Department of Geography

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Browsing Department of Geography by Author "Porinchu, David"

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  • ItemOpen Access
    Subfossil chironomid calibration data set from the Intermountain West
    (Cambridge University Press, 2014) Baig, Jamila; Gavin, Daniel G.; Porinchu, David
    Subfossil chironomid (non-biting midges) head capsules are ubiquitous and well preserved in lake sediment. Because many of these taxa are stenothermal with respect to summer air temperature (when larvae develop), species assemblages preserved in lake sediment records may be used to reconstruct air temperature. However, such reconstructions requires a calibration data set derived from surface sediments from a network of lakes. Haskett and Porinchu (2014) developed a 91-lake database of fossil chironomids which has not yet been publically archived. As part of a study of reconstructing air temperature at Gold Lake (Oregon) over the Holocene, Baig et al. (in press) utilized this dataset. In using the dataset, site locations and elevations were corrected at some sites. These corrections were used to develop updated estimates of mean July air temperature (MJAT) at each lake using downscale-adjusted (using local lapse rates) estimates from PRISM climate grids using the ClimateWNA software (Wang et al. 2016). Haskett, D. R., and D. F. Porinchu. 2014. A quantitative midge-based reconstruction of mean July air temperature from a high-elevation site in central Colorado, USA, for MIS 6 and 5. Quaternary Research 82:580–591. Baig, J., D. G. Gavin, I. R. Walker, and D. F. Porinchu. (n.d.). Chironomid-inferred postglacial temperature reconstruction from Gold Lake, Oregon, USA. Quaternary Research in press. PRISM Climate Group., 2020. PRISM Climate Group. Oregon State University. http://www.prism.oregonstate.edu/ Wang, T., A. Hamann, D. Spittlehouse, and C. Carroll. 2016. Locally downscaled and spatially customizable climate data for historical and future periods for North America. PLOS ONE 11:e0156720.