In-situ measurements of the stable isotopic composition of atmospheric water vapour using FTIR spectroscopy

Simple item page
dc.contributor.authorParkes, SDen_AU
dc.contributor.authorGriffith, DWTen_AU
dc.contributor.authorWilliams, AGen_AU
dc.contributor.authorElement, Aen_AU
dc.contributor.authorChambers, SDen_AU
dc.contributor.authorMcCabe, MFen_AU
dc.date.accessioned2010-08-20T04:25:07Zen_AU
dc.date.available2010-08-20T04:25:07Zen_AU
dc.date.issued2010-04-27en_AU
dc.date.statistics2010-04-27en_AU
dc.description.abstractThe stable isotopic composition of atmospheric water vapour is related to the hydrological processes that occur along the back trajectory of an air mass, including evaporation at the moisture source, atmospheric mixing and precipitation. Thus, by collecting continuous measurements of the stable isotopes in water vapour a record of the hydrological history of air passing a site can be compiled. To collect such a record a FTIR instrument capable of making real‐time in‐situ measurements of the stable isotopes in water vapour has been developed. The instrument has been deployed at a site near Sydney, Australia for approximately 18 months. During this time we have shown that the FTIR instrument compares well with laser based analysers that are capable of making similar real‐time measurements. In addition to the comparison between the different analysers, we have been investigating some of the large signals that are observed in the time series of isotopic measurements. The analysis of the dataset indicates that the lowest isotope values are generally associated with cold fronts that pass over the South East of the Australian Continent and then over the Sydney region. When a cold front passes over or near the measurement site, the deuterium isotope value can be observed to change by up to 100 per mille within the space of a few hours. In addition, cold frontal passages with contrasting moisture source and precipitation histories exhibit systematic differences in water vapour stable isotope signals as they pass over Sydney. On the other hand, higher and more slowly changing isotope values are generally associated with anticyclonic conditions. The study shows that for our site the variations in the stable isotope values are strongly influenced by the hydrological history of air parcels at a synoptic scale.en_AU
dc.description.sponsorshipCOST action ES0604; Institut Pierre-Simon Laplaceen_AU
dc.identifier.citationParkes, S., Griffith, D., Williams, A. G., Element, A., Chambers, S., & McCabe, M. (2010). In-situ measurements of the stable isotopes composition of atmospheric water vapour using FTIR spectroscopy. Presentation to the workshop on the Water Isotopologues in the Atmosphere, 27th – 30th April 2010. Paris, France: University Pierre et Marie Curie.en_AU
dc.identifier.conferenceenddate30 April 2010en_AU
dc.identifier.conferencenameWorkshop on the Water Isotopologues in the Atmosphereen_AU
dc.identifier.conferenceplaceParis, Franceen_AU
dc.identifier.conferencestartdate27 April 2010en_AU
dc.identifier.govdoc2422en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2263en_AU
dc.language.isoenen_AU
dc.publisherUniversité Pierre et Marie Curieen_AU
dc.subjectWater vaporen_AU
dc.subjectStable isotopesen_AU
dc.subjectAtmosphericsen_AU
dc.subjectFourier transform spectrometersen_AU
dc.subjectPrecipitationen_AU
dc.subjectMoistureen_AU
dc.titleIn-situ measurements of the stable isotopic composition of atmospheric water vapour using FTIR spectroscopyen_AU
dc.typeConference Presentationen_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
PARKES_In_Situ_Measurements_Stable_Isotopic_Composition_2010_4_27.pdf
Size:
139.31 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications