Seabed Sediment Thickness

"Knowledge of terrestrial and marine sediment thickness is critical to understanding geological evolution and processes. Globally, erosion and biogenic sedimentation followed by transport and deposition by wind or water determines the first-order structure of sedimentary accumulation. Subsequently, sediments can be tectonically deformed, redeposited or even subducted and therefore enter the deep-Earth cycle." (1) Total Sediment Thickness of the World's Oceans and Marginal Seas - Version 3 (GlobSed) NCEI's global ocean sediment thickness grid of Divins (2003) updated by Whittaker et al. (2013) has been updated again for the NE Atlantic, Arctic, Southern Ocean, and Mediterranean regions. The new global 5‐arc‐minute total sediment thickness grid, GlobSed, incorporates new data and several regional oceanic sediment thickness maps, which have been compiled and published for the, (1) NE Atlantic (Funck et al., 2017; Hopper et al., 2014), (2) Mediterranean (Molinari & Morelli, 2011), (3) Arctic (Petrov et al., 2016), (4) Weddell Sea (Huang et al., 2014), and (5) the Ross Sea, Amundsen Sea, and Bellingshausen Sea sectors off West Antarctica (Lindeque et al., 2016; Wobbe et al., 2014). This version also includes updates in the White Sea region based on the VSEGEI map of Orlov and Fedorov (2001). GlobSed covers a larger area than NCEI’s previous global grids (Divins, 2003; Whittaker et al. 2013), and the new updates results in a 29.7% increase in estimated total oceanic sediment volume. Source 1. DOI: 10.1029/2018GC008115陆地与海洋沉积物厚度的相关认知，是理解地质演化过程与机制的关键所在。全球范围内，侵蚀作用与生物沉积作用经风力或水体搬运、沉积后，共同塑造了沉积堆积的一级宏观格局。后续沉积物可经历构造变形、再沉积，甚至发生俯冲作用，进而进入地球深部循环。（1）全球海洋及边缘海总沉积物厚度数据集——第3版（GlobSed）：由Divins（2003年）编制、Whittaker等人（2013年）更新的美国国家环境信息中心（National Centers for Environmental Information, NCEI）全球海洋沉积物厚度网格数据，此次又针对东北大西洋、北极、南大洋及地中海区域完成了新一轮更新。 这款全新的全球5角分分辨率总沉积物厚度网格数据集GlobSed，整合了多份已公开的区域海洋沉积物厚度图与新观测数据，涵盖以下区域：(1) 东北大西洋（Funck等，2017；Hopper等，2014）；(2) 地中海（Molinari与Morelli，2011）；(3) 北极海域（Petrov等，2016）；(4) 威德尔海（Huang等，2014）；(5) 南极西部周边的罗斯海、阿蒙森海与别林斯高晋海区域（Lindeque等，2016；Wobbe等，2014）。 本版数据集还基于Orlov与Fedorov（2001年）编制的全俄地质科学研究所（Vsesoyuznyy Nauchno-Issledovatel'skiy Geologicheskiy Institut, VSEGEI）地图，对白海区域的数据进行了更新。 GlobSed的覆盖范围较NCEI此前发布的全球网格数据集（Divins，2003；Whittaker等，2013）更广，此次更新后估算的全球海洋沉积物总体积增加了29.7%。 参考文献1：DOI: 10.1029/2018GC008115