I just know this is asking for trouble, but here goes…..from JustIn:

————————————————————————————

The record for the longest stretch of hot weather in Melbourne has been broken.

The temperature has been above 30 degrees Celsius for nine days in a row.

The weather bureau’s James Taylor says it breaks the previous record set in February 1961.

“I suppose one of the significant things about this heat spell is we’ve had six days greater than 35C,” he said.

“The other significant thing is we’ve had very warm nights. Six nights above 20C in a row which equals the record.

“The last time that happened was in the week before Black Saturday.”

There will be some relief from the heat tomorrow when a southerly to south-westerly change moves across the state in the morning.

———————————————————————————

My questions, and yes, I have tried Googling but got a bit lost.

1. Is this based on the Melbourne city weather station near the Exhibition Buildings? The one in the middle of the intersection?

2. If it is, it should have warmed up years ago with the heat island effect. In 1961 there were fewer huge buildings and a lot fewer buildings with aircon spewing the heat out into the atmosphere.

3. If it is not, is it a sort of averaging of temps across Melbourne and metro?

I think that will do for a start.

there is an article about cities and heat

it was on the ABC Science forum that got shut down

very thoughtful of them to get rid of all that information

that we collected over the years

I think I understand the heat island effect. I’m just thinking it means Melbourne pretty much has to be hotter now than it was when I was 3 years old.

I have trouble understanding the differences between heat island effect, global warming and climate change

I found one recent article

http://news.nationalgeographic.com.au/news/2013/130128-climate-cities-urban-heat-island-atmosphere-science/

but, yes it is hot,

I have trouble understanding the differences between heat island effect, global warming and climate change
———————————————————-

The heat island effect is factored into the gobal warming calcs.

It is an arbitray amount… that if a bit higher would mean, no warming…

Hope that helps.

Mr Ironic said:

I have trouble understanding the differences between heat island effect, global warming and climate change
———————————————————-

The heat island effect is factored into the gobal warming calcs.

It is an arbitray amount… that if a bit higher would mean, no warming…

Hope that helps.

Really? Why don’t they calculate it?

.
Really? Why don’t they calculate it?
———————————————————-

Yeah, I read it on the net…

The real problem is determining a differing amount for different cities over variable time frames.

Eg. New York has expanded, and this is a concrete example, many times more than most rural towns,cities and back waters.

how big is New York in diameter?

how big is Melbourne in diameter?

how big do these cities grow each year?

maybe someone can do the math

its way beyond me though

http://www.bom.gov.au/vic/melbourne-observations-map.shtml

bom melbourne weather station map.

Interestingly, earlier on this evening chatting with my friend in France, who said that there was a cold wind beginning to blow and it felt like it was from the Arctic. I was watching TV and indeed that is the case. The cold wind is sweeping down from the Arctic across France and then is moving up towards Moscow, where they are anticipating 25cm of snow, and the coldest temperatures in 50 years. This, as spring begins. It also follows the coldest winter that Russia has had in 70 years and in fact Europe and China have had record cold temperatures in December 2012.

It seems like the the run of hot temperatures here are matched by record cold temperatures in the Northern Hemisphere.

morrie said:

Interestingly, earlier on this evening chatting with my friend in France, who said that there was a cold wind beginning to blow and it felt like it was from the Arctic. I was watching TV and indeed that is the case. The cold wind is sweeping down from the Arctic across France and then is moving up towards Moscow, where they are anticipating 25cm of snow, and the coldest temperatures in 50 years. This, as spring begins. It also follows the coldest winter that Russia has had in 70 years and in fact Europe and China have had record cold temperatures in December 2012.

It seems like the the run of hot temperatures here are matched by record cold temperatures in the Northern Hemisphere.

What you have to be mindful of though Morrie is that this cold weather should not be interpreted as evidence of the world cooling as some with an agenda will have us believe.
It’s just weather, not average weather because the weather is hardly ever average.

Yes, the record is set from the Melbourne central station. It has the longest continuous data record. No doubt it is affected by the heat island effect, so hot records are more likely to be set now from this effect. (Note that at least some recent records haven’t just been set by a little, they’ve been smashed.)

As alluded to above, the data that is used for climate calculations from Australia comes from more selected stations without UHI. The one close to Melbourne, for example is at the Laverton RAAF base.