Antarctic Algae Adventure: Uncovering Hidden Ice Blooms and Climate Clues

Dr Emily Broadwell, a scientist from the University of Bristol, recently completed a three-month research mission to Signy Island in Antarctica. Her goal was to study the different types of algae that grow on snow and glaciers in one of the most remote places on Earth. Emily and her team traveled for two weeks to reach the island, crossing the dangerous Drake's Passage, where ocean waves can reach up to 18 meters high. Once on Signy Island, they stayed at an old whaling station that is now used for scientific research. The temperatures were usually around zero degrees Celsius, and the island was covered in snow and ice.

During her time on the island, Emily collected samples from different snow and ice surfaces. She discovered that there were many unique communities of microscopic algae living there. This was surprising because scientists used to think that all Antarctic glaciers would react the same way to climate change. Emily's findings showed that each type of snow and ice had its own special group of algae. Some areas were covered with red snow algae, which is different from what is usually found in other cold places like Greenland. These algae are important because they use photosynthesis to absorb carbon dioxide from the air, but they also make the snow darker. When the snow gets darker, it melts faster because it does not reflect as much sunlight.

After returning to the UK, Emily took the algae samples to her lab at the University of Bristol's Cabot Institute for the Environment. She studied the DNA of the algae and compared them to samples from the Arctic and the Alps. Her research showed that the algae on Signy Island are very diverse and that some types are rarely seen anywhere else. This means that as the climate gets warmer, the algae in Antarctica might not change in the same way as those in other places. Emily's work is important because it helps scientists understand how life in cold environments might be affected by global warming. Her colleague, Dr Chris Williamson, said that there is still much more to learn about these tiny organisms and their role in the ecosystem.