
Photo: Alex Proimos, CC BY 2.0
A ground-breaking study suggests that bottom trawling, a fishing practice in which heavy nets are dragged along the seabed, may be releasing more than a billion metric tons of carbon every year, which is comparable to carbon dioxide produced by the entire aviation industry.
The carbon is released from the seabed sediment into the water, and can increase ocean acidification, as well as adversely affecting productivity and biodiversity, the study said. Marine sediments are the largest pool of carbon storage in the world.
The report – Protecting the global ocean for biodiversity, food and climate – is the first study to show the climate impacts of trawling globally. It also provides a blueprint outlining which areas of the ocean should be protected to safeguard marine life, boost seafood production and reduce climate emissions.
Iceberg A68a, once the world’s largest iceberg, is now gone, broken up into chunks too small to track. While the iceberg is recent history, scientists are still studying its impact.
In February 2021, researchers on the German research vessel 
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Congratulations to ex-Commodore
An updated repost — a look back at the twin miracles on the Hudson from thirteen years ago yesterday. On January 15, 2009,