Oregon State University

People

Andreas Schmittner

Andreas Schmittner photo
Associate Professor

Discipline: Physics of Oceans and Atmospheres
Secondary Discipline: Ocean Ecology and Biogeochemistry
Office: Burt 256
Phone: 541-737-9952
Fax: 541-737-2064
Email: aschmittner@coas.oregonstate.edu
Website
Vita or Résumé

Specialty

Climate Modeling

Research Interests

Climate Change, Ocean Biogeochemical Cycles, Interactions in the Climate System, Paleoclimate, Ocean Circulation

Current Research

Reconstructing Glacial Nitrogen and Carbon Cycling Using Isotopes

Estimating Climate Sensitivity From Temperature Reconstructions of the Last Glacial Maximum

Assessing Climate Model Simulations of Last Glacial Maximum Ocean Circulation with Carbon Isotopes

Quantifying the Effect of the Lunar Nodal Tide on North Pacific Climate Variability

Modeling Effects of Greenland Ice Sheet Melting on Atlantic Meridional Overturning Circulation Variability and Predictability

Education

Ph.D., Physics, University of Bern, Switzerland, 1999

Diploma, Physics, University Bremen, Germany, 1996

Courses

ATS320 Man's Impact on Climate W14, S12, S11

OC599/OC669 Introduction to Climate Modeling S13, W11, W09, W07

OC331 Introduction to Oceanography W10, F07

Graduate Students

Juan Muglia

Christopher J. Somes, M.S. 2009

Publications


For pdf's click here.

2014

Schmittner, A., and Egbert, G. D. (2014) An improved parameterization of tidal mixing for ocean models, Geoscientific Model Development, 7, 211-224, doi:10.5194/gmd-7-211-2014. html, model code, dissipation data and scripts available here

2013

Schmittner, A., Gruber, N., Mix, A. C., Key, R. M., Tagliabue, A., and Westberry, T. K.  (2013) Biology and air-sea gas exchange controls on the distribution of carbon isotope ratios (d13C) in the ocean, Biogeosciences, 10, 5793-5816, doi:10.5194/bgd-10-5793-2013. html data: observations at CDIAC, model code & obs at BG

Somes, C. J., Oschlies, A., and Schmittner, A. (2013) Isotopic constraints on the pre-industrial oceanic nitrogen budget, Biogeosciences, 10, 5889-5910, doi:10.5194/bgd-10-5889-2013. html

Galbraith, E. D., Kienast, M., Albuquerque, A. L., Altabet, M., Batista, F., Bianchi, D., Calvert, S. E., Contreras Quintana, S., Crosta, X., De Pol Holz, R., Dubois, N., Etourneau, J., Francois, R., Hsu, T.-C., Ivanochko, T., Jaccard, S. L., Kao, S.-J., Kiefer, T., Kienast, S., Lehmann, M. F., Martinez, P., McCarthy, M., Meckler, A. N., Mix, A. C., Mobius, J., Pedersen, T. F., Quan, T. M., Robinson, R. S., Ryabenko, E., Schmittner, A., Schneider, R., Schneider-Mor, A., Shigemitsu, M., Sinclair, D., Somes, C., Studer, A. S., Tesdal, J.-E., Thunell, R., and Yang, J.-Y. T. (2012) The acceleration of oceanic denitrification during deglacial warming, Nature Geosc., 6, 579–584, doi:10.1038/ngeo1832. html pdf Press Release

2012

Robinson, R. S., Kienast, M., Albuquerque, A. L., Altabet, M., Contreras Quintana, S., De Pol Holz, R., Dubois, N., Francois, R., Galbraith, E., Hsu, T.-C., Ivanochko, T., Jaccard, S., Kao, S.-J., Kiefer, T., Kienast, S., Lehmann, M., Martinez, P., McCarthy, M., Möbius, J., Pedersen, T., Quan, T. M., Ryabenko, E., Schmittner, A., Schneider, R., Schneider-Mor, A., Shigemitsu, M., Sinclair, D., Somes, C., Studer, A., Thunell, R., and Yang, J.-Y. (2012) A review of nitrogen isotopic alteration in marine sediments, Paleoceanogr., 24, PA4203, doi: 10.1029/2012PA002321. html

Ahn, J., Brook, E. J., Schmittner, A., and Kreutz, K. (2012) Abrupt change in atmospheric CO2 during the last ice age, Geophys. Res. Lett., 39, L18711, doi:10.1029/2012GL53018. html

