Record Details

<p>Latitudinal variation in vertical distribution of meteor decay time and its relation with mesospheric Ozone in the altitude range of 80-90 km</p>

Online Publishing @ NISCAIR

View Archive Info
 
 
Field Value
 
Authentication Code dc
 
Title Statement <p>Latitudinal variation in vertical distribution of meteor decay time and its relation with mesospheric Ozone in the altitude range of 80-90 km</p>
 
Added Entry - Uncontrolled Name Battula, PREMKUMAR ; Osmania University
DV, PHANIKUMAR ; Department of Science & Technology
K, CHENNA REDDY ; Osmania University
K, KISHORE KUMAR ; Space Physics Laboratory, Vikram Sarabhai Space Centre
G, YELLAIAH ; Osmania University
 
Uncontrolled Index Term Meteor radar; Meteor decay time; Ozone concentration
 
Summary, etc. <p><span>Investigations on meteor trail decay time and its evolution in the mesosphere and lower thermosphere are very important to estimate the temperature in this region. The present study focuses on the vertical distribution of meteor decay times at three different latitudes to understand the mechanism responsible for the deviation of meteor decay time from the theoretical estimations below 90 km of altitude. The present study is based on measurements from three identical meteor radars located at equatorial (Kototabang: 0.2° S, 100.3° E), low (Thumba: 8.5° N, 76.9° E) and polar latitudes (Eureka: 80.0° N, 85.8° W). The results reveal a pronounced seasonal variation of vertical distribution of meteor decay time turning altitude (inflection point) over polar latitudes as compared to that over equatorial and low latitudes. Apart from direct estimations from meteor radar observations, the meteor decay time is estimated using temperature and pressure measurements from the SABER/TIMED. Above 90 km of altitude, decay times estimated from both methods are in good agreement. However, below 90 km of altitude, these estimations start deviating and it has been noted that the deviation increases with decreasing altitude. Further, observed meteor decay times correlated with ozone concentration at three representative altitude bins. The correlation analysis reveals a significant negative correlation at 80 - 90 km of altitude over the three latitudes indicating that an increase in ozone concentration results in decrease in meteor decay time. The significance of the present results lies in analyzing the vertical distribution of meteor decay time simultaneously from three radar locations representing equatorial, low and polar latitudes and evaluating the relation between ozone concentration and meteor decay time, quantitatively.</span></p>
 
Publication, Distribution, Etc. Indian Journal of Radio & Space Physics (IJRSP)
2022-04-27 13:56:28
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJRSP/article/view/50939
 
Data Source Entry Indian Journal of Radio & Space Physics (IJRSP); ##issue.vol## 50, ##issue.no## 3 (2021): IJRSP SEPTEMBER 2021
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJRSP/article/download/50939/465565148
http://op.niscair.res.in/index.php/IJRSP/article/download/50939/0
 
Terms Governing Use and Reproduction Note Except where otherwise noted, the Articles on this site are licensed underCreative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India© 2012. The Council of Scientific &amp; Industrial Research, New Delhi.