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Tywais

Smoke, Smog, Dust 2012 Chiang Mai

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Priceless    177

Slightly bored of dust levels , I pulled another high stat. off the chart

http://aqmthai.com/

Numbers for NO2 - these are x10-20 those of other areas being 42-70 ppb in Chiang Mai

However these are in ppb

Found a conversion rate of times 1.91 to put into micrograms per cubic metre which pollutant levels seem to normally be measured in. (there is a longer equation haven't tried that)

http://forum.onlinec...read.php?t=9436

According to this , this would put NO2 levels in Chiang Mai at around 80-130 µg/m3

"There is some evidence that long-term exposure to NO2 at concentrations above 40–100 µg/m3 may decrease lung function and increase the risk of respiratory symptoms.

Nitrogen dioxide is a large scale pollutant, with rural background ground level concentrations in some areas around 30 µg/m3, not far below unhealthy levels."

According to this an NO2 level of over 100 is off the stratosphere and pretty poisonous. Any thoughts on this.

It is worth noting the expression 'long-term exposure'. The World Health Organization has the following to say about short-term exposure:

'The current scientific literature has not accumulated evidence to change from the WHO guideline value of 200 μg/m3 for

1-hour nitrogen dioxide concentration'. (Air Quality Guidelines, Global Update 2005, p376)

/ Priceless

Those are the 1 hour average figures and if you look at those statistics on for example the Australian permitted levels. It says the 1 hour average should be only permittable for 1 day per year.

We are clearly exceeding that at present

Averaging time Maximum concentration (µg/m3) Goals within 10 years Maximum allowable exceedences 1 hour 246 (0.12 ppm) 1 day a year 1 year (State of Victoria)

Yes, I don't intend to argue with you. I have concentrated my interest on PM10 and know very little about other pollutants. Just thought I'd add something that I'd come across 'by accident'.

/ Priceless

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cheeryble    653

This year is extraordinary!

[...]

Well not really, I'm afraid. Since the 'Chiang Mai' measuring station suffered a breakdown for four days (25-28 February) I looked at the Uparaj station numbers instead. Of the previous eight years (2004-2011) four had significantly higher February pollution levels than this year (2004, 2005, 2007 and 2009). Two had levels pretty much equal to this year (2006 and 2010). Only 2008 and 2011 were significantly better.

I think what we are facing is the human tendency to remember more recent events (in this case 2011) a lot more strongly and think that these events are the norm. The latter half of February and most of March are usually bad and (so far) this year has followed that pattern.

I'm crossing my fingers that the pattern will be broken this March rolleyes.gif

/ Priceless

Hi Priceless

As a student of the mind I'm with you on the human tendencies to forget the past and emphasise the present....however in this year's case it's the number of affected people I personally meet regularly which to me is extraordinary.

I know anecdote is not the gold standard, but two more people are now added to the 5 on my sick list.

My 30yo girlfriend has a bad allergic reaction, and Howard Graves is off colour and has just called off all operas for the month.

As for CM residents actually doing something instead of navel gazing....what do you think of a MARCH?

I remember there's a highly respected older Thai activist who has a big network of schoolkids who could perhaps do something.

I know there used to be an activist group about this.....know anything about it?

Cheeryble

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Priceless    177

ตารางที่ ๑ แสดงค่าเฉลี่ย ๒๔ ชั่วโมงของ PM10และ AQI ในภาคเหนือ ณ เวลา ๐๙.๐๐ น. วันที่ ๒ มีนาคม ๒๕๕๕

สถานี PM10* AQI** คุณภาพอากาศ

เชียงราย

สนง.ทรัพยากรธรรมชาติและสิ่งแวดล้อม.เมือง๒๕๐.๖ ๑๕๗ มีผลกระทบต่อสุขภาพ

สาธารณสุขแม่สาย.แม่สาย.เชียงราย๓๒๓.๔ ๑๘๘ มีผลกระทบต่อสุขภาพ

เชียงใหม่

ศาลากลาง.เมือง.เชียงใหม่๑๗๑.๖ ๑๒๒ มีผลกระทบต่อสุขภาพ

โรงเรียนยุพราชวิทยาลัย.เมือง.เชียงใหม่๑๔๙.๐ ๑๑๓ มีผลกระทบต่อสุขภาพ

พระตำหนักภูพิงคราชนิเวศน์.เชียงใหม่ (Mobile)*** ๓๒. ๔๑ดี

ลำพูนสนามกีฬาอบจ. .เมือง.ลำพูน๑๕๐.๒ ๑๑๓ มีผลกระทบต่อสุขภาพ

Trying to copy this off aqmthai website, doesn't really copy the table but you can get the gist .

