Overview:
===============================================================================

Valentina Aquila (valentina.aquila@nasa.gov) created the original files by joining 
S. Carn's database of explosive volcanic eruptions, and 
degassing volcanic emissions. The dataset is maintained by
Peter Colarco (peter.r.colarco@nasa.gov) and Fei Liu (fei.liu@nasa.gov).

Eruptive and persistent emisions data is currently available through 18 Mar 2025.

Persistent (i.e. degassing) only emissions are aslo present in the file:
so2_volcanic_emissions_CARN_v202401.degassing_only.rc

These .rc files are in the format:

  ###  LAT (-90,90), LON (-180,180), SULFUR [kg S/s], ELEVATION [m], CLOUD_COLUMN_HEIGHT [m]
  ### If elevation=cloud_column_height, emit in layer of elevation
  ### else, emit in top 1/3 of cloud_column_height
  volcano::
  50.170 6.850 3.587963e-03 600 600 
  45.780 2.970 3.587963e-03 1464 1464 
  42.170 2.530 3.587963e-03 893 893
  ...
  ::


References:
==============================================================================
Explosive volcanic emissions:

Simon Carn (2025), 
Multi-Satellite Volcanic Sulfur Dioxide L4 Long-Term Global Database V4, 
Greenbelt, MD, USA, 
Goddard Earth Science Data and Information Services Center (GES DISC), 
https://doi.org/10.5067/MEASURES/SO2/DATA405


Volcanic degassing and anthropogenic point SO2 emissions:

Vitali Fioletov, Chris A. McLinden, Debora Griffin, Ihab Abboud, Nickolay Krotkov, 
Peter J. T. Leonard, Can Li, Joanna Joiner, Nicolas Theys, and Simon Carn (2025). 
Multi-Satellite Air Quality Sulfur Dioxide (SO2) Database Long-Term L4 Global V2, 
Edited by Peter Leonard, Greenbelt, MD, USA, 
Goddard Earth Science Data and Information Services Center (GES DISC), 
https://doi.org/10.5067/MEASURES/SO2/DATA406