Effect of climate change on thermal-ice regime of shallow lakes compared to deep lakes: Case study of lakes in the temperate zone (Northern Poland)

The objective of this study is to determine the usefulness of results of hydrological observations (1961-2015) carried out in a deep lake for the assessment changes in the ice-thermal regime of a shallow lake. The paper is based on results of daily values of surface water temperature and ice phenomena in shallow Lake Łebsko and deep Lake Charzykowskie. Similar, statistically significant, positive trends of water temperature were determined in both lakes (0.26°C 10 year-1 in Lake Łebsko and 0.25°C 10 year-1 in Lake Charzykowskie). The fastest increase in mean monthly water temperature in the analysed period (1961-2015) occurred in May (3.37°C in Lake Charzykowskie) and April (2.76°C in Lake Łebsko). The majority of elements of the thermal regime of surface waters in shallow lakes were generally determined to be similar to the same elements in deep lakes, and the effect of climatic changes on the thermal regime of both lakes was found to be similar. Less similarity is observed between elements of the ice regime, particularly in date of decline of the ice cover.

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The thermal response of small and shallow lakes to climate change: new insights from 3D hindcast modelling

Earth System Dynamics ◽

10.5194/esd-12-439-2021 ◽

2021 ◽

Vol 12 (2) ◽

pp. 439-456

Author(s):

Francesco Piccioni ◽

Céline Casenave ◽

Bruno Jacques Lemaire ◽

Patrick Le Moigne ◽

Philippe Dubois ◽

...

Keyword(s):

Climate Change ◽

Water Temperature ◽

Shallow Lakes ◽

Thermal Regime ◽

Meteorological Data ◽

Thermal Response ◽

Thermal Conditions ◽

3D Analysis ◽

Sharp Separation

Abstract. Small, shallow lakes represent the majority of inland freshwater bodies. However, the effects of climate change on such ecosystems have rarely been quantitatively addressed. We propose a methodology to evaluate the thermal response of small, shallow lakes to long-term changes in the meteorological conditions through model simulations. To do so, a 3D thermal-hydrodynamic model is forced with meteorological data and used to hindcast the evolution of an urban lake in the Paris region between 1960 and 2017. Its thermal response is assessed through a series of indices describing its thermal regime in terms of water temperature, thermal stratification, and potential cyanobacteria production. These indices and the meteorological forcing are first analysed over time to test the presence of long-term monotonic trends. 3D simulations are then exploited to highlight the presence of spatial heterogeneity. The analyses show that climate change has strongly impacted the thermal regime of the study site. Its response is highly correlated with three meteorological variables: air temperature, solar radiation, and wind speed. Mean annual water temperature shows a considerable warming trend of 0.6 ∘C per decade, accompanied by longer stratification and by an increase in thermal energy favourable to cyanobacteria proliferation. The strengthening of thermal conditions favourable for cyanobacteria is particularly strong during spring and summer, while stratification increases especially during spring and autumn. The 3D analysis allows us to detect a sharp separation between deeper and shallower portions of the basin in terms of stratification dynamics and potential cyanobacteria production. This induces highly dynamic patterns in space and time within the study site that are particularly favourable to cyanobacteria growth and bloom initiation.

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The influence of treated wastewater from the Lodz city agglomeration on the ice regime and water temperature of the Ner river

Miscellanea Geographica ◽

10.2478/mgrsd-2020-0061 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Adam Bartnik ◽

Paweł Jokiel

Keyword(s):

Global Warming ◽

Water Temperature ◽

Treated Wastewater ◽

River Ice ◽

The Past ◽

Ice Regime ◽

River Water Temperature ◽

Polluted Waters ◽

Ice Phenomena

Abstract The study attempts to answer the following question: Does human impact contribute to changes recorded in the Ner river ice regime? In replying to this question, data on water consumption in Lodz (Łódź) (a city in central Poland) in 1951–2017 were used, as well as observations of ice cover and all ice phenomena for the same period. The ice regime and water temperature of the river have changed over the past 70 years. The changes result not only from changes caused by global warming but also from additional fluctuations in this temperature as determined by changes in the quantity and quality of wastewater discharged into the river from the Lodz city agglomeration. The frequency of ice phenomena in the river decreased, and their duration dropped by almost half. This tendency was compounded by a decrease in number of days with ice phenomena, which in turn was caused by a rapid increase in the amount of waste and thermally polluted waters supplied from Lodz. The river water temperature has now stopped increasing. The course of the river ice regime now resembles that of a natural watercourse again.

