Showing posts with label RCS. Show all posts
Showing posts with label RCS. Show all posts

Wednesday, April 7, 2010

Richmond - More Confusion

The Queensland District 3 (Northern Goldfields and UpperFlinders) lists only four "everyday" weather observation stations. All four are airports, and the oldest has measurements only back as far as 1992. The stations are as follows:

030022 - Hughenden  -  [data] [graph]
030124 - Georgetown  -  [data] [graph]
030161 - Richmond  -  [data] [graph]
034084 - Charters Towers  -  [data] [graph]

And again, there is a disconnect between the "everyday" weather stations and the RCS "high quality" stations, which includes:

030045 - Richmond Post Office - [data] [graph]

Because all four of these stations have less than 20 years worth of data, none of them would satisfy the BoM's objective of "high quality and long climate records", and accordingly Richmond Post Office has been selected as the RCS station for this district.

A couple of observations can be made about this Richmond PO station. Firstly, as was highlighted in the "More Dodgy Post Offices" item, the siting of this station does not appear to meet CRN1 standards, with paved roads on all boundaries.

Secondly, in spite of this, where is the warming that the CSIRO+BoM have noted in their Climate brochure?













At best, this graph illustrates continuity or perhaps a slight cooling over the 100 year period.

Summary

From a quality assurance point of view, it is suprising that a station can qualify as a "high quality" RCS station, but not be part of the everyday weather observation station network. Yet this is exactly what we find for both Queensland District 2 ("Burketown PO") and now also for this "Richmond PO" in adjoining District 3.

Furthermore, the CSIRO+BoM Climate brochure makes the assertion that "All of Australia has experienced warming over the past 50 years". Clearly on the basis of the only station record for this District 3 which stretches back over 50 years, this is not the case.

Wednesday, March 31, 2010

Burketown - But Which One Is It?

Burketown (029004 - [data] [graph]) is the representative station for Queensland District 2 (Gulf Country) in the Australian RCS Network. In the RCS, this station goes by the name "Burketown Post Office", but it is difficult to find in the underlying BoM data.

A look at the map shows that there are (apparently) eight stations in the Gulf Country District:

029012 - Croydon Township - [data] [graph]
029038 - Kowanyama Airport - [data] [graph]
029039 - Mornington Island - [data] [graph]
029063 - Normanton Airport - [data] [graph]
029077 - Burketown Airport - [data] [graph]
029139 - Sweers Island - [data] [graph]
029167 - OZ Century Mine - [data] [graph]

Plus the eighth station that goes by the name "Burketown".

But - where is this "Burketown" station? It doesn't show up on the list of stations on the Queensland Weather Observations page. And if we click on the "Burketown" legend on the map, it takes us here:











A non-station, apparently. But given that the data starts in 1890 for 029004 - Burketown PO, the assumption is that "Burketown PO" and "Burketown" are one and the same station. But would you bet the house on it?

After looking at the data for the rest of the stations in this District, the answer is "probably not". Here is a brief summary of the discrepancies between Station start date and Data start date for the remaining seven stations (oldest to newest):

029012 - Croydon Township. Station date: 1889; Data date: 1912 (23 years missing)
029139 - Sweers Island. Station date: 1893; Data date: 2001 (108 years missing)
029038 - Kowanyama Airport. Station date: 1912; Data date: 1965 (53 years missing)
029039 - Mornington Island. Station date: 1914; Data date: 1972 (58 years missing)
029063 - Normanton Airport. Station date: 2001; Data date: 2001
029077 - Burketown Airport. Station date: 2001; Data date: 2001
029167 - OZ Century Mine. Station date: 2003; Data date: 2003

Clearly, apart from the first station (029012 - Croydon Township), the remaining stations are useless for assessing long-term climate trends. They give a whole new meaning to "the dog ate my homework".

Consequently, the choice for the RCS representative station comes down to two candidates, geographically separated by 290km:

A) 029012 - Croydon Township. A station with a 98-year history, albeit one with data missing from the middle years, which shows a pronounced cooling trend over the period:













B) 029004 - "Burketown Post Office". A poorly-sited station of questionable origin (which doesn't appear in the day-to-day list of weather stations), but does profess to have a slightly longer data history (again with missing data in the middle). And does indicate a period of warming between 1950-1990.














Answer: Let's go with the "Dodgy Post Office" - the one that can have a warming "signal" teased out of it.

