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Determination of diapycnal diffusion rates in the upper thermocline in the North Atlantic Ocean using sulfur hexafluoride

Cited 8 time in scopus
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Title
Determination of diapycnal diffusion rates in the upper thermocline in the North Atlantic Ocean using sulfur hexafluoride
Other Titles
Sulfur hexafluoride를 이용한 북대서양의 upper thermocline 에서의 diapycnal 확산률 결정
Authors
Chang, Yoon-Seok
Jia-Zhong Zhang
Lee, Kitack
Kang, H.S.
Choi, Sung-Deuk
Kim, D.O.
Subject
Life Sciences & Biomedicine - Other Topics; Physiology
Keywords
North Atlantic Ocean; diapycnal diffusivity; sulfur hexafluoride
Issue Date
2005
Citation
Chang, Yoon-Seok, et al. 2005. "Determination of diapycnal diffusion rates in the upper thermocline in the North Atlantic Ocean using sulfur hexafluoride". JOURNAL OF GEOPHYSICAL RESEARCH, 110(C10010): C10010-C10010.
Abstract
The apparent diapycnal diffusivity below the wind-driven surface mixed layer of the ocean was determined in an anticyclonic eddy in the eastern North Atlantic using sulfur hexafluoride (SF6) tracer data collected in June 1998. In this tracer experiment the downward penetration of SF6 was measured for 3 weeks following the deliberate injection of SF6 in the surface mixed layer. The resulting data were used to constrain the one-dimensional Fickian diffusion model to estimate the diapycnal diffusivity. The model also includes the lateral diffusion component so that it can more accurately represent the time evolution of the SF6 concentrations along the isopycnal surface. This affects the estimation of the diapycnal diffusivity. For the upper thermocline immediately below the surface mixed layer we estimated the diapycnal diffusivity for the 3 week period as 0.3 +/- 0.2 cm(2) s(-1) at a buoyancy frequency of 8.2 cph.
URI
http://repository.kopri.re.kr/handle/201206/6337
DOI
http://dx.doi.org/10.1029/2004JC002835
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