4 ms·

This is similar to what is there in India during summer. Isn't this more problemematic in Australia because of ozone layer depletion [1]? [1] https://www.envir

This is similar to what is there in India during summer. Isn't this more problemematic in Australia because of ozone layer depletion [1]? [1] https://www.environment.gov.au/protection/ozone/ozone-science/ozone-layer#More_about_ozone_layer_depletion https://www.environment.gov.au/protection/ozone/ozone-scienc...

tkyjonathan 7y ago
I was under the impression that parts of the ozone have been repairing..
- ben_w 7y ago
  It is, but there was a lot of damage and it will be a long time before it’s back to normal. https://svs.gsfc.nasa.gov/30602 https://svs.gsfc.nasa.gov/30602
- NeedMoreTea 7y ago
  They are, but CFCs are so potent and long lasting that even with the restoration it's going to be about another 50 years before it's "fixed". IIRC it took a couple of decades or more after the global CFC ban for it to even stop getting worse...
DavidPiper 7y ago
Though I know it wasn't your intent, I just want to call out explicitly that ozone layer depletion and global warming are two separate mechanisms. Yes, CFCs (Chlorofluorocarbons, the molecules that destroy the ozone layer) are also strong greenhouse gases, but they are present in such small amounts that their effect on global warming is negligible. In the case of the ozone layer, we took action in time and the ozone layer is repairing well [1]. (Somewhat coincidentally - also from the same source - I just learned that warmer global temperatures actually inhibit ozone layer depletion.) [1] https://www.nasa.gov/feature/goddard/2019/2019-ozone-hole-is-the-smallest-on-record-since-its-discovery https://www.nasa.gov/feature/goddard/2019/2019-ozone-hole-is...
shakna 7y ago
Ozone depletion simply means the sun is more damaging. You burn easier, and you get cancer easier. The long heatwave problems, exhaustion, dehydration, exacerbated fires and so on might be exacerbated in some parts of the country but not to a great extent. If you take the usual precautions (sunscreen, hat, etc.) you shouldn't see an effect.

tkyjonathan 7y ago

I was under the impression that parts of the ozone have been repairing..

ben_w 7y ago
It is, but there was a lot of damage and it will be a long time before it’s back to normal. https://svs.gsfc.nasa.gov/30602 https://svs.gsfc.nasa.gov/30602
NeedMoreTea 7y ago
They are, but CFCs are so potent and long lasting that even with the restoration it's going to be about another 50 years before it's "fixed". IIRC it took a couple of decades or more after the global CFC ban for it to even stop getting worse...

DavidPiper 7y ago

Though I know it wasn't your intent, I just want to call out explicitly that ozone layer depletion and global warming are two separate mechanisms. Yes, CFCs (Chlorofluorocarbons, the molecules that destroy the ozone layer) are also strong greenhouse gases, but they are present in such small amounts that their effect on global warming is negligible. In the case of the ozone layer, we took action in time and the ozone layer is repairing well [1]. (Somewhat coincidentally - also from the same source - I just learned that warmer global temperatures actually inhibit ozone layer depletion.) [1] https://www.nasa.gov/feature/goddard/2019/2019-ozone-hole-is-the-smallest-on-record-since-its-discovery https://www.nasa.gov/feature/goddard/2019/2019-ozone-hole-is...

shakna 7y ago

Ozone depletion simply means the sun is more damaging. You burn easier, and you get cancer easier. The long heatwave problems, exhaustion, dehydration, exacerbated fires and so on might be exacerbated in some parts of the country but not to a great extent. If you take the usual precautions (sunscreen, hat, etc.) you shouldn't see an effect.