Lakes high-latitude

Lockhart WL, Wilkinson P, BiUeck BN, Hunt RV, Wagemann R, Brunskill GJ. 1995. Current and historical inputs of mercury to high-latitude lakes in Canada and to Hudson Bay. Water, Air Soil Pollut 80(1 ) 603-610. 

Canada has about 36 per cent of the world peat area, and at least 50 per cent of the lake surfaces within the Boreal and Arctic biomes. If the figures of Table I are weighted with these areas, on the assumption that conditions have been similar in Eurasia it can be estimated that world post-glacial carbon accumulation in high latitude bogs, peats, soils and lakes may have been close to 500 Gt, equivalent to 70 per cent of present atmospheric storage. Present annual rates of withdrawal may be close to 80 X 10 t a ( 0.1 Gt per annum). 

Priscu, J. C. (1989). Photon dependence of inorganic nitrogen transport by phytoplankton in perennialy ice-covered Antarctic lakes. In High Latitude Limnology (Vincent, W. F., and Elhs-Evans, J. C., eds.). Hydrobiologia 172, 173—182. 

Figure 8. Lake data computed from Vincent et al. [68] to show the power relationship between K 2q w32o) DOC concentration for a range of high latitude lakes. The...

Land cover in lake watersheds, climate, and hydraulic residence time influence the spatial pattern of DOC quality. Data from Laurion et al. [62] show that lakes with high-elevation watersheds had lower DOC concentrations than those at lower elevations in the same region. Lakes at similar elevations had lower DOC-specific attenuation if the watershed was rocky compared to watersheds with meadow or forested land cover. These data also showed that, for lake watersheds with similar land cover, DOC-specific attenuation was elevated when catchment area was more than 50 times larger than lake area, a characteristic associated with short residence times. For all the lake surveys in Table 2 and the majority in Table 3 the power equation exponent is greater than 1. These cover mountain lakes and wet areas at mid to high latitudes. The exceptions, where DOC-specific absorption varies inversely with DOC concentration, include ponds and lakes in the arid prairies of central Canada. 

I. Laurion, W.F. Vincent, D.R.S. Lean (1997). Underwater Ultraviolet radiation development of spectral models for northern high latitude lakes. Photochem. Photo-biol., 65,107-114. 

Fig. 3 Comparison of historical profiles of SCCPs in dated sediment cores from Lakes Thun (Switzerland) [46], Ontario (OntlOOV and Ontl034) [39], other Canadian lakes [41], and DV09 a high latitude lake in the Canadian arctic [42]. Results are normafized to the maximum concentration reported to allow comparison. Profiles are compared to North American and European production of SCCPs (tons/year) estimated in Muir et al. [47]...

Fig. 4.9 The Cassini spacecraft, using its radar system, has discovered very strong evidence for hydrocarbon lakes on Titan. Dark patches, which resemble terrestrial lakes, seem to be sprinkled all over the high latitudes surrounding Titan s north pole. NASA/JPL/Space Science Institute...

Methane Bubble Inclusions in Ice on High Latitude Lakes... 

Phelps, A.R., K.M. Peterson, and M.O. Jeffries, Methane efflux from high latitude lakes during spring ice-melt, J. Geophys. Res. - Atmospheres, In press. 

B. There have been decreases of c. 10 % in the extent and duration of lake ice cover in the mid- and high-latitudes of the northern hemisphere during the 1990s. 

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