International Bathymetric Chart of the Arctic Ocean (IBCAO)

The International Bathymetric Chart of the Arctic Ocean (IBCAO) is a bathymetry map detailing the seafloor depth in the Arctic ocean at a resolution of 200 × 200 metres.

Bathymetry is significant for a multitude of marine scientific studies. Since 1997, the International Bathymetric Chart of the Arctic Ocean (IBCAO) has been the authoritative source of bathymetry for the Arctic Ocean. A broad range of Arctic climate and environmental research, including questions on the declining cryosphere, the pathways of ocean currents and, thus, the distribution of heat, sea-ice decline, the effect of inflowing warm waters on tidewater glaciers, the stability of marine-based ice streams and outlet glaciers grounded on the seabed, and the geological history of the Arctic Basin, require knowledge of the depth and shape of the seafloor.

The bathymetry map covers the Arctic Ocean. The source data used to compile the map is collected over many decades, spanning from at least the 1950s to the 2020s and is acquired using several measuring methods, e.g. multi- and single-beam echo sounders. The direct measurements are sparse, hence also indirect measurements have been used such as contours and soundings digitised from depth charts.

国际北极海洋深度图（IBCAO）是一幅详尽描述北极海洋海底深度的地形图，其分辨率达到200×200米。地形学在众多海洋科学研究中占据重要地位。自1997年以来，国际北极海洋深度图（IBCAO）已成为北极海洋地形学的权威资料来源。包括对冰川退缩、海洋流路径及其热量分布、海冰减少、流入暖水对冰川前缘的影响、以海洋为基座的冰流和海底冰川出口的稳定性，以及北极盆地的地质历史等广泛的北极气候和环境研究问题，均需要掌握海底的深度与形状信息。
该地形图覆盖了整个北极海洋。用于编制地图的原始数据收集跨越数十年，从至少20世纪50年代至21世纪20年代不等，并采用了多种测量方法，例如多波束和单波束回声测深仪。直接的测量数据较为稀疏，因此还使用了如从深度图数字化而来的等深线和测深线等间接测量数据。