Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL085361 |
Convection-Diffusion Competition Within Mixed Layers of Stratified Natural Waters | |
Steiner, Oscar Sepulveda1; Bouffard, Damien2; Wueest, Alfred1,2 | |
2019-11-20 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:22页码:13199-13208 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | In stratified natural waters, convective processes tend to form nearly homogeneous mixed layers. However, shear-driven turbulence generated by large-scale background flow often rapidly smooths them through mixing with the stratified surroundings. Here we studied the effect of background turbulence on convectively driven mixed layers for the case of bioconvection in Lake Cadagno, Switzerland. Along with microstructure measurements, a diffusive-shape model for the mixed layers allowed us to define (i) mixed layer thickness and (ii) diffusive transition length. Further microstructure analysis was performed allowing estimation of convective turbulence in the mixed layer and shear-driven turbulence quantified by eddy diffusion in their surroundings. Based upon these results, we propose a Peclet number scaling that relates mixed layer shape to the opposing effects of convection and diffusion. We further validate this quantitative approach by applying it to two other distinct convective systems representative of double-diffusive convection and radiatively driven under-ice convection. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000497264300001 |
WOS关键词 | LAKE ; TURBULENCE ; DISSIPATION ; BACTERIA ; BALANCE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/225063 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Ecole Polytech Fed Lausanne, Inst Environm Engn, Margaretha Kamprad Chair, Phys Aquat Syst Lab, Lausanne, Switzerland; 2.Eawag Swiss Fed Inst Aquat Sci & Technol, Dept Surface Waters Res & Management, Kastanienbaum, Switzerland |
推荐引用方式 GB/T 7714 | Steiner, Oscar Sepulveda,Bouffard, Damien,Wueest, Alfred. Convection-Diffusion Competition Within Mixed Layers of Stratified Natural Waters[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(22):13199-13208. |
APA | Steiner, Oscar Sepulveda,Bouffard, Damien,&Wueest, Alfred.(2019).Convection-Diffusion Competition Within Mixed Layers of Stratified Natural Waters.GEOPHYSICAL RESEARCH LETTERS,46(22),13199-13208. |
MLA | Steiner, Oscar Sepulveda,et al."Convection-Diffusion Competition Within Mixed Layers of Stratified Natural Waters".GEOPHYSICAL RESEARCH LETTERS 46.22(2019):13199-13208. |
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