Antarctic temperature rises above 20C for first time on record • Hacker News Board

Re: Antarctic temperature rises above 20C for first time on record

#11

Post by Daishiman » Thu, Feb 13, 2020, 6:19 PM UTC

chrisco255 wrote: post #10

throwaway5752 wrote: post #7

Earlier quoted context omitted.

Unless the average geothermal heat flux is changing (and nothing about your link suggests this), this has been constant over the time spans in question and changes would be localized and temporary. Mt Erebus and its lava lake have been known to modern science for almost 200 years. The link you sent is talking about glacial motion and to what extent they've been under modeling contributions from meltwater from that ex…

The point I'm trying to make is the Antarctic isn't melting, and it's in fact, growing in ice extent. However, you can make a headline out of tiny regional fluctuations and puff it up to be more than it is. I'm not impressed that a record from Antarctica was broken (1 degree warmer than 1982? Yawn). How long have we had stations in this particular location? 40 years? 50 years? Meanwhile you've got sensationalist head…

The fact that you talk about ice extension as anything relevant proves your lack of knowledge in this topic.

Ice extent is fairly irrelevant for sea level rise. Existing glacier melt for glaciers that are extremely large (kilometers deep) is extremely relevant for global sea level. The nelti of Antarctic glaciers has a very substantial impact on sea level and oceanic currents, which affects climate across the entire Southern hemisphere.

Re: Antarctic temperature rises above 20C for first time on record

#12

Post by throwaway5752 » Thu, Feb 13, 2020, 6:28 PM UTC

chrisco255 wrote: post #10

throwaway5752 wrote: post #7

Earlier quoted context omitted.

Unless the average geothermal heat flux is changing (and nothing about your link suggests this), this has been constant over the time spans in question and changes would be localized and temporary. Mt Erebus and its lava lake have been known to modern science for almost 200 years. The link you sent is talking about glacial motion and to what extent they've been under modeling contributions from meltwater from that ex…

The point I'm trying to make is the Antarctic isn't melting, and it's in fact, growing in ice extent. However, you can make a headline out of tiny regional fluctuations and puff it up to be more than it is. I'm not impressed that a record from Antarctica was broken (1 degree warmer than 1982? Yawn). How long have we had stations in this particular location? 40 years? 50 years? Meanwhile you've got sensationalist head…

I can't even pretend to care what the Daily Sun has as headlines, whether it supports my case or not.

The overall, global warming trend is increasing just as predicted (or a bit worse) decades ago based on continuing CO2 emissions and resulting increased atmospheric concentrations. This single, otherwise not so noteworthy observation is just a footnote in ongoing climate change disaster. The fact that an entire continent (Australia) broke its annual average temperature record by 3 deg F last year is much more alarming and relevant.

Re: Antarctic temperature rises above 20C for first time on record

#13

Post by KidComputer » Thu, Feb 13, 2020, 6:30 PM UTC

chrisco255 wrote: post #2

Paper mentions Thwaites glacier but does not mention the subsea volcanoes contributing to ice loss in the West Antarctic: https://www.livescience.com/46194-volcanoes-melt-antarctic-g... Antarctica as a whole has seen a slight increase in ice over the last 40 years, with record extent being achieved as recently as 2014: https://nsidc.org/data/seaice_index/

Wow it's almost like ice breaks off and drifts away increasing extent as it is melting. A smarter person might look for the total ice mass over time and would find a massive fucking decline. But yeah.

https://www.pnas.org/content/116/4/1095

Re: Antarctic temperature rises above 20C for first time on record

#14

Post by ujjjujjj » Thu, Feb 13, 2020, 7:22 PM UTC

chrisco255 wrote: post #10

throwaway5752 wrote: post #7

Earlier quoted context omitted.

Unless the average geothermal heat flux is changing (and nothing about your link suggests this), this has been constant over the time spans in question and changes would be localized and temporary. Mt Erebus and its lava lake have been known to modern science for almost 200 years. The link you sent is talking about glacial motion and to what extent they've been under modeling contributions from meltwater from that ex…

The point I'm trying to make is the Antarctic isn't melting, and it's in fact, growing in ice extent. However, you can make a headline out of tiny regional fluctuations and puff it up to be more than it is. I'm not impressed that a record from Antarctica was broken (1 degree warmer than 1982? Yawn). How long have we had stations in this particular location? 40 years? 50 years? Meanwhile you've got sensationalist head…

'in fact' the ice mass is shrinking: https://www.pnas.org/content/116/4/1095

The ice extend increases.

"The total mass loss from Antarctica increased from 40 ± 9 Gt/y in the 11-y time period 1979–1990 to 50 ± 14 Gt/y in 1989–2000, 166 ± 18 Gt/y in 1999–2009, and 252 ± 26 Gt/y in 2009–2017, that is, by a factor 6 (Fig. 2, Table 1, and SI Appendix, Fig. S1). This change in mass loss reflects an acceleration of 94 Gt/y per decade in 1979–2017, increasing from 48 Gt/y per decade in 1979–2001 to 134 Gt/y per decade in 2001–2017, or 280%. "