Variations of δ¹⁸O in rainwater from southwestern Oregon Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/zg64tr25n

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  • We examine the relation between δ¹⁸O in rainwater collected in southwestern Oregon and climate variables including temperature, parcel trajectory, precipitation amount, and specific humidity. Local surface air temperature at the time of sample collection explains a large proportion of δ¹⁸O variability, suggesting that paleoclimatic archives that are related to rainfall δ¹⁸O should be useful for qualitative temperature reconstructions. Models of Rayleigh distillation of air masses originating in the North Pacific can broadly constrain the observed isotopic variability in southwestern Oregon. Results from a Hybrid Single‐ Particle Lagrangian Integrated Trajectory Model suggest that recent parcel pathways have little influence on the isotopic composition of precipitation collected at our site. We also find no significant relation between rainfall d18O and precipitation amount. Changes in specific humidity along the parcel tracks, however, indicate that the water vapor exchange of the air mass with the underlying ocean influenced the isotopic composition of the most enriched samples.
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  • Ersek, V., A. C. Mix, and P. U. Clark (2010), Variations of δ¹⁸O in rainwater from southwestern Oregon, J. Geophys. Res., 115, D09109, doi:10.1029/2009JD013345.
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  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2011-11-10T17:44:05Z (GMT) No. of bitstreams: 1 MixAlan.COAS.Variations of ORainwater.pdf: 737042 bytes, checksum: 25d1e75e1677d5e3b8905436a099c8d3 (MD5)
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2011-11-10T17:19:55Z No. of bitstreams: 1 MixAlan.COAS.Variations of ORainwater.pdf: 737042 bytes, checksum: 25d1e75e1677d5e3b8905436a099c8d3 (MD5)
  • description.provenance : Made available in DSpace on 2011-11-10T17:44:05Z (GMT). No. of bitstreams: 1 MixAlan.COAS.Variations of ORainwater.pdf: 737042 bytes, checksum: 25d1e75e1677d5e3b8905436a099c8d3 (MD5) Previous issue date: 2010-05-13

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