Sensitivity of CFC-11 uptake in a global ocean model to subgrid-scale mixing parameterizations

LI Yang-chun; XU Yong-fu; ZHAO Liang; WANG Ming-xing

Article Contents

Article Navigation > Haiyang Xuebao > 2007 > 29(3): 31-38

LI Yang-chun, XU Yong-fu, ZHAO Liang, WANG Ming-xing. Sensitivity of CFC-11 uptake in a global ocean model to subgrid-scale mixing parameterizations[J]. Haiyang Xuebao, 2007, 29(3): 31-38.

Citation:

LI Yang-chun, XU Yong-fu, ZHAO Liang, WANG Ming-xing. Sensitivity of CFC-11 uptake in a global ocean model to subgrid-scale mixing parameterizations[J]. Haiyang Xuebao, 2007, 29(3): 31-38.

LI Yang-chun, XU Yong-fu, ZHAO Liang, WANG Ming-xing. Sensitivity of CFC-11 uptake in a global ocean model to subgrid-scale mixing parameterizations[J]. Haiyang Xuebao, 2007, 29(3): 31-38.

Citation:

LI Yang-chun, XU Yong-fu, ZHAO Liang, WANG Ming-xing. Sensitivity of CFC-11 uptake in a global ocean model to subgrid-scale mixing parameterizations[J]. Haiyang Xuebao, 2007, 29(3): 31-38.

PDF( 2157 KB)

Sensitivity of CFC-11 uptake in a global ocean model to subgrid-scale mixing parameterizations

1.
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10029, China;Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10029, China
3.
Institute of Physical Oceanography, Ocean University of China, Qingdao, Shandong 266003, China

Received Date: 2006-02-05
Rev Recd Date: 2006-10-28

Abstract

Abstract

It has been pointed out that a subgrid-scale mixing scheme used in the ocean models for the purpose of describing the transport of tracers by mesoscale eddies,proposed by Gent and McWilliams in 1990,can improve the simulation results,compared with the previous mixing scheme.Two main parameters are involved in the scheme: isopycnal diffusivity (A_I) and isopycnalt hickness diffusivity (A_ith).In this paper the influence of the two parameters on the distributions of both active and passive tracers is studied with a global ocean general circulation model (L30T63),which is developed by the Institute of Atmospheric Physics of the Chinese Academy of Sciences.A control case and two sensitive cases are designed to study the sensitivity of the uptake and transport of CFC-11 in the ocean to these two parameters.Simulated results show that these two parameters can obviously affect the distribution of temperature and salinity as well as the oceanic uptake of CFC-11.These two parameters play a different role in the transport of both active and passive tracers.It is known from the analysis of CFC-11 distributions at several sections that the increase of isopycnal diffusivity can generally improve the simulated inventory of CFC-11 in the main storage regions whereas the increase of thickness diffusivity makes the simulated result worse.
- subgrid-scale mixing,
- isopycnal diffusivity,
- isopycnal thickness diffusivity,
- temperature and salinity,
- CFC-11

FullText(HTML)

References(16)

References

GENT P R,McWILLIAMS J C.Isopycnal mixing in ocean circulation models[J].J Phys Oceanogr,1990,20:150-155.

GENT P R,WILLEBRAND J,McDOUGALL T J,et al.Parameterizing eddy-induced tracer transports in ocean circulation models[J].J Phys Oceanogr,1995,25:463-474.

DANABASOGLU G,McWILLIAMS J C,GENT P R.The role of mesoscale tracer transport in the global ocean circulation[J].Science,1994,264:1 123-1 126.

ROBITAILLE D Y,WEAVER A J.Validation of sub-grid-scale mixing schemes using CFCs in a global ocean model[J].Geophys Res Lett,1995,22:2 917-2 920.

ENGLAND M H.Using chlorofluorocarbon to assess ocean climate models[J].Geophys Res Lett,1995,22:3 051-3 054.

ENGLAND M H,HIRST A C.Chlorofluorocarbon uptake in a world ocean model.2.Sensitivity to surface thermohaline forcing and subsurface mixing parameterizations[J].J Geophys Res,1997,102:15 709-15 731.

XU Y,NAKATA K,ISHIDA A,et al.Simulations of chlorofluorucarbon uptake in a model of the North Pacific[J].J Adv Mar Sci Tech Soci,1999,5:1-18.

REDI M H.Oceanic Isopycnal mixing by coordimate rotation[J].J Phys Oceanogr,1982,12:1 154-1 158.

DANABASOGLU G,McWILLIAMS J C.Sensitivity of the global ocean circulation to parameterizations of mesoscale tracer transports[J].J Climate,1995,8:2 967-2 987.

JIN X Z,ZHANG X H,ZHOU T J.Fundamental framework and experiments of the third generation of IAP/LASG world ocean general circulation model[J].Advances in Atmospheric Sciences,1999,16:197-215.

WALKER S J,WEISS R F,SALAMEH P K.Reconstructed histories of the annual mean atmospheric mole fractions for the halocarbons CFC-11,CFC-12,CFC-113,and carbon tetrachloride[J].J Geophys Res,2000,105:14 285-14 296.

WARNER M J,WEISS R F.Solubilities of chlorofluorocarbons 11 and 12 in water and seawater[J].Deep-Sea Res,Part A,1985,32:1 485-1 497.

WANNINKHOF R.Relationship between wind-speed and gas exchange over the ocean[J].J Geophys Res,1992,97:7 373-7 382.

LEVITUS S,BOYER T P.World Ocean Atlas 1994 Volume 4:Temperature[Z].NOAA Atlas NESDIS 4.U.S.Department of Commerce,Washington,D.C.

LEVITUS S,BURGETT R,BOYER T P.World Ocean Atlas 1994 Volume 3:Salinity[Z].NOAA Atlas NESDIS 3.U.S.Department of Commerce,Washington,D.C.

XU Y,WATANABE Y W,AOKI S,et al.Simulations of storage of anthropogenic carbon dioxide in the North Pacific using an ocean general circulation model[J].Marine Chemistry,2000,72:221-238.

Relative Articles

Supplements(0)

Cited By

Proportional views