Geoscientific Model Development www.geosci-model-dev.net 1991-959X 1991-9603 1 1 2008 10.5194/gmd-1-1-2008 http://www.geosci-model-dev.net/1/1/2008/ http://www.geosci-model-dev.net/1/1/2008/gmd-1-1-2008.html http://www.geosci-model-dev.net/1/1/2008/gmd-1-1-2008.pdf 1 15 2008-08-04 First description of the Minnesota Earth System Model for Ocean biogeochemistry (MESMO 1.0) K. Matsumoto katsumi@umn.edu K. S. Tokos A. R. Price S. J. Cox Department of Geology and Geophysics, University of Minnesota, Minneapolis, USA School of Engineering Sciences, University of Southampton, Southampton, UK Here we describe the first version of the Minnesota Earth System Model for Ocean biogeochemistry (MESMO 1.0), an intermediate complexity model based on the Grid ENabled Integrated Earth system model (GENIE-1). As with GENIE-1, MESMO has a 3D dynamical ocean, energy-moisture balance atmosphere, dynamic and thermodynamic sea ice, and marine biogeochemistry. Main development goals of MESMO were to: (1) bring oceanic uptake of anthropogenic transient tracers within data constraints; (2) increase vertical resolution in the upper ocean to better represent near-surface biogeochemical processes; (3) calibrate the deep ocean ventilation with observed abundance of radiocarbon. We achieved all these goals through a combination of objective model optimization and subjective targeted tuning. An important new feature in MESMO that dramatically improved the uptake of CFC-11 and anthropogenic carbon is the depth dependent vertical diffusivity in the ocean, which is spatially uniform in GENIE-1. In MESMO, biological production occurs in the top two layers above the compensation depth of 100 m and is modified by additional parameters, for example, diagnosed mixed layer depth. In contrast, production in GENIE-1 occurs in a single layer with thickness of 175 m. These improvements make MESMO a well-calibrated model of intermediate complexity suitable for investigations of the global marine carbon cycle requiring long integration time. Bryan, K. and Lewis, L. J.: A water mass model of the world ocean, J. Geophys. Res., 84, 2503–2518, 1979. Chikamoto, M. O., Matsumoto, K., and Ridgwell, A.: Response of deep-sea CaCO₃ sedimentation to Atlantic meridional overturning circulation shutdown, J. Geophys. Res., doi:10.1029/2007JG000669, in press, 2008. Claussen, M., Mysak, L. A., Weaver, A., Crucifix, M., Fichefet, T., Loutre, M. F., Weber, S. L., Alcamo, J., Alexeev, V., Berger, A., Calov, R., Ganopolski, A., Goosse, H., Lohmann, G., Lunkeit, F., Mokhov, I. I., Petoukhov, V., Stone, P. and Wang, Z.: Earth system models of intermediate complexity: Closing the gap in the spectrum of climate system models, Clim. Dynam., 18, 579–586, 2002. Doney, D. C., Lindsay, K., Fung, I., and Jasmin, J.: Natural variability in a stable, 1000-year global coupled climate-carbon cycle simulation, J. Climate, 19(13), 3033–3054, 2006. Doney, S. C., Lindsay, K., Caldeira, K., Campin, J.-M., Drange, H., Dutay, J.-C., Follows, M., Gao, Y., Gnanadesikan, A., Gruber, N., Ishida, A., Joos, F., Madec, G., Maier-Reimer, E., Marshall, J. C., Matear, R. J., Monfray, P., Najjar, R., Orr, J. C., Plattner, G.-K., Sarmiento, J., Schlitzer, R., Slater, R., Swathi, P. S., Totterdell, I. J., Weirig, M.