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Post by sigurdur on Jan 15, 2014 0:03:15 GMT
Doug: About as smart as planning vigorous outdoor activity in Arizona in July and August. Glad you are able to stay cool.
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Post by cuttydyer on Jan 17, 2014 10:32:07 GMT
Point taken, but I have no idea where I would find that information. The surprise was the lateness of the frosts. Canberra tends to have a pretty low humidity anyhow - it is backing on the central/western plains of NSW, which are generally quite dry, and on the prevailing wind side. Even in Melbourne, in summer with a hot Northerly humidity can reach extremely low levels. Doug, Thought this may be of interest to you: The article investigates how tropical lows in Australia’s west affects the weather as far away as south-eastern Australia. Link: theconversation.com/whats-cranking-up-the-heat-across-south-eastern-australia-21216----------------------------------------------------------------- Steven Goddard has dedicated quite a few blog entries to the "unprecedented heat"; example: January 5, 1906 – Mildura Reached 50C (That was 6C warmer than today’s unprecedented heat) Link: trove.nla.gov.au/ndp/del/article/44488852Link: stevengoddard.wordpress.com/2014/01/16/january-5-1906-mildura-reached-50c/
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Post by douglavers on Jan 17, 2014 10:59:15 GMT
Thanks for that.
What it seemed to boil [?] down to, was that strong North winds in Summer bring in heat from the central deserts.
A corollary to this is terrible fires. These are frequently sparked by dry electrical storms.
It looks like several small towns in the Grampians are in danger of destruction. 100k plus winds, temperatures above 40, lead to unstoppable fires.
We have not enjoyed two 44 degC days in a row. This makes four above 40 in a row in Melbourne.
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Post by Ratty on Jan 18, 2014 11:22:27 GMT
Meanwhile, up North where I live we are struggling to make 30C; my nearest station (Redcliffe, coastal) didn't make it to 28C.
Darwin (Lat: -12.42 Lon: 130.89 Height: 30.4m), several thousand kilometers North of Melbourne, didn't make it to 30C today.
I remember many very hot days in Melbourne in the 1970s when I was stationed there in the air force.
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Post by Ratty on Jan 18, 2014 11:46:35 GMT
I've downloaded the figures for Melbourne ( 1855-present) The data (.CSV file) starts recording in 1855 but the text file (IDCJAC0010_086071_1800_Note.txt) that accompanies the download says: ** Station Details **
Bureau of Meteorology station number: 86071 Station name: MELBOURNE REGIONAL OFFICE Year site opened: 1908 Year site closed: Latitude (decimal degrees, south negative): -37.81 Longitude (decimal degrees, east positive): 144.97 Height of station above mean sea level (metres): 31 State: VICI've read that Australian climate records are in a bad way ..... this appears to verify. Anyway, what I wanted to post is the graph I created from the Melbourne data (max temps): This is the location: Melbourne BOM Regional Office ... slap bang in the CBD of a city of more than four million people! Maybe a degree over 160 years with UHI? Edit: Speaking of UHI, I had saved this URL ( UHI) from Melbourne University. No longer works ...... sigh.
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Post by sigurdur on Jan 18, 2014 15:09:02 GMT
Ratty: No question that there would have to be some UHI effect on this one. There is a lot of pure black surrounding that temp sensor.
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Post by sigurdur on Jan 18, 2014 15:18:44 GMT
Ratty: We always knew you were a cool fellow.....
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Post by Ratty on Jan 19, 2014 1:49:11 GMT
Ratty: We always knew you were a cool fellow..... It's not always recognised though, Sig.
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Post by Andrew on Jan 21, 2014 11:29:35 GMT
I invite you to get that bucket of water at 0.01C, cool it down freezing the contents, and report the amount of warm air released. There are nice sensitive infrared cameras that you could perhaps hire from the industry for the purpose. Not surprisingly, neither Numerouno or myself were imagining at the time of the warmth appearing on camera, you were thinking of cooling the bucket to be frozen solid by placing the bucket in a very large volume of cold air that was insulated from the environment. We were both imagining that like the DMI data, the air was cooling along with the bucket of water at 0.01C So for the record can you confirm you expect no warm air to appear at the freezing point when the bucket of water is placed into an environment of cold air that is cooling as in the DMI data? Or in keeping with the DMI data perhaps you can design a bucket experiment where you would be able to video warm air appearing when the DMI data shows a previously falling temperature?
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Post by douglavers on Feb 9, 2014 10:58:13 GMT
Exactly five years on from Black Saturday, when 173 people died, Victoria is burning again.
Bone dry and hot conditions, 90 kph winds, and the world's most inflammable vegetation.
We could use some of the rain coming down in Europe.
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