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Titolo:
The surface UV-B irradiation in the Arctic: observations at the Polish polar station, Hornsund (77 degrees N, 15 degrees E), 1996-1997
Autore:
Krzyscin, JW; Sobolewski, PS;
Indirizzi:
Polish Acad Sci, Inst Geophys, PL-01452 Warsaw, Poland Polish Acad Sci Warsaw Poland PL-01452 Geophys, PL-01452 Warsaw, Poland
Titolo Testata:
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
fascicolo: 4, volume: 63, anno: 2001,
pagine: 321 - 329
SICI:
1364-6826(200103)63:4<321:TSUIIT>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANTARCTIC OZONE DEPLETION;
Keywords:
solar UV-B radiation; Arctic; data analyses; statistical models;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Krzyscin, JW Polish Acad Sci, Inst Geophys, Ks Janusza 64 St, PL-01452 Warsaw, Poland Polish Acad Sci Ks Janusza 64 St Warsaw Poland PL-01452 land
Citazione:
J.W. Krzyscin e P.S. Sobolewski, "The surface UV-B irradiation in the Arctic: observations at the Polish polar station, Hornsund (77 degrees N, 15 degrees E), 1996-1997", J ATMOS S-P, 63(4), 2001, pp. 321-329

Abstract

Measurements of the UV-B radiation reaching ground level at the Polish polar station, Hornsund (Svalbard, 77 degrees N, 15 degrees 30'E, 11 m a.s.l.), have been carried out since February 1996 by means of a temperature stabilized Robertson-Berger-type meter. The seasonal pattern of UV dose and UV index, and factors affecting the UV-B level there are studied for the periodMarch-October of 1996 and 1997. The quality of the UV measurements is assured by comparisons of the instrument readings with those calculated from a radiative transfer model under clear-sky conditions. A statistical method is proposed to examine the year-to-year drift of the instrument readings. The maximum value of UV daily dose and UV index are found in late spring of 10.2 MED (1 MED = 210 J(eff) m(-2)) and 2.5, respectively. The maximum UV irradiance at the midnight is congruent to4 mW(eff) m(-2). The seasonal pattern of UV daily dose appears to be asymmetric relative to the summer solstice. All-weather UV measurements taken in early spring provided much higher (congruent to 50%) UV irradiances than the corresponding measurements in late summer because of larger ground albedo and atmospheric transparency (due to smaller cloud/aerosol optical depth) in early spring. Depletion of totalozone is not the only source of the UV trend over Arctic. It is found thatlong-term (1965-1997) changes in the cloud cover over southern Svalbard had significant impact on the UV level there. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 02/04/20 alle ore 12:46:45