-F., Yamanaka, Y., and Yool, A.: Evaluating global ocean carbon models: The importance of realistic physics, Global Biogeoch. Cy., 18, GB3017, doi:10.1029/2003GB002150, 2004. Duffy, P. B., Caldeira, K., Selvaggi, J., and Hoffert, M. I.: Effects of subgrid-scale mixing parameterizations on simulated distributions of natural 14C, temperature and salinity in a three-dimensional ocean general circulation model, J. Phys. Oceanogr., 27, 498–523, 1997. Dutay, J.-C., Bullister, J. L., Doney, S. C., Orr, J. C., Najjar, R., Caldeira, K., Campin, J.-M., Drange, H., Follows, M., Gao, Y., Gruber, N., Hecht, M. W., Ishida, A., Joos, F., Lindsay, K., Madec, G., Maier-Reimer, E., Marshall, J. C., Matear, R. J., Monfray, P., Plattner, G.-K., Sarmiento, J., Schlitzer, R., Slater, R., Totterdell, I. J., Weirig, M.-F., Yamanaka, Y., and Yool, A.: Evaluation of ocean model ventilation with CFC-11: Comparison of 13 global ocean models, Ocean Model., 4, 89–120, 2002. Edwards, N. R. and Marsh, R.: Uncertainties due to transport-parameter sensitivity in an efficient 3-D ocean-climate model, Clim. Dynam., 24, 415–433, 2005. Edwards, N. R., Willmott, A. J., and Killworth, P. D.: On the role of topography and wind stress on the stability of the thermohaline circulation, J. Phys. Oceanogr., 28, 756–778, 1998. England, M. H. and Rahmstorf, S.: Sensitivity of ventilation rates and radiocarbon uptake to subgrid-scale mixing in ocean models, J. Phys. Oceanogr., 29, 2802–2827, 1999. Gnanadesikan, A., Dunne, J. P., Key, R. M., Matsumoto, K., Sarmiento, J. L., Slater, R. D., and Swathi, P. S.: Oceanic ventilation and biogeochemical cycling: Understanding the physical mechanisms that produce realistic distributions of tracers and productivity, Global Biogeochem. Cy., 18, GB4010, doi:10.1029/2003GB002097, 2004. Griffies, S. M.: The Gent-McWilliams skew flux, J. Phys. Oceanogr., 28(5), 831–841, 1998. Griffies, S. M., Harrison, M. J., Pacanowski, R., and Rosati, A.: A technical guide to MOM4, in: GFDL ocean group technical report No 5, NOAA/Geophysical Fluid Dynamics Laboratory, 2004. Gruber, N. and Sarmiento, J. L.: Global patterns of marine nitrogen fixation and denitrification, Global Biogeochem. Cy., 11, 235–266, 1997. Houghton, J. T., Ding, Y., Griggs, D. J., Noguer, M., van der Linden, P. J., and Xiaosu, D.: Climate Change 2001 – The Scientific Basis: Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, 944 pp., 2001. IPCC: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, 996 pp., 2007. Key, R., Kozyr, A., Sabine, C., Lee, K., Wannikhof, R., Bullister, J. L., Feeley, R. A., Millero, F., Mordy, C., and Peng, T.-H.: A global ocean carbon climatology: Results from GLODAP, Global Biogeochem. Cy., 18, GB4031, doi:10.1029/2004GB002247, 2004. Laws, E. A., Falkowski, P. G., Smith, W. O. J., Ducklow, H., and McCarthy, J. J.: Temperature effects on export production in the open ocean, Global Biogeochem. Cy., 14, 1231–1246, 2000. Ledwell, J. R., Montgomery, E. T., Polzin, K. L., St Laurent, L. C., Schmitt, R. W., and Toole, J.: Evidence for enhanced mixing over rough topography in the abyssal ocean, Nature, 403, 179–182, 2000. Ledwell, J. R., Watson, A. J., and Law, C. S.: Evidence for slow mixing across the pycnocline from an open-ocean tracer-release experiment, Nature, 364, 701–703, 1993. Ledwell, J. R., Watson, A. J., and Law, C. S.: Mixing of a tracer in the pycnocline, J. Geophys. Res., 103, 21 499–21 529, 1998. Lenton, T. M., Marsh, R., Price, A. R., Lunt, D. J., Aksenov, Y., Annan, J. D., Cooper-Chadwick, T., Cox, J. D., Edwards, N. R., Goswami, S., Hargreaves, J. C., Harris, P. P., Jiao, Z., Livina, V. N., Payne, A. J., Rutte, I. C., Shepherd, J. G., Valdes, P. J., Williams, G., Williamsson, M. S., and