scholarly journals Thermal sensitivity and the development of tundra ponds and thermokarst lakes in the Manitoba portion of the Hudson Bay lowland

1979 ◽  
Author(s):  
L A Dredge ◽  
F M Nixon
Keyword(s):  
Thermal Sensitivity ◽  
Hudson Bay ◽  
Thermokarst Lakes ◽  
Hudson Bay Lowland ◽  
Tundra Ponds

MACROFOSSIL AND BIOMARKER RECORD FROM HUDSON BAY LOWLAND SOUTH RIDGE HOLLOW BOG, NORTHEAST ONTARIO

2016 ◽  
Author(s):  
Rebecca Snyder ◽  
◽  
Dorothy Peteet ◽  
Jonathan Nichols ◽  
Sarah Finkelstein ◽  
...  
Keyword(s):  
Hudson Bay ◽  
Hudson Bay Lowland

scholarly journals Structural Characterization of Dissolved Organic Matter in Permafrost Peatland Lakes

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3059
Author(s):  
Diogo Folhas ◽  
Armando C. Duarte ◽  
Martin Pilote ◽  
Warwick F. Vincent ◽  
Pedro Freitas ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Complex Mixture ◽  
Resonance Spectroscopy ◽  
Hudson Bay ◽  
Microbial Decomposition ◽  
Thermokarst Lakes ◽  
Geochemical Properties ◽  
High Concentrations ◽  
Analytical Approaches

Thermokarst lakes result from the thawing of ice-rich permafrost and are widespread across northern landscapes. These waters are strong emitters of methane, especially in permafrost peatland regions, where they are stained black by high concentrations of dissolved organic matter (DOM). In the present study, we aimed to structurally characterize the DOM from a set of peatland thermokarst lakes that are known to be intense sites of microbial decomposition and methane emission. Samples were collected at different depths from three thermokarst lakes in the Sasapimakwananisikw (SAS) River valley near the eastern Hudson Bay community of Kuujjuarapik–Whapmagoostui (Nunavik, Canada). Samples were analyzed by spectrofluorometry, Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), and elemental analysis. Fluorescence analyses indicated considerable amounts of autochthonous DOM in the surface waters of one of SAS 1A, indicating a strong bioavailability of labile DOM, and consequently a greater methanogenic potential. The three lakes differed in their chemical composition and diversity, suggesting various DOM transformations phenomena. The usefulness of complementary analytical approaches to characterize the complex mixture of DOM in permafrost peatland waters cannot be overlooked, representing a first step towards greater comprehension of the organic geochemical properties of these permafrost-derived systems.

Analysis of Multi-Temporal ERS-1 SAR Data of Subarctic Tundra and Forest in the Northern Hudson Bay Lowland and Implications for Climate Studies

1999 ◽  
Vol 25 (1) ◽  
pp. 21-33 ◽  
Author(s):  
C.K. Duguay ◽  
W.R. Rouse ◽  
P.M. Lafleur ◽  
L.D. Boudreau ◽  
Y. Crevier ◽  
...  
Keyword(s):  
Hudson Bay ◽  
Multi Temporal ◽  
Hudson Bay Lowland ◽  
Sar Data ◽  
Climate Studies

Succession in the Hudson Bay Lowland, Northern Ontario, Canada

1996 ◽  
Vol 28 (2) ◽  
pp. 172 ◽  
Author(s):  
Lee F. Klinger ◽  
Susan K. Short
Keyword(s):  
Hudson Bay ◽  
Northern Ontario ◽  
Hudson Bay Lowland
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