Аннотация:We present the hierarchical approach to modeling the solar wind streams in the heliosphere and
its application to the rising phase of the solar cycle 24 (2009-2012). This approach integrates
various types of data into a single modeling system. The input data include parameters of
dierent kinds of solar wind sources, such as large coronal holes, small areas of open magnetic
elds near active regions and some sources associated with transient events. We use the EUV
solar images from dierent spacecraft and centered at dierent wavelengths, solar magnetograms
and catalogs of solar
ares. On the rst hierarchical level, a few simple model estimates the
solar wind speed from the input data of each type. On the second level of hierarchy, the
nal forecast of the solar wind velocity was combined from the obtained estimates with the
weights depending on the level of solar activity. The resulting values of the solar wind velocity
for dierent periods of solar cycle 24 were compared with the measurements at the ACE and
STEREO spacecrafts. Application of this method to simulation of the solar wind speed at
rising solar activity allows evaluating signicance of dierent kinds of the solar wind sources
and its dependence on solar activity. This method is suitable for handling heterogeneous data,
and the possibility to apply simple models allows easy interpretation of the obtained results.