Yool, A.: Effects of atmospheric dynamics and ocean resolution on bi-stability of the thermohaline circulation examined using the Grid ENabled Integrated Earth system modelling (GENIE) framework, Clim. Dynam., 29, 591–613, doi:10.1007/s00382-007-0254-9, 2007. Lenton, T. M., Williamson, M. S., Edwards, N. R., Marsh, R., Price, A. R., Ridgwell, A., Shepherd, J. G., and The Genie team: Millenial timescale carbon cycle and climate change in an efficient Earth system model, Clim. Dynam., 26(7–8), 687–711, doi:10.1007/s00382-006-0109-9, 2006. Levitus, S.: Climatological atlas of the world ocean, National Oceanic and Atmos. Admin., Rockville, Md., 1982. Levitus, S. and Boyer, T. P.: World ocean atlas 1994, Vol 2, Oxygen, National Oceanic and Atmospheric Administration, Washington, 186 pp., 1994a. Levitus, S. and Boyer, T. P.: World ocean atlas 1994, Vol 4, Temperature, National Oceanic and Atmospheric Administration, Washington, 117 pp., 1994b. Maier-Reimer, E.: Geochemical cycles in an ocean general circulation model. Preindustrial tracer distributions, Global Biogeochem. Cy., 7(3), 645–677, 1993. Marsh, R., Hazeleger, W., Yool, A., and Rohling, E. J.: Stability of the thermohaline circulation under millenial CO₂ forcing and two alternative controls on Atlantic salinity, Geophys. Res. Lett., 34, L03605, doi:10.1029/2006GL027815, 2007. Marsh, R., Yool, A., Lenton, T. M., Gulamali, M. Y., Edwards, N. R., Shepherd, J. G., Krznaric, M., Newhouse, S., and Cox, S. J.: Bistability of the thermohaline circulation identified through comprehensive 2-parameter sweeps of an efficient climate model, Clim. Dynam., 23, 761–777, 2004. Martin, J. H., Knauer, G. A., Karl, D. M., and Broenkow, W. W.: VERTEX: Carbon cycling in the northeast Pacific, Deep Sea Res., 34, 267–285, 1987. Matsumoto, K.: Biology-mediated temperature control on atmospheric pCO₂ and ocean biogeochemistry, Geophys. Res. Lett., 34, L20605, doi:10.1029/2007GL031301, 2007. Matsumoto, K. and Gruber, N.: How accurate is the estimation of anthropogenic carbon in the ocean? An evaluation of the $\Delta $C* method, Global Biogeochem. Cy., 19, GB3014, doi:10.1029/2004GB002397, 2005. Matsumoto, K., Sarmiento, J. L., Key, R. M., Aumont, O., Bullister, J. L., Caldeira, K., Campin, J.-M., Doney, S. C., Drange, H., Dutay, J.-C., Follows, M., Gao, Y., Gnanadesikan, A., Gruber, N., Ishida, A., Joos, F., Lindsay, K., Maier-Reimer, E., Marshall, J. C., Matear, R. J., Monfray, P., Mouchet, A., Najjar, R., Plattner, G.-K., Schlitzer, R., Slater, R., Swathi, P. S., Totterdell, I. J., Weirig, M.-F., Yamanaka, Y., Yool, A., and Orr, J. C.: Evaluation of ocean carbon cycle models with data-based metrics, Geophys. Res. Lett., 31, L07303, doi:10.1029/2003GL018970, 2004. Muller, S. A., Joos, F., Edwards, N. R., and Stocker, T.: Water mass distribution and ventilation time scales in cost-efficient, 3-dimensional ocean model, J. Climate, 19, 5479–5499, 2006. Najjar, R. G., Jin, X., Louanchi, F., Aumont, O., Caldeira, K., Doney, S. C., Dutay, J.