The role of climate and lake size in regulating the ice phenology of boreal lakes

2021 ◽  
Author(s):  
S. N. Higgins ◽  
C. Desjardins ◽  
H. Drouin ◽  
L. Hrenchuk ◽  
J.J. van der Sanden
Keyword(s):  
Boreal Lakes ◽  
Lake Size ◽  
Ice Phenology

scholarly journals The role of snow and ice thickness on river ice process in Songhua River basin, Northeast China

2019 ◽  
Author(s):  
Qian Yang ◽  
Kaishan Song ◽  
Xiaohua Hao ◽  
Zhidan Wen ◽  
Yue Tan ◽  
...  
Keyword(s):  
River Basin ◽  
Air Temperature ◽  
Snow Depth ◽  
Northeast China ◽  
River Ice ◽  
Ice Thickness ◽  
Songhua River ◽  
Songhua River Basin ◽  
Ice Phenology

Abstract. Songhua River basin is a sensitive area to global warming in Northeast China that could be indicated by changes in lake and river ice development. The regional role and trends of ice characteristics of this area have been scarcely investigated, which are critical for aquatic ecosystem, climate variability, and human activities. Based on the ice record of hydrological stations, we examined the spatial variations of the ice phenology and ice thickness in Songhua River basin in Northeast China from 2010 to 2015 and explored the role of ice thickness, snow during ice-on and ice-off process. All five river ice phenology including freeze-up start, freeze-up end, break-up start, break-up end and complete frozen duration showed latitudinal distribution and a changing direction from southeast to northwest, and five typically geographic zones were identified based on rotated empirical orthogonal function. Maximum ice thickness had a higher correlation with five parameters than that of average snow depth and air temperature on bank. A linear regression function was established between ice thickness and snow depth on ice and indicated ice thickness was closely associated with snow depth on ice. The air temperature had higher correlation with ice phenology and influenced the lake ice phenology significantly, and snow cover did not show significant correlation with the ice phenology. However, snow cover correlated with ice thickness significantly and positively during the periods when the freshwater is completely frozen.

scholarly journals Fish community size structure of small lakes: the role of lake size, biodiversity and disturbance

2015 ◽  
Vol 30 (4) ◽  
pp. 557-568 ◽  
Author(s):  
Thomas A. Clement ◽  
Brent A. Murry ◽  
Donald G. Uzarski
Keyword(s):  
Fish Community ◽  
Size Structure ◽  
Small Lakes ◽  
Community Size ◽  
Lake Size

Blowin’ in the wind: reciprocal airborne carbon fluxes between lakes and land This paper is based on the J.C. Stevenson Memorial Lecture presented at the Canadian Conference for Fisheries Research (CCFFR) in Ottawa, Ontario, 9–11 January 2009.

2011 ◽  
Vol 68 (1) ◽  
pp. 170-182 ◽  
Author(s):  
M. Jake Vander Zanden ◽  
Claudio Gratton
Keyword(s):  
Carbon Flux ◽  
Open Water ◽  
Memorial Lecture ◽  
Published Data ◽  
Insect Emergence ◽  
Large Lakes ◽  
Lake Ecosystems ◽  
Ecosystem Size ◽  
Lake Size

Ecologists are increasingly interested in how disjunct habitats are connected through the cross-habitat movement of matter, prey, nutrients, and detritus and the implications for recipient systems. The study of lake ecosystems has been dominated by the study of pelagic (open-water) production and processes, though there is growing awareness of the role of terrestrial inputs and benthic trophic pathways. Here, we review the phenomena of airborne fluxes to and from lakes. We assemble published data on terrestrial particulate organic carbon (TPOC) deposition to lakes, insect production, and insect emergence and use these data to simulate how airborne lake-to-land and land-to-lake carbon flux is expected to scale with ecosystem size, while taking into account among-lake variability in emergence and TPOC deposition. Emergent insect flux to land increases as a function of lake size, while TPOC deposition to lakes decreases as a function of lake size. TPOC deposition exceeds insect emergence in small lakes, while in large lakes, insect emergence exceeds TPOC deposition. We present a general framework for considering directional fluxes across habitat boundaries. Furthermore, our results highlight the overarching role of ecosystem geometry in determining insect emergence, airborne carbon deposition, and net carbon flux between adjacent ecosystems.

