The ability of the stratospheric Quasi‐Biennial Oscillation ( QBO ) to modulate tropospheric circulation allows it to modulate tracks of tropical cyclones ( TCs ). This possibility is examined using data on the cyclone tracks over the Bay of Bengal ( BOB ) during the period 1948–2010. TC tracks (excluding the El Niño‐Southern Oscillation years) when stratified as per the phases of QBO show the evidence of influence of stratosp...

Sun photometer‐derived multi‐spectral aerosol optical depth (AOD) measurements made at Pune (18°32′N, 73°51′E), India, during the period May 1998–December 2007 have been used to examine possible long‐term trends and variability. Long‐term mean AOD in the spectral range 380–1020 nm ranged between 0.593 ± 0.11 and 0.220 ± 0.04 with a coefficient of variation (COV) of 34–49%. Day‐to‐day variations in AOD at all the wavelengths in...