Global reconstruction of twentieth century lake surface water temperature reveals different warming trends depending on the climatic zone

Climatic Change, Год журнала: 2020, Номер 160(3), С. 427 - 442

Опубликована: Янв. 27, 2020

Язык: Английский

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Meteolakes: An operational online three-dimensional forecasting platform for lake hydrodynamics

Water Research, Год журнала: 2020, Номер 172, С. 115529 - 115529

Опубликована: Янв. 21, 2020

Environmental management depends on high-quality monitoring and its meaningful interpretation. The combination of local weather dynamics, regional anthropogenic stresses global environmental changes make the evaluation information in dynamic freshwater systems a challenging task. While lake ecosystems gather many complex biogeochemical interactions, they remain constrained by same physical environment mixing transport. It is therefore crucial to obtain system insight. Three-dimensional hydrodynamic models are perfectly suited for providing such information. However, these implement, their use often limited modellers. Here, we aim provide model output via user-friendly platform broad audience ranging from scientists public governmental stakeholders. We present unified approach merging apparently diverse interests through meteolakes.ch, an online openly disseminating observations three-dimensional numerical simulations near real-time with short-term forecasts data assimilation. Meteolakes scalable range devices, modular distributed, hence allowing expansion other regions hardware infrastructures. Since 2016, has continuously provided timely synoptic more than 250,000 users. This web-based was built not only guidance design analysis field experiments foster interdisciplinary studies, but also assist agencies professionals long-term policy planning water resources management. Finally, our aimed at promoting awareness understanding complexity lakes interfaces. article details operation products. Applications demonstrated examples recent upwelling storm event. Both cases illustrate how help quest process as well civil society specific warnings.

Язык: Английский

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Deterministic modelling of freshwater lakes and reservoirs: Current trends and recent progress

Environmental Modelling & Software, Год журнала: 2021, Номер 144, С. 105143 - 105143

Опубликована: Июль 16, 2021

Язык: Английский

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Anoxia decreases the magnitude of the carbon, nitrogen, and phosphorus sink in freshwaters

Global Change Biology, Год журнала: 2022, Номер 28(16), С. 4861 - 4881

Опубликована: Май 25, 2022

Oxygen availability is decreasing in many lakes and reservoirs worldwide, raising the urgency for understanding how anoxia (low oxygen) affects coupled biogeochemical cycling, which has major implications water quality, food webs, ecosystem functioning. Although increasing magnitude prevalence of been documented freshwaters globally, challenges disentangling oxygen temperature responses have hindered assessment effects on carbon, nitrogen, phosphorus concentrations, stoichiometry (chemical ratios), retention freshwaters. The consequences are likely severe may be irreversible, necessitating ecosystem-scale experimental investigation freshwater availability. To address this gap, we devised conducted REDOX (the Reservoir Ecosystem Dynamic Oxygenation eXperiment), an unprecedented, 7-year experiment manipulated modeled bottom-water (hypolimnetic) at whole-ecosystem scale a eutrophic reservoir. Seven years data reveal that significantly increased hypolimnetic concentrations altered elemental by factors 2-5× relative to oxic periods. Importantly, prolonged summer nitrogen export from reservoir six-fold changed net sink source organic carbon downstream. While low thought as response land use climate change, results demonstrate can also driver changes serve intensifying feedback increases downstream waterbodies. Consequently, change continue increase it will budgets well quality

Язык: Английский

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The impact of floating photovoltaic power plants on lake water temperature and stratification

Scientific Reports, Год журнала: 2023, Номер 13(1)

Опубликована: Май 16, 2023

Floating photovoltaics (FPV) refers to photovoltaic power plants anchored on water bodies with modules mounted floats. FPV represents a relatively new technology in Europe and is currently showing rapid growth deployment. However, effects thermal characteristics of lakes are largely unknown, yet these crucial for licensing approval such plants. Here, we quantify impacts lake temperature, energy budget stratification through measurements near-surface lateral wind flow, irradiance, air temperatures at one the largest commercial German facilities, situated 70 m deep dredging Upper Rhine Valley, South-West Germany. Underneath facility, 73% reduction irradiance surface an average 23% speed module height detected. A three month data set then used up General Lake Model simulate scenarios different occupancies changing climatic conditions. We observe that coverage result more unstable shorter during summer, which could mitigate climate change. The follows non-linear relationship increased occupancy. sensitivity analysis showed by can have considerable impact properties lake. only suggest small deviations regard investigated These findings be procedures allow accurate assessment environmental future installations.

