VARIATIONS IN UV-RADIATION IN CHILE

被引:70
作者
CABRERA, S
BOZZO, S
FUENZALIDA, H
机构
[1] UNIV CHILE, FAC MED, DEPT EXPTL MED, SANTIAGO, CHILE
[2] UNIV CHILE, FAC MATH & PHYS SCI, DEPT GEOPHYS, SANTIAGO, CHILE
关键词
UV RADIATION; ALTITUDINAL CHANGES; URBAN POLLUTION;
D O I
10.1016/1011-1344(94)07103-U
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The first observations of UV global radiation in Chile with a portable multichannel radiometer are reported. Four UV wavelengths are included: 305, 320, 340 and 380 nm. Observation latitudes spanning from 18 degrees to 53 degrees S allow an estimation of latitudinal variations in daily maxima for both summer and winter. Measurements over Santiago deviate from a smooth latitudinal profile, probably as a consequence of urban air pollution. The main effect of this is to prevent UV solar radiation from reaching the ground, especially during winter. Altitudinal increments in UV radiation are estimated by comparing observations along the coast and valleys with others on the Andes and one isolated summit. Diurnal variations in the height increment support an increase from morning to evening. The results indicate that in rural areas the altitudinal increment is lower (4%-10% per kilometre) than that reported for Europe, reaching very low magnitudes (2% or less) in the Andean summits of desert regions.
引用
收藏
页码:137 / 142
页数:6
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