Page 58 of 61 < 1 2 ... 56 57 58 59 60 61 >
Topic Options
#1486972 - 25/01/2019 18:03 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
pete28 Offline
Weatherzone Addict

Registered: 08/01/2007
Posts: 1164
Loc: Christchurch, New Zealand
Blair do you think there is any credibility in the latest claims that the 49.1C by Red Rock Point on Wednesday is the hottest temperature ever recorded at a coastal location next to an open ocean (within 100m of the sea) in the world?

Top
#1487019 - 25/01/2019 21:36 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17662
Loc: NE suburbs, Adelaide, South Au...
It would have to be accurate wouldn't it? Where else could get anywhere near it? Cant think of anywhere else in the world, maybe Ceduna here?

Top
#1487055 - 26/01/2019 08:09 Re: Will we see 50 degrees celsius again in Australia [Re: teckert]
Rigger Offline
Weather Freak

Registered: 15/11/2008
Posts: 143
Loc: Leanyer,NT (suburb of Darwin)
Originally Posted By: teckert
It would have to be accurate wouldn't it? Where else could get anywhere near it? Cant think of anywhere else in the world, maybe Ceduna here?


You would think somewhere along the Red Sea coast would record that some years ? Kuwait City comes to mind....

Top
#1487062 - 26/01/2019 08:39 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
Mike Hauber Offline
Weatherzone Addict

Registered: 13/07/2007
Posts: 3711
Loc: Buderim
Dhahran Saudi Arabia has a record high temperature of 49.5.

This location has the world record for highest dew point anywhere which is why I thought to look it up.

Top
#1487069 - 26/01/2019 09:15 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
pete28 Offline
Weatherzone Addict

Registered: 08/01/2007
Posts: 1164
Loc: Christchurch, New Zealand
Next to Ďopen oceaní is the key word so places like Kuwait etc donít count

Top
#1487126 - 26/01/2019 12:48 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
Blair Trewin Offline
Weatherzone Addict

Registered: 13/07/2001
Posts: 3944
Loc: Melbourne, Australia
Obviously depends on how you define the 'open ocean' - but the person making the claim knows what he's doing.

Top
#1487218 - 26/01/2019 22:27 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17662
Loc: NE suburbs, Adelaide, South Au...
errr did Moomba break the Aust minimum record this morning? Looks like it! Surprised we havent heard anything about it.

edit: well I see it did, but then Borrona Downs beat it at 36.6


Edited by teckert (26/01/2019 22:31)

Top
#1487275 - 27/01/2019 08:28 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 2701
Loc: Toronto N.S.W
50 is a tough nut to crack in Australia. Why is that? Given the enormous desert and arid zones occupying so much land area.
_________________________
Land Ahoy! Ooops!

Top
#1487342 - 27/01/2019 13:02 Re: Will we see 50 degrees celsius again in Australia [Re: Knot]
Tom Offline
Weather Freak

Registered: 26/06/2004
Posts: 75
Loc: Elwood, Victoria
At least partly it would have to do with the elevation of large parts of the Australian interior.

Top
#1487357 - 27/01/2019 14:45 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
Blair Trewin Offline
Weatherzone Addict

Registered: 13/07/2001
Posts: 3944
Loc: Melbourne, Australia
Indeed it does. If you use the standard dry air lapse rate of 1 C/100m, large parts of the Australian continent have a record high sea level equivalent close to 51, with the highest being just over 53.

Top
#1487395 - 27/01/2019 19:09 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
Tom Offline
Weather Freak

Registered: 26/06/2004
Posts: 75
Loc: Elwood, Victoria
Whatís the highest altitude 50C temperature thatís been recorded, I wonder?

Top
#1487433 - 27/01/2019 21:05 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 2701
Loc: Toronto N.S.W
Interesting points. Australia has the lowest averaged landmass height of the continents but i guess its the elevation of the heat generating areas that is important. Hence South America has no recorded 50. Has some deserts but very high elevation. 2 out of the 3 officially recognised highest recorded temps are from areas below sea level ( Death Valley & Tirat Tzvi). The Kuwait 54 is from a site about 20metres asl. Australia has around 8500km2 of territory below sea level in SA mostly I think.


Edited by Knot (27/01/2019 21:11)
_________________________
Land Ahoy! Ooops!

Top
#1487446 - 27/01/2019 21:51 Re: Will we see 50 degrees celsius again in Australia [Re: Tom]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 2701
Loc: Toronto N.S.W
Originally Posted By: Tom
Whatís the highest altitude 50C temperature thatís been recorded, I wonder?


This Wikipedia page has stats about record temps per country. There is a 51.3 in Algeria at an elevation of approx 1300 metres. Some of the temps listed aren't officially recognised I think. https://en.m.wikipedia.org/wiki/List_of_countries_by_extreme_temperatures
_________________________
Land Ahoy! Ooops!

