We’ve had strange temperatures in Melbourne. Two cold summers in a row, and it looks like being a third one. After a long series of hot summers.

I wanted to look at warming trends, using BOM data. Thankfully, somebody has beaten me to it.

https://www.degruyter.com/document/doi/10.1515/nleng-2013-0006/pdf

I’ve known for many decades about the urban heat island. Since the 1980s if not before. By 2005, by computations, I had confirmed for Brisbane that the main culprit is air conditioners. During summer, air conditioners pump out a lot of heat into the atmosphere in keeping buildings cool. But I expected the effect of air conditioning to be smaller in Melbourne. Some other factor may predominate.

The paper quoted is titled “Melbourne urban heat island contamination of temperature
trend maps in Victoria, Australia”.

In the paper we find that temperature inceases due to the urban heat island effect are much faster than temperature increases due to global warming.

The first observation is that average yearly minimum temperatures are increasing faster than average yearly maximum temperatures, from years 1896 to 2010. At Cape Otway, average monthly maximum temperatures have been decreasing quite rapidly. Also decreasing in Echuca and Wilson’s Promentary. Yearly maximum temperatures have been rising in Ballarat and Melbourne. Overall from 1896 to 2010 there has been a slight cooling of maximum temperatures throughout Victoria rather than a rise.

Yearly minimum temperatures are rising fastest in Melbourne, much faster than in country Victoria. And this is due to the heat island effect. Similar results are expected elsewhere around Australian urban temperature rises are dominated by the urban heat island effect, rather than global warming or regional climate change.

All Youth Climate Protest Leaders Present As Female ¡

https://www.abc.net.au/news/2023-11-18/climate-change-school-strike-protests-kids-demand-action/103112486

mollwollfumble said:

We’ve had strange temperatures in Melbourne. Two cold summers in a row, and it looks like being a third one. After a long series of hot summers.

I wanted to look at warming trends, using BOM data. Thankfully, somebody has beaten me to it.

https://www.degruyter.com/document/doi/10.1515/nleng-2013-0006/pdf

I’ve known for many decades about the urban heat island. Since the 1980s if not before. By 2005, by computations, I had confirmed for Brisbane that the main culprit is air conditioners. During summer, air conditioners pump out a lot of heat into the atmosphere in keeping buildings cool. But I expected the effect of air conditioning to be smaller in Melbourne. Some other factor may predominate.

The paper quoted is titled “Melbourne urban heat island contamination of temperature
trend maps in Victoria, Australia”.

In the paper we find that temperature inceases due to the urban heat island effect are much faster than temperature increases due to global warming.

The first observation is that average yearly minimum temperatures are increasing faster than average yearly maximum temperatures, from years 1896 to 2010. At Cape Otway, average monthly maximum temperatures have been decreasing quite rapidly. Also decreasing in Echuca and Wilson’s Promentary. Yearly maximum temperatures have been rising in Ballarat and Melbourne. Overall from 1896 to 2010 there has been a slight cooling of maximum temperatures throughout Victoria rather than a rise.

Yearly minimum temperatures are rising fastest in Melbourne, much faster than in country Victoria. And this is due to the heat island effect. Similar results are expected elsewhere around Australian urban temperature rises are dominated by the urban heat island effect, rather than global warming or regional climate change.

I guess you know that climate scientists know all about heat island effects?

Well known pseudo-sceptic Roy Spencer’s latest graph:

SCIENCE said:

All Youth Climate Protest Leaders Present As Female ¡

https://www.abc.net.au/news/2023-11-18/climate-change-school-strike-protests-kids-demand-action/103112486

Is that because women have to look more to the future?

roughbarked said:

SCIENCE said:

All Youth Climate Protest Leaders Present As Female ¡

https://www.abc.net.au/news/2023-11-18/climate-change-school-strike-protests-kids-demand-action/103112486

Is that because women have to look more to the future?

Maybe They’re Just Bad At Attending School ¡

⚠ this post may contain satirical elements

Nah we d’n‘o’, maybe it’s just the media pushing the narrative. We’ren’t sure that there should be an intrinsic difference.

https://au.news.yahoo.com/why-sprawling-aussie-neighbourhood-is-set-to-be-hottest-place-on-earth-in-six-months-054156634.html

https://www.news.com.au/national/nsw-act/news/top-urban-planners-grim-warning-western-sydney-will-be-hottest-place-on-earth-within-months/news-story/8b4e1a6b9bb4564bda2d704330bc6f92

https://www.smh.com.au/national/nsw/the-sydney-suburbs-that-hit-50c-last-summer-20201002-p561by.html

No shade over roads

No white roofs

No mapping of how to use the breeze

The roofs don’t provide adequate shading for the walls

Generally young women are more articulate than young men, plus more empathetic, which means they are usually smarter at that stage of life.