The Role of Northern Lakes in a Regional Energy Balance

2005 ◽  
Vol 6 (3) ◽  
pp. 291-305 ◽  
Author(s):  
Wayne R. Rouse ◽  
Claire J. Oswald ◽  
Jacqueline Binyamin ◽  
Christopher Spence ◽  
William M. Schertzer ◽  
...  
Keyword(s):  
Surface Energy ◽  
Heat Storage ◽  
Regional Climate ◽  
Heat Fluxes ◽  
Net Radiation ◽  
Large Lakes ◽  
Regional Energy ◽  
Energy Balances ◽  
Lake Size

Abstract There are many lakes of widely varying morphometry in northern latitudes. For this study region, in the central Mackenzie River valley of western Canada, lakes make up 37% of the landscape. The nonlake components of the landscape are divided into uplands (55%) and wetlands (8%). With such abundance, lakes are important features that can influence the regional climate. This paper examines the role of lakes in the regional surface energy and water balance and evaluates the links to the frequency–size distribution of lakes. The primary purpose is to examine how the surface energy balance may influence regional climate and weather. Lakes are characterized by both the magnitude and temporal behavior of their surface energy balances during the ice-free period. The impacts of combinations of various-size lakes and land–lake distributions on regional energy balances and evaporation cycles are presented. Net radiation is substantially greater over all water-dominated surfaces compared with uplands. The seasonal heat storage increases with lake size. Medium and large lakes are slow to warm in summer. Their large cumulative heat storage, near summer’s end, fuels large convective heat fluxes in fall and early winter. The evaporation season for upland, wetland, and small, medium, and large lakes lasts for 19, 21, 22, 24, and 30 weeks, respectively. The regional effects of combinations of surface types are derived. The region is initially treated as comprising uplands only. The influences of wetland, small, medium, and large lakes are added sequentially, to build up to the energy budget of the actual landscape. The addition of lakes increases the regional net radiation, the maximum regional subsurface heat storage, and evaporation substantially. Evaporation decreases slightly in the first half of the season but experiences a large enhancement in the second half. The sensible heat flux is reduced substantially in the first half of the season, but changes little in the second half. For energy budget modeling the representation of lake size is important. Net radiation is fairly independent of size. An equal area of medium and large lakes, compared with small lakes, yields substantially larger latent heat fluxes and lesser sensible heat fluxes. Lake size also creates large differences in regional flux magnitudes, especially in the spring and fall periods.

scholarly journals The role of lake size and local phenomena for monitoring ground-fast lake ice

2018 ◽  
Vol 40 (3) ◽  
pp. 832-858 ◽  
Author(s):  
Georg Pointner ◽  
Annett Bartsch ◽  
Bruce C. Forbes ◽  
Timo Kumpula
Keyword(s):  
Lake Ice ◽  
Lake Size

scholarly journals Varve Distribution Reveals Spatiotemporal Hypolimnetic Hypoxia Oscillations During the Past 200 Years in Lake Lehmilampi, Eastern Finland

Quaternary ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 20 ◽  
Author(s):  
Sarianna Salminen ◽  
Saija Saarni ◽  
Mira Tammelin ◽  
Yu Fukumoto ◽  
Timo Saarinen
Keyword(s):  
Climatic Factors ◽  
Sediment Cores ◽  
Boreal Lakes ◽  
Water Volume ◽  
Spatiotemporal Variations ◽  
The Past ◽  
Hypoxic Water ◽  
The Relationship ◽  
Eastern Finland

We investigated 34 sediment cores to reconstruct spatiotemporal variations in hypolimnetic hypoxia for the past 200 years in Lehmilampi, a small lake in Eastern Finland. As hypoxia is essential for varve preservation, spatiotemporal changes in varve distribution were used as an indicator for hypolimnetic hypoxia oscillations. The hypoxic water volume was used as a variable reflecting hypolimnetic hypoxia and determined for each year by estimating the water volume beneath the water depth where shallowest varves were preserved. As a result, seven hypoxia periods, highlighting the variations in hypolimnetic hypoxia, are established. These periods may be influenced by bioturbation, lake infill, and lake level changes. Furthermore, we evaluated the relationship between hypolimnetic hypoxia oscillations and climatic factors. Diatom assemblage changes were also analyzed to estimate whether the hypoxia periods could be related to anthropogenic eutrophication. The diatom analyses suggest relatively stable nutrient conditions for the past 200 years in Lake Lehmilampi. Climate, on the other hand, seems to be an important driver of hypoxia oscillations based on correlation analysis. The role of individual forcing factors and their interaction with hypolimnetic hypoxia would benefit from further investigations. Understanding climatic and anthropogenic forcing behind hypolimnetic hypoxia oscillations is essential when assessing the fate of boreal lakes in a multi-stressor world.

scholarly journals The role of photomineralization for CO 2 emissions in boreal lakes along a gradient of dissolved organic matter

2020 ◽  
Author(s):  
Lina Allesson ◽  
Birgit Koehler ◽  
Jan‐Erik Thrane ◽  
Tom Andersen ◽  
Dag O. Hessen
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Boreal Lakes
Sign in / Sign up

Export Citation Format

Share Document