1. Lamont Doherty Earth Observatory of Columbia University; 109C Oceanography Building,; Palisades; New York; 10964; USA
2. Department of Geology and Geophysics, School of Ocean, Earth Science and Technology; University of Hawaii; Honolulu; Hawaii; 96822; USA
3. Geophysical Institute; University of Alaska; Fairbanks; Alaska; 99775; USA