Total Sediment Thickness of the World's Oceans and Marginal Seas, Version 2

This data collection is associated with the publication: Whittaker, J. M., Goncharov, A., Williams, S. E., Müller, R. D., & Leitchenkov, G. (2013). Global sediment thickness data set updated for the Australian-Antarctic Southern Ocean. Geochemistry, Geophysics, Geosystems, 14(8), 3297-3305. doi: 10.1002/ggge.20181Publication AbstractThis update replaces the original Total Sediment Thickness of the World's Oceans & Marginal Seas (Divins, 2003). NGDC's global ocean sediment thickness grid (Divins, 2003) has been updated for the Australian-Antarctic region (60°-155°E, 30°-70°S). New seismic reflection and refraction data have been used to add detail to the conjugate Australian and Antarctic margins and intervening ocean floor where previously regional sediment thickness patterns were poorly known. On the margins, sediment thickness estimates were computed from velocity-depth functions from sonobuoy/refraction velocity solutions ground-truthed against seismic reflection data. For the Southeast Indian Ridge abyssal plain, sediment thickness contours from Géli et al. (2007) were used. The new regional sediment thickness grid was combined with NGDC's original ocean sediment thickness grid (Divins, 2003) to create an updated global grid of ocean sediment thickness. Even using the minimum estimates, sediment accumulations on the extended Australian and Antarctic continental margins are 2 km thicker across large regions and up to 9 km thicker in the Ceduna Basin compared to NGDC's original sediment thickness grid (Divins, 2003), which has been deprecated but is still available.Authors and InstitutionsJoanne M. Whittaker - EarthByte Research Group, School of Geosciences, The University of Sydney, Australia. ORCID: 0000-0002-3170-3935Alexey Goncharov - Geoscience Australia, Canberra, ACT, AustraliaR. Dietmar Müller - EarthByte Research Group, School of Geosciences, The University of Sydney, Australia. ORCID: 0000-0002-3334-5764Simon E. Williams - EarthByte Research Group, School of Geosciences, The University of Sydney, Australia. ORCID: 0000-0003-4670-8883German Leitchenkov - Research Institute for Geology and Mineral Resources of the World Ocean, St. Petersburg,RussiaOverview of Resources ContainedThis collection contains the updated Total Sediment Thickness of the World's Oceans & Marginal Seas, Version 2 grid. The grid has been updated in the Australian-Antarctic region.List of ResourcesNote: For details on the files included in this data collection, see “Description_of_Resources.txt”.Note: For information on file formats and what programs to use to interact with various file formats, see “File_Formats_and_Recommended_Programs.txt”.Global sediment thickness data (.nc, .txt, .tif, .kmz, .jpg, 257.2 MB)Data in this collection is also available from ngdc.noaa.gov/mgg/sedthick/index.htmlFor more information on this data collection, and links to other datasets from the EarthByte Research Group please visit EarthByteFor more information about using GPlates, including tutorials and a user manual please visit GPlates or EarthByte

本数据集关联的发表文献为：Whittaker, J. M.、Goncharov, A.、Williams, S. E.、Müller, R. D. 与 Leitchenkov, G.（2013）。《用于澳南极南大洋更新的全球沉积物厚度数据集》，刊载于Geochemistry, Geophysics, Geosystems，14卷第8期，页码3297-3305，DOI: 10.1002/ggge.20181。

出版物摘要
本次更新替代了原版《全球海洋及边缘海总沉积物厚度（Total Sediment Thickness of the World's Oceans & Marginal Seas）》（Divins, 2003）。美国国家地球物理数据中心（NGDC）的全球海洋沉积物厚度网格（Divins, 2003）已针对澳南极区域（东经60°-155°，南纬30°-70°）完成更新。
研究采用新的地震反射与折射数据，为共轭的澳大利亚、南极大陆边缘及其间的洋底补充了细节——此前该区域的沉积物厚度分布格局鲜为人知。在大陆边缘区域，沉积物厚度估算值基于声呐浮标/折射速度解的速度-深度函数计算得出，并通过地震反射数据完成实地校验。针对东南印度洋海岭深渊平原，研究采用了Géli等人（2007）提出的沉积物厚度等值线数据。
新的区域沉积物厚度网格与美国国家地球物理数据中心（NGDC）原版海洋沉积物厚度网格（Divins, 2003）合并后，得到更新后的全球海洋沉积物厚度网格。即便采用最低估算值，相较于已被弃用但仍可获取的NGDC原版沉积物厚度网格（Divins, 2003），扩展后的澳大利亚、南极大陆边缘的大范围区域沉积物堆积厚度增加了2千米，塞杜纳盆地（Ceduna Basin）的沉积物厚度最大增幅可达9千米。

作者及所属机构
乔安妮·M·惠特克（Joanne M. Whittaker）——澳大利亚悉尼大学地球科学学院EarthByte研究组，ORCID: 0000-0002-3170-3935
阿列克谢·贡恰罗夫（Alexey Goncharov）——澳大利亚堪培拉澳大利亚地质调查局（Geoscience Australia）
R·迪特马尔·米勒（R. Dietmar Müller）——澳大利亚悉尼大学地球科学学院EarthByte研究组，ORCID: 0000-0002-3334-5764
西蒙·E·威廉姆斯（Simon E. Williams）——澳大利亚悉尼大学地球科学学院EarthByte研究组，ORCID: 0000-0003-4670-8883
格尔曼·莱特琴科夫（German Leitchenkov）——俄罗斯圣彼得堡世界海洋地质与矿产资源研究所

数据集包含资源概览
本数据集包含更新后的《全球海洋及边缘海总沉积物厚度（Total Sediment Thickness of the World's Oceans & Marginal Seas）》第2版网格数据，该网格已针对澳南极区域完成更新。

资源列表
注：本数据集包含文件的详细信息，请参阅"Description_of_Resources.txt"。
注：关于文件格式及可用于处理各类文件格式的软件信息，请参阅"File_Formats_and_Recommended_Programs.txt"。
全球沉积物厚度数据（格式包括.nc、.txt、.tif、.kmz、.jpg，总大小257.2 MB）
本数据集的数据亦可通过ngdc.noaa.gov/mgg/sedthick/index.html获取。
如需了解本数据集的更多信息，以及获取EarthByte研究组的其他数据集，请访问EarthByte官网。
如需了解GPlates的使用方法（包括教程与用户手册），请访问GPlates官网或EarthByte官网。