If you want to see this in video, I recommend the documentary "Chasing Ice". It's available on Netflix.
agreed, it's a super documentary
Visualizing the Shrinking Sea Ice
11–20 of 35 posts
Re: Visualizing the Shrinking Sea Ice
#12>The chart’s data comes from the National Snow and Ice Data Center, a collaboration between NOAA and the University of Colorado. This is the oldest data set for sea ice available—it goes back to 1978. (That’s a pretty long time, at least for satellites: Landsat, the longest continuously operated satellite-data program, only started six years earlier.)
The satellite era for Arctic ice did not start in 1979. It started in 1973. The 1990 IPCC report shows a graph of it:
http://www.ipcc.ch/ipccreports/far/wg_I/ipcc_far_wg_I_chapte...
[see page 30 of the .pdf (= page 224 of the IPCC report) Figure 7.20a]
It shows the ice grew ~1.5 million km before 1979, and has declined since then. So starting the record in 1979 (at a peak) is a bit of a cheat.
>Mapbox has also placed the sea-ice levels next to Earth’s mean atmospheric temperature.
Also be wary of talk of average atmospheric arctic temperature increases. They certainly have increased, but that obscures the whole picture. It's only in the summer that arctic air temperatures rise above freezing, and summer temperatures have not increased at all since 1958. See all years here:
http://ocean.dmi.dk/arctic/meant80n.uk.php
It's variations in winter, spring and autumn (when air temperatures are still well below freezing) that has raised the average temperature. In my view the ice is probably mainly melting from below from heat transported from the Atlantic. Less insulating ice allows water (~ +4c) to warm the colder air above it. It's not melting from above from increased air temperatures as the article seems to imply.
[18.55 Edited for idiocy]
Re: Visualizing the Shrinking Sea Ice
#13>The chart’s data comes from the National Snow and Ice Data Center, a collaboration between NOAA and the University of Colorado. This is the oldest data set for sea ice available—it goes back to 1978. (That’s a pretty long time, at least for satellites: Landsat, the longest continuously operated satellite-data program, only started six years earlier.) The satellite era for Arctic ice did not start in 1979. It started…
Aaah the never ending debate about global warming. It's been proven to be a scam so many times and everyone has their favorites.
To me when NASA came and admit the rising temperatures on Earth do match up with rise of temperatures on most other planets of our system, including Mars, because the Sun has its rising/declining activity patters and some go into thousands of years, this was clear indication humans are like a drop of blood in a Pacific Ocean. AFAIK, there are not human-made factories on Mars.
End of discussion.
Re: Visualizing the Shrinking Sea Ice
#14Wow, The period of 2009 to 2012 was not kind for the ice at all. What caused such a large decrease?
Natural variation?
Re: Visualizing the Shrinking Sea Ice
#15>The chart’s data comes from the National Snow and Ice Data Center, a collaboration between NOAA and the University of Colorado. This is the oldest data set for sea ice available—it goes back to 1978. (That’s a pretty long time, at least for satellites: Landsat, the longest continuously operated satellite-data program, only started six years earlier.) The satellite era for Arctic ice did not start in 1979. It started…
> It's only in the summer that arctic air temperatures rise above freezing
Which "freezing" are you talking about? 0C (32F)? Because sea ice has a different freezing point.
> In my view the ice is probably mainly melting from below from heat transported from the Atlantic.
How does ocean acidification (possibly) factor in?
Re: Visualizing the Shrinking Sea Ice
#16>The chart’s data comes from the National Snow and Ice Data Center, a collaboration between NOAA and the University of Colorado. This is the oldest data set for sea ice available—it goes back to 1978. (That’s a pretty long time, at least for satellites: Landsat, the longest continuously operated satellite-data program, only started six years earlier.) The satellite era for Arctic ice did not start in 1979. It started…
Aaah the never ending debate about global warming. It's been proven to be a scam so many times and everyone has their favorites. To me when NASA came and admit the rising temperatures on Earth do match up with rise of temperatures on most other planets of our system, including Mars, because the Sun has its rising/declining activity patters and some go into thousands of years, this was clear indication humans are like…
UN's IPCC assessment reports - the fifth published last year - may give you some perspective on science's view of climate change (which is the commonly used term).
Re: Visualizing the Shrinking Sea Ice
#17>The chart’s data comes from the National Snow and Ice Data Center, a collaboration between NOAA and the University of Colorado. This is the oldest data set for sea ice available—it goes back to 1978. (That’s a pretty long time, at least for satellites: Landsat, the longest continuously operated satellite-data program, only started six years earlier.) The satellite era for Arctic ice did not start in 1979. It started…
Aaah the never ending debate about global warming. It's been proven to be a scam so many times and everyone has their favorites. To me when NASA came and admit the rising temperatures on Earth do match up with rise of temperatures on most other planets of our system, including Mars, because the Sun has its rising/declining activity patters and some go into thousands of years, this was clear indication humans are like…
is this a troll post copied and pasted from facebook?
Re: Visualizing the Shrinking Sea Ice
#18At the same time (well, within a couple of years) antarctic sea ice is at record high levels https://www.washingtonpost.com/blogs/capital-weather-gang/wp...
...which, as the article notes, is not necessarily good news: the southern ocean is warming.
"article." The author got his Bachelors of Arts in Music.
Re: Visualizing the Shrinking Sea Ice
#19At the same time (well, within a couple of years) antarctic sea ice is at record high levels https://www.washingtonpost.com/blogs/capital-weather-gang/wp...
If you put together the volume of extra sea ice gained around Antarctica, and the volume of land ice melted there, guess what? There is net melting of ice!
Grabbing one factoid out of context does not change the overall trend.
Re: Visualizing the Shrinking Sea Ice
#20>The chart’s data comes from the National Snow and Ice Data Center, a collaboration between NOAA and the University of Colorado. This is the oldest data set for sea ice available—it goes back to 1978. (That’s a pretty long time, at least for satellites: Landsat, the longest continuously operated satellite-data program, only started six years earlier.) The satellite era for Arctic ice did not start in 1979. It started…
> It's only in the summer that arctic air temperatures rise above freezing Which "freezing" are you talking about? 0C (32F)? Because sea ice has a different freezing point. > In my view the ice is probably mainly melting from below from heat transported from the Atlantic. How does ocean acidification (possibly) factor in?
Also, the sea ice itself is much fresher than the ocean, so it's melting temperature is much closer to 0C than you might expect. And even the distinction between freezing seawater and freshwater at the surface is less then 2C, so it's not a huge difference.
I can't think of an obvious way that acidification factors in, unless there are important connections between sea ice and sensitive biological factors (I'm not aware of any, but I'll wait to be corrected).