Time-series analyses of water temperature and dissolved oxygen concentration in Lake Valkea-Kotinen (Finland) during ice season

Bai, Qinxi; Li, Runling; Li, Zhijun; Leppäranta, Matti; Арвола, Лаури; Li, Ming

doi:10.1016/j.ecoinf.2015.06.009

Cited by 27 publications

(15 citation statements)

References 32 publications

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“…Jackson, 2001Jackson, , 2003 and consequent fish kills (Barica & Mathias, 1979;Fang & Stefan, 2000;Greenbank, 1945;Ruuhijärvi, Rask, Vesala, Westermark, & Lehtovaara, 2010), common in lakes with a long ice cover season (Meding & Jackson, 2001). The prerequisites for under-ice photosynthesis and oxic conditions in winter remain much better in our study lake than in northern temperate boreal lakes, where winter DO depletion exists particularly in eutrophic (Leppäranta, Heini, Jaatinen, & Arvola, 2012) and small humic lakes (Bai et al, 2015), thus suggesting that ecosystem DO consumption exceeds its production.…”

Section: Temperature Differences Between Surface and Bottom Alonementioning

confidence: 71%

Under‐ice metabolism in a shallow lake in a cold and arid climate

Song

Shi

et al. 2019

Freshwater Biology

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Winter is a long period of the annual cycle of many lakes in the northern hemisphere. Low irradiance, ice, and snow cover cause poor light penetration into the water column of these lakes. Therefore, in northern lakes, respiration often exceeds primary production leading to low dissolved oxygen concentrations. This study aimed to quantify under‐ice metabolic processes during winter in an arid zone lake with little snow cover. This study was carried out in a mid‐latitude lake in Inner Mongolia, northern China. The study lake receives relatively high incoming solar radiation on the ice in mid‐winter, and radiation can penetrate down to the bottom sediment as the lake is shallow and the ice lacks snow cover. Primary production and respiration were estimated during two winters using high‐frequency sensor measurements of dissolved oxygen. To quantify under‐ice metabolic processes, sensors were deployed to different depths. During both winters, sensors collected data every 10 min over several weeks. The amount of solar radiation controlled photosynthesis under ice; temperature and photosynthesis together appeared to control respiration. The balance between gross primary production and ecosystem respiration was especially sensitive to changes in snow cover, and the balance between P and R decreased. Our data suggest that photosynthesis by plankton, submerged plants, and epiphytic algae may continue over winter in shallow lakes in mid‐latitudes when there is no snow cover on the ice, as may occur in arid climates. The continuation of photosynthesis under ice buffers against dissolved oxygen depletion and prevents consequent harmful ecosystem effects.

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Section: Temperature Differences Between Surface and Bottom Alonementioning

confidence: 71%

Under‐ice metabolism in a shallow lake in a cold and arid climate

Song

Shi

et al. 2019

Freshwater Biology

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“…Long-term measurements of oxygen at autonomous stations create unique opportunities for studying high-frequency DO variability, providing new knowledge of the processes occurring in ice-covered lakes, which can affect the rate of DO consumption or production [9,[11][12][13]16,20,22,23,39,[54][55][56][57][58].…”

Section: Discussionmentioning

confidence: 99%

Dissolved Oxygen in a Shallow Ice-Covered Lake in Winter: Effect of Changes in Light, Thermal and Ice Regimes

Здоровеннова

Palshin

Golosov

et al. 2021

Water

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Oxygen conditions in ice-covered lakes depend on many factors, which, in turn, are influenced by a changing climate, so detection of the oxygen trend becomes difficult. Our research was based on data of long-term measurements of dissolved oxygen (2007–2020), water temperature, under-ice solar radiation, and snow-ice thickness (1995–2020) in Lake Vendyurskoe (Northwestern Russia). Changes of air temperature and precipitation in the study region during 1994–2020 and ice phenology of Lake Vendyurskoe for the same period based on field data and FLake model calculations were analyzed. The interannual variability of ice-on and ice-off dates covered wide time intervals (5 and 3 weeks, respectively), but no significant trends were revealed. In years with early ice-on, oxygen content decreased by more than 50% by the end of winter. In years with late ice-on and intermediate ice-off, the oxygen decrease was less than 40%. A significant negative trend was revealed for snow-ice cover thickness in spring. A climatic decrease of snow-ice cover thickness contributes to the rise of under-ice irradiance and earlier onset of under-ice convection. In years with early and long convection, an increase in oxygen content by 10–15% was observed at the end of the ice-covered period, presumably due to photosynthesis of phytoplankton.

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“…We multiply both sides of the first equation of system (5) by any ξ in V K (t), and integrate them over Ω K (t) then…”

Section: 1mentioning

confidence: 99%

“…The zero reference level of the depth is the ice-water interface. The lake was frozen on November 8, 2010 and the ice broke up on April 26, 2011 [5].…”

Section: Algorithmmentioning

confidence: 99%

Parameter identification and numerical simulation for the exchange coefficient of dissolved oxygen concentration under ice in a boreal lake

Bai¹,

Li²,

Wang³

et al. 2018

Journal of Industrial &Amp; Management Optimization

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Dissolved oxygen (DO) is one of the main parameters to assess the quality of lake water. This study is intended to construct a parabolic distributed parameter system to describe the variation of DO under the ice, and identify the vertical exchange coefficient K of DO with the field data. Based on the existence and uniqueness of the weak solution of this system, the fixed solution problem of the parabolic equation is transformed into a parameter identification model, which takes K as the identification parameter, and the deviation of the simulated and measured DO as the performance index. We prove the existence of the optimal parameter of the identification model, and derive the first order optimality conditions. Finally, we construct the optimization algorithm, and have carried out numerical simulation. According to the measured DO data in Lake Valkea-Kotinen (Finland), it can be found that the orders of magnitude of the coefficient K varying from 10 −6 to 10 −1 m 2 s −1 , the calculated and measured DO values are in good agreement. Within this range of K values, the overall trends are very similar. In order to get better fitting, the formula needs to be adjusted based on microbial and chemical consumption rates of DO.

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Time-series analyses of water temperature and dissolved oxygen concentration in Lake Valkea-Kotinen (Finland) during ice season

Cited by 27 publications

References 32 publications

Under‐ice metabolism in a shallow lake in a cold and arid climate

Under‐ice metabolism in a shallow lake in a cold and arid climate

Dissolved Oxygen in a Shallow Ice-Covered Lake in Winter: Effect of Changes in Light, Thermal and Ice Regimes

Parameter identification and numerical simulation for the exchange coefficient of dissolved oxygen concentration under ice in a boreal lake

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