scholarly journals Impact of salinization on lake stratification and spring mixing

2021 ◽  
Author(s):  
Robert Ladwig ◽  
Linnea A. Rock ◽  
Hilary A. Dugan
Keyword(s):  
Lake Stratification

Lake stratification and temperature profiles simulated using downscaled GCM output

1998 ◽  
Vol 38 (11) ◽  
pp. 217-226 ◽  
Author(s):  
Hany Hassan ◽  
Toshiya Aramaki ◽  
Keisuke Hanaki ◽  
Tomonori Matsuo ◽  
Robert Wilby
Keyword(s):  
Water Temperature ◽  
Flow Direction ◽  
Future Climate Change ◽  
Temperature Profiles ◽  
Downscaling Method ◽  
Surface Climate ◽  
Statistical Relationships ◽  
June July ◽  
The Uk ◽  
Lake Stratification

A mathematical in-lake water temperature model (WATEMP-Lake) was developed to investigate future responses of lake stratification and temperature profiles to future climate change due to rising concentrations of atmospheric greenhouse gases (GHGs). The model was used to simulate daily water temperature profiles and stratification characteristics in summer (June, July, and August-JJA) for Suwa Lake in Japan as a case study. For future assessments, the model uses surface climate variables obtained from a downscaling method that was applied to the UK Hadley Centre's coupled ocean/atmosphere model forced by combined CO2 and sulphate aerosol changes (HadCM2SUL). The downscaling method employed mean sea level surface pressure to derive three airflow indices identified as: the total shear vorticity (Z) -a measure of cyclonicity -, the strength of the resultant flow (F), and the overall flow direction (D). Statistical relationships between these indices and seven daily meteorological time series were formulated to represent climate variable series at sites around Suwa Lake. These relationships were used to downscale the observed climatology of 1979-1995 and that of 2080-2099 using HadCM2SUL outputs.

scholarly journals Effects of Long-Term Increases in Water Temperature and Stratification on Large Artificial Water-Source Lakes in South Korea

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2341
Author(s):  
Soon-Ju Yu ◽  
Ju-Yeon Son ◽  
Ho-Yeong Kang ◽  
Yong-Chul Cho ◽  
Jong-Kwon Im
Keyword(s):  
South Korea ◽  
Water Temperature ◽  
Aquatic Ecosystems ◽  
Water Source ◽  
Lake Surface ◽  
Lake Water Quality ◽  
Slope Estimator ◽  
Artificial Water ◽  
Lake Stratification

Long-term changes in air and water temperatures and the resulted stratification phenomena were observed for Soyang Lake (SY), Paldang Lake (PD), Chungju Lake (CJ), and Daecheong Lake (DC) in South Korea. Non-parametric seasonal Kendall and Mann-Kendall tests, Sen slope estimator, and potential energy anomaly (PEA) were applied. The lake surface water temperatures (LSWTs) of SY and DC increased at the same rate (0.125 °C/y), followed by those of CJ (0.071 °C/y) and PD (0.06 °C/y). Seasonally, the LSWT increase rates for all lakes, except PD, were 2–3 times higher than the air temperature increase rates. The lake stratification intensity order was similar to those of the LSWT increases and correlations. SY and DC displayed significant correlations between LSWT (0.99) and PEA (0.91). Thus, the LSWT significantly affected stratification when the water temperature increased. PD demonstrated the lowest correlation between LSWT and PEA. Inflow, outflow, rainfall, wind speed, and retention time were significantly correlated, which varied within and between lakes depending on lake topographical, hydraulic, and hydrological factors. Thus, hydraulic problems and nutrients should be managed to minimize their effects on lake water quality and aquatic ecosystems because lake cyanobacteria can increase as localized water temperatures increase.

scholarly journals Physicochemical Differentiation of the Muskau Arch Pit Lakes in the Light of Long-Term Changes

