Summertime total OH reactivity measurements from boreal forest during HUMPPA-COPEC 2010

Ambient total OH reactivity was measured at the Finnish boreal forest station SMEAR II in Hyytiälä (Latitude 61°51' N; Longitude 24°17' E) in July and August 2010 using the Comparative Reactivity Method (CRM). The CRM – total OH reactivity method – is a direct, in-situ determination of the total loss rate of hydroxyl radicals (OH) caused by all reactive species in air. During the intensive field campaign HUMPPA-COPEC 2010 (<b>H</b>yytiälä <b>U</b>nited <b>M</b>easurements of <b>P</b>hotochemistry and <b>P</b>articles in <b>A</b>ir – <b>C</b>omprehensive <b>O</b>rganic <b>P&l…