Air Pollution

NZstorm · Unread post by **NZstorm** » Tue 22/07/2003 18:45

This layer of air pollutants caught my eye over Auckland this morning.
Radiative cooling at night produces a temperature inversion off the surface which traps emissions such as vehicle fumes. All thanks to the big Anticyclone over NZ at the moment.

Thunder · Unread post by **Thunder** » Wed 23/07/2003 16:45

Wow! I didn't relise Auckland had pollution like that, I thought we were the only ones here in Chch because of us being stuck between Banks peninsula and the Alps.

As Micheal often says it is always raining and I'm guessing possibly windy to in Auckland, does that mean pollution isn't genuraly a problem in Auckland because it would get blowen out to sea? Here in Chch it just hangs around because in winter time it doesn't get hugly windy when a big high is over us.

Cheers
Aaron Wilkinson

NZstorm · Unread post by **NZstorm** » Wed 23/07/2003 17:11

I think Christchurch has really cleaned up its act on air pollution Aaron, from where it used to be.

I notice air pollution in Auckland only occasionlly as it only takes a slight breeze to shift it away.

Michael · Unread post by **Michael** » Wed 23/07/2003 21:02

That was one of our rare days we have in Auckland

NZstorm · Unread post by **NZstorm** » Wed 23/07/2003 21:13

Michael.....what happened to the gales/horizontal rain.

Here is some Cumulus humulis, image taken today at Coatesville, Northwest Auckland where I was working. I am currently collecting images for my online cloud atlas.

NZ Thunderstorm Soc · Thu 24/07/2003 00:01

Interesting picture, Steven.
I have seen skies like that looking over ChCh from the Summit Road on the Port Hills on still anticyclonic days in Jan and Feb.
It would of made a good picture on the TV ONe or TV3 weather.

I don't think there will be a frost tonight in Chch, now 8C with a fresh ENE blowing. No frost here this morning, I got down to 3c, the same at the airport. Also I don't think the barometer got up to 1038hPa as what MetService's noon reading said. My baro peaked at 1033.7hpa here and went down slightly at noon.

JohnGaul
NZTS

NZ Thunderstorm Soc · Thu 24/07/2003 00:10

Steven,
Regading the Cu Hu photo, I wouldn't regard it as Cu humulus as it looks more mediocris to me. Hu would be much smaller and less actve looking!! but that is my opinion

JohnGaul
NZTS

Michael · Unread post by **Michael** » Thu 24/07/2003 09:15

NZstorm wrote:Michael.....what happened to the gales/horizontal rain.

They'll come allright Wait till our unsettled westerly spring thats more like winter like of the last 3 years

NZstorm · Unread post by **NZstorm** » Thu 24/07/2003 19:51

John, I agree...C mediocris.

I got a better example today. A light easterly brought in some moisture today coupled with afternoon convective turbulence....fair weather cumulus the result.

Cumulus mediocris