Язык: Английский

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Past and future climate change effects on the thermal regime and oxygen solubility of four peri-alpine lakes

Hydrology and earth system sciences, Год журнала: 2023, Номер 27(3), С. 837 - 859

Опубликована: Фев. 16, 2023

Abstract. Long-term effects of climate change on lakes globally will include a substantial modification in the thermal regime and oxygen solubility lakes, resulting alteration ecosystem processes, habitats, concentrations critical substances. Recent efforts have led to development long-term model projections lake regimes solubility. However, such are hardly ever confronted with observations extending over multiple decades. Furthermore, global-scale forcing parameters models present several limitations, as need significant downscaling. In this study, were analyzed four largest French peri-alpine 1850–2100. We tested one-dimensional (1D) models' robustness for variations based up 63 years limnological data collected by Observatory LAkes (OLA). Here, we evaluate possibility mechanistic following evolution shortwave radiation air temperature while providing realistic seasonal trends other variables which local-scale downscaling often lacks accuracy. Based approach, MyLake, forced temperatures radiations, predicted accurately last 4 6 decades, RMSE < 1.95 ∘C. Over previous 3 water increased 0.46 ∘C per decade (±0.02 ∘C) epilimnion 0.33 (±0.06 hypolimnion. Concomitantly due change, O2 has decreased −0.104 mg L−1 (±0.005 L−1) −0.096 (±0.011 hypolimnion, respectively. shared socio-economic pathway SSP370 Intergovernmental Panel Climate Change (IPCC), could face an increase 3.80 (±0.20 next 70 years, accompanied decline 1.0 (±0.1 Together, these results highlight conditions coming better integration observatories anticipate habitats.

Язык: Английский

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Emergence of lake conditions that exceed natural temperature variability

Nature Geoscience, Год журнала: 2024, Номер 17(8), С. 763 - 769

Опубликована: Июль 12, 2024

Abstract Lake surface temperatures are projected to increase under climate change, which could trigger shifts in the future distribution of thermally sensitive aquatic species. Of particular concern for lake ecosystems when outside range natural variability, without analogue either today or past. However, our knowledge such no-analogue conditions will appear remains uncertain. Here, using daily outputs from a large ensemble SSP3-7.0 Earth system model projections, we show that these emerge at many northern lakes global warming 4.0 °C above pre-industrial conditions. No-analogue occur sooner, 2.4 warming, lower latitudes, primarily due weaker increases likelihood upper limit temperature being exceeded. Similar patterns also subsurface water, with occurring first low latitudes and last, if all, higher latitudes. Our study suggests induce changes across water column, particularly leading emergence unparalleled climates no modern counterparts, probably affecting their habitability rearrangements freshwater habitats this century.

Язык: Английский

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Ecosystem-scale nutrient cycling responses to increasing air temperatures vary with lake trophic state

Ecological Modelling, Год журнала: 2020, Номер 430, С. 109134 - 109134

Опубликована: Май 30, 2020

Язык: Английский

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Toward an open access to high-frequency lake modeling and statistics data for scientists and practitioners – the case of Swiss lakes using Simstrat v2.1

Geoscientific model development, Год журнала: 2019, Номер 12(9), С. 3955 - 3974

Опубликована: Сен. 6, 2019

Abstract. One-dimensional hydrodynamic models are nowadays widely recognized as key tools for lake studies. They offer the possibility to analyze processes at high frequency, here referring hourly timescales, investigate scenarios and test hypotheses. Yet, simulation outputs mainly used by modellers themselves often not easily reachable outside community. We have developed an open-access web-based platform visualization promotion of easy access model output data updated in near-real time (http://simstrat.eawag.ch, last access: 29 August 2019). This was 54 lakes Switzerland with potential adaptation other regions or global scale using appropriate forcing input data. The benefit this is practically illustrated two examples. First, we show that allows assessing long-term effects past climate change on thermal structure a lake. study confirms need only evaluate changes all atmospheric but also watershed throughflow heat energy light penetration assess structure. Then, how can be compare role episodic strong wind events different regional especially their temporarily destabilized. With platform, demonstrate new path forward scientists practitioners promoting cross exchange expertise through openly sharing situ

Язык: Английский

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Climate change and Northern Hemisphere lake and river ice phenology from 1931–2005

˜The œcryosphere, Год журнала: 2021, Номер 15(5), С. 2211 - 2234

Опубликована: Май 10, 2021

Abstract. At high latitudes and altitudes one of the main controls on hydrological biogeochemical processes is breakup freeze-up lake river ice. This study uses 3510 time series from across 678 Northern Hemisphere lakes rivers to explore historical patterns in ice phenology five overlapping periods (1931–1960, 1946–1975, 1961–1990, 1976–2005, 1931–2005). These show that number annual open-water days increased by 0.63 d per decade 1931–2005 Hemisphere, with trends for and, a lesser extent, closely correlating regionally averaged temperature. Breakup display spatiotemporally complex evolution reveal considerable caveats interpreting implications changes at sites may only have or data, rather than both. results provide an important contribution showing regional variation through can be hidden longer-term trends. The 30-year also evidence acceleration warming time. Understanding both long- short-term timescales will determining causes this change, underlying associated it, wider climatological significance as global temperatures rise.

Язык: Английский

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