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bruce511

I like how "world-wide" is code for "northern hemisphere".

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I mean it's close enough, yeah. 70% of land is there[0] and close to 90% of the people[1].

[0] https://en.wikipedia.org/wiki/Northern_Hemisphere#/media/Fil...

[1] https://en.wikipedia.org/wiki/Northern_Hemisphere#Demographi...

well, good to know. 30% of the land, 10% of the people... Of course 70%ish of the planet is water, so by the same logic, "Earth is completely covered by water worldwide" ?

That depends on if you have an ethno-centric or a hydro-centric view of the world.

Anthro / Geo. Hydro view would be “97% of water is saline” and Ethno “4 religions account for over 77% of the world's population”

Please correct me if I’m wrong.

Ethnic is not relative to religion per se, but language and traditions.

For what I find on search engines, Ethno is relative to race, people, culture. that includes language, traditions and religions.

Well we call it "The Blue Marble", so we kind of already do that a little bit.

It's unfortunate they don't make a GLOBAL sea surface temperature anomaly map...

oh, they do

https://www.ospo.noaa.gov/Products/ocean/sst/anomaly/

There's a reason we call it "the blue marble".

Effects spread wide enough can be said to be characteristic of the Earth's dynamics without needing to cover 100.000% of the surface. In the case of the article, if it affects enough of the population, we can generalize without missing the point.

If it was an article written for fish, I'm sure it would matter

What is the threshold for "world-wide" to apply?

Antarctic sea ice is also extremely low for the time of year (see https://nsidc.org/arcticseaicenews/ ), so it's not only the north.

That website shows that there's more ice than in 2012, 2019, 2020 and 2021.

Only other data available on that chart is 2022 and 1981-2010 median.

edit: I was reading the Arctic chart and I was corrected below

That's the Arctic, the chart for the Antarctic is further down and has 1970-2023.

https://nsidc.org/arcticseaicenews/charctic-interactive-sea-...

Switch to Antarctic and make sure to click "Show All Years". Until 2023 even low years were at least slowly marginal departures overlapping with previous years. 2023 is so far off the trend it almost looks like a data error. I've never seen anything like it.

For those who don't want to play with the chart - we're apparently below the previous record by 1.5 million square kilometers of ocean with at least 15% ice compared to the record for the prior 45 years... so that's a bit concerning.

https://i.imgur.com/2VgP96t.png

Also of note: the previous record that's being shattered was last year.

I didn't want to nitpick but why is that metric "at least 15% ice per square kilometer" ?

Can the 15% from four square kilometers bunch up in one square kilometer resulting in a 75% decrease of ice ?

That's not how sea ice works in general - the ice is 'centered' on the continent with 100% coverage and the edges are where you need to make a judgement call on whether they are covered or not. We've established an area grid encompassing the entire antarctic and measure the extent by seeing how many grids are at least 15% ice:

https://portal.nccs.nasa.gov/datashare/polar/CSIC/SH_animati...

but rest assured, we also measure the total sea ice area which removes all possibility of the 'bunching' you're concerned about -- it's similarly catastrophic;

Compared to the past 10 years: https://portal.nccs.nasa.gov/datashare/polar/CSIC/SH_yearly_...

Compared to the past 45 years with low/high/average: https://portal.nccs.nasa.gov/datashare/polar/CSIC/SH_decadal...

I am a bit confused. The start of the year looked bad but then it's better than the last couple years? (or almost the same)

It's the Antarctic, so the ice will grow during the summer months in the Northern hemisphere because it is winter there. It started off at a record low because that's where the dashed red line left it there in the Arctic summer of 2022, and it has departed so far from the previous years that it is now completely disjoint and more than 2 million square kilometers or about 10% of the total scale of the chart behind where it normally would have been. If nothing changes (and why would it?) then it will peak at the 15th of September at 16 million square kilometers setting it up for next year with a start that is even lower. This is unbelievable. As in: I believe it but it defies the imagination, think about the quantity of ice you're talking about and try to imagine the amount of energy required to melt it. And that phase change sink is what effectively is one of the last emergency sinks for all that heat. If and when it goes all that energy will go directly into heating the ocean instead.

> It's the Antarctic, so the ice will grow during the summer months in the Northern hemisphere because it is winter there.

You mean Southern, right?

No, ice grows now, so during summer in the north. Or winter in the south, same thing.

It's winter in the Antarctic right now. And summer in the North. Confusing...

That's insane. Utterly depressing.

Yeah, there wasn't really an ozone hole... in the northern hemisphere.

Why did everybody talk about it so much and spend so much effort fixing it?

Because it would grow if we didn’t?

That, and because ultimately the whole world is affected and the "news" is just there to motivate people and governments to do something about it. Pointing out that it's winter in the southern hemisphere right now isn't really relevant.

90% of humans live in the northern hemisphere.

Southie here - it is bloody cold here right now - 12C.

We should be super concerned if there were a heat wave on the south end this time of year :-)

Well, actually just a couple weeks ago I was riding to work in my summer kit in ~15° C weather. It was only after last week's rain that temperatures finally dropped to something reasonably seasonal.

check out "McArthur's Universal Corrective Map of the World"

Is there a modern version of this?

Narukawa's AuthaGraph map is actually a family of projections so you don't have to settle on one bias/distortion. I like Buckminster Fuller's Dymaxion projection, with the North Pole roughly in the middle. That is a very practical way to present the planet laid flat because of shortest international flight routes frequently being over the Arctic.

There is no 400km rampart at the Equator. It's not because it's technically winter there that it is not hotter than normal.

North is up, and up is better than down. ;)

https://www.youtube.com/watch?v=B14Gtm2Z_70

PS did I really need to add /s? Anyway the video is an interesting watch about the implicit biases that come from map orientation.

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