Author(s)

F.X. Meixner

Abstract

Among the different components of the surface exchange of nitric oxide anthropogenic as well as biogenic emissions are overwhelming. While inventories for anthropogenic NO% sour- ces are presently among the most thorough compilations of pollutants' emissions, our know- ledge on biogenic NO emissions is comparatively poor. A brief overview is given about (a) the importance of NO% emissions for tropospheric chemistry, (b) the present estimate of glo- bal NO emissions, (c) techniques suitable for the mesurement of NO surface exchange, (d) microbial and abiotic processes regulating the soil-biogenic NO emission and its main influ- encing factors, and (e) the present state of modeling (global) soil-biogenic NO inventories. 1 Introduction Among the presently best defined atmospheric effects of odd nitr

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