Funding for this research was provided by:
NSF | Directorate for Geosciences (1355768)
NSF | Directorate for Geosciences (0424133)
NSF | Directorate for Geosciences (0728375)
NSF | Directorate for Geosciences (1256620)
NSF | Directorate for Geosciences (1431518)
Article History
Received: 10 September 2018
Accepted: 4 February 2019
First Online: 6 March 2019
Competing Interests
: The authors declare no competing interests.