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Test and evaluation of a simple parameterization to enhance air-sea coupling in a global coupled model

Fanghua Xu 1

Article ID: 739
Vol 3, Issue 2, 2018, Article identifier:

VIEWS - 679 (Abstract) 136 (PDF)

Abstract

A simple temperature-dependent wind stress scheme is implemented in National Center for Atmospheric Research (NCAR) Community Earth System Model (CESM), aiming to enhance positive wind stress and sea surface temperature (SST) correlation in SST-frontal regions. A series of three-year coupled experiments are conducted to determine a proper coupling coefficient for the scheme based on the agreement of surface wind stress and SST at oceanic mesoscale between model simulations and observations. Afterwards, 80-year simulations with/without the scheme are conducted to explore its effects on simulated ocean states and variability.
The results show that the new scheme indeed improves the positive correlation between SST and wind stress magnitude near the large oceanic fronts. With more realistic surface heat flux and wind stress, the global SST biases are reduced. The global ocean circulation represented by barotropic stream function exhibits a weakened gyre circulation close to the western boundary separation, in agreement with previous studies. The simulation of equatorial Pacific current system is improved as well. The overestimated El Niño Southern Oscillation (ENSO) magnitude in original CESM is reduced by ~30% after using the new scheme with an improved period.


Keywords

SST front; Air-sea interaction; Wind stress; CESM

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References

Chelton DB, Coauthors. Observations of coupling between surface wind stress and sea surface temperature in the eastern tropical Pacific. Journal of Climate 2001; 14: 1479–1498.

O’Neill LW, DB Chelton, SK Esbensen. Observations of SST-induced perturba- tions of the wind stress field over the Southern Ocean on seasonal timescales. Journal of Climate 2003; 16(2): 340–2,354.

Chelton DB, MG Schlax, MH Freilich, et al. Satellite radar measurements reveal short-scale features in the wind stress field over the world ocean. Science, 2004; 303: 978–983.

Xie SP. Satellite observations of cool ocean-atmosphere interaction. Bulletin of the American Meteorological Society (BAMS) 2004, 85: 195–208.

Park KA, PC Cornillon, DL Codiga. Modification of surface winds near ocean fronts: Effects of Gulf Stream rings on scat- terometer (QuikSCAT, NSCAT) wind observa- tions. Geophysical Research Letters 2006; 111: C03021.

Small RJ, SP deSzoeke, SP Xie, et al. Air-sea interaction over ocean fronts and eddies. Dynamics of Atmospheres and Oceans 2008; 45: 274–319.

Chelton DB, SP Xie. Coupled ocean-atmosphere interaction at oceanic mesoscales. Oceanography 2010; 23(4): 52–69.

Zhang RH, Z Li, J Zhu, et al. Impact of tropical instability waves-induced SST forcing on the atmosphere in the tropical Pacific, evaluated using CAM5.1, Atmospheric Science Letters 2014.

Ma X, Coauthors. Western boundary currents regulated by interaction between ocean eddies and the atmosphere. Nature 2016; 535: 533–537.

Gemmrich J, A Monahan. Covariability of near-surface wind speed statistics and mesoscale sea surface temperature fluctuations. Journal of Physical Oceanography 2018; 48(3): 465-478.

Maloney ED, DB Chelton. An assessment of the sea surface temperature influence on surface wind stress in numerical weather prediction and climate models. Journal of Climate 2006; 19(2): 743–2,762.

Song Q, DB Chelton, SK Esbensen, et al. Coupling between sea surface temperature and low-level winds in mesoscale numerical models. Journal of Climate 2009; 22: 146–164.

Kilpatrick T, N Schneider, B Qiu. Boundary layer convergence induced by strong winds across a Midlatitude SST Front. Journal of Climate 2014; 27: 1698–1718.

Spall AM. 2007. Effect of Sea Surface Temperature–Wind Stress Coupling on Baroclinic Instability in the Ocean. Journal of Physical Oceanography 2014; 37(4): 1092-1097.

Gaube P, Chelton DB, Samelson RM, et al. Satellite Observations of Mesoscale Eddy-Induced Ekman Pumping. Journal of Physical Oceanography 2015; 45(1):104-132.

Hogg A, WK Dewar, P Berloff, et al. The Effects of Mesoscale Ocean–Atmosphere Coupling on the Large-Scale Ocean Circulation. Journal of Climate 2009; 22: 4066–4082.

Jin X, C Dong, J Kurian, et al. SST–wind interaction in coastal upwelling: Oceanic simulation with empirical coupling. Journal of Physical Oceanography 2009; 39: 2957–2970.

Small RJ, SP Xie, Y Wang. Numerical simulation of atmospheric response to Pacific tropical instability waves. Journal of Climate 2003; 16: 3723–3741.

Zhang RH, 2014. Effects of tropical instability wave (TIW) - induced surface wind feedback in the tropical Pacific Ocean. Climate Dynamics 2012; 42: 467-485.

