A collection of 3 videos with very low view count, so likely being hidden by the “AlGore-ithm changes” at YouTube / Google.
I found them via another method (that I’ll not point out since last time I pointed out how to get InfoWars that way it got taken down… the “other side” if full of slimy weasels…) and then had to do a few strongly directed searches to get them to “pop” even using DuckDuckGo.
First up, an interesting video interview with Peter Ridd, who has since won his legal battle with the University. It is an interesting insight into the fellow (and the corrupt administration taking over Universities globally). 11 minutes.
Then, two videos with Jennifer Marohasey where she points out the removal of cold values from the current record and the “cooling the past” in the latest Australian BOM data set release. I guess it is time I downloaded the Australian data directly…
From Sky Australia, who seem to have their head on straight (unlike Sky UK). 9 minutes.
Also 9 minutes:
I think those are some very good pointers into “how the deed is done”. Set a “QA” limit that keeps out any current cold events of note, then homogenize in a higher average (and any average must be higher than a cold end of the range) and call it done.
Still unclear is exactly how ‘the past is cooled’, but I’d expect something similar.
As all the “Climate Science” folks share code, ideas, and junkets to Paris & Copenhagen & Brazil and…
I would expect something similar is being done at Hadley and NCDC / NCIE / NOAA / whatever name change they are hiding behind today in the USA.
Then the idea that changing the instrument when it doesn’t lie the way you want is a good idea, well, that’s just daft. But, it looks like there will be a whole lot of changes of instruments as this cold cycle deepens…
Musings from the Chiefio 
EM : Three excellent videos ! And ones that I was not aware of at all even though I was aware of the issues outlined in them. A couple fo update comments
1; Professor Peter Ridd’s unfair dismissal case went before the Australian Federal Court in Brisbane in April with Judge Vasta. There was a three day hearing. He handed down his judgement on all 17 issues of law for which evidence was presented. He found for Peter Ridd on all 17 issues.
James Cook University has announce it will appeal Judge Vasta’s judgements …So this case is still ongoing. But it is definitely very very apparent that JCU has trashed it’s own international scientific reputation & credibility in the major area of claimed scientific expertise..
An aside note : JCU is in North Qld based at Townsville : The recent election results for Qld saw a complete rejection by Queenslanders of the global warming BS about mining and the Great Barrier reef. The Labor Green front hold hardly any seats in the Australian parliament North of Brisbane. It was a total wipeout. And a rejection of Greenist BS. )
2: The issue of the Bureau of Misinformation ( BOM ) ‘adjusting’ the raw data of it’s entire network of hundreds of weather stations across Australia, is a major problem. BOM can no longer be trusted. It is pursuing as a matter of ‘policy’ methodologies which promote it’s Global Warming ideology. The extent of this faking the data is partially presented in posts here :https://kenskingdom.wordpress.com/2019/05/20/acorn-sat-2-0-nation-wide-summary/
I say partially because Ken merely compares the ACORN 1 and ACORN 2 adjusted temperature ‘data’ sets. A more complete comparison would start by comparing the raw recorded temperatures across Australia (where available ) with BOM’s ACORN 2 stuff, which purports to show increasing minimum and maximum temperatures all across the Australian continent…
3 : Here is a purely local perspective about temperatures here at Mt Barker in the Adelaide Hills.The last 2 mornings there has been a frost here. On the ground and on my car’s windows. I do not live in a ‘frost hollow’. In fact my home is on the steep hill and cold air usually tends to fall down the hill. And there are no obstacles blocking the flow of the cold air. Thus it is clear that this cold air is general across the area.
An even more curious point : frosts are common here when there is NO cloud cover at night. That’s when we lose heat into the clear night sky. But the past two nights have both been cloudy – not clear. So these frosts are not the result of losing heat into the atmosphere. But a result of general of cold air mass present in the area.
I will check the BOM’s temperature records for Mt Barker later today when it is available. But I fully expect to see a minimum temperature 3 degrees above freezing. That is what the BOM has been predicting on it’s weather guide for Mt Barker.
“Still unclear is exactly how ‘the past is cooled’, but I’d expect something similar.”
BoM is very brazen about this – Rutherglen record changed from downward trend to upward trend. About 3C change in trend!
BoM say “all adjustments average to zero”, but they are talking about the adjustments at a single point in time, not the trend – the trend is definately distorted by these adjustments.
Incidentally, there is also evidence that BoM used thermometers that only go to -10C – in places where historical data shows lows often go below this number. Warming with no adjustments, neat, eh? No “adjustment” required to fake a warming!
