Isoprene derived radicals are the most strongly bound of RO2 species
investigated and their degree of complexation at approx. 300 K far surpasses that of the generic peroxy
radicals by 3e5%. At higher altitudes (approx. 8 km) characterized by sub-ambient temperatures, the
fraction of RO2.H2Ocomplex that can exist is approximately 17% in the upper troposphere aboveMace Head
(Northern Hemisphere),14% above Cape Grim (Southern Hemisphere), and 8% aboveMauna Loa (Tropics).
© 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license