Schmittner, A., Urban N. M., Shakun, J. D., Mahowald, N. M., Clark, P. U., Bartlein, P. J., Mix, A. C., and Rosell-Melé, A. (2012) Response to Comment on “Climate Sensitivity Estimated From Temperature Reconstructions of the Last Glacial Maximum”, Science, 337, 1294, doi: 10.1126/science.1221634. html Comment by Fyke and Eby

Pinsonneault, A. J., Matthews, H. D., Galbraith, E. D., and Schmittner, A. (2012) Calcium carbonate production response to future ocean warming and acidification, Biogeosciences, 9, 2351-2364, doi:10.5194/bg-9-2351-2012. html pdf

Ross, A., Matthews, H. D., Schmittner, A., and Kothavala, Z. (2012) Assessing the Effects of Ocean Diffusivity and Climate Sensitivity on the Rate of Global Climate Change, Tellus B, 64, 17733, doi:10.3402/tellusb.v64i0.17733. html

Shakun, J. D., Clark, P. U., He, F., Marcott, S. A., Mix, A. C., Liu, Z., Otto-Bliesner, B., Schmittner, A., and Bard, E. (2012) Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation, Nature, 484, 49-54, doi:10.1038/nature10915. html

Zhang, X., Prange, M., Steph, S., Butzin, M., Krebs, U., Lunt, D. J., Nisancioglu, K. H., Park, W., Schmittner, A., Schneider, B., Schulz, M. (2012) Changes in equatorial Pacific thermocline depth in response to Panamanian Seaway closure: Insights from a multi-model study, Earth and Planet. Sci. Lett., 317-318, 76-84, doi:10.1016/j.epsl.2011.11.028. html

2011

Schmittner, A., Urban N. M., Shakun, J. D., Mahowald, N. M., Clark, P. U., Bartlein, P. J., Mix, A. C., and Rosell-Melé, A. (2011) Climate Sensitivity Estimated From Temperature Reconstructions of the Last Glacial Maximum, Science, 334, 1385-1388,doi: 10.1126/science.1203513. Abstract pdf data

Zickfeld, K., Eby, M., Matthews, H. D., Schmittner, A., and Weaver, A. J. (2011) Nonlinearity of carbon cycle feedbacks, J. Climate, 24,4255–4275, doi: 10.1175/2011JCLI3898.1. html

Marcott, S. A., Clark, P. U., Padman, L., Klinkhammer, G. P., Springer, S., Liu, Z., Otto-Bliesner, B. L., Carlson, A. E., Ungerer, A., Padman, J., He, F., Cheng, J. and Schmittner, A., (2011) Ice-shelf collapse from subsurface warming as a trigger for Heinrich events, Proc. Nat. Acad. Sci., 108 (33), 13415-13419, doi:10.1073/pnas.1104772108 html

Schmittner, A., Silva, T. A. M., Fraedrich, K., Kirk, E. and Lunkeit, F. (2011) Effects of Mountains and Ice Sheets on Global Ocean Circulation, J. Climate, 24, 2814–2829, doi:10.1175/2010JCLI3982.1. html Press Release

Alder, C. J., Hostetler, S. W., Pollard, D., and Schmittner, A. (2011) Evaluation of a present-day climate simulation with a new coupled atmosphere-ocean model GENMOM, Geosi. Model Dev., 4, 69-83, doi:10.5194/gmd-4-69-2011. html

2010

Somes, C. J., Schmittner, A. and Altabet, M. A. (2010) Nitrogen isotope simulations show the importance of atmospheric iron deposition for nitrogen fixation across the Pacific Ocean, Geophys. Res. Lett., 37, L23605, doi:10.1029/2010GL044537. html

Goes, M., Urban, N. M., Tonkonojenkov, R., Haran, M., Schmittner, A., and Keller, K., (2010) What is the skill of ocean tracers in reducing uncertainties about ocean diapycnal mixing and projections of the Atlantic Meridional Overturning Circulation?, J. Geophys. Res., 115, C12006, doi:10.1029/2010JC006407. html

Somes, C. J., Schmittner, A., Galbraith, E. D., Lehmann, M. F., Altabet, M. A., Montoya, J. P., Letelier, R. M., Mix, A. C., Bourbonnais, A., and Eby, M. (2010) Simulating the global distribution of nitrogen isotopes in the ocean, Global Biogeochem. Cycles, 24, GB4019, doi:10.1029/2009GB003767.  html