Summary:
The data from the stations in the No. 2 Queensland District are a shambles, to say the least. Across all the stations, there are no continuously unbroken data history prior to 1990, which means that any contribution to "climate records" from this District is - at best - guesswork. There also appears to be very little quality control of the basic station records - "Burketown" and "Burketown PO" seem to be used interchangeably. And finally, when in doubt about which station to include in the RCS, the default position appears to be to select the one that indicates a warming trend - however tenuous.

Tuesday, March 30, 2010

More Dodgy Post Offices

A couple of posts ago, we looked at a collection of six very dodgy stations - mostly located in or around post offices or sites near the centre of towns.

In today's post, we look a further selection of five equally dodgy stations - they are:
  1. 010592 - Lake Grace PO (WA) - [data] [graph]
  2. 017031 - Marree (SA) - [data] [graph]
  3. 029004 - Burketown PO (QLD) - [data] [graph]
  4. 030045 - Richmond PO (QLD) - [data] [graph]
  5. 046037 - Tibooburra PO (NSW) - [data] [graph]
010592 - Lake Grace Post Office

This station is listed in the BoM RCS Listing as "Lake Grace Post Office", but in the detailed station record as "Lake Grace Comparison". At any rate, the BoM "official" photograph for this site speaks for itself:
















Here we can see that the station is located next to a well maintained railway line, and partially in the shade of a large tree.

017031 - Marree

Again, this station is listed in the RCS Listing as "Marree", but in the detailed station record as "Marree Comparison". Like the station above, the "official" photograph speaks for itself.














Hard to know from the photograph if this is an active station, or just parked here with the rest of the junk.

029004 - Burketown PO

I can only conclude that they sent the 'Airport Photographer' to capture this image. It shows the station sitting in what looks like a wide open space, complete with shady trees:














Until we look at the location with Googe Earth, that is:


















And then we see that it is at the intersection of two streets, and across the road from a large paved area. If only the photographer had stood at the other end!

030045 - Richmond PO

Again, the "official" image shows a wide open, rural space - even with a bit of shade.














Google Earth - a completely different aspect:


















Not quite the perspective you get from the first image.

046037 - Tibooburra PO

The pick of the bunch - but then I guess it would be hard to dress up this shot.


Again, you have to remind yourself that this is a "high-quality" station, collecting reliable data about the "State of the Climate".

Summary:
The two "Dodgy Post Offices" posts detail eleven stations (out of a total of 103 RCS stations) that have, shall we say, less than optimal placement. On rudimentary examination of the "official" BoM photographs and Google Earth, none of them appears to meet CRN1 specifications. And yet the BoM and CSIRO feel comfortable in making the assertion that "all of Australia has experienced warming over the past 50 years". Extraordinary.

Sunday, March 28, 2010

Weipa? Why Weipa?

It is hard to understand how Weipa Airport (027045, [data], [graph]) qualifies as a RCS station with "high quality and long climate records".

Presumably the fact that it is located at an airport gives it preferential treatment:
  • 51 of the 103 stations (49.5%) in the RCS Network are located at airports or airstrips
  • 11 of the 18 RCS stations (61.1%)  in Queensland are located at airports or airstrips
  • 60 of the 134 stations (44.8%) currently active in Queensland are located at airports or airstrips
However - for the Peninsula District of Queensland (which includes Weipa Airport), 7 of the 8 active stations are located at airports or airstrips, so the chances of selecting an airport for the RCS station are high.

The other seven stations in Peninsula District are:

027054 - Coconut Island - [data] [graph]
027058 - Horn Island - [data] [graph]
027073 - Coen Airport - [data] [graph]
027075 - Scherger RAAF - [data] [graph]
028004 - Palmerville - [data] [graph]
028007 - Musgrave - [data] [graph]
028008 - Lockhart River Airport - [data] [graph]



On the surface of it, Weipa Airport seems to meet none of the qualifications for a "high quality, long term" station.

1. It is sited next to an airstrip
















2. It is missing most of its data


 
 
 
 
 
 
 
 
3. But for the few years that it has been collecting data, it does have a slight warming trend.












Of the remaining airport stations, five (027054 - Coconut Island, 027058 - Horn Island, 027073 - Coen Airport, 027075 - Scherger RAAF, 028004 - Palmerville) have less years of data than Weipa Airport, and are therefore less suitable candidates.

The sixth (028007 - Musgrave) has most of its data missing, and is therefore even less suitable.


