Frequently asked questions AeroCom

on AeroCom Web Interface and Catalogue

Known bugs/problems/wishes

-mountain sites are compared from surface level model output, use relative height

Standard statistics?

Visible on the SCATTERLOG plot Example) and in SCORE pot Example

Share with colleague? Report Error?

To share what you see on the aerocom webinterface with a colleague, click on mail-share button upper right, (should open an email with URL link) or click on Button “Show URL link to current”, below images, and copy link from popup window appearing. Use this also to report errors to Michael.

Scroll through all options?

Select a menu and use left/right arrows on keyboard.

All Models / Stations for year XXXX?

Below the images there is a “Filter Models/Stations on year:” menu, which can be used to preselect the models or station time series plots to those from a given year.

Compare models synchron?

Use 2/4/6 panels, push “SYNCHRONISE PANEL” Example

Which data are used?

See for instance SITELOCATION plot Example and Time series plots Example

Which version of the data?

We get regularly, every 1-2 months a new update of data from eg Aeronet, EBAS. This might imply that the observational data have changed. You can check for the revision date below, left the time series images.

Table of all comparisons?

Not yet available, see graph type SCORE table plot.

Daily / Monthly?

Most plots are availabile per month, per season, monthly, yearly. Example

Bias on a map?

Use StatmapBias plots. Example

Difference to reference version?

DIFFMAP plots are available for some parameters.

Display two model versions

using two panels, use “synchronise panels” button to see corresponding images Example

Meaning of the variables

Long description is visible by hovering over menu ite, and - if the info text (appearing above image when hovering over image) is not hidden Example

Missing variable?

Not all variables make it sometimes into the AeroCom catalogue. If you have specific idea or request, send email to Michael with variable name.

3D diagnostics?

not yet implemented in standard AeroCom. To save space, ideally monthly 3D mixing ratios and profiles @stations (see HTAP-2 format and station list) can be output by the model. Ozone sondes and CALIOP profiles are candidates for near future standard diagnostics.

Which year is used?

The year in the menu refers to the observations year used and generally to the meteorology of that year. Year may be different in the model wrt to emissions. Also a model simulation of year x maybe be compared to year y in observations. A different year for the model shows up in eg y-axis of SCATTERLOG file. Note that 9999 is used for a climatology for either model or observations, typically comprising 5-10 years.

Is this public?

yes - all world can see version EMEP_svn4738_141231HF_SuperDuper .

Remove version?

Versions can be removed from website, but that requires email to Jan & Michael.

What means RMSspatial/temporal?

For daily data analysis, RMS is split into the “spatial” RMS, calculated from monthly/seasonal/yearly averages and the “temporal” RMS, which is the residual (RMS^2temp=RMS^2-RMS^2spatial)