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Temporal effects of biocontrol processes on nutrient dynamics in a shallow lake: Case study of Lake Xini, Okavango Delta in Botswana

African Journal of Aquatic Science ◽

10.2989/16085914.2020.1763906 ◽

2020 ◽

pp. 1-9

Author(s):

CN Kurugundla ◽

JC Buru

Keyword(s):

Shallow Lake ◽

Nutrient Dynamics ◽

Okavango Delta ◽

Temporal Effects

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A STUDY ON IMPROVEMENTS FOR A SIMULATION OF DAILY MEAN WATER TEMPERATURE IN A SHALLOW LAKE

Journal of Japan Society of Civil Engineers Ser G (Environmental Research) ◽

10.2208/jscejer.74.i_117 ◽

2018 ◽

Vol 74 (5) ◽

pp. I_117-I_123

Author(s):

Akira WATANUKI ◽

Tadashi YAMADA

Keyword(s):

Water Temperature ◽

Shallow Lake

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Simulating Diurnal Variations of Water Temperature and Dissolved Oxygen in Shallow Minnesota Lakes

Water ◽

10.3390/w13141980 ◽

2021 ◽

Vol 13 (14) ◽

pp. 1980

Author(s):

Bushra Tasnim ◽

Jalil A. Jamily ◽

Xing Fang ◽

Yangen Zhou ◽

Joel S. Hayworth

Keyword(s):

Water Quality ◽

Dissolved Oxygen ◽

Water Temperature ◽

Shallow Lakes ◽

Quality Model ◽

Lake Water Quality ◽

Ecological Processes ◽

Turbulent Diffusion Coefficient ◽

Hourly Data ◽

Mean Square Errors

In shallow lakes, water quality is mostly affected by weather conditions and some ecological processes which vary throughout the day. To understand and model diurnal-nocturnal variations, a deterministic, one-dimensional hourly lake water quality model MINLAKE2018 was modified from daily MINLAKE2012, and applied to five shallow lakes in Minnesota to simulate water temperature and dissolved oxygen (DO) over multiple years. A maximum diurnal water temperature variation of 11.40 °C and DO variation of 5.63 mg/L were simulated. The root-mean-square errors (RMSEs) of simulated hourly surface temperatures in five lakes range from 1.19 to 1.95 °C when compared with hourly data over 4–8 years. The RMSEs of temperature and DO simulations from MINLAKE2018 decreased by 17.3% and 18.2%, respectively, and Nash-Sutcliffe efficiency increased by 10.3% and 66.7%, respectively; indicating the hourly model performs better in comparison to daily MINLAKE2012. The hourly model uses variable hourly wind speeds to determine the turbulent diffusion coefficient in the epilimnion and produces more hours of temperature and DO stratification including stratification that lasted several hours on some of the days. The hourly model includes direct solar radiation heating to the bottom sediment that decreases magnitude of heat flux from or to the sediment.

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Variations of indicative dates of ice regime on Lake Onego based on ground air temperature

Advances in Oceanography and Limnology ◽

10.4081/aiol.2019.8198 ◽

2019 ◽

Vol 10 (1) ◽

Author(s):

Vyacheslav N. Baklagin

Keyword(s):

Air Temperature ◽

Regression Equations ◽

Early Formation ◽

Air Temperatures ◽

Ice Regime ◽

Break Up ◽

Ice Period ◽

Ice Phenomena

The paper shows the changes in the dates (complete freeze-up, ±5 days/°C and complete ice clearance, ±3 days/°C) of the ice regime in Lake Onego depending on changes in average air temperature within the preceding two-month periods (autumn and spring). The regression equations for their calculation based on previous three- and four-month periods according to the 2000-2018 data are also provided. Indicative dates of ice regime based on accumulated air temperatures within the ice period of Lake Onego were also established (early formation of ice phenomena, complete freeze-up phase, beginning of the break-up phase and complete ice clearance). Together with the data on expected air temperature above the lake’s surface, these dependencies enable us to predict the indicative dates of the ice regime.

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Study on Sedimentary Characteristics of Zhang Jia Po Group, Gushi Hollow of Weihe Basin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.772.844 ◽

2013 ◽

Vol 772 ◽

pp. 844-848

Author(s):

Lin Zhang ◽

Jian Chao Liu ◽

Xing Yun Wang ◽

Jian Feng Bai

Keyword(s):

Shallow Lake ◽

Facies Analysis ◽

Sedimentary Facies ◽

Sedimentary Structure ◽

Deep Lake ◽

Sedimentary Characteristics ◽

Rock Types ◽

Single Well ◽

Weihe Basin ◽

Sedimentary Microfacies

Through the paleontology, lithology combination data,For Weihe basin Gushi hollow Tertiary the Zhangjiapo group unified hierarchical total divided into seven sections. According to coring, logging data to study the rock types and sedimentary structure,Summed up the logging of various sedimentary microfacies facies, clear in the study area is a shallow lake - a deeper lake - deep lake - deeper lake - shallow lake cyclic sedimentation.For single well facies analysis of typical wells in the region, the establishment of even well profile, determine the small layer of sedimentary facies the planar distribution concluded sedimentary facies model.

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