Funding for this research was provided by:
Division of Atmospheric and Geospace Sciences (1435785)
Division of Atmospheric and Geospace Sciences (1460179)
Division of Atmospheric and Geospace Sciences (1433213)
National Aeronautics and Space Administration (NNX15AB87G)
National Aeronautics and Space Administration (NNX16AO04G)
NSFC (41131065)
NSFC (41574165)
Austrian Science Fund (V195-N16)
Article History
Received: 15 September 2016
Accepted: 3 April 2017
First Online: 10 April 2017
Disclosure of Potential Conflicts of Interest
: The authors declare that they have no conflicts of interest.