Description and evaluation of the tropospheric aerosol scheme in the Integrated Forecasting System (IFS-AER, cycle 47R1) of ECMWF
<p>This article describes the Integrated Forecasting System aerosol scheme (IFS-AER) used operationally in the IFS cycle 47R1, which was operated by the European Centre for Medium Range Weather Forecasts (ECMWF) in the framework of the Copernicus Atmospheric Monitoring Services (CAMS). It repr...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2022-06-01
|
| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/15/4881/2022/gmd-15-4881-2022.pdf |
| Summary: | <p>This article describes the Integrated Forecasting System aerosol scheme (IFS-AER) used operationally in the IFS cycle 47R1, which was operated by the European
Centre for Medium Range Weather Forecasts (ECMWF) in the framework of the Copernicus Atmospheric Monitoring Services (CAMS). It represents an update
of the <span class="cit" id="xref_text.1"><a href="#bib1.bibx60">Rémy et al.</a> (<a href="#bib1.bibx60">2019</a>)</span> article, which described cycle 45R1 of IFS-AER in detail. Here, we detail only the parameterisations of sources and sinks that
have been updated since cycle 45R1, as well as recent changes in the configuration used operationally within CAMS. Compared to cycle 45R1, a
greater integration of aerosol and chemistry has been achieved. Primary aerosol sources have been updated, with the implementation of new dust and
sea salt aerosol emission schemes. New dry and wet deposition parameterisations have also been implemented. Sulfate production rates are now
provided by the global chemistry component of IFS. This paper aims to describe most of the updates that have been implemented since cycle 45R1,
not just the ones that are used operationally in cycle 47R1; components that are not used operationally will be clearly flagged.</p>
<p>Cycle 47R1 of IFS-AER has been evaluated against a wide range of surface and total column observations. The final simulated products, such as
particulate matter (PM) and aerosol optical depth (AOD), generally show a significant improvement in skill scores compared to results obtained
with cycle 45R1. Similarly, the simulated surface concentration of sulfate, organic matter and sea salt aerosol are improved by cycle 47R1 compared to cycle 45R1. Some biases persist, such as the surface concentrations of nitrate and organic matter being simulated too high. The new wet and dry
deposition schemes that have been implemented into cycle 47R1 have a mostly positive impact on simulated AOD, PM and speciated aerosol surface
concentration.</p> |
|---|---|
| ISSN: | 1991-959X 1991-9603 |