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There have been further reports this month that ice聽in the Arctic聽is聽melting聽at an alarming rate.聽It's led to warming in the Barents Sea, which no longer produces ice sheet in the Winter at the rate it used to. This week Adam Walton talks to Dr Yueng-Djern Lenn, a senior lecturer in Physical Oceanography at Bangor University, who has been studying the process in the Barents Sea. She is also involved with the Changing Arctic Ocean Programme - a series of projects examining the impact of the saltier, warmer water on food webs. Her colleague at CAO, Dr Rachel Jeffreys, who is a marine biologist based at Liverpool University,聽explains what archived seal teeth can tell us about evolving Arctic food webs.聽聽 Prof Claire Mahaffey, who like Rachel, is based at Liverpool University,聽 is lead investigator with CAO's ARISE project. She says the Arctic Ocean's ecosystems provide key services, such as control of climate and nutrient cycling, and explains why evaluating聽the effects of recent change is vital聽to the聽understanding how our environment might change in the future.聽聽

Adam's final guest is Dr Arwyn Edwards, a biologist at IBERS at Aberystwyth University. He explains why he studies microbes on the ice and how he developed a portable DNA sequencing device to help him with his work.聽