1 / 8

Detection of Upper-Level SO2 using GOES Sounder: Advancements in Monitoring Ash and SO2

The study explores utilizing the GOES Sounder for detecting upper-level sulfur dioxide (SO2) emissions. By leveraging specific infrared channels, the researchers were able to measure SO2 absorption at higher atmospheric levels, above 3 km. The technique involves comparing brightness temperatures between the SO2 absorption channel and a reference channel to accurately estimate SO2 concentrations. Initial results from the study indicate promising capabilities of the GOES Sounder in monitoring Upper Troposphere Lower Stratosphere SO2 levels. However, further research is needed to validate and optimize reference channels for improved SO2 detection. The findings suggest that the enhanced temporal resolution of the ABI instrument will enable more precise monitoring of SO2 and volcanic ash emissions in the future, ushering in new possibilities for environmental monitoring.

hashim-powers
Télécharger la présentation

Detection of Upper-Level SO2 using GOES Sounder: Advancements in Monitoring Ash and SO2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Detection of upper level SO2 via the GOES Sounder Fred Prata1, Anthony Schreiner2, Gary Ellrod3 and Timothy Schmit4 1CSIRO Atmospheric Research, Australia 2Cooperative Institute for Meteorological Satellite Studies (CIMSS) University of Wisconsin-Madison Madison, WI 53706, U.S.A. 3NOAA/NESDIS, Office of Research and Applications Camp Springs, Maryland 4NOAA/NESDIS, Office of Research and Applications Madison, WI 53706, U.S.A. 2nd International Conference on Volcanic Ash and Aviation Safety Alexandria, VA.

  2. The GOES Sounder

  3. The GOES Sounder

  4. SO2 from GOES • Infrared channel near 7.3 µm SO2 absorption (channel 11) • Reference channel (channel 9) • Upper-level SO2 only (>3 km) • Example – Montserrat

  5. Absorption measurement. GOES channel 11 brightness temperatures are colder than expected, because of the presence of SO2. Reference channel. A second channel is used to eliminate background effects. The O3 channel was used (channel 9). Brightness temperature difference (DBT). The DBT is related to transmittance and then to absorber amount through radiative transfer modelling. SO2 Retrieval from Sounder Data

  6. GOES-12 SO2 retrieval using the ozone channel as reference

  7. Montserrat TOMS GOES HYSPLIT AIRS JULY 13, 2002

  8. It appears that the GOES sounder is capable of detecting Upper Troposphere Lower Stratosphere SO2. Unprecedented temporal resolution heralds new possibilities for monitoring SO2 and ash. Changes to the ABI will permit purposeful SO2 detection using the 7.3 µm channel. More work is required to validate the SO2 retrievals and to find the ‘optimum’ reference channels. Conclusions

More Related