摘要：We present a preliminary analysis of more than 50,000 km of aeromagnetic survey lines flown in the Arctic
Ocean, acquired in 2009 with an optically pumped scalar magnetometer as part of the airborne geophysical survey
‘LOMGRAV’. From the observations we removed main and magnetospheric fields as given by the CHAOS-3 field
model (Olsen et al., 2010) and remaining external fields as monitored by the Canadian magnetic observatory
Alert. The reduced data were levelled based on cross-over differences at line intersections. Finally, a grid was
computed, upward continued by 3500 m and compared with the EMAG2 grid (Maus et al., 2009), showing a
good general agreement but also areas with systematic differences. The obtained data are expected to be part of
the next version of the World Digital Magnetic Anomaly Map (WDMAM).
关键词：Aeromagnetic survey ;Arctic Ocean ;WDMAM ;Greenland ;Ellesmere Island
