Snow and vegetation sampling in northern Québec

The project was conducted under the umbrella of the "Variability and Change in the Canadian Cryosphere" network. A latitudinal transect study was conducted northern Québec, Eastern Canada in February 2008. Gridded sampling of snow (thickness, snow water equivalent (SWE), density, grain size, morphology, temperature) and vegetation properties (tree height, density, DBH) was conducted in three areas (8 x 14 km) of boreal forest, taïga and tundra. Similar sampling also occurred along a north-south helicopter transect with a spatial sampling resolution of 40 km from 50 to 58 N and -66 to -71 W encompassing the gridded areas. Coincident airborne passive microwave brightness temperatures were measured at 19 and 37 GHz in both vertical and horizontal polarizations both along the transect and at the three sites. On the ground, two methods were developed to calculate snow specific surface area (SSA). The first method makes use of an infrared digital camera which measures the reflectance between 823 and 1000 nm. The reflectance is converted into SSA using the calibration curve established at SLF, Davos. The second method uses a 1.3 nm laser diode mounted on an integrating sphere, which also allows the measurement of the reflectance in the infrared region. Both methods are related and allow the calculation of snow SSA, which is expected to provide great improvement for microwave emission modeling.

Metadata Access
Creator Goïta, Kalifa;Langlois, Alexandre;Royer, Alain
Publisher Canadian Cryospheric Information Network
Contributor Université de Sherbrooke
Publication Year 2015
Rights Limited
Language English
Discipline Environmental Research
Spatial Coverage (50N-58N,71W-66W)
Temporal Coverage Begin 2008-02-10T11:59:59Z
Temporal Coverage End 2008-02-29T11:59:59Z