Jump to content
Sgcarmart Trusted Brand Showcase - Jack Cars at Katong i12 from 22 to 28 Apr 2024 ×

Haze Updates 2021-23 trilogy

Didu

By Didu,
in Lite & EZ

 Share

Recommended Posts

Watwheels

Watwheels

Supersonic
(edited)

https://www.asiaone.com/singapore/psi-hits-unhealthy-level-due-high-ozone
 

"SINGAPORE - Air quality hit unhealthy levels again in the northern parts of Singapore on Sunday (March 28) evening, because of high concentrations of ozone, according to the National Environment Agency's (NEA) website.

At 8pm, the Pollutant Standards Index (PSI) reading stood at 114, in the unhealthy range, though it returned to the moderate range at 9pm, with the PSI dropping to 97.

Air quality is considered unhealthy when the PSI is in the range of 101 to 200. Under these conditions, healthy people are urged to reduce prolonged or strenuous outdoor physical exertion, while vulnerable groups, including the elderly, should minimise prolonged physical activity.

When the PSI is above 200, it is in the very unhealthy range.

The PSI is calculated based on six pollutants - particulate matter, fine particulate matter (PM2.5), sulphur dioxide, carbon monoxide, ozone and nitrogen dioxide.

This means that a spike in concentrations of any one of the six can lead to a deterioration in air quality.

As at 9pm on Sunday, the eight-hour average ozone concentration, was above 100 in the north, central and south regions of Singapore, according to the NEA website.

During periods of haze caused by forest fires in the region, the dominant pollutant is PM2.5.

On Sunday, the hourly concentration of fine particulate matter remained in the normal range. The 24-hour average of the PM2.5 readings was within the moderate range.

Similar conditions had been reported on Feb 27, when PSI levels had gone into the unhealthy range.

An NEA spokesman told The Straits Times on March 2 that the pollutants which contribute to the formation of ozone, such as nitrogen dioxide and volatile organic compounds, were within the normal levels.

However, weather conditions such as ambient temperature, ultraviolet levels, wind speed, wind direction and rainfall can also influence the formation of ground-level ozone.

For example, the maximum temperature on Feb 27 was 35.3 deg C. This was the highest recorded in 2021 for the northern region, the spokesman said.

Coupled with high ultraviolet levels, this could have contributed to the elevated ozone levels, reaching the unhealthy range, she added.

ST has contacted NEA for comment."

Quote

Actually hor, after putting up a wall of text the ppl at NEA never say the air level is really unhealthy or not. There's no haze particulates. It's just that reading read high. So what does it mean in simple terms ppl can understand?

 

Edited by Watwheels
  • Praise 1
Link to post
Share on other sites
Victor68

Victor68

Turbocharged

The theory of farmers burning is flawed. For small local farmers, they cannot afford not to plant annually. They have been doing this for centuries. So we should get the haze annually. If they could cause such haze we have experienced, they are not small anymore. 

It is the big palm oil plantations that are the culprits. Burning down forest bigger than the land of Singapore to achieve such haze. Not able to detect is nonsense when they can pin point and hunt down terrorist in hiding. It is a joke.

Link to post
Share on other sites
Watwheels

Watwheels

Supersonic

Ppl burn incense lah. 

Why do people burn incense on Chinese New Year?

"This is when people burn incense, pray for good health, wash away the bad and welcome in the new." The Lunar New Year also marks a time for family reunions and the honoring of ancestors and deities.

  • Haha! 1
Link to post
Share on other sites
Blueray

Blueray

Hypersonic
10 hours ago, 13177 said:

 

Haze in Feb?

i checked NEA website last night. no hotspots in JB and Indo, so guess its our haze lor. [;)]

  • Haha! 2
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • Create New...