleigh fractionation at RH = 105 to 130% largely controls observed d‐excessWater vapor undergoes mixing en route to Chajnantor</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/2014GL062302</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley-Blackwell AGU Digital Library; Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content; EZB-FREE-00999 freely available EZB journals |
| subjects | Analytical methods Atacama desert atmospheric water vapor Cavity ringdown Chajnantor Plateau Circulation Continuous fibers Deuterium deuterium excess Fractionation General circulation General circulation models Holes Ice Isotopes Mathematical models Mixing ratio Plateaus Relative humidity Saturation Spectroscopic analysis Spectroscopy subtropical humidity Supersaturation Troposphere Upper troposphere Water vapor Water vapour |
| title | Deuterium excess in subtropical free troposphere water vapor: Continuous measurements from the Chajnantor Plateau, northern Chile |
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