 
 
 
 
 
 
 
 
 
 
 
 
028008 - Lockhart River Airport has far more years of data than Weipa Airport, but unfortunately it would seem to support a different narrative - namely 40 years of temperature stability:
 
By far the best candidate is the remaining non-airport station, 028004 - Palmerville. Its qualifications are:

1. Situated in a rural location, with no apparent contamination from human habitation or machinery:

















2. A long term, almost complete set of data:












3. Unfortunately, like Lockhart River Airport, it also tells the wrong narrative - over a century of temperature stability:













Summary:
Weipa Airport could not be more untypical of the stations that the RCS claims to represent, namely "high quality, long term" records. The only two stations in this District which, on the surface of it, appear to more fully satisfy these requirments have been passed over - presumably because they support a different narrative. Unless there is another explanation, this would appear to be blatant cherry-picking of the worst kind. But then - why hasn't this been picked up by the "peer review"?

Saturday, March 27, 2010

More Holes than a Swiss Cheese

It seems that looking at the effective data start date is not the only yardstick by which to evaluate the BoM "high quality" RCS stations. It is also necessary to graph the data to look for the additional holes in the data.

In the previous post, we noticed that several stations had data missing for 40 or more years beyond their notional commencement date. One of the stations looked at was 008039-Dalwallinu, which has a notional start date of 1912, but a data start date of 1955 - or 43 years of missing data. Upon closer examination it appears that the continuous data start date is actually 1957. A closer look again shows that there is missing data for 1970 as well, which clearly shows on the graph of the data:













There are several stations that have incomplete data in the early years, including:
As bad as they are, the sample above are by no means the worst of the bunch. Several of the stations have large gaps in the middle of the data as well, including:

014508 - Gove Airport - [data] [graph]













017043 - Oodnadatta Airport - [data] [graph]













063005 - Bathurst Agricultural Station - [data] [graph]













200790 - Christmas Island Airport - [data] [graph]













... and even 300000 - Davis Station - [data] [graph]













Summary
As noted in the previous post, there are 32 RCS stations that have data missing from the beginning of the dataset. From this analysis, we see that there are 22 RCS stations that have data missing beyond the initial start date. Eight of these RCS stations are in the same list as the previous post, which means that there is a total of 46 RCS stations (or a staggering 44.6%) that have significant missing data.

In the HARRY_READ_ME.txt file from the CRU ("Climategate") files, the author of the READ_ME makes the following telling comments:

"getting seriously fed up with the state of the Australian data. so many new stations have been introduced, so many false references.. so many changes that aren't documented."
"Now looking at the dates.. something bad has happened, hasn't it. COBAR AIRPORT AWS cannot start in 1962, it didn't open until 1993!"
"I am very sorry to report that the rest of the databases seem to be in nearly as poor a state as Australia was."
It is very hard to disagree with these comments. In this and the last two posts it has become apparent that:
  • Cunderdin station has been summarily dropped out of the RCS network and substituted by Cunderdin Airport (with no documentation to indicate the change).
  • Many stations exhibit the same problems as "Harry" observed with Cobar Airport
  • Over 44% of the stations have sigificant amounts of data missing - in a number of cases, enough to make the data that is left unusable.
One does not have to be a rocket scientist to appreciate the frustration that "Harry" must have gone through in attempting to make sense of the RCS data. How bad is the RCS data? It's all hidden in plain view for anyone who takes the time to look.

Thursday, March 25, 2010

Where has all the data gone ?

As noted yesterday, the BoM temperature data for the "new" Cunderdin station (010286 - Cunderdin Airfield) begins at 1996, while the station record indicates that the station commenced in 1942.












Apparently, there are 52 years worth of data missing from the record for this "new" Cunderdin station.

Which begs the question - is this a unique occurence, resulting from the late-night changes at the BoM to substitute station 010286 for the inconvenient Cunderdin station 010035?

A look at the listing of RCS stations on the BoM site shows that there are 103 "high quality" stations in this network. They have notional station start dates ranging from 1860 through to 2003, with 65% of them having a notional start date prior to 1969. Overall, the average notional station start date is 1950.

However, when you look at the data start date, a different picture emerges. For openers, 32 of the stations (32%) have a data start date which is later than the station start date by more than a year, or have significant gaps in the data in the early years.

