Physical and Chemical Limnology of a Subsaline Athalassic Lake in West Greenland

Willemse, Nicolaas W.; Dam, O. van; Helvoort, Pieter-Jan van; Dankers, Rutger; Brommer, Marit; Schokker, Jeroen; Valstar, Tessa E.; Wolf, Hein de

doi:10.1023/b:hydr.0000036132.96154.01

Cited by 20 publications

(17 citation statements)

References 40 publications

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“…The warming of the fresh lens under the ice was likely the result of sunlight penetrating through the ice and heat transported by the freshet inflow. Temperatures of 5-7uC under the ice were also seen in 2006 and 2007; a similar effect was also observed in Store Saltsø, Greenland, by Willemse et al (2004). During this time, water below the fresh lens (.3 m), began to warm slowly, reaching ,1.5uC at the time of iceoff.…”

Section: Resultssupporting

confidence: 66%

Effect of salt exclusion from lake ice on seasonal circulation

Pieters

Lawrence

2009

Limnology & Oceanography

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We describe the circulation of Tailings Lake, located 220 km north of Yellowknife, Northwest Territories, Canada. From Jul 2004 to Sep 2007, temperature and conductivity profiles were collected together with data from three moored temperature chains and a meteorological station. The salt content of the lake was elevated (salinity 1 g L 21 ) relative to surrounding natural waters (,0.1 g L 21 ). Winter ice cover included 60-80 cm of transparent ''black'' ice, which excluded up to 99% of the salt from the water as the ice formed. During winter, the salt excluded from the ice was mixed throughout the water column under the ice. In spring, ice melt and snow runoff resulted in a freshwater cap; the density contrast between this fresh epilimnion and the more saline hypolimnion was sufficient to inhibit spring turnover. In summer, the epilimnion was deepened by storms, mixing anoxic water from the hypolimnion into the surface layer. Because spring turnover was suppressed, oxygen replenishment of the hypolimnion occurred only in fall. Although Tailings Lake has been subject to numerous anthropogenic changes, similar effects can be expected in other natural and manmade water bodies with elevated salinity and significant ice cover.

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Section: Resultssupporting

confidence: 66%

Effect of salt exclusion from lake ice on seasonal circulation

Pieters

Lawrence

2009

Limnology & Oceanography

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“…The Kangerlussuaq region is characterized by continuous permafrost, a low Arctic continental climate, and about 160 mm yr -1 of precipitation (Anderson et al, 2001(Anderson et al, , 2009Willemse et al, 2004;Aebly and Fritz, 2009). The region is located in the rain shadow of the Sukkertoppen Ridge of the Greenland Ice Sheet, which blocks the southwesterly winds that would otherwise bring higher rainfall to the region (Ohmura and Reeh, 1991).…”

Section: Field Areamentioning

confidence: 99%

Ground-Level Concentrations of Atmospheric Methane in Southwest Greenland Evaluated Using Open-Path Laser Spectroscopy and Cavity-Enhanced Absorption Spectroscopy

Webster

White

Pratt

2015

Arctic, Antarctic, and Alpine Research

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“…A significant majority of lakes in Greenland, the Arctic and Antarctic, including along glacial fringes, are composed of freshwater (Douglas and Smol, 1994;Rü hland and Smol, 1998;Anderson et al, 2001;Hamilton et al, 2001;Lim et al, 2001Lim et al, , 2005Michelutti et al, 2002;Lim and Douglas, 2003;Keatley et al, 2007;Kumke et al, 2007). The few instances of saline lakes found near glacial margins (in the McMurdo dry valleys of Antarctica and in Greenland) have salinity derived from multiple processes including marine aerosols, glacial and chemical weathering, ancient marine waters and evaporation, and are not limited to cryogenic concentration (Anderson et al, 2001;Willemse et al, 2004;Lyons et al, 2005). Finally, in continental shelf regions where proglacial lakes formed during the last glacial advance, freshwater aquifers are found in disequilibrium with overlying ocean water (Vaikmäe et al, 2001;Person et al, 2006).…”

Section: Shield Brines -Surficial Freezing Derived?mentioning

confidence: 99%