北冰洋上层双扩散阶梯热通量的分析

宋雪珑; 周生启; IlkerFer

doi:10.3969/j.issn.0253-4193.2014.01.008

北冰洋上层双扩散阶梯热通量的分析

doi: 10.3969/j.issn.0253-4193.2014.01.008

1.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.
Geophysical Institute, University of Bergen, Bergen No-5007, Norway;Bjerknes Centre for Climate Research, Bergen No-5007, Norway

基金项目: 国家自然科学基金项目（41176027；11072253）；广东省自然科学基金重点项目（10251030101000000）；国家全球变化研究重大科学研究计划项目973子课题——南印度洋影响热带印度洋变异的关键海洋大气过程（2010CB950302）。

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出版历程
- 收稿日期: 2013-07-17

Analysis of the double-diffusive heat flux in the upper Arctic Ocean

1.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.
Geophysical Institute, University of Bergen, Bergen No-5007, Norway;Bjerknes Centre for Climate Research, Bergen No-5007, Norway

摘要

摘要: 北冰洋中，低温低盐的上层水与高温高盐的大西洋水之间，广泛存在着稳定的双扩散阶梯。基于锚定剖面仪、冰基剖面仪和微结构剖面仪的数据，对温盐廓线中的阶梯进行研究，分析阶梯的热通量。固定跟踪了锚定剖面仪的3个阶梯，研究阶梯参数随时间的变化。发现由经验公式得出的上下两界面的热通量差，与混合层内热量的变化有较好的相关性。利用微结构剖面仪数据，计算阶梯界面通过分子热传导输送的热通量。当选取最大位温梯度时，算出的传导热通量与经验公式算出的热通量接近。因此，实验室研究得到的热通量经验公式，可以用于计算北冰洋双扩散阶梯的热通量。
- 双扩散阶梯 /
- 北冰洋 /
- 热通量 /
- 分子热传导
Abstract: Double-diffusive staircases are located between the cold, fresh upper water and the warm, salty Atlantic Water in the Arctic Ocean. Based on the data of Moored Profiler, Ice-Tethered Profilers,and Microstructure Profiler, heat flux across the staircases were analyzed. Three staircases in Moored profiles were traced to study the temporal evolution of hydrographical properties of the staircases. Heat flux differences between the upper and lower interfaces were correlated with heat variance of the mixed layer. With the data of Microstructure Profiler, heat flux across the interface was estimated by the assumption of the molecular heat conduction being dominated. When the maximum potential temperature gradient was taken, the result was close to that based on the empirical formula of heat flux. Therefore, it was confirmed that empirical formula of heat flux obtained from the laboratory experiments can be applied in the diffusive convection of the Arcitc Ocean.
- double-diffusive staircase /
- Arctic Ocean /
- heat flux /
- molecular heat conduction

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参考文献(20)

Linden P F, Shirtcliffe T G L. The diffusive interface in double-diffusive convection[J]. Journal of Fluid Mechanics, 1978, 87: 417-432.

Ruddick B, Gargett A E. Oceanic double-diffusion:Introduction[J]. Progress in Oceanography, 2003, 56: 381-393.

Kelley D E, Fernando H J S, Gargett A E, et al. The diffusive regime of double-diffusive convection[J]. Progress in Oceanography, 2003, 56: 461-481.

McLaughlin F, Carmack E, Proshutinsky A, et al. The rapid response of the Canada Basin to climate forcing:From bellwether to alarm bells[J]. Oceanography, 2011, 24(3): 146-159.

Steele M, Morison J, Ermold W, et al. Circulation of summer Pacific halocline water in the Arctic Ocean[J]. Journal of Geophysical Research, 2004, 109: C02027.

曹勇, 赵进平. 2008年加拿大海盆次表层暖水的精细结构的研究[J]. 海洋学报, 2011, 33(2):11-19.

Rudels B, Jones P, Schauer U, et al. Atlantic sources of the Arctic Ocean surface and halocline waters[J]. Polar Research, 2004, 23(2): 181-208.

Turner J S. The melting of ice in the Arctic Ocean:the influence of double-diffusive transport of heat from below[J]. Journal of Physical Oceanography, 2010, 40(1): 249-256.

Timmermans M L, Toole J, Krishfield R, et al. Ice-Tethered Profiler observations of the double-diffusive staircase in the Canada Basin thermocline[J]. Journal of Geophysical Research, 2008, 113: C00A02.

Huppert H E, Turner J S. Double-diffusive convection[J]. Journal of Fluid Mechanics, 1981, 106: 299-329.

Turner J S. The coupled turbulent transport of salt and heat across a sharp density interface[J]. International Journal of Heat Mass Transfer, 1965, 8: 759-767.

Kelley D E. Fluxes through diffusive staircases:A new formulation[J]. Journal of Geophysical Research, 1990, 95: 3365-3371.

Neal V T, Neshyba S, Denner W. Thermal stratification in the Arctic Ocean[J]. Science, 1969, 166: 373-374.

Padman L, Dillon T M. Vertical fluxes through the Beaufort Sea thermohaline staircase[J]. Journal of Geophysical Research, 1987, 92: 799-806.

赵倩, 赵进平. 加拿大海盆双扩散阶梯结构分布与热通量研究[J]. 地球科学进展, 2011, 26(2):193-201.

Polyakov I V, Pnyushkov A, Rember R, et al. Mooring-based observations of double-diffusive staircases over the Laptev Sea slope[J]. Journal of Physical Oceanography, 2012, 42: 95-109.

Sirevaag A, Fer I. Vertical heat transfer in the Arctic Ocean:The role of double-diffusive mixing[J]. Journal of Geophysical Research, 2012, 117: C07010.

Taylor J. The fluxes across a diffusive interface at low values of the density ratios[J]. Deep-Sea Research, 1988, 35: 555-567.

Linden P F. A note on the transport across a diffusive interface[J]. Deep-Sea Research, 1974, 21: 283-287.

Schmid M, Busbridge M, WÜest A. Double-diffusive convection in Lake Kivu[J]. Limnology and Oceanography, 2010, 55(1): 225-238.

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