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>> tremendously important for carbon draw down, takes in carbon dioxide. >> reporter: fight plankton jump start the cycle of life, feeding on the phyto plankton under the ice are zoo fish that feed all the way up the food chain, including us. >> it's exciting. there's a lot there. a lot different than what we've seen so far actually, in terms of the diversity of things. >> reporter: initial data from hundreds of samples confirm the team's expectations, plankton, that critical source of ocean food concentrates where the freshly melted ice is. >> this is crazy how strong this is, 14 milligrams p...

>> cnn's arwa damon joined them in the far reaches of the arctic where the ice is not just facing a threat from above the water, but also from below. >> reporter: it's spring in the arctic. nature is waking up as the sea ice melts, warmed by 24 hours of sunlight. this year saw a record loss of sea ice in april across the arctic, and this is where that ice comes to die. but the story of ice loss is more than just warming air. >> i would try to keep going further in. >> reporter: we're in the fram strait, far north in the arctic circle. >> so we're choosing this area because this is an area wher...

Fighto plankton. >>s they are tremendously important for carbon drawdown, they photo synthesize and take in carbon dioxide. >> phyto plankton don't just store carbon dioxide, they jumpstart the cycle of life, and phyto plankton are zoo plankton which feed the small fish, feeding the bigger fish all the way up the food chain, including us. >> that is exciting. there is a lot. and this is very different from what we've seen so far, actually. in terms of just the diversity of things. >> initial data from hundreds of samples confirmed the team's expectations. plankton, that critical source of ocea...

Scientists say could be the dire effects and some of those same scientists are looking at the threats that could be posed not only above the water but below. and arwa damon went to the far reaches of the arctic to find out what they're studying. >> reporter: it's pring in the arctic. nature is waking up, as the ice melts. warmed by 24 hours of sunlight. this year, saw a record loss of sea ice in april across the arctic and this is where that ice comes to die. but the story of ice is more than just the warming. >> i would say it is tying to keep growing. >> we're in the from straits, far north ...

Alarming rate. >> reporter: it's spring in the arctic. nature is waking up as the sea ice melts, warmed by 24 hours of night. this year saw a record loss in april across the arctic. this is where that ice comes to die. but the story of ice loss is more than just warming air. >> i would -- it's trying to keep going further in. >> reporter: we're in the fromme strait, farther north of the arctic circle. >> we're choosing this area, because this is warm water meeting the ice edge. >> reporter: matt uses cape is one of a small group of scientists, the warm water they're talking about is the fast-m...