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	<title>Comments on: Heatwave update and open letter to the PM</title>
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	<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/</link>
	<description>Getting to grips with the brave new world of future climate and energy - notes from a Promethean environmentalist</description>
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		<title>By: Moscow Doesn&#8217;t Believe in This &#124; Climate World Wide After 2009</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-90345</link>
		<dc:creator><![CDATA[Moscow Doesn&#8217;t Believe in This &#124; Climate World Wide After 2009]]></dc:creator>
		<pubDate>Thu, 12 Aug 2010 10:09:46 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-90345</guid>
		<description><![CDATA[[...] (I also ventured something like this about the Australian fires last year.)  Remember this?  Barry Brook quotes an anonymous colleague, and agrees. “Given that this was the hottest day on record on top of the driest start to a year [...]]]></description>
		<content:encoded><![CDATA[<p>[...] (I also ventured something like this about the Australian fires last year.)  Remember this?  Barry Brook quotes an anonymous colleague, and agrees. “Given that this was the hottest day on record on top of the driest start to a year [...]</p>
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	<item>
		<title>By: News from Doomtown &#171; Florifulgurator&#039;s Blog</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-89268</link>
		<dc:creator><![CDATA[News from Doomtown &#171; Florifulgurator&#039;s Blog]]></dc:creator>
		<pubDate>Sun, 08 Aug 2010 12:53:23 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-89268</guid>
		<description><![CDATA[[...] Anonymous at the Australian Bureau of Meteorology, regarding the Great Australian Heat Wave of 2009: Given that this was the hottest day on record on top of the driest start to a year on record on [...]]]></description>
		<content:encoded><![CDATA[<p>[...] Anonymous at the Australian Bureau of Meteorology, regarding the Great Australian Heat Wave of 2009: Given that this was the hottest day on record on top of the driest start to a year on record on [...]</p>
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		<title>By: Ryskt väder över gränsen till nytt klimat</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-89230</link>
		<dc:creator><![CDATA[Ryskt väder över gränsen till nytt klimat]]></dc:creator>
		<pubDate>Sun, 08 Aug 2010 06:41:45 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-89230</guid>
		<description><![CDATA[[...] väntas bli vanligare när temperaturen ökar. Någonstans finns dock en gräns, Tobis citerar Barry Brook som i samband med förra årets värmebölja i Australien citerar en okänd kommentarssk..., där man måste byta formuleringen &#8221;klimatförändringarna ökade sannolikheten för att [...]]]></description>
		<content:encoded><![CDATA[<p>[...] väntas bli vanligare när temperaturen ökar. Någonstans finns dock en gräns, Tobis citerar Barry Brook som i samband med förra årets värmebölja i Australien citerar en okänd kommentarssk&#8230;, där man måste byta formuleringen &#8221;klimatförändringarna ökade sannolikheten för att [...]</p>
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	<item>
		<title>By: perps</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-35075</link>
		<dc:creator><![CDATA[perps]]></dc:creator>
		<pubDate>Sat, 14 Nov 2009 06:26:36 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-35075</guid>
		<description><![CDATA[Ian George
What is your take on the heatwaves now? Three record heatwaves in two years in southeastern Australia see Barry&#039;s new post in the box above.]]></description>
		<content:encoded><![CDATA[<p>Ian George<br />
What is your take on the heatwaves now? Three record heatwaves in two years in southeastern Australia see Barry&#8217;s new post in the box above.</p>
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		<title>By: Two years, three record heat waves in southeastern Australia &#171; BraveNewClimate</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-35058</link>
		<dc:creator><![CDATA[Two years, three record heat waves in southeastern Australia &#171; BraveNewClimate]]></dc:creator>
		<pubDate>Sat, 14 Nov 2009 05:15:50 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-35058</guid>
		<description><![CDATA[[...] begun in Australia, and yet we are already sweltering under another record heat wave &#8212; the third in two years. Temperature records for the month of November have been broken across the region, [...]]]></description>
		<content:encoded><![CDATA[<p>[...] begun in Australia, and yet we are already sweltering under another record heat wave &#8212; the third in two years. Temperature records for the month of November have been broken across the region, [...]</p>
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		<title>By: Ian George</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-21033</link>
		<dc:creator><![CDATA[Ian George]]></dc:creator>
		<pubDate>Tue, 28 Jul 2009 04:04:56 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-21033</guid>
		<description><![CDATA[Totally agree with your summation, John.  I tried to put this point above at post 21 and others.

