Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.490 IF 1.490
  • IF 5-year value: 1.445 IF 5-year
    1.445
  • CiteScore value: 2.9 CiteScore
    2.9
  • SNIP value: 0.789 SNIP 0.789
  • IPP value: 1.48 IPP 1.48
  • SJR value: 0.74 SJR 0.74
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 88 Scimago H
    index 88
  • h5-index value: 21 h5-index 21
Volume 28, issue 11
Ann. Geophys., 28, 2071–2077, 2010
https://doi.org/10.5194/angeo-28-2071-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 28, 2071–2077, 2010
https://doi.org/10.5194/angeo-28-2071-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  09 Nov 2010

09 Nov 2010

Daytime sodium airglow emission measurements over Trivandrum using a scanning monochromator: first results

M. M. Hossain1, T. K. Pant1, C. Vineeth1, S. G. Sumod1, and R. Sridharan2 M. M. Hossain et al.
  • 1Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum 695022, India
  • 2Physical Research Laboratory, Ahmedabad 380009, India

Abstract. This paper presents measurement of daytime Sodium (Na) airglow emissions at 589.6 nm wavelength using a ground based 1-m scanning monochromator from Trivandrum (8.5° N, 77° E, 0.5° N dip latitude), a near-equatorial station in India. The Na emission intensity exhibits significant temporal variability within a day and from one day to another. The Na intensity has been compared with the daytime OH airglow intensity at 731.6 nm simultaneously measured using the unique Multiwavelength Dayglow Photometer (MWDPM). The temporal variabilities of the Na and OH intensities corroborate each other in most of the occasions without any appreciable time delay, although a small time delay up to ~10 min has been observed at times. It appears that the variability of daytime Na emissions is influenced too by the photo-chemical excitations. The observed similarities in the Na and OH intensities are believed to be due to the similar roles played by [O] and O3 (in their photo-chemical excitations) and the dynamics occurring at about the same altitude region (~90 km). It has also been found that the gravity waves play significant role in producing the short-scale oscillations in these emissions.

Publications Copernicus
Download
Citation