2009

Schmittner, A., N. M. Urban, K. Keller, and D. Matthews (2009) Using tracer observations to reduce the uncertainty of ocean diapycnal mixing and climate–carbon cycle projections, Global Biogeochem. Cycles, 23, GB4009, doi:10.1029/2008GB003421. html

Sarnthein, M., G. Bartoli, M. Prange, A. Schmittner, B. Schneider, M. Weinelt, N. Andersen, and D..Garbe-Schonberg (2009) Mid-Pliocene shifts in ocean overturning circulation and the onset of Quaternary-style climates, Clim. Past, 5, 269-283, doi:10.5194/cp-5-269-2009. html

2008

Schmittner, A., E. D. Galbraith (2008) Glacial greenhouse gas fluctuations controlled by ocean circulation changes, Nature, 456, 373-376, doi:10.1038/nature07531. html

Oschlies, A., K. G. Schulz, U. Riebesell, and A. Schmittner (2008) Simulated 21st century's increase in oceanic suboxia by CO2-enhanced biotic carbon export, Global Biogeochem. Cycles, 22, GB4008, doi:10.1029/2007GB003147. html

Schmittner, A., A. Oschlies, H. D. Matthews, and E. D. Galbraith (2008) Future changes in climate, ocean circulation, ecosystems and biogeochemical cycling simulated for a business-as-usual CO2 emission scenario until year 4000 AD, Global Biogeochem. Cycles, 22, GB1013, doi:10.1029/2007GB002953. html Correction

2007

Clark, P. U., S. W. Hostetler, N. G. Pisias, A. Schmittner, and K. J. Meissner (2007) Mechanisms for a ~7-kyr climate and sea-level oscillation during marine isotope stage 3, in Ocean Circulation: Mechanisms and Impacts, AGU Geophys. Monograph, vol. 173, edited by Schmittner, A., J. Chiang, and S. Hemming, pp. 315-334, American Geophysical Union.

Schmittner, A., E. Brook and J. Ahn (2007) Impact of the ocean’s overturning circulation on atmospheric CO2, in Ocean Circulation: Mechanisms and Impacts, AGU Geophysical Monograph Series, vol. 173, edited by A. Schmittner, J. Chiang, and S. Hemming, pp. 209-246, American Geophysical Union.

Schmittner, A., E. D. Galbraith, S. W. Hostetler, T. F. Pedersen, and R. Zhang (2007) Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water subduction, Paleoceanogr., 22, PA3207, doi:10.1029/2006PA001384. html data available at ftp://ftp.ncdc.noaa.gov/pub/data/paleo/gcmoutput/uvic/schmittner2007/

Schneider, B., M. Latif, and A. Schmittner (2007) Evaluation of different methods to assess model projections of the future evolution of the Atlantic meridional overturning circulation, J. Climate, 20, 2121-2132.

2006

Schneider, B. and A. Schmittner (2006) Simulating the impact of the Panamanian seaway closure on ocean circulation, marine productivity and nutrient cycling, Earth and Planet. Sci. Lett., 246, 367–380.

2005

Schmittner, A., Latif, M. and Schneider, B. (2005) Model Projections of the North Atlantic thermohaline circulation for the 21st century assessed by observations, Geophys. Res. Lett., 32, L23710, doi:10.1029/2005GL024368. html

Schmittner, A., Oschlies, A., Giraud, X., Eby, M. and Simmons H.L. (2005) A Global Model of the Marine Ecosystem for Long Term Simulations: Sensitivity to Ocean Mixing, Buoyancy Forcing, Particle Sinking and Dissolved Organic Matter Cycling, Global Biogeochem. Cycles, 19, GB3004, doi:10.1029/2004GB002283. html

Schmittner, A., (2005) Decline of the marine ecosystem caused by a reduction in the Atlantic overturning circulation, Nature, 434, 628-633. html

Koesters, F., R. H. Kaese, A. Schmittner and P. Herrmann (2005) The Effect of Denmark Strait Overflow on the Atlantic Meridional Overturning Circulation, Geophys. Res. Lett., 32, L04602, doi:10.1029/2004GL022112. html

2004

Schmittner, A., M. Sarnthein, H. Kinkel, G. Bartoli, T. Bickert, M. Crucifix, D. Crudeli, J. Groeneveld, F. Kösters, U. Mikolajewicz, C. Millo, J. Reimer, P. Schäfer, D. Schmidt, B. Schneider, M. Schulz, S. Steph, R. Tiedemann, M. (2004) Global Impact of the Panamanian Seaway Closure, EOS, 85, 526.