-C., Follows, M., Gruber, N., Joos, F., Lindsay, K., Maier-Reimer, E., Matear, R. J., Matsumoto, K., Monfray, P., Mouchet, A., Orr, J. C., Plattner, G. K., Sarmiento, J. L., Schlitzer, R., Weirig, M. F., Yamanaka, Y., and Yool, A.: Impact of circulation on export production, dissolved organic matter and dissolved oxygen in the ocean: Results from OCMIP-2, Global Biogeochem. Cy., 21, GB3007, doi:10.1029/2006GB002857, 2007. Najjar, R. G. and Orr, J. C.: Biotic-HOW TO, Internal OCMIP Report, LSCE/CEA Saclay, Gif-sur-Yvette, France, 15 pp., 1999. Pacanowski, R. C. and Griffies, S. M.: The MOM3 Manual, Alpha version, NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, 580 pp., 1999. Price, A. R., Voutchkov, I. I., Pound, G. E., Edwards, N. R., Lenton, T. M., and Cox, S. J.: Multiobjective tuning of Grid-enabled Earth System Models using a Non-dominated Sorting Genetic Algorithm (NSGA-II), in: Proceedings of the 2nd International Conference on eScience and Grid Computing, Amsterdam, Netherlands, p 117, 2006. Ridgwell, A.: Interpreting transient carbonate compensation depth changes by marine sediment core modeling, Paleoceanography, 22, PA4102, doi:10.1029/2006PA001372, 2007. Ridgwell, A., Hargreaves, J. C., Edwards, N. R., Annan, J. D., Lenton, T. M., Marsh, R., Yool, A., and Watson, A.: Marine geochemical data assimilation in an efficient earth system model of global biogeochemical cycling, Biogeosciences, 4, 87–104, 2007. Riebesell, U., Wolf-Gladrow, D. A., and Smetacek, V.: Carbon dioxide limitation of marine phytoplankton growth rates, Nature, 361, 249–251, 1993. Sabine, C. L., Feeley, R. A., Gruber, N., Key, R. M., Lee, K., Bullister, J. L., Wanninkhof, R., Wong, C. S., Wallace, D. W. R., Tilbrook, B., Millero, F. J., Peng, T.-H., Kozyr, A., Ono, T., and Rios, A. F.: The oceanic sink for anthropogenic CO₂, Science, 305, 367–371, 2004. Sarmiento, J. L., Orr, J. C., and Siegenthaler, U.: A perturbation simulation of CO₂ uptake in an ocean general circulation model, J. Geophys. Res., 97(C3), 3621–3646, 1992. Schlitzer, R.: Carbon export in the Southern Ocean: Results from inverse modeling and comparison with satellite-based estimates, Deep Sea Res. II, 49, 1623–1644, 2002. Schmittner, A., Oschlies, A., Giraud, X., Eby, M., and Simmons, H. L.: 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. Cy., 19, GB3004, doi:10.1029/2004GB002283, 2005. Sjoberg, B. and Stigerbrandt, A.: Computations of the geographical distribution of the energy flux to mixing processes via internal tides and the associated vertical circulation in the ocean, Deep-Sea Res., 39(2A), 269–292, 1992. Sverdrup, H. U.: On conditions for the vernal blooming of phytoplankton, Journal de Conseil Permanent International pour l'Exploration de la Mer, 18, 287–295, 1953. Sweeney, C., Gloor, M., Jacobson, A., Key, R., McKinley, G., Sarmiento, J., and Wanninkhof, R.: Constraining global air-sea gas exchange for CO₂ with recent bomb $^14$C measurements, Global Biogeochem. Cy., 21, GB2015, doi:10.1029/2006GB002784, 2007. Wanninkhof, R.: Relationship between wind speed and gas exchange over the ocean, J. Geophys. Res., 97(C5), 7373–7383, 1992. Weaver, A., Eby, M., Wiebe, E. C., Bitz, C. M., Duffy, P. B., Ewen, T. L., Fanning, A. F., Holland, M. M., MacFadyen, A., Matthews, H. D., Meissner, K. J., Saenko, O., Schmittner, A., Wang, H., and Yoshimori, M.: The UVic earth system climate model: Model description, climatology, and applications to past, present and future climates, Atmos. Ocean, 39, 1713–1724, 2001. Willey, D. A., Fine, R. A., Sonnerup, R., Bullister, J. L., Smethie, M. W., and Warner, M. J.: Global oceanic chlorofluorocarbon inventory, Geophys. Res. Lett., 31, L01303, doi:10.1029/2003GL018816, 2004.