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Abstract:

The UVR-PAR Argentinean Monitoring Network started its operation in September 1994 recording ultraviolet (UVR) and Photosynthetic Available Radiation (PAR) at a frequency of once per minute, at four sites, throughout the entire year. Four spectroradiometers (GUV-511, Biospherical Instruments, Inc.) were installed at research centers separated by about 8-12 degrees of latitude, extending from the Subantarctic-Fueguian region to the Tropic of Capricorn. The instruments are located in populated areas ranging from 30.000 to 11 million people and with extremely different climate regimes and conditions of tropospheric pollution. Our ground-based data indicated that the irradiance increased steadily from south to north. This increase was also observed in the calculated daily doses of UV-B (280-320 nm); however, daily integrated values for UV-A (320-400 nm) and PAR (400-700 nm) were higher at mid-latitudes (Puerto Madryn, 42°47'S). A similar south-to-north increase was evident in the ratio of the energy at 305 nm and 340 nm wavelengths (with low 305/340 ratios indicating high total ozone column concentration), with low values at Ushuaia (55°01'S) and high values at Jujuy (24°10'S). However the 305/340 ratios increased significantly over their normal spring values at two s res Ushuaia and Puerto Madryn, for variable me periods during October-December. Our data suggest that the ozone hole was over South America extending to about 38°S for at least a week during October and about two weeks during November-December of the years of 1994 and 1995. However, it should be noted that the erythemal irradiance, in the area influenced by the ozone hole, was at all times lower than that in Buenos Aires and well below the value at Jojuy (tropical station). This study also indicates that when assessing the impact of solar UVR upon organisms, other variables such as cloud cover, solar zenith angle, day length, latitude, and atmospheric pollution should be considered in addition to total ozone column concentration.

Registro:

Documento: Artículo
Título:Latitudinal UVR-PAR measurements in Argentina: Extent of the 'ozone hole'
Autor:Orce, V.L.; Helbling, E.W.
Filiación:Inst. de Genet./Biol. Molec., Vuelta de Obligado 2490, 2 Piso, 1428 Buenos Aires, Argentina
Estac. de Fotobiologia Playa Union, Consejo Nac. de Invest. Cie./Tec., Casilla de Correos No. 153, 9100 Trelew, Chubut, Argentina
Palabras clave:irradiance; ozone hole; PAR; tropospheric pollution; ultraviolet; Argentina; Rickettsia sp. PAR
Año:1997
Volumen:15
Número:3-4
Página de inicio:113
Página de fin:121
DOI: http://dx.doi.org/10.1016/S0921-8181(97)00007-6
Título revista:Global and Planetary Change
Título revista abreviado:GLOBAL PLANET. CHANGE
ISSN:09218181
CODEN:GPCHE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09218181_v15_n3-4_p113_Orce

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Citas:

---------- APA ----------
Orce, V.L. & Helbling, E.W. (1997) . Latitudinal UVR-PAR measurements in Argentina: Extent of the 'ozone hole'. Global and Planetary Change, 15(3-4), 113-121.
http://dx.doi.org/10.1016/S0921-8181(97)00007-6
---------- CHICAGO ----------
Orce, V.L., Helbling, E.W. "Latitudinal UVR-PAR measurements in Argentina: Extent of the 'ozone hole'" . Global and Planetary Change 15, no. 3-4 (1997) : 113-121.
http://dx.doi.org/10.1016/S0921-8181(97)00007-6
---------- MLA ----------
Orce, V.L., Helbling, E.W. "Latitudinal UVR-PAR measurements in Argentina: Extent of the 'ozone hole'" . Global and Planetary Change, vol. 15, no. 3-4, 1997, pp. 113-121.
http://dx.doi.org/10.1016/S0921-8181(97)00007-6
---------- VANCOUVER ----------
Orce, V.L., Helbling, E.W. Latitudinal UVR-PAR measurements in Argentina: Extent of the 'ozone hole'. GLOBAL PLANET. CHANGE. 1997;15(3-4):113-121.
http://dx.doi.org/10.1016/S0921-8181(97)00007-6