BEDMAP3 - Ice thickness, bed and surface elevation for Antarctica - gridding products

We present here Bedmap3, the latest suite of gridded products describing surface elevation, ice-thickness and the seafloor and subglacial bed elevation of Antarctica south of 60degS. Bedmap3 incorporates and adds to all post-1950s datasets previously used for Bedmap1 and Bedmap2, including 84 new aero-geophysical surveys by 15 data providers, an additional 52 million data points and 1.9 million line-kilometres of measurement. This has filled notable gaps in East Antarctica, including the South Pole and Pensacola basin, Dronning Maud Land, Recovery Glacier and Dome Fuji, Princess Elizabeth Land, plus the Antarctic Peninsula, West Antarctic coastlines, and the Transantarctic Mountains. Our new Bedmap3/RINGS grounding line similarly consolidates multiple recent mappings into a single, spatially coherent feature. Combined with updated maps of surface topography, ice shelf thickness, rock outcrops and bathymetry, Bedmap3 reveals in much greater detail the subglacial landscape and distribution of Antarctica's ice, providing new opportunities to interpret continental-scale landscape evolution and to model in detail the past and future evolution of the Antarctic ice sheets. Sponsored by the Scientific Committee on Antarctic Research (SCAR), the Bedmap3 Action group aims to produce a new map and datasets of Antarctic ice thickness and bed topography for the international scientific community. The associated Bedmap datasets are listed here: https://www.bas.ac.uk/project/bedmap/#data

本文介绍Bedmap3——这套最新的网格化产品集，涵盖南纬60度以南南极洲的地表高程、冰厚、海底及冰下基岩高程数据。Bedmap3整合并扩充了此前Bedmap1与Bedmap2所使用的所有1950年后的数据集，其中包含15家数据供应商提供的84项全新航空地球物理勘测成果，额外新增了5200万个数据点与190万测线千米的测量数据。这填补了南极东部的多处显著数据空白，涵盖南极点与彭萨科拉盆地、毛德皇后地、恢复冰川（Recovery Glacier）、富士冰穹（Dome Fuji）、伊丽莎白公主地，以及南极半岛、西南极海岸线与横贯南极山脉。全新的Bedmap3/RINGS接地线（grounding line）同样将多项近期绘制的接地线成果整合为单一、空间上一致的统一特征。结合更新后的地表地形、冰架厚度、岩石露头与水深测绘图，Bedmap3得以更为细致地展现南极冰下地貌与冰体分布，为解析大陆尺度的地貌演化，以及精细化模拟南极冰盖的过去与未来演化进程提供了全新契机。由南极研究科学委员会（Scientific Committee on Antarctic Research, SCAR）资助的Bedmap3工作组，旨在为国际科学界打造一套全新的南极冰厚与基岩地形地图及数据集。相关Bedmap数据集的列表链接为：https://www.bas.ac.uk/project/bedmap/#data