Oh, and they say that the adjustments in the 2 ACORN data sets are made so that “the past” is being compared directly to “the present” – different measurement systems, see? Oddly enough, they also say that the “new” stuff has been designed and tested to mimmick the “old”. Makes you wonder why they need to adjust then,eh?
Here is BOM’s chart for this months minimum temperatures. It says yesterday was 0.0 degrees
while this morning with a harder frost was 1 degree.
http://www.bom.gov.au/jsp/ncc/cdio/weatherData/av?p_nccObsCode=123&p_display_type=dailyDataFile&p_startYear=&p_c=&p_stn_num=023733
Bill in Oz:
Forget the BoM figures. They’ve been fiddling the Mt. Barker figures for at least 2 years.
Also Mt. Lofty which most TV stations report as the previous minimum for the Adelaide Hills then forecast for Mt. Barker. That way you can’t compare forecast with “actual”.
Further, Mt. Lofty often has higher minimums (and occasion maximums) which means air must be getting warmer as the altitude increases (not something that orthodox science agrees on).
Here at Woodside (15 kilometres away) yesterday was colder than this morning (minus 0.6 v 1.0℃). Also heavy ice on car windows and other places (birdbath etc.) yesterday whereas this morning was lacking ice. I too live on a hill so both mornings looking down on the fields below all white as also the house roof across the road & below my level. According to the old-timers Woodside should have a minimum 2℃ below Mt. Barker with a similar maximum, but then they did their own temperature measuring.
E.M.S. there are 2 Mt. Barkers, this one in S.A. and the other in W.A. (named after the same man).
@Graeme, thanks for that note ! Yes I knew there are two Mt Barker.The one in WA was named after the one here by 2 brothers who grew up here at Mt Barker SA and went there to farm.
Back in 2000-2001 I lived at Lenswood. It was definitely colder there in Winter that here in Mt Barker.. And that is close to Woodside.
Here at Mt Barker the weather station is in the grounds of the Telstra station. And that is in the middle of town. And so subject to urban heat island effect. I doubt that it will ever ‘register’ a minus 2 degrees ever again, not now with Mt Barker having 18,000 people, even if it is solid frosted ground 3-4 Ks away outside town !
But one good thing. Mt Barker is not one of the 112 weather stations all across Australia, which are part of the ACORN temperature series. All of those are adjusted ( homogenised ? ) as a matter of course
An update from Peter Ridd here in Australia. Interesting interview of Peter by the IPA.
Kneel, there is no case to change past temperatures. However, most people know about UHI (urban heat island). There is a strong case to reduce present temperatures measured in urban environments and at airports to allow for UHI and make comparison to the past. Also, instead to putting more sites at airports (which is convenient as measurements are required to warn pilots and make adjustments for instrument flight control), there should be more sites in rural or park locations which have conditions similar to those in the past. I have a outside temperature gauge in my Subaru SUV. I note just about every day UHI effect going from my domestic/rural area remnant sub-tropical forest area to the town centre (which used to be farm land 50 years ago) about 3km as the crow flies. On a clear night the temperature is upto 3C lower. at our place eg recently the temperature was 16C in town and at our place 13C. The town is actually at a higher elevation and in fact should be 1C lower in temperature than our place if the environment was the same.
@Cementafriend : The 112 weather stations which are included in the BOM’s ACORN list, do not include any places with UHI effect… Many of these places are deliberately chosen because they are small towns of rural localities to eliminate the UHI effect. When these stations are located at airports the airports hardly ever have significant jet plane flight landing ot taking off. There are just small propeller driven aircraft. ( I think Darwin is the only exception )
And therefore there is NO reason for any reduction of past temperatures …as you suggest….
Dear Alexander,
It’s now been over two months since the Federal Circuit Court ruled overwhelmingly in favour of Peter Ridd in his fight for academic freedom.
Since then, we’ve seen an explosion of media reporting on Australia’s crisis of free speech on campus, thanks in no small part to the widespread interest in Peter’s case.
Today I’m writing to let you know about an extended interview with Peter, conducted by Dr Chris Berg, Scott Hargreaves and myself as a special episode of the IPA’s *Looking Forward Podcast* .
In the interview, Peter talks extensively about climate science, the Great Barrier Reef and his long struggle with James Cook University. But the most sobering part of the interview was Peter’s frank assessment of the free speech crisis at Australia’s universities. Here are a couple of parts that I want to share with you:
I think [my case] demonstrates there actually is a crisis [of free speech], and the way you can tell there’s a crisis is the reaction of the universities…You see, for every Peter Ridd, there’s another few hundred people who would dearly love to have said something [controversial] but they’re just not…It’s actually that academic freedom definitely does not exist is the lesson that should be learnt from [my case].
