IN2020_V08 Southern Ocean Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2020_V08 titled "SOLACE - Southern Ocean Large Areal Carbon Export: quantifying carbon sequestration in subpolar and polar waters". The voyage took place between December 5, 2020 and January 16, 2021, departing from Hobart (TAS) and arriving in Hobart (TAS). The purpose of this voyage was to meet the following aims of the Southern Ocean Large Areal Carbon Export (SOLACE) project: First, to improve water column measurement of the downward export flux of carbon of the biological pump using an integrated suite of new technological advances – from particle decomposition to mesopelagic vertical migrations. Second, to integrate these improved estimates of the functioning of the biological export with biooptical properties, used as proxies of biogeochemical (BGC) properties, and which can be remotely sensed using satellite sensors. A combination of conventional passive “ocean colour radiometry” and active “CALIOP” LIDAR (that ‘sees through clouds’ and also senses below the surface) will be validated on SOLACE to provide a comprehensive regional extrapolation of carbon export fluxes. Third, to cross-link larger scale estimates of the biological pump (termed the BGP – biological gravitational pump - in a Review paper at Nature by Boyd, Claustre, Levy, Siegel and Weber, under revision) with those of PIPs (Particle Injection Pumps, Boyd et al., 2019, Nature) such as the Mixed Layer Pump (Llort et al., 2018) than can be assessed using profiling biological-floats (i.e., BGC-ARGO) as part of the US S. Ocean SOCCOM mission (www.soccom.edu), as well as the individual programmes of France, Australia and others. Fourth, to link these S. Ocean findings with those of international programmes on this topic, working on N. Hemisphere analogues, via data synthesis and modelling (co-collaborator Dave Siegel, UCSB) to produce large areal maps of carbon export by both the BGP and PIPs. These programmes sit under the JETZON umbrella - http://jetzon.org/ . This dataset is published with the permission of CSIRO. Not to be used for navigational purposes. The dataset contains bathymetry grids of 10m to 210m resolution of the Southern Ocean produced from the processed EM122 and EM710 bathymetry data.

本图层组对应“探索者号”海洋调查船（RV Investigator）采集的多波束测深仪（multibeam echosounder）数据，该数据来自航次IN2020_V08，航次主题为"SOLACE - 南大洋大面积碳输出：量化亚极地与极地水域的碳封存"。本次航次于2020年12月5日至2021年1月16日开展，从塔斯马尼亚州霍巴特港出发并最终返回霍巴特港。

本次航次旨在达成南大洋大面积碳输出（SOLACE）项目的如下目标：其一，依托集成的一系列新技术进展——从颗粒分解到中层海洋生物垂直洄游研究，提升生物泵（biological pump）碳向下输出通量的水柱测量精度；其二，将优化后的生物输出功能估算结果与生物光学特性相结合，生物光学特性可作为生物地球化学（biogeochemical, BGC）特性的替代指标，并可通过卫星传感器实现遥感探测。本次SOLACE航次将对传统被动式“海洋色彩辐射测量”与主动式CALIOP激光雷达（LIDAR，可穿透云层并探测水下环境）的组合方案进行验证，以实现碳输出通量的区域性全面外推；其三，将生物泵的大尺度估算结果（Boyd、Claustre、Levy、Siegel与Weber在《自然》（*Nature*）期刊待审的综述论文中将其定义为生物重力泵（biological gravitational pump, BGP））与颗粒注入泵（Particle Injection Pumps, PIPs，Boyd等，2019，《自然》）的相关估算结果进行交叉关联，其中混合层泵（Mixed Layer Pump, Llort等，2018）可通过剖面式生物浮标（即BGC-ARGO）进行评估，该浮标是美国南大洋SOCCOM任务（www.soccom.edu）的组成部分，同时也纳入法国、澳大利亚等国的独立研究计划；其四，通过数据合成与建模（共同合作者Dave Siegel，加州大学圣巴巴拉分校），将南大洋的相关研究发现与针对北半球类似场景开展的同类国际研究计划相结合，最终生成生物重力泵与颗粒注入泵共同驱动的碳输出大面积分布图谱。上述研究计划均隶属于JETZON联盟（http://jetzon.org/）。

本数据集经澳大利亚联邦科学与工业研究组织（CSIRO）许可发布，不得用于导航用途。本数据集包含基于经过处理的EM122与EM710测深数据生成的南大洋海域水深网格，分辨率介于10米至210米之间。