Magnetic Cloud Bz solar cycle variation and the space weather implications

Yan Li, University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, Janet G Luhmann, Space Sciences Laboratory, University of California Berkeley, Berkeley, United States, Lan Jian, NASA Goddard Space Flight Center, Greenbelt, MD, United States and Christopher T Russell, University of California, IGPP/EPSS, Los Angeles, CA, United States