Effects of natural surfactants on the spatial variability of surface water temperature under intermittent light winds on Lake Geneva
Accepted: 31 May 2022
HTML: 125
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Authors
The spatial variability of lake surface water temperature (LSWT) between smooth and rough surface areas and its potential association with the natural surfactant distribution in the surface microlayer were investigated for the first time in a lake. In spring 2019, two different field campaigns were carried out in Lake Geneva to measure: i) the enrichment factor of fluorescent dissolved organic matter (FDOM) as a proxy for biogenic surfactants, and ii) LSWT and near-surface water temperature profiles while simultaneously monitoring water surface roughness in both cases. Results indicate that, under intense incoming short-wave radiation and intermittent light wind conditions, the atmospheric boundary layer (ABL) was stable and the accumulation of heat due to short-wave radiation in near-surface waters was greater than heat losses by surface cooling, thus creating a diurnal warm layer with strong thermal stratification in the water near-surface layer. A threshold wind speed of 1.5 m s-1 was determined as a transition between different dynamic regimes. For winds just above 1.5 m s-1, the lake surface became patchy, and smooth surface areas (slicks) were more enriched with FDOM than rough areas (non-slick) covered with gravity-capillary waves (GCW). Sharp thermal boundaries appeared between smooth and rough areas. LSWT in smooth slicks was found to be more than 1.5°C warmer than in rough non-slick areas, which differs from previous observations in oceans that reported a slight temperature reduction inside slicks. Upon the formation of GCW in non-slick areas, the near-surface stratification was destroyed and the surface temperature was reduced. Furthermore, winds above 1.5 m s-1 continuously fragmented slicks causing a rapid spatial redistribution of LSWT patterns mainly aligned with the wind. For wind speeds below 1.5 m s‑1 the surface was smooth, no well-developed GCW were observed, LSWT differences were small, and strong near-surface stratification was established. These results contribute to the understanding and the quantification of air-water exchange processes, which are presently lacking for stable Atmospheric Boundary Layer conditions in lakes.
Edited by
Marco Toffolon, Department of Civil, Environmentaland Mechanical Engineering, University of Trento, ItalyHow to Cite
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Similar Articles
- Javier Alcocer, Ana C. Ruiz-Fernández, Elva Escobar, Libia H. Pérez-Bernal, Luis A. Oseguera, Vilma Ardiles-Gloria, Deposition, burial and sequestration of carbon in an oligotrophic, tropical lake , Journal of Limnology: Vol. 73 No. 2 (2014)
- Daniela Ghia, Gianluca Fea, Fabio Ercoli, Roberto Sacchi, Escape rooms: behavioural response of two invasive crayfish species under water decline scenarios , Journal of Limnology: Vol. 83 (2024)
- Elisa A.C.C. Alvim, Adriana O. Medeiros, Renan S. Rezende, José F. Gonçalves Júnior, Leaf breakdown in a natural open tropical stream , Journal of Limnology: Vol. 74 No. 2 (2015)
- Anton Brancelj, Uroš Žibrat, Brigita Jamnik, Differences between groundwater fauna in shallow and in deep intergranular aquifers as an indication of different characteristics of habitats and hydraulic connections , Journal of Limnology: Vol. 75 No. 2 (2016)
- Cristina Pulido, Joan Lluís Riera, Enric Ballesteros, Eglantine Chappuis, Esperança Gacia, Predicting aquatic macrophyte occurrence in soft-water oligotrophic lakes (Pyrenees mountain range) , Journal of Limnology: Vol. 74 No. 1 (2015)
- Andrea Gallorini, Jean-Luc Loizeau, Mercury methylation in oxic aquatic macro-environments: a review , Journal of Limnology: Vol. 80 No. 2 (2021)
- Erica E. Scheibler, M. Cristina Claps, Sergio A. Roig-Juñent, Temporal and altitudinal variations in benthic macroinvertebrate assemblages in an Andean river basin of Argentina , Journal of Limnology: Vol. 73 No. 1 (2014)
- Wen Liu, Long Ma, Jinglu Wu, Jilili Abuduwaili, Environmental variability and human activity over the past 140 years documented by sediments of Ebinur Lake in arid central Asia , Journal of Limnology: Vol. 76 No. 3 (2017)
- Mindaugas Zilius, Rutger de Wit, Marco Bartoli, Response of sedimentary processes to cyanobacteria loading , Journal of Limnology: Vol. 75 No. 2 (2016)
- Cleber C. Figueredo, Ricardo M. Pinto-Coelho, Ana Maria M.B. Lopes, Pedro H.O. Lima, Björn Gücker, Alessandra Giani, From intermittent to persistent cyanobacterial blooms: identifying the main drivers in an urban tropical reservoir , Journal of Limnology: Vol. 75 No. 3 (2016)
<< < 10 11 12 13 14 15 16 17 18 19 > >>
You may also start an advanced similarity search for this article.
-
Seyed Mahmood Hamze-Ziabari, Mehrshad Foroughan, Ulrich Lemmin, David Andrew BarryRemote Sensing : 2022
-
Mehrshad Foroughan, Seyed Mahmood Hamze‐Ziabari, Ulrich Lemmin, David Andrew BarryGeophysical Research Letters : 2022