Výsledky vyhledávání - "T. C. Grenfell"

Akademický článek

The influence of snow grain size and impurities on the vertical profiles of actinic flux and associated NOx emissions on the Antarctic and Greenland ice sheets

Autor: M. C. Zatko, T. C. Grenfell, B. Alexander, S. J. Doherty, J. L. Thomas, X. Yang

Publikováno v: Atmospheric Chemistry and Physics, Vol 13, Iss 7, Pp 3547-3567 (2013)

We use observations of the absorption properties of black carbon and non-black carbon impurities in near-surface snow collected near the research stations at South Pole and Dome C, Antarctica, and Summit, Greenland, combined with a snowpack actinic f

Externí odkaz: https://doaj.org/article/1d5e720108fd4ec68c82f16b201a608e

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Akademický článek

Light-absorbing impurities in Arctic snow

Autor: S. J. Doherty, S. G. Warren, T. C. Grenfell, A. D. Clarke, R. E. Brandt

Publikováno v: Atmospheric Chemistry and Physics, Vol 10, Iss 23, Pp 11647-11680 (2010)

Absorption of radiation by ice is extremely weak at visible and near-ultraviolet wavelengths, so small amounts of light-absorbing impurities in snow can dominate the absorption of solar radiation at these wavelengths, reducing the albedo relative to

Externí odkaz: https://doaj.org/article/78cc0e0fb7f847008c1dfcab476a3be3

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The influence of snow grain size and impurities on the vertical profiles of actinic flux and associated NOx emissions on the Antarctic and Greenland ice sheets

Autor: M. C. Zatko, T. C. Grenfell, B. Alexander, S. J. Doherty, J. L. Thomas, X. Yang

We use observations of the absorption properties of black carbon and non-black-carbon impurities in near-surface snow collected near the research stations at South Pole and Dome C, Antarctica and Summit, Greenland combined with a snowpack actinic flu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4f5c3011eb8e3be5c5e3988e68c8e89d
https://doi.org/10.5194/acpd-12-15743-2012

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Sources of light-absorbing aerosol in arctic snow and their seasonal variation

Autor: D. A. Hegg, S. G. Warren, T. C. Grenfell, S. J. Doherty, A. D. Clarke

Two data sets consisting of measurements of light absorbing aerosols (LAA) in arctic snow together with suites of other corresponding chemical constituents are presented; the first from Siberia, Greenland and near the North Pole obtained in 2008, and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1e9c57ba6a0741c78a478d940a5ad83a
https://doi.org/10.5194/acpd-10-13755-2010

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A method for the detection of the severe rain-on-snow event on Banks Island, October 2003, using passive microwave remote sensing

Autor: T. C. Grenfell, J. Putkonen

Publikováno v: Water Resources Research. 44

[1] Severe wintertime rain-on-snow (ROS) events create a strong ice layer (or layers) in the snow on arctic tundra that act as a barrier to ungulate grazing. They are linked with large-scale ungulate (reindeer, caribou, elk, and musk-ox) herd decline

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65adf0f01c431f3f79be34e0540e06d8
https://doi.org/10.1029/2007wr005929

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A Visible and Near-Infrared Scanning Photometer for Field Measurements of Spectral Albedo and Irradiance under Polar Conditions

Autor: T. C. Grenfell

Publikováno v: Journal of Glaciology. 27:476-481

The design and operating characteristics are presented for a visible and near-infrared scanning photometer which can measure incident and reflected spectral irradiance from 400 nm to 2 450 nm. The instrument is designed to record over 98% of the sola

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b4de33bef4989134f8dfd1e73baac3c4
https://doi.org/10.3189/s0022143000011503

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