Enjoying Auroras during a Subarctic Winter in Canada
نویسندگان
چکیده
منابع مشابه
Human exposure to soil contaminants in subarctic Ontario, Canada
BACKGROUND Chemical contaminants in the Canadian subarctic present a health risk with exposures primarily occurring via the food consumption. OBJECTIVE Characterization of soil contaminants is needed in northern Canada due to increased gardening and agricultural food security initiatives and the presence of known point sources of pollution. DESIGN A field study was conducted in the western ...
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We studied a small subarctic lake to assess the magnitude of winter respiration and the organic carbon (OC) source for this respiration. The concentration and stable isotopic composition (d13C) of dissolved inorganic carbon (DIC) accumulating in the lake water under ice was analyzed over one winter (7 months). The DIC concentration increased and the d13C of DIC decreased over time, with the gre...
متن کاملPredator-prey Interactions between Eagles and Cackling Canada and Ross' Geese during Winter in California
-Cackling Geese (Brunta canadensis minima) were preyed on heavily in northeastern California by Golden Eagles (Aquila chysaetos) and less commonly by Bald Eagles (Haliaeetus Zeucocephalus) in 19851990. Eagle predation on Cackling Geese was minimal in other wintering locations in California. In the Klamath Basin, eagles killed Cackling Geese most frequently soon (<IO days) after the geese arrive...
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[1] We present the first images of Saturn’s conjugate equinoctial auroras, obtained in early 2009 using the Hubble Space Telescope. We show that the radius of the northern auroral oval is 1.5 smaller than the southern, indicating that Saturn’s polar ionospheric magnetic field, measured for the first time in the ionosphere, is 17% larger in the north than the south. Despite this, the total emitt...
متن کاملInferences concerning Auroras.
shown in the seventh column of the table is little affected by differences in the limiting brightness. This divergence indicates that, as compared with both Kapteyn and Mount Wilson, their results are not homogeneous; and noting, further, that the numerous and careful guages of the Herschels which extend to the 14th magnitude give a galactic condensation agreeing closely with Kapteyn (Herschel ...
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ژورنال
عنوان ژورنال: TRENDS IN THE SCIENCES
سال: 2002
ISSN: 1884-7080,1342-3363
DOI: 10.5363/tits.7.2_53