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2368 ◽  
Author(s):  
Małgorzata Oszkinis-Golon ◽  
Marcin Frankowski ◽  
Leszek Jerzak ◽  
Andrzej Pukacz
Keyword(s):  
Physicochemical Characteristics ◽  
Key Factors ◽  
Physicochemical Conditions ◽  
Morphometric Features ◽  
Temporal Differentiation ◽  
Pit Lakes ◽  
Negative Effect ◽  
Oxygen Profiles ◽  
Lake Stratification

Thirteen pit lakes of the Muskau Arch (Western Poland) were studied in the summer season of 2016. The lakes display great geomorphological and hydrochemical diversity. The aim of the study was to characterize temporal changes in the physicochemical conditions of the pit lakes over the last 30 years (1986–2016) and to determine the main factors influencing their evolution. All the lakes were characterized in terms of the same set of physicochemical parameters measured and used for comparative analysis with literature data from the years 1986 and 1992. The results showed significant temporal differentiation in terms of morphometric features and most of the physicochemical characteristics. pH, EC, Ca2+, Mg2+ and total Fe were among the most significantly differentiating parameters. A similar pattern of changes was found for most of the lakes, suggesting natural fluctuations. Despite the differences in values of thermal and oxygen profiles, there were also similarities in lake stratification. Additionally, meromictic conditions were found in 4 lakes. In some of the lakes a negative effect of neutralization and fertilization of the water was observed. Our results showed that the Muskau Arch lakes are subject to dynamic hydrogeological and hydrochemical changes. In addition to natural changes, human-caused transformations were among the key factors responsible for the differentiation of the physicochemical conditions.

scholarly journals Atmospheric stilling and warming air temperatures drive long‐term changes in lake stratification in a large oligotrophic lake

2020 ◽  
Author(s):  
Jonathan T. Stetler ◽  
Scott Girdner ◽  
Jeremy Mack ◽  
Luke A. Winslow ◽  
Taylor H. Leach ◽  
...  
Keyword(s):  
Oligotrophic Lake ◽  
Air Temperatures ◽  
Long Term Changes ◽  
Lake Stratification

Road Salt Impact on Lake Stratification and Water Quality

2012 ◽  
Vol 138 (12) ◽  
pp. 1069-1080 ◽  
Author(s):  
Eric V. Novotny ◽  
Heinz G. Stefan
Keyword(s):  
Water Quality ◽  
Road Salt ◽  
Lake Stratification

Water color affects the stratification, surface temperature, heat content, and mean epilimnetic irradiance of small lakes

2006 ◽  
Vol 63 (11) ◽  
pp. 2447-2455 ◽  
Author(s):  
Jeffrey N Houser
Keyword(s):  
Heat Content ◽  
Thermocline Depth ◽  
Light Penetration ◽  
Small Lakes ◽  
Water Color ◽  
Heat Accumulation ◽  
Temperature Heat ◽  
Lake Temperature ◽  
North Temperate Lakes ◽  
Lake Stratification

The effects of water color on lake stratification, mean epilimnetic irradiance, and lake temperature dynamics were examined in small, north-temperate lakes that differed widely in water color (1.5–19.8 m–1). Among these lakes, colored lakes differed from clear lakes in the following ways: (i) the epilimnia were shallower and colder, and mean epilimnetic irradiance was reduced; (ii) the diel temperature cycles were more pronounced; (iii) whole-lake heat accumulation during stratification was reduced. The depth of the epilimnion ranged from 2.5 m in the clearest lake to 0.75 m in the most colored lake, and 91% of the variation in epilimnetic depth was explained by water color. Summer mean morning epilimnetic temperature was ~2 °C cooler in the most colored lake compared with the clearest lake. In clear lakes, the diel temperature range (1.4 ± 0.7 °C) was significantly (p = 0.01) less than that in the most colored lake (2.1 ± 1.0 °C). Change in whole-lake heat content was negatively correlated with water color. Increasing water color decreased light penetration more than thermocline depth, leading to reduced mean epilimnetic irradiance in the colored lakes. Thus, in these small lakes, water color significantly affected temperature, thermocline depth, and light climate.

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