Just a few other facts that don&#039;t fit the above article.
Melbourne&#039;s summer of 2008/9 is often being quoted as the hottest and driest on record.  Someone forgot to check 1897/8 which was both a hotter and drier summer than 08/09 - 
and all this was without the benefit of high levels of CO2. 

Barry wrote at reply 49:-

 &quot;....- South Australia’s average temperature has warmed ~1C over the last century&#039;.
 30 year statistics show 1911-40 had an av max temp of 22.1  and min temp of 12.0.
The average temp for Kent Town (1977-2009) is av max temp 22.2 and av min temp 12.2.
Source:BoM

Hardly 1C degree of warming since then.
I hope he does better against Ian Plimer tonight in Adelaide.]]></description>
		<content:encoded><![CDATA[<p>Totally agree with your summation, John.  I tried to put this point above at post 21 and others.</p>
<p>Just a few other facts that don&#8217;t fit the above article.<br />
Melbourne&#8217;s summer of 2008/9 is often being quoted as the hottest and driest on record.  Someone forgot to check 1897/8 which was both a hotter and drier summer than 08/09 &#8211;<br />
and all this was without the benefit of high levels of CO2. </p>
<p>Barry wrote at reply 49:-</p>
<p> &#8220;&#8230;.- South Australia’s average temperature has warmed ~1C over the last century&#8217;.<br />
 30 year statistics show 1911-40 had an av max temp of 22.1  and min temp of 12.0.<br />
The average temp for Kent Town (1977-2009) is av max temp 22.2 and av min temp 12.2.<br />
Source:BoM</p>
<p>Hardly 1C degree of warming since then.<br />
I hope he does better against Ian Plimer tonight in Adelaide.</p>
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		<title>By: Barry Brook</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-19424</link>
		<dc:creator><![CDATA[Barry Brook]]></dc:creator>
		<pubDate>Mon, 13 Jul 2009 05:47:31 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-19424</guid>
		<description><![CDATA[What a load of nonsense from John McLean! Is he trying to rescue some... oh wait, sorry, I&#039;ve been there, done that:

&lt;a href=&quot;http://bravenewclimate.com/2008/09/09/spot-the-recycled-denial-iv-–-climate-case-built-on-thin-foundation/&quot; rel=&quot;nofollow&quot;&gt;Spot the recycled denial IV – Climate case built on thin foundation&lt;/a&gt;

Back in the recycle bin you go.]]></description>
		<content:encoded><![CDATA[<p>What a load of nonsense from John McLean! Is he trying to rescue some&#8230; oh wait, sorry, I&#8217;ve been there, done that:</p>
<p><a href="http://bravenewclimate.com/2008/09/09/spot-the-recycled-denial-iv-–-climate-case-built-on-thin-foundation/" rel="nofollow">Spot the recycled denial IV – Climate case built on thin foundation</a></p>
<p>Back in the recycle bin you go.</p>
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		<title>By: John McLean</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-19205</link>
		<dc:creator><![CDATA[John McLean]]></dc:creator>
		<pubDate>Fri, 10 Jul 2009 09:20:57 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-19205</guid>
		<description><![CDATA[What a load of nonsense from Barry Brook!  Is he trying to rescue some research funding that doesn&#039;t seem so likely with a slump in temperatures?

Fact: Heatwaves are caused by slow moving or stationery pressure cells directing a stream of warm air.  In this instance it was a High off the northern coast of NSW that was pushing warm air into Victoria.  (Check the Bureau of Met archive of synoptic charts for the High pressure cell in question.)

Fact: The recurrence of a strong monsoonal pattern over northern Australia had displaced warm air into the Broken Hill region and this was the air moved pushed south and south easterly into Victoria.  The strong monsoon was due to a La Nina.  (Check the Bureau of Met website for weather observations for far western NSW, NW Victoria and across to Moomba in South Australia. Also check further north, over the Qld border and you&#039;ll find that temperatures were lower there than around Broken Hill.)

