Abstract. In order to investigate the impact of spatial resolution on discrepancy between simulated δ18O and observed in Greenland ice cores, regional climate simulations are performed with isotope-enabled model (RCM) COSMO_iso. For this purpose, general circulation (GCM) ECHAM5-wiso under present-day conditions MPI-ESM-wiso GCM mid-Holocene dynamically downscaled COSMO_iso for Arctic region. T...

In May 2008, the measurement campaign IMPACT for observation of atmospheric aerosol and cloud properties was conducted in Cabauw, The Netherlands. With a nudged version of the coupled aerosol-climate model ECHAM5-HAM we simulate the size distribution and chemical composition of the aerosol and the associated aerosol optical thickness (AOT) for the campaign period. Synoptic scale meteorology is ...

All existing 10Be records from Greenland and Antarctica show increasing concentrations during the Maunder Minimum period (MM), 1645–1715, when solar activity was very low and the climate was colder (little ice age). In detail, however, the 10Be records deviate from each other. We investigate to what extent climatic changes influence the 10Be measured in ice by modeling this period using the ECH...

Abstract. The COVID-19 (coronavirus disease 2019) European lockdowns have led to a significant reduction in the emissions of primary pollutants such as NO (nitric oxide) and NO2 (nitrogen dioxide). As most photochemical processes are related nitrogen oxide (NOx≡ + NO2) chemistry, this event has presented an exceptional opportunity investigate its effects on air quality secondary pollutants, tro...

Abstract. Formaldehyde (HCHO), hydrogen peroxide (H2O2) and organic hydroperoxides (ROOH) play a key role in atmospheric oxidation processes. They act as sources sinks for HOx radicals (OH + HO2), with OH the primary oxidant that governs self-cleaning capacity. Measurements of these species allow evaluation chemistry-transport models which need to account multifarious source distributions, tran...