O’Neill LW, Chelton DB, Esbensen SK, et al. High-resolution satellite measurements of the atmospheric boundary layer response to SST variations along the Agulhas Return Current. Journal of Climate 2005; 18: 2706–2723.

O'Neill LW, DB Chelton, SK Esbensen. Covariability of surface wind and stress responses to sea-surface temperature fronts. Journal of Climate 2012; 25: 5916–5942.

Chelton DB, MG Schlax, RM Samelson. Summertime coupling between sea surface temperature and wind stress in the California Current System. Journal of Physical Oceanography 2007, 37: 495–517.

Feliks Y, M Ghil, E Simonnet. Low-frequency variability in the midlatitude atmosphere induced by an oceanic thermal front. Journal of the Atmospheric Sciences 2004; 61: 961–981.

Minobe S, Kuwano-Yoshida A, Komori N, et al. Influence of the Gulf Stream on the troposphere. Nature, 2008; 452: 206–209.

Hayes SP, McPhaden MJ, Wallace JM. The influence of sea surface temperature on surface wind in the eastern equatorial Pacific: Weekly to monthly variability. Journal of Climate 1989; 2: 1500–1506.

Wallace J, T Mitchell, C Deser. The influence of sea-surface temperature on surface wind in the eastern equatorial Pacific: Seasonal and interannual variability. Journal of Climate 1989; 2: 1492–1499.

Lindzen RS, Nigam S. On the role of sea surface temperature gradients in forcing low level winds and convergence in the tropics. Journal of the Atmospheric Sciences 1987; 44: 2418–2436.

Wai MMK, Stage SA. Dynamical analyses of marine atmospheric boundary layer structure near the Gulf Stream oceanic front. Quarterly Journal of the Royal Meteorological Society 1989; 115: 29–44.

Schneider N, B Qiu. The atmospheric response to weak sea surface temperature fronts. Journal of the Atmospheric Sciences 2015; 72: 3356-3377.

Bryan FO, R Tomas, JM Dennis, et al. Frontal scale air–sea interaction in high-resolution coupled climate models. Journal of Climate 2010; 23: 6277–6291.

Hurrell JW, coauthors. The Community Earth System Model: A Framework for Collaborative Research. Bulletin of the American Meteorological Society (BAMS) 2013; 94: 1339–1360.

Gettelman A, Coauthors. Global simulations of ice nucleation and ice supersaturation with an improved cloud scheme in the Community Atmosphere Model. Journal of Geophysical Research 2010; 115: D18216.

Neale RB, Coauthors. Description of the NCAR Community Atmosphere Model (CAM5.0). NCAR Tech. 2010. Note NCAR/TN-486+STR, 268 pp.

Smith RD, Coauthors. The Parallel Ocean Program (POP) reference manual, ocean component of the Community Climate System Model (CCSM). Los Alamos National Laboratory Tech. Rep. LAUR-10-01853 2010; 141.

Large WG, SG Yeager. The global climatology of an interannually varying air-sea flux data set. Climate Dynamics 2009; 33: 341-364.

Large WB. Surface fluxes for practitioners of global ocean data assimilation. In: Chassignet E.P., Verron J. (eds) Ocean Weather Forecasting. Springer, Dordrecht 2006; 229-270.

Gent PR, G Danabasoglu, LJ Donner, et al. The Community Climate System Model Version 4 Journal of Climate 2011; 24: 4973–4991.

Levitus S, Boyer T, Conkwright M, et al. Introduction, vol 1. World Ocean Database 1998, NOAA Atlas NESDIS 1998; 18: 346.

Danabasoglu G, SC Bates, BP Briegleb, S. et al. The CCSM4 ocean component. Journal of Climate 2012; 25: 1361–1389.

Large WG, S Pond. Sensible and latent-heat flux measurements over the Ocean. Journal of Physical Oceanography 1982; 12(5): 464-482.

Johnson G, B Sloyan, W Kessler, et al. Direct measurements of upper ocean currents and water properties across the tropical Pacific during the 1990s. Progress in Oceanography 2002; 52: 31–61.

Deser C, AS Phillips, RA Tomas, et al. ENSO and Pacific decadal variability in the community climate system model version 4. Journal of Climate 2012; 25: 2622–2651.

Manganello JV, B Huang. The influence of systematic errors in the Southeast Pacific on ENSO variability and prediction in a Coupled GCM. Climate Dynamics 2009.

Imada Y, M Kimoto. Parameterization of tropical instability waves and examination of their impact on ENSO characteristics. Journal of Climate 2012; 25: 4568–4581.

Kirtman, BP, Bitz C, Bryan F, et al. Impact of ocean model resolution on CCSM climate simulations. Climate Dynamics 2012; 39: 1303.


DOI: http://dx.doi.org/10.18063/som.v3i3.739
(679 Abstract Views, 136 PDF Downloads)

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