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首页> 外文期刊>Climate dynamics >Simultaneous observations of SAO and QBO in winds, temperature and ozone in the tropical middle atmosphere over Thumba (8.5°N, 77°E)
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Simultaneous observations of SAO and QBO in winds, temperature and ozone in the tropical middle atmosphere over Thumba (8.5°N, 77°E)

机译：同时在Thumba（8.5°N，77°E）的热带中间大气中的风，温度和臭氧中同时观测SAO和QBO

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摘要

Owing to the importance of middle atmosphere, recently, a Middle Atmospheric Dynamics (MIDAS) program was carried out during the period 2002-2007 at Thumba (8.5°N, 77°E). The measurements under this program, involving regular radiosonde/rocket flights as well as atmospheric radars, provided long period observations of winds and temperature in the middle atmospheric region from which waves and oscillations as well as their forcing mechanisms particularly in the low-latitude middle atmosphere could be analyzed. However, a detailed analysis of the forcing mechanisms remains incomplete due to the lack of important measurements like ozone which is a significant contributor to atmospheric dynamics. Presently, profiles of ozone are available from TIMED/SABER (Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics/Sounding of the Atmosphere using Broad Emission Radiometry) satellite globally from about 15 to 100 km, over multiple years since 2002. In this regard, a comprehensive study has been carried out on ozone and its variability at Quasi Biennial Oscillation (QBO) and Semiannual Oscillation (SAO) scales using TIMED/SABER ozone observations during the MIDAS campaign period. Before using the TIMED/SABER ozone measurements, an inter-comparison has been carried out with in situ measurements of ozone obtained under the Southern Hemisphere Additional Ozonesondes (SHADOZ) campaign for the year 2007 at few stations. The inter-comparison showed very good agreement between SABER and ozonesonde derived ozone profiles. After validating the SABER observations, ozone profiles are used extensively to study the QBO and SAO along with temperature and winds in the 20-100 km height region. It is known that the SAO in mesosphere and stratosphere are in opposite phases, but the present study for the first time reports the aspect of opposite phases in the mesosphere itself. Thus, the present work attempts to study the long-period oscillations in stratosphere and mesosphere in ozone, temperature and winds simultaneously for the first time over this latitude. These observations provided a unique opportunity to explore long-period oscillations in chemistry, dynamics and thermal structure of the middle atmosphere simultaneously.
机译：由于中层大气的重要性，最近在2002-2007年期间在Thumba（8.5°N，77°E）实施了中层大气动力学（MIDAS）计划。该计划下的测量包括常规的探空仪/火箭飞行以及大气雷达，可对中层大气区域的风和温度进行长期观测，从中可观察到波浪和振荡及其强迫机制，特别是在低纬度中层大气中可以分析。但是，由于缺乏重要的测量手段（如臭氧，这是对大气动力学的重要贡献），因此对强迫机制的详细分析仍不完整。目前，从2002年开始的数年中，全球大约15至100 km的卫星从TIMED / SABER（热层，电离层，中层能级和动力学/使用广义发射辐射计的大气声）卫星提供了大约15至100 km的臭氧剖面图。在MIDAS战役期间，使用TIMED / SABER臭氧观测资料对准两年一次振荡（QBO）和半年一次振荡（SAO）尺度上的臭氧及其变化进行了全面研究。在使用TIMED / SABER臭氧测量值之前，已经进行了一次相互比较，以实地测量在2007年南半球其他臭氧探空仪（SHADOZ）活动中在几个站获得的臭氧。此次比对表明，SABRE和臭氧探空仪得出的臭氧剖面非常吻合。在验证SABRE观测结果之后，臭氧剖面被广泛用于研究QBO和SAO以及20-100 km高度区域中的温度和风。众所周知，中层和平流层的SAO处于相反的相位，但本研究首次报道了中层本身的相反相位。因此，本工作试图首次在此纬度上同时研究平流层和中层层在臭氧，温度和风中的长期振荡。这些观察提供了独特的机会，可以同时探索中层大气的化学，动力学和热结构的长期振荡。

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  • 来源
    《Climate dynamics》 |2011年第10期|p.1961-1973|共13页
  • 作者

    Karanam Kishore Kumar; Debadatta Swain; Sherine Rachel John; Geetha Ramkumar;

  • 作者单位

    Space Physics Laboratory, Vikram Sarabhai Space Center,Thiruvananthapuram 695022, India;

    Space Physics Laboratory, Vikram Sarabhai Space Center,Thiruvananthapuram 695022, India;

    Space Physics Laboratory, Vikram Sarabhai Space Center,Thiruvananthapuram 695022, India;

    Space Physics Laboratory, Vikram Sarabhai Space Center,Thiruvananthapuram 695022, India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    middle atmosphere; ozone; QBO; SAO;

    机译：中间气氛臭氧;QBO;AO;

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