Live data from Hacker News

Nitrogen dioxide emissions drop over Italy

esa.int

21–30 of 66 posts

Re: Nitrogen dioxide emissions drop over Italy

#21
post #6

This lines up with a hypothesis I've got that this is causing severe cases in places where there is a high baseline of lung damage. Either from asthma or other genetic conditions, or from exposure to poor air quality. Such that these lock downs are preventing more bad cases, but not by preventing the spread of covid, but by limiting exposure to other things. In this case, it could be lowering emissions period, which…

So why not India?

Give it a couple of weeks.

Re: Nitrogen dioxide emissions drop over Italy

#22
post #3

Reduced travel and industry will see this happen and saw this in China, globally over the year the effect will be interesting and whilst it will do wonders for the climate. One aspect that I'm currently pondering is the winter 20/21. Reason being that it has been shown that less planes flying means temperature difference day/night, slightly warmer during day, but also colder at night. As we saw for the days post 9/11…

Airline co2 emissions represent an irrelevant amount compared to the great benefits it provides

Re: Nitrogen dioxide emissions drop over Italy

#23
I really do hope that this event will give a big blow to the mass-tourism industry. It doesn't feel right to catch a flight from Europe to half-way around the world (Thailand, let's say) for just a few hundred euros, there are lots of externalities not included in that price. To say nothing of the Dutch-disease-like effects brought by mass tourism to those tourist places.

Re: Nitrogen dioxide emissions drop over Italy

#24
post #3

Reduced travel and industry will see this happen and saw this in China, globally over the year the effect will be interesting and whilst it will do wonders for the climate. One aspect that I'm currently pondering is the winter 20/21. Reason being that it has been shown that less planes flying means temperature difference day/night, slightly warmer during day, but also colder at night. As we saw for the days post 9/11…

Airline co2 emissions represent an irrelevant amount compared to the great benefits it provides

Could you back this up with statistics?

Re: Nitrogen dioxide emissions drop over Italy

#25
post #3

Reduced travel and industry will see this happen and saw this in China, globally over the year the effect will be interesting and whilst it will do wonders for the climate. One aspect that I'm currently pondering is the winter 20/21. Reason being that it has been shown that less planes flying means temperature difference day/night, slightly warmer during day, but also colder at night. As we saw for the days post 9/11…

Airline co2 emissions represent an irrelevant amount compared to the great benefits it provides

stratospheric water vapor, on the other hand...

Re: Nitrogen dioxide emissions drop over Italy

#26
post #17
post #3

Reduced travel and industry will see this happen and saw this in China, globally over the year the effect will be interesting and whilst it will do wonders for the climate. One aspect that I'm currently pondering is the winter 20/21. Reason being that it has been shown that less planes flying means temperature difference day/night, slightly warmer during day, but also colder at night. As we saw for the days post 9/11…

It seems like this is a drop in the bucket in the grand scheme of all the pollution that’s happened over the last 150 years. Is it reasonable to expect a lasting effect here?

On the one hand it's just a drop in the bucket; on the other hand, emissions have been growing exponentially, so it's quite a big drop.

Re: Nitrogen dioxide emissions drop over Italy

#28
post #3

Reduced travel and industry will see this happen and saw this in China, globally over the year the effect will be interesting and whilst it will do wonders for the climate. One aspect that I'm currently pondering is the winter 20/21. Reason being that it has been shown that less planes flying means temperature difference day/night, slightly warmer during day, but also colder at night. As we saw for the days post 9/11…

This is 100% anecdotal but I saw it snow the other day in Tokyo in March and it’s been very cold. It’s been a while since it’s snowed in March I’m sure. I’ve also noticed the Japanese alps we’re having a super bad winter until a few weeks back when things kicked into gear and the snow started falling again. I have absolutely no idea but Is it possible to have a short term decrease in emissions change the weather like…

what you're seeing is weather. what's important is climate. you'll see more strange weather as a consequence of the changing climate.

Re: Nitrogen dioxide emissions drop over Italy

#29
post #3

Reduced travel and industry will see this happen and saw this in China, globally over the year the effect will be interesting and whilst it will do wonders for the climate. One aspect that I'm currently pondering is the winter 20/21. Reason being that it has been shown that less planes flying means temperature difference day/night, slightly warmer during day, but also colder at night. As we saw for the days post 9/11…

Not to be a downer but the opposite could also be true. The less economic activity, the less particle emissions. While those particle emissions eventually contribute to global warming, they actually prevent a rise in temperatures in the short-term by blocking sunlight. Like you mentioned, the highs are higher and the lows are lower. We could actually see an acceleration of some of global warmings' effects on the clim…

I hope you understand that your declaration sounds bonkers to any rational person? I understand of course that there is a possibility as the system is chaotic. But narrative wise this creates an impossible situation, where everything, even the movement in the supposedly right direction is bad? I would consider "What else do you want from me? ---- off" a normal and valid reaction to this.

Re: Nitrogen dioxide emissions drop over Italy

#30
post #10

TIL: Northern Italy was pretty fucked up emission-wise even before Corona kicked in.

I wonder if the extremely high fatality count in Italy is due to the hight air pollution putting people in a higher risk.

Actually, fatality is most likely not as high as it appears from (confirmed) cases compared to deaths.

A large fraction of cases may go unrecorded because people only have minor symptoms and don't get hospitalized. In places with more extensive testing, like South Korea, deaths make up < 1% of confirmed cases. And even there, it's assumed that not all of them have been recorded.

Post reply on HN