HONO - Nitrous acid (HONO) emissions from acidic boreal soils

Principal investigator: Assoc. Prof. Marja Maljanen

Funding period: 2015-2016 (Marjatta ja Eino Kolli foundation)

The photolysis of nitrous acid (HONO) is an important source of OH radical, the key oxidizing agent in the atmosphere. Recently it has been reported that nitrite (NO2-) in soil can also be one source of atmospheric HONO. We published the first HONO emissions from dominant northern acidic soils in microcosm experiments and showed that these soils may act as sources of atmospheric HONO. In this project we study emissions from agricultural soils, which are the most potential sources of HONO. Further studies are needed to understand the origin of HONO and the importance of different soils as sources of HONO. This study is made in co-operation with the Department of Applied Physics (Pasi Yli-Pirilä and Jorma Joutsensaari).


LOPAP analyzer for HONO