Saenko, O. A., Schmittner, A. and A. J. Weaver (2004) The Atlantic-Pacific seesaw, J. Climate, 17, 2033-2038.

Ewen, T., A.J. Weaver and A. Schmittner (2004) Modelling carbon cycle feedbacks during abrupt climate change, Quat. Sci. Rev., 23, 431-448.

2003

Saenko, O. A., A. J. Weaver and A. Schmittner (2003) Atlantic deep circulation controlled by freshening in the Southern Ocean, Geophys. Res. Lett., 30, 1754, doi:10.1029/2003GL017681. html

Schmittner, A. (2003) Southern Ocean sea ice and radiocarbon ages of glacial bottom waters, Earth and Planet. Sci. Lett., 213, 53-62, doi:10.1016/S0012-821X(03)00291-7. html

Meissner, K. J., Schmittner, A. and Weaver, A. J. (2003) The ventilation of the North Atlantic Ocean during the Last Glacial Maximum - a comparison between simulated and observed radiocarbon ages, Paleoceanogr., 18 (2). doi:10.1029/2002PA000762. html

Schmittner, A., Saenko, O. A. and Weaver,A. J. (2003) Coupling of the hemispheres in observations and simulations of glacial climate change, Quat. Sci. Rev., 22, 659-671.doi:10.1016/S0277-3791(02)00184-1. html

2002

Saenko, O. A., Schmittner, A. and Weaver, A. J. (2002) On the role of wind-driven sea ice motion on ocean ventilation, J. Phys. Oceanogr., 32, 3376-3395.

Meissner, K. J., Schmittner, A., Wiebe, E. C. and Weaver, A. J. (2002) Simulations of Heinrich Events in a coupled ocean-atmosphere-sea ice model, Geophys. Res. Lett., 17, 10.1029/2001GL013514.

Schmittner, A., Meissner, K. J., Eby, M. and Weaver, A. J. (2002) Forcing of the deep ocean circulation in simulations of the Last Glacial Maximum, Paleoceanogr., 17, 10.1029/2001PA000633. html

Schmittner, A. and Clement, A. C. (2002) Sensitivity of the thermohaline circulation to tropical and high latitude freshwater forcing during the last glacial-interglacial cycle, Paleoceanogr., 17, 10.1029/2000PA000591. html

Schmittner, A., Yoshimori, M. and Weaver, A. J. (2002) Instability of glacial climate in a model of the ocean-atmosphere-cryosphere system, Science, 295, 1489-1493. Abstract 

2001

Weaver, A. J., Eby, M., Wiebe, E. C., Bitz, C. M., Duffy, P. B., Ewen, T. L., Fanning, A. F., Holland, M. M., MacFadyen, A., Saenko, O., Schmittner, A., Wang, H. and Yoshimori,M. (2001) The UVic Earth System Climate Model: Model Description, Climatology and Applications to Past, Present and Future Climates, Atmos.-Ocean, 4, 361-428.

Schmittner, A. and Weaver, A. J. (2001) Dependence of multiple climate states on ocean mixing parameters, Geoph. Res. Let., 28, 1027-1030.

Schmittner, A. and Stocker, T. F., (2001) A seasonally forced model for paleoclimate studies, J. Climate, 14, 1055-1068.

2000

Appenzeller, C., Stocker, T.F., and Schmittner, A. (2000) Climate change and natural climate variability: chance for surprise? Integr. Assessment, 1, 301-306.

Schmittner, A., Appenzeller, C. and Stocker, T. F. (2000) Enhanced Atlantic freshwater export during El Nino, Geoph. Res. Let., 27, 1163-1166.

Schmittner, A., Appenzeller, C. and Stocker, T. F. (2000) Validation of parametrisations for the meridional energy and moisture transport used in simple climate models, Clim. Dyn., 16, 63-77.

1999

Joos, F., Plattner, G.-K., Stocker, T.F., Marchal, O. and Schmittner, A. (1999) Global warming and marine carbon cycle feedbacks on future atmospheric CO2, Science, 284, 464-467. Abstract

Schmittner, A. and Stocker, T. F. (1999) The stability of the thermohaline circulation in global warming experiments, J. Climate, 12,1117-1133.

1997

Stocker, T. F. and Schmittner, A. (1997) Influence of CO2 emission rates on the stability of the thermohaline circulation, Nature, 388, 862-865. html

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