Magnetic susceptibility record from the Faroe-Shetland Channel (40-32 ka b2k)

Here we present a low field magnetic susceptibility record from marine sediment core MD99-2284, for the age model of Core MD99-2304 (https://doi.pangaea.de/10.1594/PANGAEA.971113). Core MD99-2284 was retrieved from the Faroe-Shetland Channel (62°22'28.80N, 0°58'48.60W) with piston corer at 1500m water depth during cruise Marion Dufresne IMAGES 5 1999 leg MD114. This dataset covers an interval between 40 and 32 ka b2k during MIS 3. The age model of MD99-2284 was constrained by tunning the anhysteretic remanent magnetization to the NGRIP δ18O and then by targeted high-resolution identification of cryptotephra (Dokken et al. (2013,doi:10.1002/palo.20042); Sadatzki et al. (2019,doi:10.1126/sciadv.aau6174 ); Berben et al. (2020, doi:10.1016/j.quascirev.2020.106277)).The volume low field magnetic susceptibility (Κlf) of MD99-2284 was measured at the paleomagnetic laboratory at the LSCE in Gif-sur-Yvette. Measurements were done every 2 cm on u-channels, using a Bartington sensing coil with about 5.5 cm diameter. The Κlf is presented as Κlf (10-6 SI).

本研究提供了用于MD99-2304岩芯年代模型的海洋沉积物岩芯MD99-2284的低场磁化率记录，相关数据集DOI为https://doi.pangaea.de/10.1594/PANGAEA.971113。MD99-2284岩芯于1999年Marion Dufresne号考察船IMAGES 5航次MD114站位，在水深1500米处使用活塞取样器采集自法罗-设得兰海峡（62°22′28.80″N，0°58′48.60″W）。本数据集覆盖深海氧同位素3期（Marine Isotope Stage 3, MIS 3）内40~32 ka b2k的沉积时段。MD99-2284岩芯的年代模型通过将非滞剩磁（anhysteretic remanent magnetization, ARM）调谐至北大西洋格陵兰冰芯项目（North Greenland Ice Core Project, NGRIP）的δ¹⁸O记录，随后结合靶向高分辨率隐火山灰（cryptotephra）识别进行约束（Dokken等，2013，DOI:10.1002/palo.20042；Sadatzki等，2019，DOI:10.1126/sciadv.aau6174；Berben等，2020，DOI:10.1016/j.quascirev.2020.106277）。MD99-2284岩芯的体积低场磁化率（Κlf）测量工作于吉夫河畔伊维特的气候与环境科学实验室（Laboratoire des Sciences du Climat et de l'Environnement, LSCE）古地磁实验室完成。测量采用直径约5.5厘米的巴丁顿（Bartington）感应线圈，在U型沉积物样槽上以2厘米间隔进行。体积低场磁化率（Κlf）以10⁻⁶国际单位制（International System of Units, SI）为单位进行表述。