Hey Barry!  Why didn&#039;t you quote from the introduction of that BoM report?  You must know the part you (conveniently?) omitted ....&lt;i&gt;The presence of a slow-moving high pressure system in the Tasman Sea, combined with an intense tropical low off the northwest coast of Western Australia and an active monsoon trough, provided the ideal conditions for hot air of tropical origin to be directed over the southern parts of the continent.&lt;/i&gt;

Well Barry?  Why didn&#039;t you mention this?  Didn&#039;t suit your agenda?  I could ask you to show more integrity in future but I suspect that would be to no avail.]]></description>
		<content:encoded><![CDATA[<p>What a load of nonsense from Barry Brook!  Is he trying to rescue some research funding that doesn&#8217;t seem so likely with a slump in temperatures?</p>
<p>Fact: Heatwaves are caused by slow moving or stationery pressure cells directing a stream of warm air.  In this instance it was a High off the northern coast of NSW that was pushing warm air into Victoria.  (Check the Bureau of Met archive of synoptic charts for the High pressure cell in question.)</p>
<p>Fact: The recurrence of a strong monsoonal pattern over northern Australia had displaced warm air into the Broken Hill region and this was the air moved pushed south and south easterly into Victoria.  The strong monsoon was due to a La Nina.  (Check the Bureau of Met website for weather observations for far western NSW, NW Victoria and across to Moomba in South Australia. Also check further north, over the Qld border and you&#8217;ll find that temperatures were lower there than around Broken Hill.)</p>
<p>Hey Barry!  Why didn&#8217;t you quote from the introduction of that BoM report?  You must know the part you (conveniently?) omitted &#8230;.<i>The presence of a slow-moving high pressure system in the Tasman Sea, combined with an intense tropical low off the northwest coast of Western Australia and an active monsoon trough, provided the ideal conditions for hot air of tropical origin to be directed over the southern parts of the continent.</i></p>
<p>Well Barry?  Why didn&#8217;t you mention this?  Didn&#8217;t suit your agenda?  I could ask you to show more integrity in future but I suspect that would be to no avail.</p>
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		<title>By: pete</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-17491</link>
		<dc:creator><![CDATA[pete]]></dc:creator>
		<pubDate>Sun, 21 Jun 2009 23:43:25 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-17491</guid>
		<description><![CDATA[Argument: Warming is bad.
Fact: History shows warming is good. Rome rose to power during the Roman Warm Period. The Medieval Warm Period enabled the Renaissance. The Modern Warm Period gave rise to the US super power.


Yeck! I wouldn&#039;t go near that one as a benefit for global warming! lol]]></description>
		<content:encoded><![CDATA[<p>Argument: Warming is bad.<br />
Fact: History shows warming is good. Rome rose to power during the Roman Warm Period. The Medieval Warm Period enabled the Renaissance. The Modern Warm Period gave rise to the US super power.</p>
<p>Yeck! I wouldn&#8217;t go near that one as a benefit for global warming! lol</p>
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		<title>By: John A. Jauregui</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-16421</link>
		<dc:creator><![CDATA[John A. Jauregui]]></dc:creator>
		<pubDate>Tue, 09 Jun 2009 03:40:57 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-16421</guid>
		<description><![CDATA[Global Warming legislation just came out of committee.  World oil production is now in permanent decline.  What oil is left will provide us the only bridge we will have to what comes next.  I am asking myself, &quot;Why is the Democratic Party making this a TOLL BRIDGE with the passage of this new tax legislation?&quot;

The move to change legislative language from &quot;Global Warming&quot; to &quot;Climate Change&quot; confirms Congress&#039;s acknowledgement that the planet is now cooling and that the decline in solar activity is responsible for the &quot;Global Cooling&quot; we are now feeling.

Dubious?  Google &quot;IPCC Global Warming Potential (GWP)&quot; to find the real story on CO2 as an atmospheric trace gas contributing to warming.  Oh, by the way, what Prof. Mann&#039;s infamous hockey stick diagram Bristlecone proxy data shows conclusively is that nothing has done more to &quot;GREEN&quot; the planet over the past few decades than moderate sun-driven warming together with elevated levels of CO2, regardless of the source.  Increase atmospheric CO2, increase crop and forest production.  That&#039;s the bottom line.  It’s no accident that commercial greenhouse operators invest heavily in CO2 generators to boost the productivity of their fixed growing facilities.

Let’s review the arguments.

Argument: Warming is bad.
Fact:  History shows warming is good.  Rome rose to power during the Roman Warm Period.  The Medieval Warm Period enabled the Renaissance.  The Modern Warm Period gave rise to the US super power.

