Physicochemical Limnology of Meromictic Saline Lake Sophia, Canadian Arctic Archipelago

Ouellet, Marcel; Bisson, M.; Pagé, P.; Dickman, Mike

doi:10.2307/1551366

Cited by 13 publications

(13 citation statements)

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“…Unfortunately, the data presented here do not clarify the problem of the origin of the strongly hypersaline monimolimnia in Lakes Sophia, Garrow Stewart & Platford, 1986;Stewart, 1987;Pag6 et al, 1987;Welch, 1991) or Romulus (Davidge, 1994). However, they clearly suggest that geography and local climate were important determinants.…”

Section: Variations In Maximum Specific Conductancecontrasting

confidence: 60%

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The comparative limnology of high arctic, coastal, meromictic lakes

Ludlam

1996

J Paleolimnol

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Five important features appear in rough order from the surface downwards in physical and chemical profiles from high arctic coastal meromictic lakes. These features are: (1) a supersaturated oxygen maximum, (2) the center of the oxycline, (3) a thermal maximum, (4) a major absorption maximum, and (5) an anoxic stratum. The depth of the absorption maxima and the top of the anoxic strata are both statistically correlated to light penetration and to each other. The depth of the thermal maximum also shows a statistical correlation to light penetration among lakes with a relatively shallow chemocline. The temperature of the thermal maximum appears to be maintained by inputs of light energy while the oxygen maximum is maintained to a large extent by photosynthesis. Thus, these major features are all influenced by light penetration. With the exception of the supersaturated oxygen maximum, all of the above features are dependent for their existence upon the primary chemocline stabilizing the water column. Apparently, in at least some lakes, a near surface secondary chemocline or cool (ca. 4 ~ secondary inverse thermocline will enhance the stability of the water column above the primary chemocline sufficiently to allow a supersaturated oxygen maximum to develop in this region. However, the supersaturated oxygen maximum can extend into the primary chemocline, and in highly transparent Sophia Lake (Cornwallis Island, N.W.T.) this feature extends below the primary chemocline.Where the chemocline is found below depths with adequate illumination, features other than the supersaturated oxygen maximum should be found in deeper water as well, or they should be eliminated from the profiles. Thus, where the chemocline is relatively shallow, the depth of features like the thermal maximum or anoxic strata are related most closely to light penetration, but where chemoclines are deep, as in Lake Tuborg (Ellesmere Island, N.W.T.), the depth of the chemocline determines the depth of the oxycline, thermal maximum, absorption maximum and anoxic stratum.

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Section: Variations In Maximum Specific Conductancecontrasting

confidence: 60%

“…Sophia and Garrow Lakes were also very transparent (Stewart & Platford, 1986), although a bacterial plate existed in Garrow Lake at the base of the oxycline where sulfide was also detected . Considerable disagreement on the origin of the hypersaline monimolimnia remains (Ouellet & Pag6, 1987;Stewart, 1987).…”

Section: Introductionmentioning

confidence: 99%

The comparative limnology of high arctic, coastal, meromictic lakes

Ludlam

1996

J Paleolimnol

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“…2), 60 km northeast of Resolute Bay, where there is a 50-yr-long climate record (Atmospheric Environment Service, 1984). The lake is deep, hypersaline and meromictic, and · contains anoxic bottom waters (Ouellet et al, 1987) with thinly laminated bottom sediments. The lake's major inlet is the snowmelt-fed "Sophia River" (unofficial name), with a watershed area of about 40 km 2 and an elevation range of 4 to 235 m a.s.l.…”

Section: Lake Sophia and The Sophia River Watershedmentioning

confidence: 99%

Streamflow and Suspended Sediment Transfer to Lake Sophia, Cornwallis Island, Nunavut, Canada

Braun

Hardy

Bradley

et al. 2000

Arctic, Antarctic, and Alpine Research

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To ascertain the climatic controls on sediment transport to Lake Sophia, Comwallis Island, Nunavut, Canada, we made detailed hydrological and meteorological measurements in the Sophia River watershed through the 1994 melt season. Streamflow and suspended sediment transport are limited, on an annual time scale, by the supply of snow and sediment in the watershed. Suspended sediment yield from the watershed was only 0.46 t k:m-2 , which is lower than any previously published yield for a stream in the High Arctic. Snowmelt rgnoff accounted for 88% of the annual suspended sediment load, whereas 6 and 9% were transported in response to a slushflow event and summer rainfall, respectively. These measurements provide no direct evidence that modem-day sediment delivery to Lake Sophia is related to fluctuations in air temperature, which has implications for the paleoenvironmental signal preserved in Lake Sophia's laminated sediments. We suggest that on-site sediment transport studies are necessary to establish the relationships among geology, geography, climate, and hydrology unique to each watershed-lake system and need to be an integral part of any calibration attempt. Additional years of data are needed however to define the interannual variability of streamflow and sediment transport in response to climate.

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“…etal., 1984(Page. etal., , 1987Ouellet et al, 1987Ouellet et al, , 1989 are known from Greenland. In all cases, areas where saline lakes occur are cold deserts (low and high Arctic continental regimes) with low air temperatures for most or all of the year, only slight annual precipitation, and excessive annual evaporation (Fristrup, 1975). A tundra climate prevails according to the Koppen climatic scheme.…”

Section: Distribution and Climatementioning

confidence: 99%