An analysis of ozone measurements at Cerro Tololo (30oS, 70oW, 2200 m.a.s.l.) in Chile

• DOI: 10.1034/j.1600-0889.2000.00959.x
• Publication Date: 2003-03-12T21:15:59Z
• Authors: LAURA GALLARDO; JORGE CARRASCO; GUSTAVO OLIVARES
• Keywords: 13. Climate action; 15. Life on land; 01 natural sciences; 0105 earth and related environmental sciences

Increases in tropospheric ozone (O 3 ) abundance are likely to take place the near future populous and rapidly developing countries tropics subtropics. An accurate evaluation of impact increasing industrial activities tropical subtropical areas requires knowledge background levels ozone. New monitoring stations have been installed at several sites by World Meteorological Organization (WMO) since mid-90s. We analyze data collected during two years April 1996 Cerro Tololo (30°S, 70°W, 2200 m.a.s.l.) some 50 km east from city La Serena. In this paper, we describe atmospheric chemistry meteorology that characterizes site. The show a seasonal variation with maximum mixing ratios late winter spring minimum summer early fall. These variations most associated large-scale subsidence Hadley circulation location jet stream (STJ). Also, there is diurnal probably partly mountain wind flow which strongest months. No significant marine boundary layer air perturbed anthropogenic apparent data. find site be generally representative for conditions free-tropospheric subtropics Southern Hemisphere. This work done within framework larger effort recently started Chilean institutions cooperation research centers abroad. DOI: 10.1034/j.1600-0889.2000.00959.x