Argument:  CO2 causes warming.
Fact:  IPCC technical reports give CO2 a GWP of unity (1); lower than most trace gases by several orders of magnitude, particularly water vapor.

Argument:  People release CO2; therefore people are responsible for Global Warming.
Fact:  A review of the carbon cycle shows very clearly humans are responsible for only 3 percent of the CO2 entering our biosphere.  How high would fuel Cap&amp;Trade Taxes have to go for you to reduce your carbon fuels usage by 1/3?  2/3?  Think about it.  The result is in the noise, that is 1 or 2 percent reduction in CO2 production IF everyone on the planet complies.

Simple Fact:  World oil production has been on a plateau for 4 years.  That production has now rolled off into permanent decline.  Why put a crushing tax on it now?   …and why avoid the subject leading up to the vote on this toxic legislation?]]></description>
		<content:encoded><![CDATA[<p>Global Warming legislation just came out of committee.  World oil production is now in permanent decline.  What oil is left will provide us the only bridge we will have to what comes next.  I am asking myself, &#8220;Why is the Democratic Party making this a TOLL BRIDGE with the passage of this new tax legislation?&#8221;</p>
<p>The move to change legislative language from &#8220;Global Warming&#8221; to &#8220;Climate Change&#8221; confirms Congress&#8217;s acknowledgement that the planet is now cooling and that the decline in solar activity is responsible for the &#8220;Global Cooling&#8221; we are now feeling.</p>
<p>Dubious?  Google &#8220;IPCC Global Warming Potential (GWP)&#8221; to find the real story on CO2 as an atmospheric trace gas contributing to warming.  Oh, by the way, what Prof. Mann&#8217;s infamous hockey stick diagram Bristlecone proxy data shows conclusively is that nothing has done more to &#8220;GREEN&#8221; the planet over the past few decades than moderate sun-driven warming together with elevated levels of CO2, regardless of the source.  Increase atmospheric CO2, increase crop and forest production.  That&#8217;s the bottom line.  It’s no accident that commercial greenhouse operators invest heavily in CO2 generators to boost the productivity of their fixed growing facilities.</p>
<p>Let’s review the arguments.</p>
<p>Argument: Warming is bad.<br />
Fact:  History shows warming is good.  Rome rose to power during the Roman Warm Period.  The Medieval Warm Period enabled the Renaissance.  The Modern Warm Period gave rise to the US super power.</p>
<p>Argument:  CO2 causes warming.<br />
Fact:  IPCC technical reports give CO2 a GWP of unity (1); lower than most trace gases by several orders of magnitude, particularly water vapor.</p>
<p>Argument:  People release CO2; therefore people are responsible for Global Warming.<br />
Fact:  A review of the carbon cycle shows very clearly humans are responsible for only 3 percent of the CO2 entering our biosphere.  How high would fuel Cap&amp;Trade Taxes have to go for you to reduce your carbon fuels usage by 1/3?  2/3?  Think about it.  The result is in the noise, that is 1 or 2 percent reduction in CO2 production IF everyone on the planet complies.</p>
<p>Simple Fact:  World oil production has been on a plateau for 4 years.  That production has now rolled off into permanent decline.  Why put a crushing tax on it now?   …and why avoid the subject leading up to the vote on this toxic legislation?</p>
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		<title>By: The Great Global Warming Swindle - Page 2 - Just Commodores</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-11922</link>
		<dc:creator><![CDATA[The Great Global Warming Swindle - Page 2 - Just Commodores]]></dc:creator>
		<pubDate>Sun, 19 Apr 2009 06:02:50 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-11922</guid>
