SWG6: Space Climate: Radiation, Particles, & Responses
The HAO space climate working group studies the climatology of the geospace environment and the drivers and responses of the coupled Sun-Earth system. Its goal is to enable a better understanding and attribution of solar variability, its impact on the upper atmosphere and space climate, and its interaction with anthropogenic change from monthly to decadal and longer time-scales.
- Solar Modeling
- Solar Irradiance Modeling: Compute spectral solar irradiance from MHD solar models (VIS, IR). Construct a Grand Minimum irradiance scenario from physics-based model. Develop a more realistic treatment of the chromosphere/corona in the MURaM code (see SWG1, SWG2)
- Implement data assimilation in the MHD-SWT tachocline model capable to predict flux emergence and solar variability on time-scales varying from months to years (see SWG5)
- Solar and Heliospheric Observations
- Use historical and present synoptic data to determine periodicities and long-term variations in the solar atmosphere and solar wind, including patterns of activity (e.g., active longitudes) and possible solar cycle precursors (e.g. bright points)
- Solar Minimum Campaign: Continue legacy work on comparison of solar minima. Engage with the scientific community to organize observational campaigns for the coming solar minimum.
- Analyze IRIS MgII high spectral/spatial resolution data to identify sources of variability in the MgII index and improve empirical irradiance models (in collaboration with LASP)
- Revive PSPT to bring back photospheric/chrmospheric observations at MLSO aimed to understand solar irradiance (in collaboration with LASP)
- Geospace, Atmospheric, and Climate Modeling
- Enhance and expand atmospheric and geospace modeling capabilities for response to solar irradiance, geomagnetic disturbances, solar energetic particles, and atmospheric variability (see SWG4)
- Construct improved estimates of solar spectral irradiance to guide development of upper atmosphere and climate models.
- Investigate the whole-atmosphere and ionosphere response to solar variability and anthropogenic change (see SWG4)
- • Geospace/Upper/Lower Atmosphere Observations:
- Quantify changes due to solar variability to estimate anthropogenic effects throughout the atmosphere, ionosphere, and geospace using space- and ground-based data
- Investigate NOx dependence on particle and radiative forcing, and its solar cycle variability.
The NCAR Whole Atmosphere Community Climate Model–eXtended (WACCM-X)