منابع مشابه
The Meteorological Aspects of Ice Cover on the Great Lakes*
The formation and break-up of ice on the Great Lakes as observed by regular ice reconnaissance flights conducted by the Meteorological Service of Canada is discussed in terms of the meteorological parameters involved. Ice cover on the individual lakes over the past four years is correlated with the winter temperature regime and an index of the heat stored in each lake using the concept of cumul...
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Boreal lakes can be ice covered for a substantial portion of the year at which time methane (CH4) can accumulate below ice. The amount of CH4 emitted at ice melt is partially determined by the interplay between CH4 production and CH4 oxidation, performed by methane-oxidizing bacteria (MOB). Yet the balance between oxidation and emission and the potential for CH4 oxidation in various lakes durin...
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The magnitude and variability in methane (CH4) emissions from lakes are uncertain due to limitations in methods for quantifying the patchiness of ebullition (bubbling). We present a field method to estimate an important and highly uncertain source: ebullition from northern lakes. We defined four classes of CH4 bubble clusters trapped in lake ice representing distinct types of biogenic ebullitio...
متن کاملMonitoring of ice growth on the East channel and on shallow lakes in the Mackenzie Delta
The global warming has a substantial impact on the local geomorphological system of the arctic environment. Earth observation data has the capacity to provide accurate high resolution information. Due to the all-weather and day and night observation capability Synthetic Aperture Radars (SAR) are particularly well suited for the mapping and monitoring of arctic and isolated environments. This pa...
متن کاملSatellite SAR Remote Sensing of Great Lakes Ice Cover, Part 2. Ice Classification and Mapping
During the 1997 winter season, shipborne polarimetric backscatter measurements of Great Lakes (freshwater) ice types using the Jet Propulsion Laboratory C-band scatterometer, together with surface-based ice physical characterization measurements and environmental parameters, were acquired concurrently with Earth Resource Satellite 2 (ERS-2) and RADARSAT Synthetic Aperture Radar (SAR) data. This...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1958
ISSN: 0022-1430,1727-5652
DOI: 10.1017/s0022143000024345