		<description><![CDATA[[...] response from the &quot;but the arsonists light the fire&quot; brigade.  Perhaps have a look at: Heatwave update and open letter to the PM BraveNewClimate.com  What will it take to convince people like Stealthy(yes what evidence would satisfy your strigent [...]]]></description>
		<content:encoded><![CDATA[<p>[...] response from the &quot;but the arsonists light the fire&quot; brigade.  Perhaps have a look at: Heatwave update and open letter to the PM BraveNewClimate.com  What will it take to convince people like Stealthy(yes what evidence would satisfy your strigent [...]</p>
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		<title>By: Ian George</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8571</link>
		<dc:creator><![CDATA[Ian George]]></dc:creator>
		<pubDate>Wed, 11 Mar 2009 19:47:28 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8571</guid>
		<description><![CDATA[Despite the hot weather over the past 2 months, national average temps have not been exceptional.  Jan maximum averages were the 28th lowest in 60 years and min averages were only 16th on record.  Feb max av were 22nd highest on record and min 16th on record for Feb. The national 2008/9 summer max averages were below average.  The hot southern temps were balanced by the coolest weather in the northern Aust since  1984/1990.  
Perps  Have a nice holiday.]]></description>
		<content:encoded><![CDATA[<p>Despite the hot weather over the past 2 months, national average temps have not been exceptional.  Jan maximum averages were the 28th lowest in 60 years and min averages were only 16th on record.  Feb max av were 22nd highest on record and min 16th on record for Feb. The national 2008/9 summer max averages were below average.  The hot southern temps were balanced by the coolest weather in the northern Aust since  1984/1990.<br />
Perps  Have a nice holiday.</p>
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	<item>
		<title>By: perps</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8518</link>
		<dc:creator><![CDATA[perps]]></dc:creator>
		<pubDate>Wed, 11 Mar 2009 05:04:11 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8518</guid>
		<description><![CDATA[I am off on holiday for 3 weeks so that&#039;s it from me until April. Barry,please keep this great blog going. I look forward to rejoining the fray.]]></description>
		<content:encoded><![CDATA[<p>I am off on holiday for 3 weeks so that&#8217;s it from me until April. Barry,please keep this great blog going. I look forward to rejoining the fray.</p>
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	<item>
		<title>By: perps</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8517</link>
		<dc:creator><![CDATA[perps]]></dc:creator>
		<pubDate>Wed, 11 Mar 2009 05:01:34 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8517</guid>
		<description><![CDATA[Ian - I guess we will have to agree with Geoff Russell @68 and wait and see what the future brings. Let us hope that the weather gods are kind:)]]></description>
		<content:encoded><![CDATA[<p>Ian &#8211; I guess we will have to agree with Geoff Russell @68 and wait and see what the future brings. Let us hope that the weather gods are kind:)</p>
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		<title>By: Ian George</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8463</link>
		<dc:creator><![CDATA[Ian George]]></dc:creator>
		<pubDate>Tue, 10 Mar 2009 21:25:29 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8463</guid>
		<description><![CDATA[Perps   Although I agree instrumentation and record keeping may not have been to the standard of post 1910, there are also many gaps in records in the past 50 years from many stations. By dismissing pre-1910 data, the BOM can therefore really only look at the past 100 years.  So can we now dismiss the Federation drought, the heatwaves of early 1906 and 1908, the heatwave in 1895 which killed +400 people and the lowest intensity cyclone (Mahini) which killed over 400 people in 1899 because records cannot be verified?    

