Ammmonia measurements

We use a Mini-DOAS instrument to measure ammonia. It is a miniature version of the Differential Optical Absorption Spectroscopy, allowing to measure atmospheric NH3, as well as NO, and SO2. It is an open-path sensor, thereby overcoming the problem that NH3 sticks to surfaces. We investigate the use of this instrument in the Cabauw measurement tower and in different campaigns at farmhouses.

Ruisdael Observatory