Basically all bad but huge difference and improvement up at Phuping if these are correct.

I think that you rather safely assume that the Phuping figures are correct. Doi Pui is at an altitude more than 5,000 feet above mean sea level, and particulate matter pollution rarely reaches that high in any significant concentrations.

/ Priceless

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Priceless    177

This year is extraordinary!

[...]

Well not really, I'm afraid. Since the 'Chiang Mai' measuring station suffered a breakdown for four days (25-28 February) I looked at the Uparaj station numbers instead. Of the previous eight years (2004-2011) four had significantly higher February pollution levels than this year (2004, 2005, 2007 and 2009). Two had levels pretty much equal to this year (2006 and 2010). Only 2008 and 2011 were significantly better.

I think what we are facing is the human tendency to remember more recent events (in this case 2011) a lot more strongly and think that these events are the norm. The latter half of February and most of March are usually bad and (so far) this year has followed that pattern.

I'm crossing my fingers that the pattern will be broken this March rolleyes.gif

/ Priceless

Hi Priceless

As a student of the mind I'm with you on the human tendencies to forget the past and emphasise the present....however in this year's case it's the number of affected people I personally meet regularly which to me is extraordinary.

I know anecdote is not the gold standard, but two more people are now added to the 5 on my sick list.

My 30yo girlfriend has a bad allergic reaction, and Howard Graves is off colour and has just called off all operas for the month.

As for CM residents actually doing something instead of navel gazing....what do you think of a MARCH?

I remember there's a highly respected older Thai activist who has a big network of schoolkids who could perhaps do something.

I know there used to be an activist group about this.....know anything about it?

Cheeryble

I must admit that I somewhat fear the coming March. Luckily, there's not a very strong correlation between the PM10 values for February and for March (0..63 for the 'Chiang Mai measuring station) so I'm still keeping my fingers crossed rolleyes.gif

/ Priceless

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MESmith    4,593

ME and Mrs Smith did a circular hike from Ban Doi Pui up to the peak of Doi Pui at 1685m. Air very clean up at the top. From the view point above Ban Doi Pui, however, I could see that we were still in the smog, as we gazed at light brown haze hiding the view of anything but the nearest ridges, though much better than down at the valley floor. No coughing up there, & no sore eyes. Those returned back on the valley floor. The forest is very green up there. Worth the trip, & will go again soon :)

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cheeryble    653

This year is extraordinary!

[...]

Well not really, I'm afraid. Since the 'Chiang Mai' measuring station suffered a breakdown for four days (25-28 February) I looked at the Uparaj station numbers instead. Of the previous eight years (2004-2011) four had significantly higher February pollution levels than this year (2004, 2005, 2007 and 2009). Two had levels pretty much equal to this year (2006 and 2010). Only 2008 and 2011 were significantly better.

I think what we are facing is the human tendency to remember more recent events (in this case 2011) a lot more strongly and think that these events are the norm. The latter half of February and most of March are usually bad and (so far) this year has followed that pattern.

I'm crossing my fingers that the pattern will be broken this March rolleyes.gif

/ Priceless

Hi Priceless

As a student of the mind I'm with you on the human tendencies to forget the past and emphasise the present....however in this year's case it's the number of affected people I personally meet regularly which to me is extraordinary.

I know anecdote is not the gold standard, but two more people are now added to the 5 on my sick list.

My 30yo girlfriend has a bad allergic reaction, and Howard Graves is off colour and has just called off all operas for the month.

As for CM residents actually doing something instead of navel gazing....what do you think of a MARCH?

I remember there's a highly respected older Thai activist who has a big network of schoolkids who could perhaps do something.

I know there used to be an activist group about this.....know anything about it?

Cheeryble

I must admit that I somewhat fear the coming March. Luckily, there's not a very strong correlation between the PM10 values for February and for March (0..63 for the 'Chiang Mai measuring station) so I'm still keeping my fingers crossed

/ Priceless

No No

I mean what do you think of a march.....a demo....a protesting mob?

rolleyes.gif

Cheeryble

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Priceless    177

I must admit that I somewhat fear the coming March. Luckily, there's not a very strong correlation between the PM10 values for February and for March (0..63 for the 'Chiang Mai measuring station) so I'm still keeping my fingers crossed

/ Priceless

No No

I mean what do you think of a march.....a demo....a protesting mob?

rolleyes.gif

Cheeryble

I understood that perfectly well. However, since people are complaining so much about this past February i thought it relevant to say something about the coming March (i.e. the month).