I think the fundamental problem with the universities is that almost from top to bottom they’re full of the same type of people and we’ve got to get more genuine diversity of views in the universities. I think a certain type of person is attracted to academia and we need to get other people in there who have different views.
I hope you enjoy this special episode of *The Looking Forward Podcast * .
As always, thank you for your support.
Regards,
Gideon DONATE TO THE IPA’S 2019 END OF FINANCIAL YEAR APPEAL HERE Gideon Rozner Director of Policy Institute of Public Affairs T 0419 193 114 | 03 9600 4744 Level 2, 410 Collins Street, Melbourne, VIC , 3000 AU [image: Facebook] [image: Twitter] [image: YouTube] [image: Instagram]
This email was sent by: *Institute of Public Affairs* Level 2, 410 Collins Street, Melbourne, VIC , 3000 AU
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On Wed, 19 Jun 2019 at 6:30 pm, Musings from the Chiefio wrote:
> E.M.Smith posted: “A collection of 3 videos with very low view count, so > likely being hidden by the “AlGore-ithm changes” at YouTube / Google. I > found them via another method (that I’ll not point out since last time I > pointed out how to get InfoWars that way it got taken” >
Bill in Oz, there have been studies that show UHI affects in small towns with growth. Asphalt runways sans any planes can certainly show a UHI affect.
@David : How small are the towns in those studies ? Are they in Australia ? And what studies ? It’s hard to commnet when your own comment is so vague mate.
O T ? Have just awoken late after a good sleep in, to frost all over the grass and paddocks here at Mt Barker in South Australia. And it’s the sixth day of morning frosts since last Tuesday…Frozen pipes this morning as well
Now that’s a a real “Climate Emergency”. We urgently need lots more Gorebull warming here in the Adelaide Hills. Otherwise we will freeze this Winter..
(Sarc off )
Bill in Oz says: 23 June 2019 at 12:36 am
@David : How small are the towns in those studies ?
I remember Dr Roy Spencer conducting one ove at WUWT may years ago that showed that the initial increase in population had quite a large affect on UHI.
Stumbled across this while following ham radio links on twitter:
@ A C Osborn : That’s an interesting set of links. It’s good to be reminded of these studies of the impact of UHI effect on temperature records… Good !
However Roy focuses on the USA in his papers…With maybe . aside reference to Australia..
So I don’t feel that my queries are answered..
The continental USA is roughly the same size as Australia..But has a population of 370 million. By contrast Australia total population is 23 million…
AS the UHI effect is a reflection of what we humans do in our areas, I suggest that there is less impact in Oz. But do we want to go into the details of the BOM’s ACORN weather station list ?
@Bill in Oz:
Not as different as you might think. On my drive from Sydney to Back ‘O Bourke then back out to Melbourne, many places reminded me very strongly of my home State of Californua (right down to the 1800s buildings and 1900s suburbs) while the outback was very like Arizona in to West Texas with eucalyptus instead of palo verde and cactus…. Melbourne was so like San Francisco of 30 years prior that I didn’t want to leave (right down to the cable cars…)
The physics of UHI will be the same everywhere. Even in California, or the continent sized near twin of it in Australia.
My number one impression of Australia was that it was Califonia on a continental scale with different wildlife (though the Sierra Nevada / Cascades show up in New Zealand with Wellington another reminder of an older smaller San Francisco). We even have your eucalyptus everywhere.
So the finding that even the earliest smallest growth in a developing area has strong UHI while a very large fully developed area slows the rate of increase ( as it runs out of places to pave…) suggests Australia would have as much or more, while large US cities will be topped out.
BTW total population doesn’t matter to an instrument. What matters is local change. So the USA has a heck of a lot more instruments, but each one starts as a small town that grows and cares not about all the people in New York City…or L.A. while, for NYC & LA, the UHI gain tops out early in the record then flattens.
In my home town riding a motorcycle in the evening in the 1970s, UHI was very noticed. Several degrees. The population then was 3328. The town about 2 miles across (and before I could drive, I walked across it in all directions to see friends). UHI manifests on the small scale rather well.
