The registration for the 8th HEPPA-SOLARIS workshop (8-10 June, 2020) is now open. For more information see​

The workshop will focus on observational and modeling studies of the influences of solar radiation and energetic particle precipitation on the atmosphere and climate.

Important deadlines:
March 20: "Early Bird" discounted registration fee
March 20: Travel support application
April 24:...Read more



  • October 2018:
    • SPARC General Assembly 2018,
  • ...Read more

RAISE/SOLARIS-HEPPA Meeting Nov 3-6 2015

This is the first announcement of the upcoming SPARC SOLARIS-HEPPA working group meeting to be held on November 3-6th, 2015 in Boulder in conjunction with the RAISE project meeting. Meeting dates will be Tuesday, 3 November for RAISE, and Wed-Fri, 4-6 November for HEPPA-SOLARIS. Topics to be addressed at the SOLARIS-HEPPA working group meeting will include:

  1. Coordination of CCMI analysis: evaluation of solar signals in CCMI (and related) hindcast simulations and satellite observations including the assessment of analysis tools,
  2. ...Read more


All presentations that have been provided to us are available as a single zip file (315MB) 

Files are named lastname_solarisheppa2017.[pptx,pdf]

SPARC SOLARIS-HEPPA working group meeting Paris 2017

The aim of this meeting is to present and discuss preliminary results of the five new working groups (WGs) that were defined at SOLARIS-HEPPA meetings in 2016 (

SPARC SOLARIS-HEPPA Working Group Meeting 18-19 September 2019, Granada/Spain


The meeting focuses (but is not limited to) results of the five SOLARIS-HEPPA working groups  (

  • WG1 (Stratospheric Signal): Analysis of the solar irradiance and particle effects on the stratosphere in both historical (1960-2010) (or REF-C1) and future (2010-2100) (or REF-C2) simulations of the Chemistry Climate Model Initiative (CCMI) simulations.
  • WG2 (Surface Signal
  • ...Read more