I do agree that temps have trended up over the past 150 years.  However that didn&#039;t stop extreme temps and weather happening in the cooler times.]]></description>
		<content:encoded><![CDATA[<p>Perps   Although I agree instrumentation and record keeping may not have been to the standard of post 1910, there are also many gaps in records in the past 50 years from many stations. By dismissing pre-1910 data, the BOM can therefore really only look at the past 100 years.  So can we now dismiss the Federation drought, the heatwaves of early 1906 and 1908, the heatwave in 1895 which killed +400 people and the lowest intensity cyclone (Mahini) which killed over 400 people in 1899 because records cannot be verified?    </p>
<p>I do agree that temps have trended up over the past 150 years.  However that didn&#8217;t stop extreme temps and weather happening in the cooler times.</p>
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	<item>
		<title>By: perps</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8403</link>
		<dc:creator><![CDATA[perps]]></dc:creator>
		<pubDate>Tue, 10 Mar 2009 05:59:24 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8403</guid>
		<description><![CDATA[http://www.bom.gov.au/climate/how/newproducts/IDCtemps.shtml

&quot;The commencement date of the stations varies, with the earliest records of temperature beginning in Melbourne in 1855. The mean length of record is approximately 20 years&quot;]]></description>
		<content:encoded><![CDATA[<p><a href="http://www.bom.gov.au/climate/how/newproducts/IDCtemps.shtml" rel="nofollow">http://www.bom.gov.au/climate/how/newproducts/IDCtemps.shtml</a></p>
<p>&#8220;The commencement date of the stations varies, with the earliest records of temperature beginning in Melbourne in 1855. The mean length of record is approximately 20 years&#8221;</p>
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	<item>
		<title>By: perps</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8401</link>
		<dc:creator><![CDATA[perps]]></dc:creator>
		<pubDate>Tue, 10 Mar 2009 05:50:58 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8401</guid>
		<description><![CDATA[Ian - BOM doesn&#039;t agree with you re instrumentation in the pre 1910 era- see 65 above. It is difficult to assess the accuracy of temps from that period as it appears widespread and detailed records were not kept - thus the CO2 level measurements are also in doubt. Anyway we are talking about overall global temperature as trending up not localised.]]></description>
		<content:encoded><![CDATA[<p>Ian &#8211; BOM doesn&#8217;t agree with you re instrumentation in the pre 1910 era- see 65 above. It is difficult to assess the accuracy of temps from that period as it appears widespread and detailed records were not kept &#8211; thus the CO2 level measurements are also in doubt. Anyway we are talking about overall global temperature as trending up not localised.</p>
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		<title>By: Ian George</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8344</link>
		<dc:creator><![CDATA[Ian George]]></dc:creator>
		<pubDate>Mon, 09 Mar 2009 20:00:12 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8344</guid>
		<description><![CDATA[Although temps have trended upwards over the past 40 years, Adelaide&#039;s average summer temps during the period 1897 to 1908/9 (Federation drought) were higher than the summer period 1997 to  2008/9 (recent drought).  Since most of the recent records have been set in the summer months, I have no explanation for this earlier summer period being warmer as CO2 levels were less than 300ppm and the first global warming surge didn&#039;t start  until  1910.
 Arguably, Melbourne&#039;s hottest day was on 6th Feb, 1851 with 47.2C.  See

http://home.iprimus.com.au/foo7/fire1851.html   (scroll down to Melbourne &quot;Argus&quot; newspaper report)

Perps The mercury thermometer was invented by Fahrenheit in 1724 and the Melbourne Met Office began official records in 1855 so the thermometer used in 1851 wpuld be reasonably accurate.]]></description>
		<content:encoded><![CDATA[<p>Although temps have trended upwards over the past 40 years, Adelaide&#8217;s average summer temps during the period 1897 to 1908/9 (Federation drought) were higher than the summer period 1997 to  2008/9 (recent drought).  Since most of the recent records have been set in the summer months, I have no explanation for this earlier summer period being warmer as CO2 levels were less than 300ppm and the first global warming surge didn&#8217;t start  until  1910.<br />
 Arguably, Melbourne&#8217;s hottest day was on 6th Feb, 1851 with 47.2C.  See</p>
<p><a href="http://home.iprimus.com.au/foo7/fire1851.html" rel="nofollow">http://home.iprimus.com.au/foo7/fire1851.html</a>   (scroll down to Melbourne &#8220;Argus&#8221; newspaper report)</p>
<p>Perps The mercury thermometer was invented by Fahrenheit in 1724 and the Melbourne Met Office began official records in 1855 so the thermometer used in 1851 wpuld be reasonably accurate.</p>
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		<title>By: perps</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8294</link>
		<dc:creator><![CDATA[perps]]></dc:creator>
		<pubDate>Mon, 09 Mar 2009 06:03:26 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8294</guid>
		<description><![CDATA[Geoff @ 68
Agreed! Hwever the temperature is still trending upwards which makes the newest &quot;records&quot; more compelling.]]></description>
		<content:encoded><![CDATA[<p>Geoff @ 68<br />
Agreed! Hwever the temperature is still trending upwards which makes the newest &#8220;records&#8221; more compelling.</p>
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		<title>By: A question to ask</title>
		<link>http://bravenewclimate.com/2009/02/10/heatwave-update-and-open-letter-to-the-pm/#comment-8286</link>
		<dc:creator><![CDATA[A question to ask]]></dc:creator>
		<pubDate>Mon, 09 Mar 2009 04:43:38 +0000</pubDate>
		<guid isPermaLink="false">http://bravenewclimate.com/?p=1048#comment-8286</guid>
		<description><![CDATA[[...] the nightmarish conditions of much of Australia in February 2009, this item from Barry Brook at BraveNewClimate.COM is worth pondering “Given that this was the hottest day on record on top [...]]]></description>
		<content:encoded><![CDATA[<p>[...] the nightmarish conditions of much of Australia in February 2009, this item from Barry Brook at BraveNewClimate.COM is worth pondering “Given that this was the hottest day on record on top [...]</p>
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