Southern Ocean sea ice, icebergs, and meteorological data from maritime sources for the period 1929 to 1940
2024
Dmitry V. Divine | Svetlana Divina | Ole Edvard Bjørge | Elisabeth Isaksson | Harald Dag Jølle | Ivar Stokkeland | Mariela Vasquez Guzman | Sally Wilkinson | Clive Wilkinson
Abstract Maritime historical documentary sources of weather and state of sea surface including sea ice can aid in filling a known climate knowledge gap for the Southern Ocean and Antarctica for the first half of the 20th century. This study presents a data set of marine climate, sea ice and icebergs recovered from a collection of logbooks from mainly Norwegian whaling factory ships that operated in the Southern Ocean during 1929–1940. The data set comprises some 8000 weather and 4000 sea ice/open sea records from austral summers of the study period. This paper further discusses the structure and content of most common Norwegian maritime documentary sources of the period along with the practices of logging information relevant for the study, such as time keeping, positioning and making weather observations. An emphasis was made on recovery of notes on sea ice and icebergs and their interpretation in terms of WMO categories of sea ice concentration. Data, including ship‐related metadata from all individual documents are homogenized and structured to a common machine‐readable format that simplifies its ingestion into relevant climate data depositories.
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