Open AccessESTUDIO DE LA INFLUENCIA DE LAS NUBES SOBRE LA RADIACIÓN UV EN LA CIUDAD DE RÍO GALLEGOS, ARGENTINA. STUDY OF THE CLOUD INFLUENCE ON THE UV RADIATION IN RIO GALLEGOS, ARGENTINA
Author(s) -
Facundo Orte,
Elián Wolfram,
Jacobo Salvador,
Raul Luis D'elia,
C. Marinelli,
E. J. Quel
Publication year - 2010
Publication title -
anales/anales afa
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.14
H-Index - 2
eISSN - 1850-1168
pISSN - 0327-358X
DOI - 10.31527/analesafa.2010.21.266
Subject(s) - ozone , atmospheric sciences , ozone depletion , latitude , environmental science , ozone layer , stratosphere , geology , meteorology , physics , geodesy
The ozone layer is regarded as an invisible filter that protects all life from the dangerous overexposure to ultraviolet rays.The thinning of the ozone layer over the South Pole stratosphere of our planet is a seasonal phenomenon that takes place everyyear during the spring since the 80s and is known as the “ozone hole”. It is developed on the Antarctic, reaching an area of 30million square kilometers approximately. In the spring begins to deform reached lower latitudes, presenting specific cases of lowtotal ozone column over Rio Gallegos (51 ° 36 'S, 69 º 19' W) due to the passage of the hole and its border over this city, whichcan derive in UV indices greater increasing the UV radiation impact on surface.This study evaluates the statistical dependence of the UV index with total ozone column and cloud optical thickness in thePatagonian city of Rio Gallegos for spring and summer. Another aim is to quantify the attenuation of UV radiation produced forthe clouds to cases that the ozone hole is passing over the city. The cloud optical thickness and UV index data analyzed wereobtained at Station CEILAP RG (CITEFA-CONICET) with a narrowband multichannel radiometer GUV-541 (BiosphericalInc.), and the total ozone column data were extracted from the Satellite OMI / AURA database of NASA. All these belong to thespring and summer seasons of the October 2005-December 2008 period. It is noted that 25% of ozone hole cases in springtime,which would result in a high UVI on Rio Gallegos, are strongly attenuated by the clouds.