Sea-ice HI-Photogrammetry Cape Evans (SIHIPCE) 2018-2019

Dataset collected during two field campaigns in the same Antarctic fast ice site (Cape Evans, November/December 2018-19) as part of the AGP and NZARI collaboration over the grant "On Thin Ice: An in situ surveillance system for sea-ice microbial communities". The fieldwork was designed to test the scientific potentials of the IMAS/AGP developed under-ice HI system for mapping temporally dynamic and spatially varying under-ice habitats. The dataset consists of 3 terabytes of HI data acquired both in-situ under a wide range of natural and manipulated light conditions, as well as ex-situ with data acquired using a newly developed ice core scanning approach. The in-situ data are in the form of scanned transects acquired with a HI system capturing transmitted natural sunlight while being deployed beneath sea-ice. The ex-situ data was collected using external light sources illuminating horizontal and vertical sections of extracted ice cores. The dataset includes auxiliary data such as RGB imagery, TriOS RAMSES under-ice irradiance, sky irradiance, and any other measurements or information required to process the data.Other auxiliary data collected include filtered samples of ice core sections for fluorometric Chlorophyll-a (Chl-a) extraction, pigment composition via HPLC (to be processed), and particulate absorption spectra. Media footage (e.g., under-ice ROV videography, under-ice 360 videos, campaign photography of the systems and science) is also included.The dataset includes pre-processed high-resolution under-ice imagery collected from the fast-ice zone using a Sony a6300 camera mounted on a custom under-ice sled system. The imagery was acquired to document the sea-ice underside and analyse spatial patterns associated with amphipod communities from a near-horizontal, grazer-level perspective (publications pending).

本数据集采集自同一南极固定冰站点（埃文斯角，2018-2019年11/12月）的两次野外考察，为AGP与NZARI基于资助项目"On Thin Ice: 海冰微生物群落原位监测系统"开展的合作研究内容。本次野外考察旨在测试由IMAS与AGP联合开发的冰下HI系统的科研应用潜力，该系统可用于绘制时空动态且空间异质性显著的冰下生境。数据集包含总计3TB的HI数据，采集场景涵盖多种自然光照与人工调控光照条件下的原位（in-situ）测量，同时包含利用全新开发的冰芯扫描方法获取的异位（ex-situ）数据。原位数据为搭载HI系统获取的扫描断面数据，该系统部署于海冰下方，可捕获透射的自然日光。异位数据则通过外部光源照射提取冰芯的水平与垂直切面采集得到。数据集还包含各类辅助数据，例如RGB影像、TriOS RAMSES冰下辐照度、天空辐照度数据，以及所有用于数据处理所需的其他测量项与相关信息。其余采集的辅助数据包括：用于荧光法提取叶绿素a（Chl-a）的冰芯切片过滤样本、经高效液相色谱（HPLC）分析的色素组成（待后续处理），以及颗粒吸收光谱数据。此外，数据集还涵盖各类媒体素材，例如冰下遥控无人潜水器（ROV）摄像资料、冰下360度全景视频，以及科考系统与科研活动的现场摄影作品。数据集包含利用搭载于定制冰下雪橇系统的Sony a6300相机，在固定冰区域采集的预处理高分辨率冰下影像。该影像数据旨在记录海冰下表面形态，并从近水平的植食者视角，分析与端足类（amphipod）群落相关的空间分布格局（相关学术论文待发表）。