极地冻雨环境下螺旋桨式风传感器改进技术初探

在平行轴螺旋桨式风传感器的基础上,制作一个安装于螺旋桨式风传感器风速轴组件上的防冻雨装置,通过这种技术改进,使得改造后的风传感器能在冻雨天气下正常观测,并在中国南极长城站开展了现场试验。通过数据检验分析,改造后的风传感器可有效提升数据可用率,提升了观测连续性,减少了人力劳动。本改进技术对极地地区、我国贵州省等冻雨灾害多发地区的气象观测具有重要意义。     

面向航运服务的海冰密集度遥感产品对比研究

北极快速升温为北极通航窗口期延长提供了重大机遇,为北极航运和极区科考船只的空间信息提供服务,海冰边缘区浮冰遥感信息产品的可靠性非常关键.对比和分析了9种海冰密集度数据产品,并采用高分雷达数据开展面向海冰边缘区精度评估.结果表明,北极地区的9种海冰密集度产品相对其平均值的最大日偏差出现在夏季6—8月航道窗口期,其中采用被...     

Effects of extratropical solar penetration on North Atlantic Ocean circulation and climate

Effects of extratropical solar penetration on the North Atlantic Ocean circulation and climate are investigated using a coupled ocean-atmosphere model.In this model,solar penetration generates basinwide cooling and warming in summer and winter,respectively.Associated with SST changes,annual mean surface wind stress is intensified in both the subtropical and subpolar North Atlantic,which leads to acceleration of both subtropical and subpolar gyres.Owing to warming in the subtropics and significant saltiness in the subpolar region,potential density decreases(increases) in the subtropical(subpolar)North Atlantic.The north-south meridional density gradient is thereby enlarged,accelerating the Atlantic meridional overturning circulation(AMOC).In addition,solar penetration reduces stratification in the upper ocean and favors stronger vertical convection,which also contributes to acceleration of the AMOC.