Ground based in situ observations of ammonia at Zingst (DE0009R) using denuder. These measurements are gathered as a part of the following projects EMEP, HELCOM and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ammonia in air (mole_fraction_of_ammonia_in_air), ammonia in air (mass_concentration_of_ammonia_expressed_as_nitrogen_in_air)