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Science 28 September 2007:
Vol. 317. no. 5846, p. 1866
DOI: 10.1126/science.1143286
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Technical Comments

Comment on "A Semi-Empirical Approach to Projecting Future Sea-Level Rise"

Torben Schmith,1* Søren Johansen,2 Peter Thejll3

Rahmstorf (Reports, 19 January 2007, p. 368) used the observed relation between rates of change of global surface temperature and sea level to predict future sea-level rise. We revisit the application of the statistical methods used and show that estimation of the regression coefficient is not robust. Methods commonly used within econometrics may be more appropriate for the problem of projected sea-level rise.

1 Centre for Ocean and Ice, Danish Meteorological Institute, Copenhagen, Denmark.
2 Institute of Mathematical Sciences, University of Copenhagen, Copenhagen, Denmark.
3 Danish Climate Centre, Danish Meteorological Institute, Copenhagen, Denmark.

* To whom correspondence should be addressed. E-mail: ts{at}dmi.dk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)