Whaling ship logbooks hold clues to Arctic ice

Above, a portion of Whaler And Fishing Vessels Near The Coast Of Labrador by William Bradford, c. 1880. (Credit: via DcoetzeeBot/Wikimedia Commons)

Currently, the Arctic is warming twice as fast as the rest of the world. But what was the Arctic like before—when maritime explorers and whale hunters first ventured into its icy seas?

A citizen-science project called Old Weather is mining historic ships’ logs to get a unique peek at Arctic climate over the past two centuries.

A recent update expands the project to also include hundreds of whaling ships, whose logbooks are preserved and scanned into digital form from New England museums and libraries.

A January 1870 page from the log of the Trident, a whaling vessel that sailed out of New Bedford, Massachusetts. Volunteers transcribe the handwritten text for climate clues. (Credit: New Bedford Whaling Museum)

Until now, Old Weather has mined logbooks from historic federal ships’ logs, scanned in recent years at the National Archives in Washington, DC. The whaling ships will add a new source of data for conditions in Arctic Ocean waters.

If scientists could know more about Arctic climate of the past, they could better understand today’s changes, and use that knowledge to improve projections for the future.

Sea ice observations

“The whaling ships provide a rich resource for us to use for the region north of Bering Strait,” says project leader Kevin Wood, a research scientist at the Joint Institute for the Study of the Atmosphere and the Ocean, a partnership between the University of Washington and the National Oceanic and Atmospheric Administration.

“In some years there may have been 40 or 50 ships working in that sector of the Arctic.”

The commercial whaling boats recorded sea ice and weather data in more than 400 logbooks from voyages dating as far back as the 1840s, with most taking place from the mid-1800s to the early 1900s.

“They’re not doing the hourly instrumental weather that the federal ships did, but they talk about sea ice in a very thorough way,” Wood says. “We can get more than one ship at a time in one area. This will allow us to get a much better characterization of the sea ice and other environmental conditions, especially in the Pacific Arctic.”

Want to volunteer?

The data that Old Weather volunteer citizen scientists meticulously transcribe from the logbooks can drive climate and sea ice models to help understand changes and improve predictions.

Volunteers get to help solve a climate puzzle from far back before the satellite era. They also get to experience the firsthand accounts of the whalers as they pursued their quarry into perilous Arctic seas.

“These stories will provide the best historical documentation of the Arctic marine environment over the past two centuries that it is possible to assemble,” Wood says.

Including the new logbooks, the Old Weather effort has scanned more than 500,000 handwritten pages from historic ship logs, and Old Weather volunteers have so far transcribed almost 3 million historical weather records for use in climate and environmental research.

Learn more, or volunteer to transcribe, at whaling.oldweather.org.

Institutions that contributed logbooks include the New Bedford Whaling Museum, Providence Public Library, the Nantucket Historical Association, Martha’s Vineyard Museum, Mystic Seaport, and the New Bedford Free Public Library. Together these institutions hold the majority of US Arctic whaling logbooks still in existence, Wood says.

Source: University of Washington