PermeateFree said:

Generally young women are more articulate than young men, plus more empathetic, which means they are usually smarter at that stage of life.

Yes.

Narcissists screaming for attention

Little to no real world experience

Easily malleable, easily led , no development of critical thought.

They will scream into a megaphone for years rather than do anything on their own.

Jadav “Molai” Payeng (born 31 October 1959) is an environmental activist and forestry worker from Majuli, popularly known as the Forest Man of India. Over the course of several decades, he has planted and tended trees on a sandbar of the river Brahmaputra turning it into a forest reserve. The forest, called Molai forest after him, is located near Kokilamukh of Jorhat, Assam, India and encompasses an area of about 1,360 acres / 550 hectares. In 2015, he was honoured with Padma Shri, the fourth highest civilian award in India. He was born in the indigenous Mising tribe of Assam

Whilst others talk about it he sets about making real change – its almost always men.

wookiemeister said:

Jadav “Molai” Payeng (born 31 October 1959) is an environmental activist and forestry worker from Majuli, popularly known as the Forest Man of India. Over the course of several decades, he has planted and tended trees on a sandbar of the river Brahmaputra turning it into a forest reserve. The forest, called Molai forest after him, is located near Kokilamukh of Jorhat, Assam, India and encompasses an area of about 1,360 acres / 550 hectares. In 2015, he was honoured with Padma Shri, the fourth highest civilian award in India. He was born in the indigenous Mising tribe of Assam

Whilst others talk about it he sets about making real change – its almost always men.

Well, you sure talk a lot, and besides proving you are an ignorant feather-brained fuckwit. What have you ever achieved?

> I guess you know that climate scientists know all about heat island effects?

Yes, absolutely. But they don’t tell us how big it is.

For cities it is at least as large as global warming.

And they don’t tell us that it’s mostly due to the use of air conditioners. It’s still there even if we switch from coal to solar.

The Rev Dodgson said:

mollwollfumble said:

We’ve had strange temperatures in Melbourne. Two cold summers in a row, and it looks like being a third one. After a long series of hot summers.

I wanted to look at warming trends, using BOM data. Thankfully, somebody has beaten me to it.

https://www.degruyter.com/document/doi/10.1515/nleng-2013-0006/pdf

I’ve known for many decades about the urban heat island. Since the 1980s if not before. By 2005, by computations, I had confirmed for Brisbane that the main culprit is air conditioners. During summer, air conditioners pump out a lot of heat into the atmosphere in keeping buildings cool. But I expected the effect of air conditioning to be smaller in Melbourne. Some other factor may predominate.

The paper quoted is titled “Melbourne urban heat island contamination of temperature
trend maps in Victoria, Australia”.

In the paper we find that temperature inceases due to the urban heat island effect are much faster than temperature increases due to global warming.

The first observation is that average yearly minimum temperatures are increasing faster than average yearly maximum temperatures, from years 1896 to 2010. At Cape Otway, average monthly maximum temperatures have been decreasing quite rapidly. Also decreasing in Echuca and Wilson’s Promentary. Yearly maximum temperatures have been rising in Ballarat and Melbourne. Overall from 1896 to 2010 there has been a slight cooling of maximum temperatures throughout Victoria rather than a rise.

Yearly minimum temperatures are rising fastest in Melbourne, much faster than in country Victoria. And this is due to the heat island effect. Similar results are expected elsewhere around Australian urban temperature rises are dominated by the urban heat island effect, rather than global warming or regional climate change.

I guess you know that climate scientists know all about heat island effects?

Well known pseudo-sceptic Roy Spencer’s latest graph:

I guess you know that climate scientists know all about heat island effects?

Yep. But they don’t tell us that for cities it’s bigger than global warming.

As for that graph, you do know that they have to average the hell out of it to get a result that smooth.

I wonder, if you plot a graph for average minimum and maximum daily temperatures then do the two slopes lie parallel, or not? Have you ever seen a plot of that?

mollwollfumble said:

The Rev Dodgson said:

I guess you know that climate scientists know all about heat island effects?