@Larry L:
Nice video. A bit heavy on the “all cosmic rays” angle. Would be improved by adding in the physical effects of lower air column height (effectively moving mountain tops to a higher altitude… wonder if anyone saved barometric data from Denver airport or up the Hawaiian volcanoes….) and ignores the shift from UV blue rich to IR red rich changing where the energy is deposited in the oceans, deep vs prompt evaporation.
Someday folks will learn to look for multifactor and not just “THE cause”….
So does cloud albedo dominate? Would that not mean less rain not more? After all, less sun evaporating oceans…
How about more prompt evaporation AND more effective cloud formation leading to a faster water cycle with much more total water transport? At least until the oceans cool to some depth. Then with more of it as snow in the now barometrically higher mountains….
I think the multifactor fit is better…
Interesting question – are you talking about historic data pressure record?
You can get real time absolute station pressure for two locations from NCAR
This is the english units Mesa lab real time data. The station elevation is 1885 meters (6184 feet).
https://archive.eol.ucar.edu/cgi-bin/weather.cgi?site=ml&units=english
Also the foothills lab in Boulder. The station elevation is 1625 meters (5331 feet).
https://archive.eol.ucar.edu/cgi-bin/weather.cgi?site=fl&period=5-minute&units=english&&fields=tdry&fields=rh&fields=cpres0&fields=wspd&fields=wdir&fields=raina
https://www.cograilway.com/Summit/WeatheratSummitb.htm
CURRENT WEATHER CONDITIONS – Pikes Peak – 14,115 feet – 4302 meters
(some of following links are no longer working)
http://jonathanvigh.com/weather/pikes/pikes_peak_weather.htm
I have not drilled down in these links but I know they have daily balloon soundings which will record pressure at altitude above ground. Just not sure where to find them.
The data is also available as skew-T plots.
https://www.weather.gov/grb/ua
https://www.weather.gov/bou/obs_and_climate
https://w1.weather.gov/data/obhistory/KDEN.html
/https://journals.ametsoc.org/doi/pdf/10.1175/2009BAMS2852.1
https://www.ncdc.noaa.gov/cdo-web/
Ahhhh here is the gateway to the sounding data and skew T plots
https://www.spc.noaa.gov/exper/soundings/
E M Here is a map showing all the ACORN weather station sites. Some of these weather stations are in the midst of big cities; eg Sydney, Melbourne, Adelaide, Brisbane etc . But others are coated where there is no town or city at all.EG Cape Borda on Kangaroo Island, South Australia, Eucla on the Nullarbor plain in WA; or Laragoona in Tasmania; or Cape Otway in Victoria.. And there are others with are just tiny settlements ( 20-30 people ! ) For example Giles in NT, Meekathara in WA; Boullia in Qld or Tibooburra in NSW
http://www.bom.gov.au/climate/data/acorn-sat/stations/#/23090
I agree that UHI effect is a major problem in the climate record. But these exceptions in the BOM’s ACORN list offer an opportunity worth examining.
The Ken’sKingdom site I mentioned above gives lots of details about the sites.
@Larry:
The idea is to find out if there is a significant change in “barometric altitude” now vs say 1990.
The Solar Shift changed the atmospheric height, so is that limited to the “above the tropopause” altitudes, or does that compression of height extend to 12,000 feet, or 7,000 or 4,000 or…
Clearly at sea level it is still 1 Bar as all the air is still above you. At what point is the loss of air column height an actual effect on weather, if any? I figure if the average barometric pressure from 1980 to 1990 is one thing, and the average from 2008 to 2018 is lower, we’ve had a change of “barometric altitude” and you will get more snow as though you were higher up the mountain now.
Essentially, did the lapse rate change from the surface to, oh, 20,000 feet?
Re The ACORN weather station of BOM, I will spend some time listing them with notes about the character of the area they are in… It may clarify things a little.
And give us some idea of which BOM ACORN sites are to be completely ignored and which can be trusted – if they have not been fiddled with separately by BOM’s climate ‘experts”.
Here is a page on WUWT that discusses the December 2018 discovery that the ionosphere had gotten lower than expected:
That was the first time I realized such things were actually happening as the sun got quieter.
It makes me wonder if the thinner atmosphere (as a bed sheet is thinner than a quilt) cannot hold as much moisture, leading to precipitation events of greater quantities.
At the same time, as Robert Felix points out, underwater volcanoes heat the seas and cause greater evaporation…but it can’t stay in the atmosphere, so it has to fall as rain or snow. If it falls as snow and doesn’t melt, then wouldn’t we eventually see glaciers build and sea levels fall?
I’ll stop there for now.
