Year: 2018
Type: article
Abstract: 特定区域气候系统对太阳分光谱辐射的响应和放大机制是当代气候和气候变化研究的热点科学问题之一。本文聚焦太阳紫外辐射和东亚地区，阐述近年来太阳紫外辐射的卫星观测和数据重建进展，总结太阳紫外辐射影响东亚冬季气候的途径和关键环节，即太阳紫外辐射直接作用于平流层臭氧，通过改变臭氧分布影响平流层大气的温度和环流场，进而通过平流层–对流层的耦合作用将太阳活动信号向对流层和极地传播，并通过调制北极涛动等大气遥相关型的位相影响东亚大气环流，实现对东亚冬季气候的间接作用。目前的研究认为太阳紫外辐射增强(减弱)常易激发正位相(负位相)北极涛动，对应东亚冬季暖冬(寒潮低温)。最后，展望了该领域未来的研究重点，即基于大气–海洋–化学耦合的气候系统模式开展太阳紫外辐射影响东亚冬季气候的量化评估和研究。 The response and potential amplify mechanism of earth climate at certain regions to the solar ac-tivity are one of the most important scientific issues in the modern climate research. This study reviews the advancements of satellite observation of solar spectrum and the reconstruction of da-taset based on that. Then the key processes of the solar ultraviolet impacting the winter climate in East Asia are summarized. Generally, it includes the direct impacts of solar ultraviolet on the dis-tribution of stratospheric ozone, the temperature and circulation. Then the signal is transported downward and poleward by the interaction of stratosphere and troposphere, and modulates the phase of the Arctic Oscillation (AO), which further impact the circulation and the winter climate of East Asia. The current studies show that the enhancement (reduce) of the solar ultraviolet tends to arouse the positive (negative) phase of AO, and then cause the warm (cold) winter in East Asia. Fi-nally, the paper points out that quantitative study of these impacts based on the full coupled earth system model will be one key of breakthrough in this area.
Source: Advances in Geosciences
Author: 琦 钟
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Climate action
Open Access status: hybrid
OpenAlex ID: W2900077298