Publication Abstracts

Field et al. 2010

Field, R.D., G.W.K. Moore, G. Holdsworth, and G.A. Schmidt, 2010: A GCM-based analysis of circulation controls on δ18O in the southwest Yukon, Canada: Implications for climate reconstructions in the region. Geophys. Res. Lett., 37, L05706, doi:10.1029/2009GL041408.

To improve our understanding of paleoclimatic records in the southwest Yukon, we examined controls on precipitation δ18O using an isotopically-equipped atmospheric general circulation model (GCM). Our results show that, particularly during the cool-season, elevated δ18O is associated with a deeper Aleutian Low and stronger southerly moisture flow, while lower δ18O is associated with the opposite meteorological conditions. These results suggest that the large mid-19th century shift towards lower δ18O values seen in paleoclimate records from the region was associated with a shift towards a weaker Aleutian Low. While in disagreement with a previous interpretation of this shift, it is consistent with records of glacial advance and tree-ring growth during the same period, and observational studies of Aleutian Low controls on temperature and precipitation in the region.

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BibTeX Citation

@article{fi04100j,
  author={Field, R. D. and Moore, G. W. K. and Holdsworth, G. and Schmidt, G. A.},
  title={A GCM-based analysis of circulation controls on δ18O in the southwest Yukon, Canada: Implications for climate reconstructions in the region},
  year={2010},
  journal={Geophys. Res. Lett.},
  volume={37},
  pages={L05706},
  doi={10.1029/2009GL041408},
}

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RIS Citation

TY  - JOUR
ID  - fi04100j
AU  - Field, R. D.
AU  - Moore, G. W. K.
AU  - Holdsworth, G.
AU  - Schmidt, G. A.
PY  - 2010
TI  - A GCM-based analysis of circulation controls on δ18O in the southwest Yukon, Canada: Implications for climate reconstructions in the region
JA  - Geophys. Res. Lett.
VL  - 37
SP  - L05706
DO  - 10.1029/2009GL041408
ER  -

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