![Sample our Environment & Agriculture journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5934/TOC-Subject-Sample-2021-Environment-Agriculture.jpg"})
Abstract
Using data from ground-based spectrometric measurements of stratospheric column nitrogen dioxide (NO2) within the Network for the Detection of Atmospheric Composition Change (NDACC), analyses are made of the diurnal and annual variations of NO2, the NO2 decrease relating to the Pinatubo eruption, the NO2 change during the 11-year cycle of solar activity (SA), and the linear trends in NO2. Latitudinal dependences of these variations and trends are revealed. In particular, the annual trend estimates of column NO2 are predominantly positive in the middle latitudes of the Southern Hemisphere (SH) whereas negative NO2 trends are observed in the middle Northern Hemisphere (NH) latitudes. Column NO2 content in the middle latitudes of the two hemispheres is generally larger during the SA minimum than during the SA maximum (negative sign of the SA effect).
Acknowledgements
The author is grateful to the staff of the observational stations and NDACC for providing the data from NO2 measurements, and to G. P. Brasseur for providing an opportunity to perform calculations with the SOCRATES model. The model calculations were performed at the Max Planck Institute for Meteorology in Hamburg. This study was supported by the Russian Foundation for Basic Research (project no. 08-05-00358), the International Science and Technology Centre (project nos. 3032, 3254), and by the Russian Academy of Sciences.
