We have known for decades that scientists can learn about local climate conditions by studying the growth rings in trees. Wide rings form in warmer years with more precipitation; thinner rings indicate a colder, dryer growing season; and scars provide evidence of external environmental factors, such as forest fires and insect infestations.

Corals, with their calcium carbonate skeletons and symbiotic photosynthetic algae, are among the first organisms to be negatively impacted by climate change. Warming waters cause coral to expel the algae, called zooxanthellae, while a gradually acidifying ocean, resulting from increased amounts of atmospheric carbon dioxide dissolved in the seawater, can weaken and even dissolve coral skeletons.

A team of technical divers and scientists, accompanied by an autonomous underwater vehicle (AUV) and molecular biology tools, will comprehensively map, photograph, and study part of Bermuda’s deepest reef system with funds from the Cawthorn Innovation Award, now in its third year of supporting the work of BIOS scientists.

During the last glacial period much of the Northern Hemisphere was blanketed by one or more sheets of ice.  Throughout this period, chunks of these continental ice sheets often broke off and surged into the North Atlantic, carrying with them large amounts debris and freshwater. These events, called Heinrich events, are often thought to have been responsible for changes in ocean circulation patterns; specifically, weakening the Atlantic Meridional Overturning Circulation (AMOC), a system of currents that transports water and heat from the Southern to the Northern Hemisphere in the Atlantic basin.

Growing up on his parent’s coffee farm in Brazil, Samuel Faria didn’t spend much time thinking about the ocean. In fact, he wanted to work with teenagers as a high school teacher or college professor. When he was 8, his family moved to a small town in southeastern Brazil, which was his home until he began his undergraduate degree in biological sciences at the University of São Paulo. This is where his passion for science began, and also where he went on to earn his master’s and doctoral degrees in comparative biology.

Pteropods, which live in all the world’s oceans, are tiny cousins of the snail that spend their lives swimming in open water and serving as a primary food source for larger marine life, including salmon, sharks, and whales. With their delicate shells, pteropods are also in peril from increases in ocean acidity, said biologist Amy Maas, a champion for pteropods. The changing ocean chemistry caused by burning fossil fuels is reducing the mineral that pteropods use to build their shells, causing slower shell growth and rendering them weak and fragile.

When marine biologists Gretchen Goodbody-Gringley and Tali Mass met at a science conference last June, they bonded over their shared interest in deep-water coral reef research and their specialized scuba diving skills. Both are technical divers, skilled at using equipment called rebreathers—which recycle every breath and incorporate a mix of oxygen, helium, and nitrogen gases—to access corals living at depths of about 100 to 500 feet (30 to 150 meters).

Sustained ocean observations provide the foundation for much of the chemical and physical oceanographic research that’s taking place around the world. Such observations, collected over the years and sometimes decades, give scientists insight into global cycles, regional variability and seasonal trends, and long-term changes in ocean chemistry.

For researchers interested in the global climate system, understanding what the future holds often involves studying the climate of the past—a scientific field called paleoclimatology. To understand what Earth’s climate was like thousands, even millions, of years ago, paleoclimatologists rely on preserved physical evidence of climate information, such as tree rings, ice cores, and even the shells of marine microorganisms.

Scientific conferences are an important, if not essential, part of a scientist’s life, both in academic and applied research. These gatherings, which often take place on an international scale, offer attendees the chance to learn about novel research, give presentations on their own research, and develop professional collaborations that can result in publications and funding opportunities.