English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

For the first time, a simulation incorporating tropospheric and stratosphericchemistry using the newly developed MECO(n) model system is performed.MECO(n) is short for MESSy-fied ECHAM and COSMO models nested <i>n</i> times. It features an online coupling of theCOSMO-CLM model, equipped with the Modular Earth Submodel System (MESSy)interface (called COSMO/MESSy), with the global atmospheric chemistry modelECHAM5/MESSy for Atmospheric Chemistry (EMAC). This online coupling allows aconsistent model chain with respect to chemical and meteorological boundaryconditions from the global scale down to the regional kilometre scale.  A MECO(2) simulation incorporating one regional instance over Europe with50 km resolution and one instance over Germany with 12 km resolution isconducted for the evaluation of MECO(n) with respect to troposphericgas-phase chemistry. The main goal of this evaluation is to ensure that thechemistry-related MESSy submodels and the online coupling with respect tothe chemistry are correctly implemented. This evaluation is a prerequisitefor the further usage of MECO(n) in atmospheric chemistry-related studies.Results of EMAC and the two COSMO/MESSy instances are compared withsatellite, ground-based and aircraft in situ observations, focusing onozone, carbon monoxide and nitrogen dioxide. Further, the methane lifetimes inEMAC and the two COSMO/MESSy instances are analysed in view of thetropospheric oxidation capacity. From this evaluation, we conclude that thechemistry-related submodels and the online coupling with respect to thechemistry are correctly implemented. In comparison with observations, bothEMAC and COSMO/MESSy show strengths and weaknesses. Especially in comparisonto aircraft in situ observations, COSMO/MESSy shows very promising results.However, the amplitude of the diurnal cycle of ground-level ozonemeasurements is underestimated. Most of the differences between COSMO/MESSyand EMAC can be attributed to differences in the dynamics of both models,which are subject to further model developments

The 1-way on-line coupled model system MECO(n) – Part 4: Chemical evaluation (based on MESSy v2.52)