EMAG2: A 2-arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, and marine magnetic measurements
EMAG2: A 2-arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, and marine magnetic measurements
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DOI：
10.1029/2009gc002471
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发表时间：
2009-08-07
影响因子：
3.5
通讯作者：
Tontini, F. Caratori
中科院分区：
文献类型：
--
作者：
Maus, S.;Barckhausen, U.;Tontini, F. Caratori
全球地磁异常网格(EMAG2)已经根据卫星、船舶和航空磁测量数据汇编而成。EMAG2是对我们之前的世界数字磁异常图候选网格的重大更新。分辨率从3角分提高到2角分，海拔高度从大地水准面以上5公里降低到4公里。此外，还包括陆地和海洋上的额外栅格和轨道线数据。只要有可能，就使用原始的船载和机载数据，而不是预编的海洋磁网格。在海洋地壳年龄模型的基础上，通过方向网格化和外推改进了海洋稀疏轨迹线之间的内插。最长的波长(>；330千米)被最新的CHAMP卫星磁场模型MF6取代。EMAG2可在http://geomag.org/models/EMAG2上获得，永久档案可在http://earthref.org/cgi-bin/er.cgi？S=erda.cgi？n=970上获得。
A global Earth Magnetic Anomaly Grid (EMAG2) has been compiled from satellite, ship, and airborne magnetic measurements. EMAG2 is a significant update of our previous candidate grid for the World Digital Magnetic Anomaly Map. The resolution has been improved from 3 arc min to 2 arc min, and the altitude has been reduced from 5 km to 4 km above the geoid. Additional grid and track line data have been included, both over land and the oceans. Wherever available, the original shipborne and airborne data were used instead of precompiled oceanic magnetic grids. Interpolation between sparse track lines in the oceans was improved by directional gridding and extrapolation, based on an oceanic crustal age model. The longest wavelengths (>330 km) were replaced with the latest CHAMP satellite magnetic field model MF6. EMAG2 is available at http://geomag.org/models/EMAG2 and for permanent archive at http://earthref.org/ cgi-bin/er.cgi?s=erda.cgi?n=970.