As for your march, I think that you might irritate a few people. Apart from that, I don't think you will achieve anything. Political demonstrations by foreigners are not that appreciated here, in my experience (though other posters might not agree).

/ Priceless

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harrry    4,802

I can just imagine a group of farangs stumbling along LoyKrau Rd coughing and spluttering.......

On second thoughts that is normal here anyway.

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T_Dog    1,943

What were the PM10 levels in CM today? Visibility in Mae Taeng continues to be less than 2 km in the morning, but the winds cleared things up in the afternoon. Had quite a bit of black soot fall today so the burning is still active. In 2007 there was quite a push by the Public Health department for folks to stop burning and village announcements and forest officials back then spread that word as well. This year there seems to be nothing of the sort even though it is considerably worse.

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Priceless    177

What were the PM10 levels in CM today? Visibility in Mae Taeng continues to be less than 2 km in the morning, but the winds cleared things up in the afternoon. Had quite a bit of black soot fall today so the burning is still active. In 2007 there was quite a push by the Public Health department for folks to stop burning and village announcements and forest officials back then spread that word as well. This year there seems to be nothing of the sort even though it is considerably worse.

At the 'Chiang Mai' measuring station (near the Provincial Hall) it measured 171.6 µg/m3. Since you are a ways north of town, it might be more relevant to look at Chiang Rai at 250.6 (or even Mae Sai at 323.4!!!!!).

Please accept my deepest sympathywai.gif

/ Priceless

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chiang mai    12,592

If you think about how long it's taken to get the current low percentage of motorcycle riders to wear crash helmets, that action invloved passing legislation plus active involvement from the police across the country, all fining helmetless riders on a regular basis - that started some seven years ago and look how far it's got today, does anyone really think that an effective programme aimed at reducing pollution can be enacted in shorter timescales, I seriously doubt it!

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T_Dog    1,943

What were the PM10 levels in CM today? Visibility in Mae Taeng continues to be less than 2 km in the morning, but the winds cleared things up in the afternoon. Had quite a bit of black soot fall today so the burning is still active. In 2007 there was quite a push by the Public Health department for folks to stop burning and village announcements and forest officials back then spread that word as well. This year there seems to be nothing of the sort even though it is considerably worse.

At the 'Chiang Mai' measuring station (near the Provincial Hall) it measured 171.6 µg/m3. Since you are a ways north of town, it might be more relevant to look at Chiang Rai at 250.6 (or even Mae Sai at 323.4!!!!!).

Please accept my deepest sympathywai.gif

/ Priceless

Thanks Priceless for those rather scary numbers. And regarding sympathy, I didn't even tell you we are camped out in it...... The scourge of the air coming down the mountain at 3 AM is horrible.

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Priceless    177

If you think about how long it's taken to get the current low percentage of motorcycle riders to wear crash helmets, that action invloved passing legislation plus active involvement from the police across the country, all fining helmetless riders on a regular basis - that started some seven years ago and look how far it's got today, does anyone really think that an effective programme aimed at reducing pollution can be enacted in shorter timescales, I seriously doubt it!

I really do hate repeating myself, but the average pollution level in Chiang Mai has been, trend-wise, decreasing by more than a third over the last 7½ years:

post-20094-0-44651700-1330693023_thumb.j

/ Priceless

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MESmith    4,593

What were the PM10 levels in CM today? Visibility in Mae Taeng continues to be less than 2 km in the morning, but the winds cleared things up in the afternoon. Had quite a bit of black soot fall today so the burning is still active. In 2007 there was quite a push by the Public Health department for folks to stop burning and village announcements and forest officials back then spread that word as well. This year there seems to be nothing of the sort even though it is considerably worse.

At the 'Chiang Mai' measuring station (near the Provincial Hall) it measured 171.6 µg/m3. Since you are a ways north of town, it might be more relevant to look at Chiang Rai at 250.6 (or even Mae Sai at 323.4!!!!!).

Please accept my deepest sympathywai.gif

/ Priceless

Thanks Priceless for those rather scary numbers. And regarding sympathy, I didn't even tell you we are camped out in it...... The scourge of the air coming down the mountain at 3 AM is horrible.

Head for higher ground T-Dog, especially if you're camping :(

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chiang mai    12,592

So four years for every 10 micrigrams reduction, at that rate we'll be down to zero in fourteen years, phew, thanks for that, I feel much better and now wont worry nearly so much.

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