Local Organisation:

Jennifer Zaugg

Telephone +41 31 631 48 96

Fax +41 31 631 48 97



Computer Administrator:

Saliba F. Saliba



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The goal of the Workshop is to assess the current state of our understanding of the spatial and temporal variations of galactic and anomalous cosmic rays in the heliosphere, and their relation to effects of the Sun. Since the last workshop oncosmic rays in the heliosphere, one solar cycle ago, observations and theory have led to much-improved understanding. Observations in the heliosheath and in abroad range of heliographic latitudes in the inner heliosphere have provided important new information on the global structure of the heliosphere, its time variations and the resulting effects on cosmic rays. The workshop aims at improving our understanding of the key physical mechanisms through which the Sun controls the spatial and temporal variations of cosmic rays. The recent, unusually long-lasting solar minimum also offers a unique opportunity to study into the physics how cosmic-ray modulation operates. This has the potential of significantly improving our understanding of the long-term variation of cosmic rays and therefore to unravel the past behavior of our Sun, and possibly, climate.

The main objective is to understand the spatial and temporal variation of galactic and anomalous cosmic rays in the light of recent observations, theory and modeling:

Identify the key mechanism(s) of cosmic ray modulation and how changes on the Sun relate to changes in the observed characteristics of cosmic rays in the heliosphere.

Examine the current long-lasting solar minimum and understand its implications for solar-cycle variations and long-term variations.

Interpretation of long term variations of cosmogenic radionuclides in terms of solar variability and climate change on Earth.


Workshop Convenors

Jürg Beer, EAWAG, Dübendorf, Switzerland
Bernd Heber, Univ. of Kiel, Germany
Randy Jokipii, Univ. of Arizona, Tucson, USA
Jozsef Kota, Univ. of Arizona, Tucson, USA
Frank McDonald, Univ. of Maryland College Park, USA
Harm Moraal, Potchefstroom University, South Africa
Rudolf von Steiger, ISSI, Switzerland, Email:








last update 16 April 2010