美国乔治梅森大学张捷教授学术报告

地点：四楼学术报告厅

Time: 10:10 - 11:30AM, July 22

Title: Observations and Physical Mechanisms of Solar Eruptions.

Spearker: Prof. Dr. Jie Zhang

School of Physics, Astronomy and Computational Sciences, George Mason University, 4400 University Dr., MSN 6A2, Fairfax, VA 22030, USA

Abstract: Solar eruptions, in the form of solar flares and coronal mass ejections (CMEs), are the most energetic phenomena in the solar system. Solar eruptions are also the driver of severe space weather that may affect satellite operation, communication, navigation and other advanced modern technological systems. Thus, the research of solar eruptions is not only of great scientific interest, but also has importance practical purposes. I will present the state-of-the-art observations of solar eruptions from SDO, STEREO and SOHO spacecraft. I will further discuss the physical mechanisms of solar eruptions, with a focus on the two contrasting paradigms: the non-ideal MHD process of magnetic reconnection versus the ideal process of flux rope instability. The dynamic and thermal properties of flux ropes will be presented in detail. The observations and theory regarding the CME propagation in the interplanetary space will also be discussed.

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Name: Jie Zhang

Professional Preparation:

 Post-Doc Naval Research Lab, 2000-2002

 Ph.D. Astrophysics, University of Maryland, 1999

 M.S. Astrophysics, Purple Mountain Obs., Chinese Academy of Science, 1993

 B.S. Astronomy, Nanjing University, China, 1990

Professional Experience:

2009 Aug – present:Associate Professor, George Mason University

2006 Oct-2008 Oct:Director, Space Weather Lab at George Mason University.

2005 Aug-2009 Aug:Assistant Professor, George Mason University

2000 Jun-2005 Aug:Assistant research scientist, George Mason University.

2000 Jan-2002 Jun: Post-doctoral researcher at Naval Research Laboratory

1997 Aug-1999 Dec: Graduate research assistant, University of Maryland

1995 Aug-1997 Aug: Graduate teaching assistant, University of Maryland.

1993 Jul-1995 Jul: Research associate, Purple Mountain Observatory, Chinese Academy of Science.

Honors and Awards

 2013: George Mason University College of Science Publication Award

 2013: Guest Professor at University of Science and Technology of China

 2012: Xiyuan Chair Professor at Nanjing University, China

 2012: Sigma Xi Honor Society

 2011: Kavli Fellow

 2009: Outstanding Young Scholar Award (Overseas) from Chinese National Science Foundation

 2008: National Science Foundation CAREER Award

 1999: Phi Kappa Phi honor Society

 1997: Solar Physics Division of American Astronomical Society Studentship Award

Research Grants:

Since year 2002, Dr. Jie Zhang has successfully obtained fifteen research grants. These grants are mainly sponsored by National Science Foundation (NSF) and National Aeronautic and Space Administration (NASA), including the prestigious Faculty Early Career Development Program (CAREER) award from NSF. Among these grants, I am the principle investigator of 14 grants and co-investigator of one grant.

Publications:

I have authored and co-authored 57 refereed papers in total, and 18 of them are of first-author. Among these, 55 are in scientific journals, and 2 in conference preceding.

According to Web of Knowledge Citation Report, the citation number of my papers is 1352, with an average citation per item of 27.04 (based on 50 results found by WOK). My h-index is 19.

Research Interests

In addition to teaching and training, I am dedicated to research work in the areas of solar physics and space weather. I am interested in understanding the physical mechanisms of solar flares and coronal mass ejections (CMEs), the two most energetic phenomena occurring on the Sun but affecting the environment throughout the entire solar system, including the space near the Earth, Moon and Mars. I am also interested in characterizing the propagation of these eruptions across the integrated Sun-Earth system with the aim of providing accurate prediction of space weather. My research work not only addresses fundamental physics problems, such as plasma instability, magnetic reconnection and magnetism in general, but also help societal needs of mitigating adverse space weather effects on human space exploration, robotic satellite operation, communication and navigation.