CORHEL: A Modeling Suite for Describing the Solar Corona and Inner Heliosphere

Details CORHEL: A Modeling Suite for Describing the Solar Corona and Inner Heliosphere CORHEL: A Modeling Suite for Describing the Solar Corona and Inner Heliosphere

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa43a1612l&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SA43A-1612

Astronomy and Astrophysics

Astrophysics

[2169] Interplanetary Physics / Solar Wind Sources, [7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7959] Space Weather / Models

Scientific paper

The Sun and its activity is the ultimate driver of space weather at Earth. The ambient solar corona and solar wind plays a key role in transmitting solar activity to the Earth's space environment. Coronal mass ejections (CMEs) propagate and interact with the ambient solar wind; their geoeffectiveness is affected by this interaction. The connection of the ambient interplanetary magnetic field to CME-related shocks and impulsive solar flares determines where solar energetic particles propagate. The partitioning of the ambient solar wind into fast and slow streams is responsible for recurrent geomagnetic activity. CORHEL - for Corona-Heliosphere - is a coupled set of models and tools for quantitatively modeling the ambient solar corona and solar wind in various approximations. It includes two coronal models (the MHD model MAS, and a new implementation of the empirical WSA model) and two heliospheric models (the MHD model Enlil and a heliospheric version of MAS). The primary data input to CORHEL consists of maps of the Sun's photospheric magnetic field derived from magnetograms; data from 6 different observatories can be downloaded and processed. CORHEL solutions are available to the community at the CCMC (http://ccmc.gsfc.nasa.gov) and the Predictive Science web sites (http://www.predsci.com). In this talk we describe progress in CORHEL development and the challenges that remain for transitioning modeling of the ambient corona and solar wind to an operational environment. CORHEL is supported by CISM and the LWS Strategic Capabilities Program (NASA, NSF, and AFOSR).

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