Thanks for linking the Ridd firing and this amazing discussion:
The ideas presented are important. Ridd suggests that at least 50% of papers are wrong in spite of peer review……..in fields such as “Climate Science” the quality is probably much worse but absent some form of “Quality Assurance” sampling how can anyone have confidence? Replication and testing versus observations seldom happen. Imagine what could be achieved by committing even 1% of what is spent on research to replication studies!
“Climate Science” may not be the worst example. When “Reading Research” papers were subjected to the (loose) standards of “Behavioral Science” less than 1% were found to be competent.
Ridd makes the point that there are consequences in engineering. When a bridge or a building collapses someone is going to be held liable especially when there are dead bodies. In academic research there are seldom any consequences for being wrong (excepting those volcano experts in Italy).
Ridd makes the point that young climate scientists would be crazy to publish anything that does not conform with the “Consensus”. This is obviously true and it is further evidence that this branch of science is corrupt. How many other branches are in this rotten state?
The professor was lucky to get judge Vasta and fight the issue in Australian courts. It would have taken much longer and it would have cost much more in US courts. Free speech is no longer free. The Mann vs. Steyn case is in its 8th year:
@G C, the field of medical research is also full of such stupidity. If one study establishes that a drug is ‘effective’, it is then unethical to do research which excludes this drug. Statins and heart disease being the stand out example.
EM I have been keeping track of local temperatures here in Mt Barker, my home town in South Australia….Especially how cold it was in June.
The BOM minimum temperature record is very curious.
We are on the fringe of Mt Barker And we had 8 continuous days of frosts in June.
From the 19th to the 26th of June.
But the BOM’s station record shows just 4 days of below zero and they are NOT continuous…
The weather station is 1.5 ks away from my home. But is in the middle of town.
So we could have a factual indication of the impact of the Urban Heat Island Effect.
Here is the BM link : http://www.bom.gov.au/jsp/ncc/cdio/weatherData/av?p_nccObsCode=123&p_display_type=dailyDataFile&p_startYear=&p_c=&p_stn_num=023733
Of course the other hand the BOM may be ‘adjusting’ the weather station records.
In the interests of demonstrating global warming by suppressing cold outbreaks.
Yeah, I’d expect it is UHI.
Wunderground used to have a neat feature where it would present a huge list of nearby volunteer stations. I just tried it (was going to see if they had similar in Australia) again and found that a) it is now way slow with a huge page weight. b) It now says “powered by IBM Cloud” so likely got a rewrite in the porting and maybe slowed down with added “features” and “OO Code”. and c) the local stations area said “no personal stations nearby”. Well, as there had been hundreds near by before, I think that is more “bug” than “correct”.
The page also tends to crash that tab in Chromium. (used for posting on this particular old x86 computer as FireFox now has issues with YouTube video cut / paste of the “embedded” link – I think Google is deliberately making it incompatible with FireFox…)
It had been useful for demonstrating UHI in some areas as you had a map with all the temperatures spread around it.
Well, thanks for the “on the ground” UHI report. Here’s the Mt. Barker link for Wunderground:
https://www.wunderground.com/weather/au/mount-barker/ISOUTHAU284
You might be able to look around and find some other stations to A/B of interest.
E M Thanks for that Wonderland link. It loaded fine here. So I looked around and found that it has data for Bull Creek which is about 15 ks away. And it shows a longish period with very low minimum temperatures from the 19th of June. Bull Creek is a locality not a town; there is not even pub there or store there. Just a local public hall dating from ages ago and some farms. So it is a rural location and there is no UHI there.
I’ll look at the BOM to see if there are any rural weather stations close by to Mt Barker which show up a more accurate record.
Kuitpo is a locality about 15 ks. away from Mt Barker.It’s BOM weather station shows no temperatures at or below freezing in June. And that is very very odd indeed.
http://www.bom.gov.au/jsp/ncc/cdio/weatherData/av?p_nccObsCode=123&p_display_type=dailyDataFile&p_startYear=&p_c=&p_stn_num=023887
Mt Lofty which is the summit of the highest Mountain in the Adelaide Hills ( a hill really ) Shows the same pattern. No temps at or below zero & no frosts supposedly. Ummmm
http://www.bom.gov.au/jsp/ncc/cdio/wData/wdata?p_nccObsCode=123&p_display_type=dailyDataFile&p_stn_num=023842&p_startYear=
Apart from Mt barker those are the only weather stations in the Adelaide hills that are close by.There used to be others but they are no longer active.
All this is an unexpected result for me. Still puzzling over it.
