CLOUD STRUCTURE + CLOUD FORMATION (METEOROLOGY); SPRAY + AEROSOLE (METEOROLOGIE); ECHAM, GLOBAL ATMOSPHERIC MODEL (METEOROLOGIE); CLIMATE MODELS + PROXY DATA (CLIMATOLOGY); ECHAM, GLOBAL ATMOSPHERIC MODEL (METEOROLOGY); METEOROLOGISCHE MODELLE; METEOROLOGICAL MODELS; CHEMICAL REACTIONS IN THE ATMOSPHERE (METEOROLOGY); WOLKENSTRUKTUR + WOLKENBILDUNG + WOLKENAUFLÖSUNG (METEOROLOGIE); SPRAY + AEROSOLS (METEOROLOGY); CHEMISCHE REAKTIONEN IN DER ATMOSPHÄRE (METEOROLOGIE); KLIMAMODELLE + PROXY DATA (KLIMATOLOGIE)