Sorry to interrupt the thread but I need to verify something here.
If you have your own laser particle counter, do you notice that the data from here
http://fuzzyview.neocities.org/fuzzy25.htm are lagging behind the real time values obtained from the counter by about 2hours?
I have been monitoring the values and whenever there is a sharp rise, I can detect on my counter and then 2hours later, the values in fuzzy show the rise. Similarly, when there is a dip, the dip in values in fuzzy is 2hours late.
Anyone can confirm or noticed this?
Yes, I think more than 20 of us have noticed and also confirmed this many times during 2015 haze. In fact, I think much more, could be as many as 50?
Approx 1+ to 2+ hrs lag.
That is also to say that the 3-hr PSI could be as much as 5 hours late, and it also does not help that the 3-hr PSI is averaged for the 5 regions in Singapore (North, South, East, West, Central).
Most of us view it as being pretty much
useless.
Hence, the purchases of our own meters.
An extreme example is on 19th Oct with West @ 471 ug/m3 (PSI 481) and South at 301 ug/m3, we could still see babies/kids playing @ Playgrounds and joggers jogging....it's not forum say-say how siao for fun only....people posted pics etc.
One part of SG was 471 ug/m3/PSI 481 ("Hazardous" range) and North was at 35 ug/m3 /PSI 77. It's like, WTF man?
The 3-hr PSI by NEA coluld be extremely misleading to a very large extent during some circumstances.
Of coz, they'd say on national TV that 2hrs of that levels of smoke isn't an issue, you'd need days at that level to cause any problem.
Up to the individual then, can go jogging and babies out there learning to walk @ own risk, my colleague spent well > 1k on specs and 1 hospital stay for her 2 kids, besides it's not my family and not my life. Many of us just put out the warnings and "try to do our part".
