Hyperspectral Sounder Stratospheric Ozone Intrusion Forecast
and Analysis Software Package Version 1.0 release 20 May 2014
A globally configurable software package that creates 48 hour 3 dimensional
trajectory forecasts of stratospheric ozone intrusions. Hyperspectral
Regression Ozone Profile Retrievals are used to identify regions of
high ozone concentrations (>80 ppb) below 500 hPa, and then a trajectory
model is run to forecast the horizontal and vertical movement of the
ozone over the next 48 hours. The IDEA-I ozone intrusion software identifies regions of stratospheric intrusions, where stratospheric air descends into the troposphere due to tropopause folding events. These events are most likely to occur during the winter/spring months in the case of jet streams at the base of very strong low pressure systems and are most likely to influence surface ozone in regions of elevated terrain.
The hyperspectral instruments supported are:
IDEA-I: Infusing satellite Data into Environmental Applications - International
The output products consist of both netCDF data files as well as hourly
trajectory forecast images, which can be viewed as animations from a
web browser using the PHP software that is included as part of this package.
The images show the movement of the ozone color coded by the difference in
the height of the forecast ozone trajectory and the height of the surface
in hPa. Areas where the stratospheric ozone is forecast to affect the
surface will appear as trajectories shaded pink
- Aqua Atmospheric Infrared Sounder (AIRS),
- Suomi-NPP Cross-track Infrared Sounder (CrIS), and/or
- MetOP Infrared Atmospheric Sounding Interferometer (IASI) instrument
To view your IDEA-I website and animations from a web browser, a web server
must be running on your computer. An example IDEA-I ozone web implementation
over the USA can be viewed at: http://cimss.ssec.wisc.edu/idea-i/USozone/.
Complete installation and run instructions are included with the release. The IDEA-I software package was developed from the original IDEA package used by United States Air Quality forecasters. For more information on the development and use of IDEA, please see:
- CentOS6 64-bit and compatible systems running Intel Linux,
- A reliable and efficient internet connection to download the required
ancillary data consisting of Global Forecast System (GFS) numerical weather
prediction files (approx. 400MB per day). The downloads are done
automatically as part of the IDEA-I execution. Both the IDEA-I MODIS aerosol and
IDEA-I hyperspectral sounder ozone trajectory forecasts require the same ancillary
files; if you are using both software packages, this download is required
only once per day.
Al-Saadi, J. A. et al., 2005: Improving National Air Quality Forecasts with Satellite Aerosol Observations, BAMS, DOI:10.1175/BAMS-86-9-1249.