Some of these missing years of data are considerable - several are in the order of the 52 year gap noted for Cunderdin, above. For example:

008039 - Dalwallinu Comparison. [data] [graph]
Station date = 1912, Data date = 1955 (43 years missing)













010592 - Lake Grace PO. [data] [graph]
Station date = 1914, Data date = 1956 (42 years missing)



 
 
 
 
 
 
 
 
 
 
017031 - Marree Comparison. [data] [graph]
Station date = 1885, Data date = 1939 (54 years missing)


 
 
 
 
 
 
 
 
 
 
 
 
And several more in addition to these.
 
The net effect of all this missing data is that for these 103 stations, the oldest station data start date moves forward by 4 years (to 1864), while the average station data start date moves forward by 9 years (to 1959).
 
Where's the Beef?
 
Just how "high quality" are the stations in the RCS network? What is the overall impact on the derived climate record of all these missing years? With so much data from the early years missing, how can anyone make a valid long-term climate assessment? Is this RCS data of any practical value at all?

Wednesday, March 24, 2010

Where did Cunderdin Go?

An all-time favourite quote of mine comes from "Alice in Wonderland":
'When I use a word,' Humpty Dumpty said in rather a scornful tone, 'it means just what I choose it to mean -- neither more nor less.'
And so it is with the BoM and - I would guess - with most institutions engaged in promoting the greater man-made global warming narrative.


Last week, I downloaded the list of RCS stations from the BoM website. Included in this list was the following station:
10035 - CUNDERDIN
 
This station, and its accompanying photograph, was included in the "Dodgy Post Offices" blog entry early this week, which in turn was given air time on the Andrew Bolt blog. This apparently has instigated a response from the BoM (via the Andrew Bolt blog), as follows:
At Cunderdin, parallel observations between the two sites took place between 1996 and 2007. Temperature observations ceased at the old site in 2007 and 10286 is now the only temperature measuring site in the area. The photo displayed on Andrew Bolt’s blog, in any case, is not the pre-2007 site - it is a rainfall-only site which continued under the 10035 site number at a different location after temperature observations ceased.
So, in simple terms, while the BoM documentation states that temperature data is (and has been) gathered from one station, it has in fact been gathered from a second station before being moved to a third station.
 
And who knew this - apart from the BoM, that is?
 
Today, the list of RCS stations on the BoM site no longer includes 10035, and in its place we have this entry:
10286 - CUNDERDIN AIRFIELD
 
So, it would seem that history can simply be rewritten at the stroke of a mouse - the visible public record can be altered in the middle of the night, with nothing to indicate that changes have taken place. Nothing on the station site record indicates the anecdotal history described above. An older site has simply been replaced by a newer site.
 
Which raises the question: how has the temperature data for this 10286 site been sourced or reconstructed? The 10035 Cunderdin station lists a start date of 1914. The 10286 Cunderdin Airfield station lists a start date of 1942, but the BoM website only appears to have data from 1996 onwards - which is in line with the BoM comments noted above. Where are the missing years? And more importantly, how can this 13 years of data support the CSIRO+BoM assertion that "since 1960 the mean temperature in Australia has increased by about 0.7 °C"?
 
Perhaps a more appropriate quote for the pursuit of Climate Science comes from George Orwell's "1984":
'Who controls the past controls the future: who controls the present controls the past'.
For the record, here is a view of the "new official" Cunderdin Airfield station:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
And it would probably surprise no-one to learn that this new Cunderdin Airport station exhibits a warming trend:
 
 
 
 
 
 
 
 
 
 
 
 
 

Which in turn looks almost nothing like the one that it replaced (10035):













I think I am beginning to understand where their "about 0.7 °C mean temperature increase" comes from.

Tuesday, March 23, 2010

Townsville Airport - A Case in Point

A comment we see thrown around quite a lot these days is: "Does it really matter if a weather station is located at an airport? Surely all this gets lost in the background noise." Well, let's look at Townsville Airport, and see what we can learn.
  1. 032040 - Townsville Airport (FNQ) - [data] [graph]
Townsville Airport (1940)

Firstly, the obligatory BoM "rural scene" photograph of the Townsville Airport weather station:














Followed by the Google Earth view of the same:



















As can be seen from this image, Townsville is anything but a "non-urban" location. It is a coastal city in Far North Queensland, and has a population (2008) of ~176,000, having grown from ~98,000 in 1981.

