since records began 40 years ago a major source of siberian sea ice hasn't started freezing the laptev seaknown as the birthplace of ice this is the longest it's known to have gone without freezing over scientists believe it's because of a record breaking heat wave and changing waters in the atlantic ocean they're worried the lack of ice will cause chain reactions across the arctic. my. this is al jazeera and these are the headlines u.s. president donald trump and his democratic nominee joe biden have held their final debate before the election in less than 2 weeks as music microphones went for a far less chaotic exchange than the 1st. we had the best black unemployment numbers in the history of our country hispanic women asian people with diplomas with no diplomas mit graduate.

since records began 40 years ago a key source of siberian sea ice has yet to start freezing the laptev seanown as the birthplace of ice this is the lisa says ever gone without starting to freeze scientists believe it's because of a record breaking heat wave in the region and changing waters in the atlantic ocean basin box as an ice climatologist he says the drop in temperature could lead to other problems in the region. this sea ice has in the last 40 years lost half of its mass half of its the ignus and half of its area and this year after extremely persistent heat wave that affected siberia since since time that we've the fires are across northern siberia this part of the arctic is especially warm and so we see the sea ice effectively reacting to this extremely warm situation in it off the north coast of siberia and it's a great concern because it's a very shallow sea and. underneath that 10 to 40 meter deep water layer is a sea bed that itself contains an enormous store of current and i'm concerned that any warming the sea waters can destabilize the carbon at sea that so this area of op

since records began 40 years ago a major source of siberian sea ice hasn't started freezing the laptev seaknown as the birthplace of ice this is the longest it's ever gone without starting to friens scientists believe that's because of a record breaking heat wave and changing waters in the atlantic ocean they're worried the lack of ice will cause chain reactions across the arctic. people in chile will vote this weekend on whether their nation's constitution should be written many and favor say it could mark a nice start for a country that's faced a year of political crisis but opponents say it will put the future of chile a risk latin america editor of the c n human reports from santiago was at the sound of vile is frightened of the future of chile replaces its current constitution with a flag in one hand and a plaque card in the other she joins hundreds of others who've been campaigning every week calling on chileans to vote late chassell or reject in sunday's referendum to decide whether or not to draft a new magna carta ca they chant chile will not become cuba or venezuela from all that

freezing the laptev sea is known as the birthplace of ice this is the longest it's known to have gone without freezing over scientists believe it's because of a record breaking heat wave and changing waters in the atlantic ocean they're worried the lack of ice will cause chain reactions across the arctic. this is al jazeera and these are the headlines u.s. president donald trump and his democratic nominee joe biden have held their final debates before the election less than 2 weeks. microphones went for far less chaotic and students than the 1st. we had the best black unemployment numbers in the history of our country hispanic women asian people with diplomas with no diplomas mit graduates number one in the class everybody had the best numbers and you know what the other side wanted to get together they wanted to unify success is going to bring us together we run the road to success but i'm cutting taxes and he wants to raise everybody's taxes and he wants to put new regulations are never think he will kill it if he gets in you will have a depression the likes of which you've never se

out to the north pole you're looking at norway over there and around to rusher on that side the laptev sea is this little inlet if you like is the bay here this picture taken on september the 15th when the ice had retreated to its 2nd lowest level on record usually by this stage the end of a sort of the end of october the ice has actually come this far and hit the coast again but not this year but we heard from jason boxer who is an ice climatologist a professor at the geologic survey of denmark and green and he says the drop in temperature could lead to other problems in the region you see guys has in the last 40 years lost half its mass. and half of its area in this year after green leaves persistent heat wave that affected siberia since since time the fires across northern siberia this part of the arctic is actually warm and so we see the sea ice effectively reacting to this extremely warm situation in the north coast of syria and it's a great concern has a very shallow sea. and. underneath that 10 to 40 meter deep water layer is a sea bed that itself contains an enormous store of carpe