纬流 meaning in Chinese

zonal flow

This paper use the ncep / ncar day - to - day reanalysis data of 500hpa high field and so on , choose ural mountain , baikal , okhotsk as the key district , the mid - high latitude of eurasia circulation courses that have long duration ( scale of time is middle , namely during 10 - 30 day ) , maybe continue continuously after being intermittence of 1 - 2 days in middle , appear repeatedly is for research object , define an index " i " of the circulation pattern over mid - high latitude of eurasia . a method is proposed to identify the summer typical persistent circulation pattern at 500hpa levels over eurasia mid - high latitude . the climate characteristics of those typical persistent circulation patterns are studied
本文利用ncep / ncar再分析逐日500hpa高度场等资料，选择乌拉尔山、贝加尔湖、鄂霍次克海这三个地方作为关键区，以夏季欧亚中高纬度持续时间长(时间尺度属于中间时间尺度，即10 ? 30天之间) 、中间可能会间歇1 、 2天然后又继续持续、反复出现的环流过程为研究对象，定义了一个夏季欧亚中高纬流型指数，在此基础上提出了一种对夏季欧亚中高纬500hpa典型持续流型的界定方法，研究了典型持续流型的气候特征，分析了流型指数的年代际变化，以及对应不同阶段、不同流型的降水场、加热场、海温场等的主要特征。