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高纬地区低层大气行星波的无线电探空仪观测研究 被引量:1

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摘要 本文通过分析美国阿拉斯加地区三个站点(Nome,64.50°N,165.43°W;McGrath,62.97°N,155.62°W;Fairbanks,64.82°N,147.87°W)无线电探空仪1998~2006年观测数据,研究了北半球高纬地区低层大气行星波特性.通过分析发现行星波主要存在于两个区域,一个在对流层顶附近,一个在冬季极夜急流附近,两个区域的行星波都具有明显的间断性,持续时间一般不超过2个月;三个分量中,温度扰动量的振幅最小,经向风扰动量的振幅最大.对流层顶附近的行星波没有明显的季节变化且谱成分较为复杂,5天波的振幅最小,10天波的振幅略强于16天波.极夜急流附近的行星波主要出现在冬季,波振幅比对流层顶附近小,主要为10天波和16天波,且16天波的振幅强于10天波.由折射指数可以看出,夏季在对流层上方有明显反射层,冬季则较弱甚至消失,很好地解释了平流层行星波主要在冬季出现的原因.对2003/2004年冬季三个站点行星波的细致分析发现对流层区域和极夜急流区域出现明显的准10天波和准16天波,准10天在垂直方向为驻波,温度分量垂直波长约为12km,经向风分量垂直波长大于26km,波自东向西传,纬向波数在2~4之间.准16天波在垂直方向也是驻波,垂直波长大于20km,且在水平方向是一个静态波.
出处 《中国科学:地球科学》 CSCD 北大核心 2010年第5期603-617,共15页 Scientia Sinica(Terrae)
基金 国家自然科学基金(批准号:40825013 40731055 40774085 40774084) 教育部长江学者和创新团队发展计划和空间天气重点实验室开放基金资助
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同被引文献24

  • 1鲁娴,张绍东.中国中部低层大气行星波无线电探空仪的观测研究[J].空间科学学报,2005,25(6):529-535. 被引量:3
  • 2陈文.北半球冬季准定常行星波传播的年代际变化[J].自然科学进展,2006,16(4):485-489. 被引量:9
  • 3杨蕾,陈文,黄荣辉.北半球准定常行星波气候平均态的资料分析和数值模拟[J].大气科学,2006,30(3):361-376. 被引量:10
  • 4张晓芳,严卫.中高层大气探测技术的研究进展[J].气象科学,2007,27(4):457-463. 被引量:16
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