COLD JUNE IN MT BARKER OR WAS IT ?
IT WASN’T URBAN HEAT ISLAND EFFECT !
( A REVISED VIEW BASED ON FURTHER RESEARCH AND HELP FROM FELLOW COMMENTATORS AT JO NOVA )
I have been keeping track of local temperatures here in Mt Barker, my home town in South Australia….Especially given how cold it was in June.
The BOM minimum temperature record for June is very curious.. I live on the fringe of Mt Barker And I had 8 continuous days of frosts in June from the 19th to the 26th of June.And my Min/Max thermometer was showing zero or lower each morning.
But the BOM’s Mt Barker weather station record shows just 4 days of below zero and they are NOT continuous…
Here is the link : http://www.bom.gov.au/jsp/ncc/cdio/weatherData/av?p_nccObsCode=123&p_display_type=dailyDataFile&p_startYear=&p_c=&p_stn_num=023733
At first I thought that the problem was the BOM weather station was in the middle of town and so “Urban Heat Island Effect” was at play here.
But I’ve just discovered today that the weather station is in fact 150 meter as the crow flies away from my home in the front garden of a home in the street over the back.
And that street is also about 100 meters from the edge of town and cow paddocks. So clearly UHI effect is not what’s happening.
So what is happening ?
Of course the other hand the BOM may be ‘adjusting’ the weather station records. In the interests of demonstrating global warming by suppressing cold outbreaks.
But to make that accusation without even checking out the situation on the ground would be unfair to BOM. So I went & ha a quick look at where the station is located.
In the interests of their privacy I will not give the address. Though it can be found via Google and the BOM record of it is here :
Click to access IDCJMD0040.023733.SiteInfo.pdf
There was nobody home to talk with but It is not in the spot indicated in the Google photo. There is now an old caravan there on that site. In fact the weather station has been moved about 15 meters to another corner of the front garden. I took a photo and it is below.
Here are some observations about this official BOM weather recording station :
1 It is sheltered by house ( 3 meters away )
2 It is sheltered by a large Grevillia Robur tree ( 7-9 meters high ) & by shrubs ( 3-4 meter away)
3 It is sheltered from cold by being high on a slope which falls away to the street and onwards the houses on the other side of the street.
4 It is sheltered by a fence and
5 It is sheltered by the neighbours house.
Ummmmm ?
Explanatory notes : Cold air always falls/slides from high to low places because it is denser & heavier than warmer air. Normally it is standard practice to locate a BOM weather station on flat land.
Conclusion : This is ABSOLUTELY not a good location for a BOM weather station.
All these factors affect :
1 The rainfall measured,
2 The minimum daily temperature measured and
3 The Maximum daily temperature measured.
Once upon a time the BOM was very picky about where it located it’s weather recording stations. Years ago I discussed this with a BOM employee in the context of working out whether to have a weather station on my farm. He said it had to be at least 50 meters away from any trees or buildings out in a paddock where it would not be damaged by stock
It seems clear that the BOM has given away those guidelines in recent years.
SOME HOURS LATER :
I am still pondering this BOM Mt Barker weather recording station. For those who don’t know Mt Barker well, the town spreads itself across a number of hills and lower areas. This weather station currently is located on quite an elevated hill. The same hill as where I live. Cold air being denser tends to flow downhill into the creek flats etc. This must have an effect on the minimum temperatures recorded here. So I doubt that the minimum temperatures recorded are an accurate representation of what is actually happening
I observed eight days of morning frosts happening in June all around me. i observed the impact of those frosts on my citrus trees. All are young and have 0.8 meter high shade cloth around them to protect them from frost. Yet above the shade cloth Yet above the shade cloth the leaves were frosted. The same thing happened to my 3 young shade cloth protected avocado trees. The BOM weather record asks me to ignore what I observe on my own land. And that’s nuts.
Finally the BOM claims that their records show that the average minimum temperature at Mt barker has been slowly increasing in recent decades. But the fact ( as I discovered yesterday, is that the weather station was moved from it’s original site in the middle of town to one hilly location some where on “Hill St.” Mt Barker in the early 1990’s, and then to a second quite hilly location just over the back from my place ~ 2004.
Cold air flows down hill away from such sites. Warmer air moves in, in it’s place. So that increase in the average minimum temperature is frankly a FAKE.
And was June cold ? Yes it definitely was ! There were indeed 8 mornings of continuous frosts here at Mt Barker. BOM got it wrong !
I wonder how many of BOM’s stations across Australia also get it so wrong ?
Bill