Well known pseudo-sceptic Roy Spencer’s latest graph:

I guess you know that climate scientists know all about heat island effects?

Yep. But they don’t tell us that for cities it’s bigger than global warming.

As for that graph, you do know that they have to average the hell out of it to get a result that smooth.

I wonder, if you plot a graph for average minimum and maximum daily temperatures then do the two slopes lie parallel, or not? Have you ever seen a plot of that?

Thank you for drawing my attention to Roy Spencer. The most recent article on his blog is about urban heat islands.

mollwollfumble said:

I’ve known for many decades about the urban heat island. Since the 1980s if not before. By 2005, by computations, I had confirmed for Brisbane that the main culprit is air conditioners. During summer, air conditioners pump out a lot of heat into the atmosphere in keeping buildings cool.

Can you post the peer reviewed paper for this contention please.

mollwollfumble said:

> I guess you know that climate scientists know all about heat island effects?

Yes, absolutely. But they don’t tell us how big it is.

For cities it is at least as large as global warming.

And they don’t tell us that it’s mostly due to the use of air conditioners. It’s still there even if we switch from coal to solar.

Probably because it isn’t mostly due to the use of air conditioners.

The net temperature increase due to ac’s is proportional to the electricity they use, which is negligible compared to other effects such as large areas of dark paved surfaces.

mollwollfumble said:

The Rev Dodgson said:

mollwollfumble said:

We’ve had strange temperatures in Melbourne. Two cold summers in a row, and it looks like being a third one. After a long series of hot summers.

I wanted to look at warming trends, using BOM data. Thankfully, somebody has beaten me to it.

https://www.degruyter.com/document/doi/10.1515/nleng-2013-0006/pdf

I’ve known for many decades about the urban heat island. Since the 1980s if not before. By 2005, by computations, I had confirmed for Brisbane that the main culprit is air conditioners. During summer, air conditioners pump out a lot of heat into the atmosphere in keeping buildings cool. But I expected the effect of air conditioning to be smaller in Melbourne. Some other factor may predominate.

The paper quoted is titled “Melbourne urban heat island contamination of temperature
trend maps in Victoria, Australia”.

In the paper we find that temperature inceases due to the urban heat island effect are much faster than temperature increases due to global warming.

The first observation is that average yearly minimum temperatures are increasing faster than average yearly maximum temperatures, from years 1896 to 2010. At Cape Otway, average monthly maximum temperatures have been decreasing quite rapidly. Also decreasing in Echuca and Wilson’s Promentary. Yearly maximum temperatures have been rising in Ballarat and Melbourne. Overall from 1896 to 2010 there has been a slight cooling of maximum temperatures throughout Victoria rather than a rise.

Yearly minimum temperatures are rising fastest in Melbourne, much faster than in country Victoria. And this is due to the heat island effect. Similar results are expected elsewhere around Australian urban temperature rises are dominated by the urban heat island effect, rather than global warming or regional climate change.

I guess you know that climate scientists know all about heat island effects?

Well known pseudo-sceptic Roy Spencer’s latest graph:

I guess you know that climate scientists know all about heat island effects?

Yep. But they don’t tell us that for cities it’s bigger than global warming.

As for that graph, you do know that they have to average the hell out of it to get a result that smooth.

I wonder, if you plot a graph for average minimum and maximum daily temperatures then do the two slopes lie parallel, or not? Have you ever seen a plot of that?

“you do know that they have to average the hell out of it to get a result that smooth.”

It’s a plot of monthly averages with a 13 month running average.

Why would a climate change denialist like Spencer want to make the plot smoother than it really was?

mollwollfumble said:

mollwollfumble said:

The Rev Dodgson said:

I guess you know that climate scientists know all about heat island effects?

Well known pseudo-sceptic Roy Spencer’s latest graph:

I guess you know that climate scientists know all about heat island effects?

Yep. But they don’t tell us that for cities it’s bigger than global warming.

As for that graph, you do know that they have to average the hell out of it to get a result that smooth.

I wonder, if you plot a graph for average minimum and maximum daily temperatures then do the two slopes lie parallel, or not? Have you ever seen a plot of that?

Thank you for drawing my attention to Roy Spencer. The most recent article on his blog is about urban heat islands.

Spencer’s commentary is worthless.

His data is worth looking at because try as he might, he can’t hide the multi-decade trends.