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Spatial performance of four climate field reconstruction methods targeting the Common Era

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Smerdon, J. E. and Kaplan, A. and Zorita, E. and González Rouco, J. Fidel and Evans, M. N. (2011) Spatial performance of four climate field reconstruction methods targeting the Common Era. Geophysical research letters, 38 . ISSN 0094-8276

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Official URL: http://dx.doi.org/10.1029/2011GL047372




Abstract

The spatial skill of four climate field reconstruction (CFR) methods is investigated using pseudoproxy experiments (PPEs) based on two millennial-length general circulation model simulations. Results indicate that presently available global and hemispheric CFRs for the Common Era likely suffer from spatial uncertainties not previously characterized. No individual method produced CFRs with universally superior spatial error statistics, making it difficult to advocate for one method over another. Northern Hemisphere means are shown to be insufficient for evaluating spatial skill, indicating that the spatial performance of future CFRs should be rigorously tested for dependence on proxy type and location, target data and employed methodologies. Observed model-dependent methodological performance also indicates that CFR methods must be tested across multiple models and conclusions from PPEs should be carefully evaluated against the spatial statistics of real-world climatic fields. Citation: Smerdon, J. E., A. Kaplan, E. Zorita, J. F. Gonzalez-Rouco, and M. N. Evans (2011), Spatial performance of four climate field reconstruction methods targeting the Common Era, Geophys. Res. Lett., 38, L11705, doi: 10.1029/2011GL047372.


Item Type:Article
Additional Information:

Copyright 2011 by the American Geophysical Union. Supported in part by NSF grants ATM0902436 and ATM0902715, by NASA grant NNX09AF44G, by NOAA grants NA07OAR4310060 and NA10OAR4320137, and by the European Project Millennium. Supplementary materials can be accessed at http://www.ldeo.columbia.edu/similar to jsmerdon/2011_grl_supplement.html. LDEO contribution 7471.

Uncontrolled Keywords:Proxy-based reconstructions; Past climate; Model
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:36219
Deposited On:08 Mar 2016 15:47
Last Modified:10 Dec 2018 15:05

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