Sentences with phrase «density measurement network»
To ascertain the annual balance of a glacier from a sparse network of observations is optimized by detailed mapping of mass balance across the glacier determined from a high - density measurement network during several years.
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The highest density network is probably the highest measurement density ever used in mass balance observations.
On Columbia Glacier, we used a measurement network with a maximum density of 375 points / km2, and a maximum spacing between points of 90 m and a mean spacing of 45 m. Annual mass balance (1984 - 1998) was typically determined on Columbia Glacier from a measurement network with a spacing of 187 points / km2 (Pelto, 1996), and a mean spacing of 50 m.
On Columbia Glacier in the North Cascades, Washington and Lemon Creek Glacier Juneau Icefield, Alaska, we determined annual mass balance from measurement networks of varying density.
The lowest density network was 1 point / km2 on Lemon Creek Glacier and 10 points / km2on Columbia Glacier > The highest density of measurements was 30 points / km2 on Lemon Creek Glacier and 375 points / km2 on Columbia Glacier.
In this study, we approach the issue of errors resulting from measurements networks of varying densities from a purely field measurement perspective.
On Lemon Creek Glacier we used a measurement network with a maximum density of 30 points / km2.
The use of a high measurement density and consistent methods provides that errors resulting from an imperfectly representative measurement network are largely consistent and correctable (Pelto, 1996, 1997, 2000).