太阳活动对全球气候的影响一直是人们关心的热门话题,尤其是太阳活动对海温和降水的影响吸引更多学者的目光.本文通过研究全球0~700 m海温对太阳射电通量(Solar Radio Flux,缩写为SRF)的响应,发现全球海温对太阳活动响应具有空间分布不...太阳活动对全球气候的影响一直是人们关心的热门话题,尤其是太阳活动对海温和降水的影响吸引更多学者的目光.本文通过研究全球0~700 m海温对太阳射电通量(Solar Radio Flux,缩写为SRF)的响应,发现全球海温对太阳活动响应具有空间分布不均匀性特征,显著响应的地区集中在太平洋和南大西洋,显著响应的层次主要在0~200 m.利用响应太阳活动显著区域的海温资料,定义一个响应太阳活动的海温异常指数,研究该指数与同期和滞后1年全球冬夏季降水的相关分布,发现指数高时夏季热带中太平洋降水增多,南北半球中高纬地区降水增加,呈带状分布,南极地区降水显著减少;我国江南东部地区、青藏高原和山东半岛降水减少.冬季热带中部太平洋和东南太平洋地区降水增多,赤道西太平洋降水明显偏少,北极地区降水显著偏多,热带西太平洋和孟加拉湾降水减少,南北两个半球中高纬度地区降水增多;我国华南地区广西和广东西部、海南一带降水增多,东北地区降水减少,青藏高原地区降水显著增加.当海温异常指数低时,情况相反.研究结果表明,海温异常通过影响降水放大了太阳活动的作用.由此推测,在考虑夏季降水的预测问题时,由太阳活动引起的太平洋和大西洋海温异常对降水的影响应该引起重视.展开更多
In this study, the relationship between the neutral components （N2 and 02） in the E-region of the ionosphere （at 110 km altitude） for the Singapore （01.23 N; 103.55 E） station in the equatorial region and the FI...In this study, the relationship between the neutral components （N2 and 02） in the E-region of the ionosphere （at 110 km altitude） for the Singapore （01.23 N; 103.55 E） station in the equatorial region and the FI0.7 solar flux and z-component of Interplanetary Magnetic Field （IMF-Bz） was investigated. This relationship was determined by means of statistical multiple regression model. As a result, it was observed that the changes in F10.7 solar flux and IMF-Bz were inversely proportional to the changes in N2 and 02. 92% and 83% of changes in N2 and O2 were found to be explained by F10.7 solar flux and IMF-Bz, respectively. When the F10.7 solar flux is changed by 1 s.f.u., it causes a decrease of 2.61×10TM m-3 in N2 and 2.96×1014 m-3 in O2. Change of I nT in IMF-Bz causes a decrease of 9.95× 1015 m-3 in N2 and 1.69× 1015 m-3 in O2.展开更多
文摘太阳活动对全球气候的影响一直是人们关心的热门话题,尤其是太阳活动对海温和降水的影响吸引更多学者的目光.本文通过研究全球0~700 m海温对太阳射电通量(Solar Radio Flux,缩写为SRF)的响应,发现全球海温对太阳活动响应具有空间分布不均匀性特征,显著响应的地区集中在太平洋和南大西洋,显著响应的层次主要在0~200 m.利用响应太阳活动显著区域的海温资料,定义一个响应太阳活动的海温异常指数,研究该指数与同期和滞后1年全球冬夏季降水的相关分布,发现指数高时夏季热带中太平洋降水增多,南北半球中高纬地区降水增加,呈带状分布,南极地区降水显著减少;我国江南东部地区、青藏高原和山东半岛降水减少.冬季热带中部太平洋和东南太平洋地区降水增多,赤道西太平洋降水明显偏少,北极地区降水显著偏多,热带西太平洋和孟加拉湾降水减少,南北两个半球中高纬度地区降水增多;我国华南地区广西和广东西部、海南一带降水增多,东北地区降水减少,青藏高原地区降水显著增加.当海温异常指数低时,情况相反.研究结果表明,海温异常通过影响降水放大了太阳活动的作用.由此推测,在考虑夏季降水的预测问题时,由太阳活动引起的太平洋和大西洋海温异常对降水的影响应该引起重视.
文摘In this study, the relationship between the neutral components （N2 and 02） in the E-region of the ionosphere （at 110 km altitude） for the Singapore （01.23 N; 103.55 E） station in the equatorial region and the FI0.7 solar flux and z-component of Interplanetary Magnetic Field （IMF-Bz） was investigated. This relationship was determined by means of statistical multiple regression model. As a result, it was observed that the changes in F10.7 solar flux and IMF-Bz were inversely proportional to the changes in N2 and 02. 92% and 83% of changes in N2 and O2 were found to be explained by F10.7 solar flux and IMF-Bz, respectively. When the F10.7 solar flux is changed by 1 s.f.u., it causes a decrease of 2.61×10TM m-3 in N2 and 2.96×1014 m-3 in O2. Change of I nT in IMF-Bz causes a decrease of 9.95× 1015 m-3 in N2 and 1.69× 1015 m-3 in O2.
