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on september 18th

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satellites observed that arctic sea ice

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had reached its annual low

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this year's sea ice minimum is

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effectively tied for the second lowest

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on record

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and while sea ice grows and shrinks with

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the seasons

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2019 continues the downward trend of the

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the trends that we've been seeing with

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the sea ice minimum have just been a

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decrease so in the 70s since the modern

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record began tracking

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to today

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there's there's variation from year to

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year but it's really just a downward

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trend

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satellite observations show that arctic

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sea ice is not only shrinking in extent

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it is also becoming younger and thinner

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that means less and less ice survives

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the annual melt the the arctic is

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actually warmed a lot more than the

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globe as a whole there's a something

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called arctic amplification which means

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that

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the the temperatures in the arctic have

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warmed about two to three times the

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global average

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a major cause of this warming is due to

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the loss of reflectivity or albedo of

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the sea ice snow-covered sea ice has a

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high albedo this keeps the sun's energy

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from being absorbed by a dark ocean

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but when sea ice begins to melt it loses

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some of that reflectivity

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and without the sea ice cover the ocean

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will absorb most of the sun's energy

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this creates a feedback loop that leads

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to more melting and warming in the

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arctic

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we care about sea ice for a variety of

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reasons one being

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because it does have an impact on things

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like our weather and our climate because

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of the albedo effect if you decrease the

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amount of arctic sea ice

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you start warming up the arctic and when

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you start warming up the arctic you can

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start changing the circulation of the

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the jet stream which brings weather to

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us here in the mid-latitudes the other

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other reasons why we care about

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sea ice arctic sea ice in particular is

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because we've seen such big changes due

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to warming melting ice it's a

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good visual to show that yes the climate

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is changing and it's because of warming

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nasa continues to monitor these changes

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to the arctic so that we may get a