SOLAR ULTRAVIOLET-RADIATION AT THE EARTHS SURFACE
SOLAR ULTRAVIOLET-RADIATION AT THE EARTHS SURFACE
复制标题
DOI：
10.1111/j.1751-1097.1989.tb05548.x
复制
发表时间：
1989-10-01
影响因子：
3.3
通讯作者：
HAYWOOD, EK
中科院分区：
文献类型：
--
作者：
FREDERICK, JE;SNELL, HE;HAYWOOD, EK
地球表面的生物有效紫外线辐照度随太阳高度、大气臭氧量以及自然和人为来源的散射体和吸收体的丰度而变化。单独来看，据报道北半球臭氧柱在1969年至1986年之间减少，这意味着夏季地面的红斑辐照度增加了4%或更少。但是，局部地区污染气体或微粒引起的对流层吸收的增加可以抵消预期的辐射增强。任何这种额外吸收在性质上很可能是高度区域性的，并不意味着红斑辐射在全球范围内发生了减少。南极的“臭氧空洞”是一种特殊情况，在这种情况下，地球的一部分地区在春季经历的紫外线辐射水平远远超过本十年之前的水平。
The biologically effective ultraviolet irradiance at the earth's surface varies with the elevation of the sun, the atmospheric ozone amount, and with the abundance of scatterers and absorbers of natural and anthropogenic origin. Taken alone, the reported decrease in column ozone over the Northern Hemisphere between 1969 and 1986 implies an increase in erythemal irradiance at the ground of four percent or less during summer. However, an increase in tropospheric absorption, arising from polluting gases or particulates over localized areas, could more than offset the predicted enhancement in radiation. Any such extra absorption is likely to be highly regional in nature and does not imply that a decrease in erythemal radiation has occurred on a global basis. The Antarctic ‘ozone hole’ represents a special case in which a portion of the earth has experienced ultraviolet radiation levels during spring that are far in excess of those which prevailed prior to the present decade.