Klaus Keller

EESI Associate

Klaus Keller
Ph.D., Princeton University, 2000

Contact Information:
Department of Geosciences
208 Deike Building
University Park, PA 16802
Phone: (814) 865-6718
email: kkeller@geosc.psu.edu
Dept. website: http://www.geosc.psu.edu/~kkeller/index.html

Current Research Interests:
Global carbon cycle, phytoplankton carbon metabolism, abrupt climate change, environmental economics, Oceanography, economic analysis of climate policy

Selected Publications:
Keller, K., L. I. Miltich, A. Robinson, and R.S.J. Tol: How overconfident are current projections of carbon dioxide emissions? Energy Journal, in revision, (2008).

Miltich, L.I., D. M. Ricciuto, and Klaus Keller: A probabilistic assessment of historic land use CO₂emissions based on atmospheric, oceanic, and ice-core observations, Environmental Research Letters, in revision (2008).

Budescu, D. V., R. Lempert, S. Broomell, and K. Keller: Aided and unaided decision making with imprecise probabilities, Risk Analysis, in revision (2008).

Dorin, J., B. Tuttle, and K. Keller: Detecting ENSO period changes in a proxy record spanning the last millenium. Journal of Climate, in review (2008).

Ricciuto, D. M., K. J. Davis, and K. Keller: A Bayesian synthesis inversion of carbon cycle observations: How can observations reduce uncertainties about future sinks? Global Biogeochemical Cycles, in the press, (2008).

Keller, K., McInerney, and D. F. Bradford: Carbon dioxide sequestration: How much and when?, Climatic Change, in the press, (2008).

Keller, K., and D. McInerney: The dynamics of learning about a climate threshold, Climate Dynamics, 30, 321-332, DOI 10.1007/s00382-007-0290-5 (2008).

Brennan, B., R. Matear, and K. Keller: Measuring oxygen concentrations to improve the detection capabilities of an ocean observation array, Journal of Geophysical Research - Oceans, 113, C02019, doi:10.1029/2007JC004113, (2008).

Baehr, J., D. McInerney, K. Keller, and J. Marotzke: Optimization of an observing system design for the North Atlantic meridional overturning circulation, Journal of Atmospheric and Oceanic Technology, 25, 625-634 (2008).

Schneider, S. H., S. Semenov, A. Patwardhan, I. Burton, C.H.D. Magadza, M. Oppenheimer, A.B. Pittock, A. Rahman, J.B. Smith, A. Suarez F. Yamin, J. Corfee-Morlot, A. Finkel, H.-M. Füssel, K. Keller, Dena MacMynowski, M. D. Mastrandrea, A. Todorov, R. Sukumar, J.-P. van Ypersele, J. Zillman: Assessing key vulnerabilities and the risk from climate change. Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, M.L. Parry, O.F. Canziani, J.P. Palutikof, P.J. van der Linden and C.E. Hanson, Eds., Cambridge University Press, Cambridge, UK, 779-810 (2007).

Keller, K., A. Robinson, D. F. Bradford, and M. Oppenheimer: The regrets of procrastination in climate policy, Environmental Research Letters, 2 024004 (4pp) doi:10.1088/1748-9326/2/2/024004 (2007).

Keller, K., S.-R. Kim, J. Baehr, D. F. Bradford, and M. Oppenheimer: What is the economic value of information about climate thresholds?, Chapter in: "Integrated Assessment of Human Induced Climate Change", Chief Editor: Michael Schlesinger, in the press (2007).

McInerney, D., and K. Keller: Economically optimal risk reduction strategies in the face of uncertain climate thresholds, Climatic Change, in the press, published online, http://dx.doi.org/10.1007/s10584-006-9137-z, (2007).

Keller, K., G. Yohe, and M. Schlesinger: Managing the risks of climate thresholds: Uncertainties and information needs. An editorial essay, Climatic Change, in the press, published online, http://dx.doi.org/10.1007/s10584-006-9114-6, (2007).

Baehr, J., K. Keller, and J. Marotzke: Detecting potential changes in the meridional overturning circulation at 26 ^oN in the Atlantic, Climatic Change, in the press, published online, http://dx.doi.org/10.1007/s10584-006-9153-z, (2007).

Keller, K., C. Deutsch, M. G. Hall and D. F. Bradford: Early detection of changes in the North Atlantic meridional overturning circulation: Implications for the design of ocean observation systems, Journal of Climate, 20, 145-157 (2007).

O'Neill, B. C., P. Crutzen, A. Grübler, M. Ha Duong, K. Keller, C. Kolstad, J. Koomey, A. Lange, M. Obersteiner, M. Oppenheimer, W. Pepper, W. Sanderson, M. Schlesinger, N. Treich, A. Ulph, M. Webster, and C. Wilson, Learning and Climate Change, Climate Policy, 6, 585-589, (2006).

Min, D.-H. and K. Keller: Errors in estimated temporal tracer trends due to changes in the historical observation network: A case study of oxygen trends in the Southern Ocean, Ocean and Polar Research, 27(2), 189-195 (2005).

Keller, K., M. Hall, S.-R. Kim, D. F. Bradford, and M. Oppenheimer: Avoiding dangerous anthropogenic interference with the climate system, Climatic Change, 73, 227-238 (2005).

Keller, K., B. M. Bolker, and D. F. Bradford: Uncertain climate thresholds and optimal economic growth, Journal of Environmental Economics and Management , 48, 723-741 (2004).

Moles, C. G., J. R. Banga, and K. Keller: Solving nonconvex climate control problems: Pitfalls and algorithm performances, Applied Soft Computing, 5 (1), 35-44 (2004).

Kraepiel, A. M. L., K Keller, H. B. Chin, E. G. Malcolm, and F. M. M. Morel, Sources and Variations of Mercury in Tuna, Environmental Science and Technology, 37, 5551-5558, (2003).

Gruber, N., K. Keller, and R. M. Key: What story is told by oceanic tracer concentrations?, Science, 290, 455, 2000.

Keller, K., R. D. Slater, M. Bender and R. M. Key: Possible biological or physical explanations for decadal scale trends in North Pacific nutrient concentrations and oxygen utilization, Deep-Sea-Research, II, 49, 345-362 (2002).

Bradford, D. F., and K. Keller: Global Warming Potentials: A Cost-Effectiveness Approach, Paper presented at the NBER Summer Institute Environmental Economics Workshop, Cambridge, MA, August 7-8, 2000.

Keller, K., K. Tan, F. M. M. Morel, and D. F. Bradford: Preserving the ocean circulation: Implications for climate policy, Climatic Change, 47 (1-2) 17-43 (2000). (Also NBER working paper # 7476.)

Keller, K., and F. M. M. Morel: A model of carbon isotopic fractionation and active carbon uptake in phytoplankton, Marine Ecology Progress Series, 182, 295-298 (1999).

Kraepiel, A. M. L., K. Keller and F. M. M. Morel: A model for metal adsorption on Montmorillonite, Journal of Colloid and Interface Science, 210, 43-54 (1999).

Kraepiel, A. M. L., K. Keller and F. M. M. Morel: On the acid-base chemistry of permanently charged minerals, Environmental Science and Technology, 32, 2829-2838 (1998).

Gessler, G., and K. Keller: Vergleich verschiedener Verfahren zur Vergaerung von Bioabfaellen, Abfallwirtschaftsjournal, (7) 377-383 (1995).