577 replies to this topic
Posted 2014-03-11 22:23:26
By the way, does anyone know why aqmthai.com and aqicn.com give such different readings?
Posted 2014-03-12 07:04:47
The Chinese site (Aqicn) gave accurate information for a while but at the moment doesn't seem to be showing current values. Either way it's supposed to be data from the same source, from the measuring stations run by the Thai Pollution Control Department. (Just with the difference that the Chinese site showed the two-day average)
So stick with the Thai site. It provides values in real time, and I've checked the readings visually for about a week and I'm quite confident in the readings (for the Yupparaj downtown station).
Edited by WinnieTheKhwai, 2014-03-12 07:12:16.
Posted 2014-03-12 12:02:32
If you have Google Earth installed then you can download this MODIS firemap file and open it in Google Earth. You can zoom in to the CM area to see the hotspots. Right click and "Save Link As" and then open in Google Earth. Fire data can be obtained here - MODIS Active Fire Maps
Example of current 48 hours
Posted 2014-03-12 18:32:24
Interesting report elsewhere today on ThaiVisa Chiang Mai about a NIDA study about cancer. See: http://www.thaivisa....-8#entry7553896
Not really good news when you think about it, so nothing to really make you feel much better!
Keep in mind that cancer is only one danger from carbon emissions of various kinds, and it is not clear what else might have been included in the study.
One could wonder about the regional analysis, too, and whether there is an apples and oranges problem in the research design.
Ignored, of course, is that the morbidity and mortality rates due to agricultural burning probably have much more to do with respiratory and other diseases, not cancer. See under “Health Effects” here: http://en.wikipedia....ki/Particulates .
NIDA is basically a business school, but does have a Faculty of Social and Environmental Development. Perhaps that is where the research came from. One might think that the Ministry of Public Health or Natural Resources and Environment would have done some research like this. Maybe they have. There is one quite good study on the hazards agricultural burning involving concentrations of PM<2.5 done by someone at CMU. It was posted on "Smoke, Smog, Dust 2013 CHiang Mai, as I recall. Anyway, a little cross-disciplinary research can be a good thing.
All in all, of course, inhaling automotive exhaust or smoke from agricultural burning or forest fires is not recommended, to say the least!
Edited by Mapguy, 2014-03-12 18:38:12.
Posted 2014-03-12 19:25:26
All these expert reports coming out of China and Bangkok mean nothing to the people of Chiangmai who are chocking to death. All is well I assure you from our air conditioned offices a thousand kms away
Posted 2014-03-13 07:21:21
Chiang Mai looks to be the center of the universe, burning-wise in SE Asia. The image below is not very useful, but you can use Google Earth to zoom in to your area after you download a KML file for SE Asia from this website Tywais posted earlier: https://earthdata.na...ctive-fire-data Our air up in Mae Taeng took a drastic downward turn overnight.
Posted 2014-03-13 08:11:10
Agreed; I'm not sure that those pics with arbitrary zoom-settings, arbitrary time period (day? week?) and an arbitrary (but fixed) fire icon size is very indicative of what's going on.
Clearly it's going to be hazy/smoggy the second half of March, but I can tell people that looking at a calendar. Not sure you can tell how bad it's going to be by looking at the fire map. (Or if so, how.)
In other words, I have no idea if what I'm looking at is good, bad, or normal for the time of the year.
And no idea if and how much this is going to impact the haze over the coming days. (Trust me, I wish I did know; the only way I can somewhat predict things is by looking at surrounding provinces' PM10 readings.)
Now for some wild guess work, in the above I see forest fires in the hills, but the Chiang Mai / Lamphun valley (where rice is grown) seems relatively clear of major fires. I wonder if that means if there is less rice field burning. But with nothing to compare it to, it's all a bit pointless to try and say anything.
I often wish we had Priceless back to painstakingly analyse stuff over time.
Edited by WinnieTheKhwai, 2014-03-13 08:24:46.
Posted 2014-03-13 10:42:01
Here in Thaton, Mae Ai district, there was an immense forest burning on the mountains yesterday afternoon and evening. Its a border area with Burma.
Edited by Joop50, 2014-03-13 10:43:16.
Posted 2014-03-13 17:57:49
Me too! I put on my N95 mask today and took the mountain bike up in the hills and ran into a hunter. I asked him why there was so little burning this year and he responded "mai hang" or not dry. Still quite green up there. If we get some rain, maybe it will stay that way until the regular rains start.
Posted 2014-03-13 18:31:16
Yep, as we drove home this afternoon, you could see the wind was from the southish by the direction the giant plumes of smoke were blowing. Fortunately, away from our place. Other folk, not so lucky.
Posted 2014-03-13 20:16:44
San Sai has not been to bad today but the last 3 or 4 days were hell, burning eyes and extremely hard to breathe. Still not comfortable but can spend 10 or 15 minutes outside.
Posted 2014-03-13 20:21:12
Buy a decent face mask reduce exercise outside ( even with mask ) keep the windows closed ...if you have a chest complaint see your doctor BUT get a good mask
Posted 2014-03-14 12:26:04
Thick, thick, thick. Today was the worse I have seen it this year. Heavy white haze all the way from Mae Hia to Chiang Mai University. At CMU could not see Doi Suthep temple.
PM10 at Yupparaj of 131, at City Hall 129. Max safe level is 120. Still not that high relative to previous years for this month. 172 at Lampang, highest in the country.
Posted 2014-03-14 17:34:19
Posted 2014-03-14 19:37:03
Rain in Nimmen today 5.45pm.
Lasted about 30 seconds.
Went to make sure no one was using a hosepipe.
Where did it go, why 30 seconds.
Talk about someone taking yer toys off yer.
Posted 2014-03-14 21:27:00
Yupparaj has seen 207 today, Lampang (38t) 232 and here in Phrae we had 304.
All aqmthai.com - What's the reason for our different results?
Btw aqicn.org shows CM 89, Lampang 134, Phrae 103.
Posted 2014-03-14 21:28:39
Coming in from the north today, we thought CM was fairly clear!
Posted 2014-03-14 21:33:25
Really bad SK way. Tons to do in the garden, but my eyes don't like it
Posted 2014-03-14 21:54:52
Note that the standard figure is a daily average. That assumes that there will be many values higher than that, and many values lower than that. It doesn't matter too much in the example you gave as today's daily average will end up in the 120-130 region anyway, but it's important to keep this separate when comparing numbers.
Look up. (Post 177) : http://www.thaivisa....-8#entry7550998
Edited by WinnieTheKhwai, 2014-03-14 21:57:34.
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