Observational and energetics constraints on the non-conservation of potential/Conservative Temperature and implications for ocean modelling
Observational and energetics constraints on the non-conservation of potential/Conservative Temperature and implications for ocean modelling
复制标题
对潜在/保守温度不守恒的观测和能量学限制及其对海洋建模的影响
DOI:
10.1016/j.ocemod.2015.02.001
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发表时间:
2015
期刊:
影响因子:
3.2
通讯作者:
Tailleux R
中科院分区:
文献类型:
--
作者:
Tailleux R
This paper seeks to elucidate the fundamental differences between the nonconservation of potential temperature and that of Conservative Temperature, in order to better understand the relative merits of each quantity for use as the heat variable in numerical ocean models. The main result is that potential temperature is found to behave similarly to entropy, in the sense that its nonconservation primarily reflects production/destruction by surface heat and freshwater fluxes; in contrast, the nonconservation of Conservative Temperature is found to reflect primarily the overall compressible work of expansion/contraction. This paper then shows how this can be exploited to constrain the nonconservation of potential temperature and entropy from observed surface heat fluxes, and the nonconservation of Conservative Temperature from published estimates of the mechanical energy budgets of ocean numerical models. Finally, the paper shows how to modify the evolution equation for potential temperature so that it is exactly equivalent to using an exactly conservative evolution equation for Conservative Temperature, as was recently recommended by IOC et al. (2010). This result should in principle allow ocean modellers to test the equivalence between the two formulations, and to indirectly investigate to what extent the budget of derived nonconservative quantities such as buoyancy and entropy can be expected to be accurately represented in ocean models.
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影响因子:
5.2
作者:
Youfang Yan;Zijun Gan;Y. Qi
通讯作者:
Y. Qi
影响因子:
2.7
作者:
J. Pelkowski
通讯作者:
J. Pelkowski
DOI:
10.5402/2012/609701
发表时间:
2012
期刊:
International Scholarly Research Notices
影响因子:
--
作者:
R. Tailleux
通讯作者:
R. Tailleux
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
A. Gnanadesikan;R. Slater;P. Swathi;G. Vallis
通讯作者:
G. Vallis
影响因子:
3.2
作者:
R. Tailleux
通讯作者:
R. Tailleux