Comparison of Antarctic iceberg observations by Cook in 1772–75, Halley in 1700, Bouvet in 1739 and Riou in 1789 with modern data

• Published in: Journal of Glaciology
• Main Authors: Seelye Martin, David G. Long, Michael P. Schodlok
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press 2023
• Subjects: Antarctic glaciology; icebergs; polar and subpolar oceans; Environmental sciences; GE1-350; Meteorology. Climatology; QC851-999; Antarctic; Amundsen Sea; Weddell; Amery; Amery Ice Shelf; Bouvet; Brigham; Thwaites Glacier; Alfred Wegener Institute; Antarc*; Ice Shelf; Iceberg*; Journal of Glaciology; Sea ice
• Online Access: https://doi.org/10.1017/jog.2022.111; https://doaj.org/article/fa1f9431747e4c7a91829bde59bbbbb4

During Cook's 1772–75 Antarctic circumnavigation on the HMS Resolution, he recorded the positions of hundreds of icebergs. This paper compares Cook's observations and those of Halley in 1700, Bouvet in 1739 and Riou in 1789, with the Brigham Young University/National Ice Center (BYU/NIC) and the Alfred Wegener Institute datasets. Cook's description of the iceberg plume east of the Amery Ice Shelf and the iceberg distributions in the Weddell, Ross and Amundsen Seas agree with modern data. In January 1774, Cook reached his farthest south on the shelf of the Amundsen Sea Embayment, the site of the current International Thwaites Glacier Collaboration field study. Cook's largest iceberg had a 2.5 km diameter, where power-law models show that icebergs of this size or smaller comprise 92% of their total number. In the eastern Weddell, Cook's observation of a sea-ice tongue with a much greater extent than in satellite imagery remains unexplained. Although Riou's icebergs lie 1000 km east of the BYU/NIC trajectories, application of the England and others (2020) fracture and drift model to the trajectories removes the discrepancy and means that all the ship observations are consistent with modern observations and theory.