DOAS Measurements of Tropospheric Bromine Oxide in Mid-Latitudes

• Published in: Science
• Main Authors: Hebestreit, Kai, Stutz, Jochen, Rosen, David, Matveiv, Valery, Peleg, Mordechai, Luria, Menachem, Platt, Ulrich
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Association for the Advancement of Science (AAAS) 1999
• Subjects: Arctic
• Online Access: http://dx.doi.org/10.1126/science.283.5398.55; https://www.science.org/doi/pdf/10.1126/science.283.5398.55

Episodes of elevated bromine oxide (BrO) concentration are known to occur at high latitudes in the Arctic boundary layer and to lead to catalytic destruction of ozone at those latitudes; these events have not been observed at lower latitudes. With the use of differential optical absorption spectroscopy (DOAS), locally high BrO concentrations were observed at mid-latitudes at the Dead Sea, Israel, during spring 1997. Mixing ratios peaked daily at around 80 parts per trillion around noon and were correlated with low boundary-layer ozone mixing ratios.