Drift trajectory of the site M8 of the Distributed Network of MOSAiC 2019/2020@en

During the “Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC)” in 2019/2020 a Distributed Network (DN) of autonomous stations (buoys) was installed on the sea ice and drifted across the Arctic Ocean. This network consisted of >200 individual devices ranging from simple position buoys to complex and interdisciplinary multi-sensor platforms. Most (complex) measurements were performed on sea ice floes (sites or nodes) by co-located instruments. These sites were called medium (M) and large (L) sites. In addition, autonomous instruments were operated in the Central Observatory (CO), which consisted of the research ice breaker Polarstern and the adjacent ice camp. Initially, 4 L and 9 M sites were installed around the CO in a distance of up to 40 km. However, their distances and relative positions changed over time due to the drift of the ice pack over time. Over the course of the MOSAiC expedition, 3 different COs were established because of re-locations of RV Polarstern: CO1 started with the first drift of Polarstern on 04 October 2019; CO2 started with the second drift on 19 June 2020; and CO3 started with the third drift on 21 August 2020.2019/2020年北极气候研究多学科漂流观测站（Multidisciplinary drifting Observatory for the Study of Arctic Climate, MOSAiC）科考期间，研究团队在海冰上布设了一套自主观测站分布式网络（Distributed Network, DN），该网络随海冰漂流横跨北冰洋。该网络包含200余台独立观测设备，覆盖从简易定位浮标到复杂跨学科多传感器平台的全谱系装置。多数复杂观测任务由部署在海冰浮冰（点位或节点）上的协同同步仪器完成，这类点位被划分为中型（M）与大型（L）站点。此外，中央观测站（Central Observatory, CO）内部署了自主观测仪器，该观测站由破冰科考船“极星号（RV Polarstern）”及毗邻的冰上营地组成。科考初期，研究团队在中央观测站周边至多40公里范围内布设了4个大型站点与9个中型站点。但由于海冰群随时间持续漂移，这些站点的间距与相对位置亦随科考进程不断发生变化。在整个MOSAiC科考任务期间，因“极星号”科考船的多次重新部署，共计设立了3处中央观测站：CO1始于2019年10月4日“极星号”首次破冰漂流；CO2始于2020年6月19日的第二次漂流；CO3始于2020年8月21日的第三次漂流。