Top
#1487651 - 29/01/2019 11:59 Re: Will we see 50 degrees celsius again in Australia [Re: TranslucidusW]
Markus Offline
Weatherzone Moderator

Registered: 02/12/2010
Posts: 2259
Loc: Clare, SA
It would be incredibly interesting to set up an AWS on the shores of Lake Eyre, or even one of those portable AWS's out on the lake when it is dry, during the hottest parts of the year. You'd have to think in the heatwaves we've had this year, multiple 50 degree days have occurred and maybe even 51+ degrees. I wonder what effect the salty whiteish surface would have on the temperature, whether it would reflect light up and under the AWS raising the temperature in the Stevenson screen, or whether the lake reflecting as a whole would push the temperature down a little, something I've sometimes wondered.
_________________________
My Blogging site.

http://markdawsonphoto.wordpress.com/

Top
#1487654 - 29/01/2019 12:55 Re: Will we see 50 degrees celsius again in Australia [Re: Markus]
Tom Offline
Weather Freak

Registered: 26/06/2004
Posts: 75
Loc: Elwood, Victoria
I'm not sure about the effects of reflection on high temperatures. I do recall when I was living in Wisconsin in the USA that when we had a large scale snow event, the weather would be cooler for an extended time because of the additional reflection from the snow, preventing radiative heating - the Albedo effect. Reflection also apparently affects the accuracy of temperature readings, even in a properly built weather station, particularly with low wind speeds.

So just how comparable are the temperature readings taken in different locations around the world, even when recorded using up to date equipment and configuration of weather stations?

Top
#1487660 - 29/01/2019 13:48 Re: Will we see 50 degrees celsius again in Australia [Re: Tom]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 2701
Loc: Toronto N.S.W
Originally Posted By: Tom


So just how comparable are the temperature readings taken in different locations around the world, even when recorded using up to date equipment and configuration of weather stations?

I could be in error about this, but I think there are differences in how met bureaus around the world average out readings per minute recorded by AWS. The WMO may have guidlines about it i suppose. E.g If NZ met averaged out 60 readings per minute it would be different to Mongolians were averaging 15 per minute using data at 4 sec intervals.
_________________________
Land Ahoy! Ooops!

Top
#1487750 - 29/01/2019 20:40 Re: Will we see 50 degrees celsius again in Australia [Re: Knot]
Jac0b Offline
Weather Freak

Registered: 17/12/2018
Posts: 103
As far as I'm aware BOM takes one-second spot readings but doesn't average.

It would be very interesting to compare the old mercury and alcohol thermometers that were used before the late 1990's and the new AWS now.

Maybe have an AWS and an old style thermometer running parallel and do a comparison. That would be very useful.

Top
#1487751 - 29/01/2019 20:56 Re: Will we see 50 degrees celsius again in Australia [Re: Jac0b]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 2701
Loc: Toronto N.S.W
Originally Posted By: Jac0b
As far as I'm aware BOM takes one-second spot readings but doesn't average.

It would be very interesting to compare the old mercury and alcohol thermometers that were used before the late 1990's and the new AWS now.

Maybe have an AWS and an old style thermometer running parallel and do a comparison. That would be very useful.


The Bureau Of Muffology has been there done that. But you won't find the comparison data I believe.
_________________________
Land Ahoy! Ooops!

Top
#1487758 - 29/01/2019 21:34 Re: Will we see 50 degrees celsius again in Australia [Re: Blair Trewin]
Rigger Offline
Weather Freak

Registered: 15/11/2008
Posts: 143
Loc: Leanyer,NT (suburb of Darwin)
Quote from Blair a few years ago re the possibility of 50c+ temps in or around Lake Eyre

Originally Posted By: Blair Trewin
I'm not so sure. Lake Eyre is 50-70 metres lower than Marree, Moomba and Birdsville, so there's no particular reason to expect that it would reach values more than 0.5-1 degrees higher than occur at those sites. (Extreme high maximum temperatures, away from coasts, tend to be pretty spatially coherent with a lapse rate of around 1 degree per 100 metres).

Top
#1487811 - 30/01/2019 09:50 Re: Will we see 50 degrees celsius again in Australia [Re: Jac0b]
Blair Trewin Offline
Weatherzone Addict

Registered: 13/07/2001
Posts: 3944
Loc: Melbourne, Australia
Originally Posted By: Jac0b
As far as I'm aware BOM takes one-second spot readings but doesn't average.

It would be very interesting to compare the old mercury and alcohol thermometers that were used before the late 1990's and the new AWS now.

Maybe have an AWS and an old style thermometer running parallel and do a comparison. That would be very useful.


Ask and you shall receive:

http://www.bom.gov.au/research/publications/researchreports/BRR-032.pdf

(Section 4 is the place to go).

Spoiler: no significant difference.

Top
Page 58 of 61 < 1 2 ... 56 57 58 59 60 61 >


Who's Online
8 registered (mysteriousbrad, ashestoashes, crikey, Ben K, LonnyDave, Adaminaby Angler, Aussea, 1 invisible), 68 Guests and 3 Spiders online.
Key: Admin, Global Mod, Mod
Today's Birthdays
Darkside, deadgoon, Littlevic
Forum Stats
29914 Members
32 Forums
24132 Topics
1524098 Posts

Max Online: 2985 @ 26/01/2019 12:05
Satellite Image