View : 167 Download: 0

Applications of cryogenic method to water vapor sampling from ambient air for isotopes analysis

Title
Applications of cryogenic method to water vapor sampling from ambient air for isotopes analysis
Authors
Kim S.Han Y.Hur S.-D.Lee J.
Ewha Authors
이정훈
SCOPUS Author ID
이정훈scopus
Issue Date
2016
Journal Title
Ocean and Polar Research
ISSN
1598-141XJCR Link
Citation
vol. 38, no. 4, pp. 339 - 345
Keywords
Cross-validationCryogenic sampling deviceSerial connectionWater stable isotope
Publisher
Korea Ocean Research and Development Institute
Indexed
SCOPUS; KCI scopus
Abstract
Stable water vapor isotopes have been utilized as a tracer for studying atmospheric global circulations, climate change and paleoclimate with ice cores. Recently, since laser spectroscopy has been available, water vapor isotopes can be measured more precisely and continuously. Studies of water vapor isotopes have been conducted over the world, but it is the early stage in south Korea. For vapor isotopes study, a cryogenic sampling device for water vapor isotopes has been developed. The cryogenic sampling device consists of the dewar bottle, filled with extremely low temperature material and impinger connected with a vacuum pump. Impinger stays put in the dewar bottle to change the water vapor which passes through the inside of impinger into the solid phase as ice. The fact that water vapor has not sampled completely leads to isotopic fractionation in the impinger. To minimize the isotopic fractionation during sampling water vapor, we have tested the method using a serial connection with two sets of impinger device in the laboratory. We trapped 98.02% of water vapor in the first trap and the isotopic difference of the trapped water vapor between two impinger were about 20‰ and 6‰ for hydrogen and oxygen, respectively. Considering the amount of water vapor trapped in each impinger, the isotopic differences for hydrogen and oxygen were 0.33‰ and 0.06‰, respectively, which is significantly smaller than the precision of isotopic measurements. This work can conclude that there is no significant fractionation during water vapor trapping. © 2016, Korea Ocean Research and Development Institute. All rights reserved.
DOI
10.4217/OPR.2016.38.4.339
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE