摘要
论述了太阳辐射、大气环流和地表状况是形成气候的3个基本因素。此外,还有人类活动、太阳活动、火山活动等影响气候变化的第4类因子。影响全球气候变暖的因素既有自然因素,也有人为因素。但导致近百年全球气候持续变暖的主要因素是人为因素(人类活动),即自19世纪末工业革命后,世界各国工业化、城市化快速发展,使大气中CO2等“温室效应”气体持续增加,而森林植被遭到大量砍伐和破坏,全球森林植被覆盖率持续下降,平衡大气中CO2与O2的生态功能不断下降,结果导致全球“温室效应”持续增强,使近百年来全球气候持续变暖。自然因素太阳活动对全球气候变暖的影响是周期性而不是持续性的。太阳活动增强期(高峰期)有增温作用,减弱期(低谷期)有降温作用,对全球气候变暖有影响,但比起人类活动造成的CO2等气体“温室效应”持续增强对气候持续变暖的影响相对较小。
The solar radiation,atmospheric circulation and earth surface condition are the three fundamental elements that would cause climate warming.There is forth element,including human activity,solar activity and volcano activity.Elements that cause global warming including natural and human activity,but the main one is the latter.Since the Industrial Revolution at the end of 19th century,the industrialization and urbanization in the world have developed quickly,which caused continuous increase of 'greenhouse gas',such as CO_(2),and much of the forest is cut or destroyed,the forest land coverage is decreased continuously,the forest function for balancing the CO_(2) and O_(2) is weakened.This lead to more stronger 'greenhouse effect',and the continuous higher temperature.As to the solar activity,the effect on global climate warming is more periodical than continuous.At the stronger period of solar activity,the effect is to make the temperature higher;during the weaker period,the temperature would be lower.Relatively it is not important as compared to human activity.
出处
《自然灾害学报》
CSCD
北大核心
2005年第5期38-42,共5页
Journal of Natural Disasters
