Solar-wind-magnetosphere energy influences the interannual variability of the northern-hemispheric winter climate

• 来源期刊: 国家科学评论（英文版）
• 关键词: solar wind winter climate interannual variability stratosphere
• 年，卷（期）: 2020,（1）
• 页码范围: 141-148
• 页数: 8页
• 语种: 英文
• DOI: 10.1093/nsr/nwz082

摘要

Solar irradiance has been universally acknowledged to be dominant by quasi-decadal variability,which has been adopted frequently to investigate its effect on climate decadal variability.As one major terrestrial energy source,solar-wind energy flux into Earth's magnetosphere (Ein) exhibits dramatic interannual variation,the effect of which on Earth's climate,however,has not drawn much attention.Based on the Ein estimated by 3D magnetohydrodynamic simulations,we demonstrate a novelty that the annual mean Ein can explain up to 25％ total interannual variance of the northern-hemispheric temperature in the subsequent boreal winter.The concurrent anomalous atmospheric circulation resembles the positive phase of Arctic Oscillation/North Atlantic Oscillation.The warm anomalies in the tropic stratopause and tropopause induced by increased solar-wind-magnetosphere energy persist into the subsequent winter.Due to the dominant change in the polar vortex and mid-latitude westerly in boreal winter,a'top-down'propagation of the stationary planetary wave emerges in the Northern Hemisphere and further influences the atmospheric circulation and climate.