“DEPLETION OF OZONE AND ITS EFFECT ON NIGHT AIRGLOW INTENSITY OF Na 5893 A° AT TRIVANDRUM (8.25° N, 76.9° E) AND HALLEY BAY (76° S, 27° W)”. MAUSAM 57, no. 2 (April 3, 2006): 350–354. Accessed January 12, 2026. https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/512.