In addition, Townsville Airport is anything but the "rual" airstrip shown in the BoM image above. According to the history of Townsville Airport, the following significant activites can be noted:
  • 1958 - the present 2438 metre long main runway was completed 
  • 1981 - the new international terminal was opened and B747 flights commenced
  • 1986 - the present runway was resurfaced
  • 2003 - the second stage of the airport terminal redevelopment was completed
I wonder if any of this is reflected in this graph from the BoM, particularly the pronounced uptick from the mid-1980s?













By comparison, when we look at the same graph for sleepy seaside Cardwell, 135km north of Townsville, what do we see?













Can you believe it? Pronounced cooling over the same period. Apparently we can have Global Warming in Townsville, while we simultaneously have Global Cooling a mere 135km away. Amazing.

Eloi's First Law of Climate Science: "No Airport - No Global Warming".

Friday, March 19, 2010

The Air Bases

Within the RCS Network, there are six air bases that are used to collect data. These are:
  1. 014932 - Tindal RAAF (NT)
  2. 040004 - Amberley RAAF (Qld)
  3. 061078 - Williamtown RAAF (NSW)
  4. 067105 - Richmond RAAF (NSW)
  5. 068072 - Nowra RAN (NSW)
  6. 087031 - Laverton RAAF (Vic)
The fact that military air bases are used as part of the RCS Network is important because, according to the BoM's website, preference has been given to stations with "a location in an area away from large urban centres".

In addition, the American NOAA/NCDC defines 5 classes of station quality ratings, as follows:
  • Class 1 (CRN1)- Flat and horizontal ground surrounded by a clear surface with a slope below 1/3 (<19deg). Grass/low vegetation ground cover <10 centimeters high. Sensors located at least 100 meters from artificial heating or reflecting surfaces, such as buildings, concrete surfaces, and parking lots. Far from large bodies of water, except if it is representative of the area, and then located at least 100 meters away. No shading when the sun elevation >3 degrees.
  • Class 2 (CRN2) - Same as Class 1 with the following differences. Surrounding Vegetation <25 centimeters. No artificial heating sources within 30m. No shading for a sun elevation >5deg.
  • Class 3 (CRN3) (error >=1C) - Same as Class 2, except no artificial heating sources within 10 meters.
  • Class 4 (CRN4) (error >= 2C) - Artificial heating sources <10 meters.

  • Class 5 (CRN5) (error >= 5C) - Temperature sensor located next to/above an artificial heating source, such a building, roof top, parking lot, or concrete surface.
Let's see how this first batch of stations measures up to the BoM's criteria and the CRN classification.

Tindal RAAF Base (1969)

The following two pictures provide different aspects of the station at the Tindal RAAF base. The first image is from the BoM website, and shows a typical rural setting for the weather station.


 


The second image is from Google Earth, which provides a birds-eye view of the general location. (The cross and numbers represents the co-ordinates of the station taken from the BoM site).


This image provides a vastly different aspect. As can be seen, the weather station is located adjacent to the runway and taxi-lane. Nothing in the BoM image indicates any of this environment. In fact, it provides a very misleading view of the situation of the station, IMHO.

Amberley RAAF Base (1941)

Again, we will compare and contrast the image provided by the BoM with the birds-eye view from Google Earth for this station. Again, the BoM image indicates that everything is fairly rural:




Meanwhile - check out the Google Earth view of the same location.


We see again that the station is adjacent to the runway and taxi-way of the airstrip. If we look at the top right of this image, we can also see the town of Ipswich (population ~155,000) encroaching on the air base.

Williamtown RAAF Base (1942)

Same drill for Williamtown RAAF base on the outskirts of Newcastle, NSW. BoM image:


Google Earth image:


Again, nothing in the BoM image that even hints at the close proximity of an airbase or runway.

Richmond RAAF Base (1993)

Same again for the Richmond RAAF base on the outskirts of Sydney. BoM image:


Followed by the Google Earth view:


Notice a pattern developing here?

Nowra RAN Base (2000)

BoM "rural view":


Google Earth "reality view".


Laverton RAAF Base (1941)

And for completeness, the Laverton RAAF base on the outskirts of Melbourne. First, the BoM "rural view":



Follwed by the Google Earth view:


As well as the nearby runway that we don't see in the BoM image, notice that a fair chunk of Melbourne also encroaches on the south-east.

Conckusion

This is quite a deceptive behaviour on the part of the BoM. A casual observer would be led to believe that the siting of these weather stations is fully compliant with both the internal BoM objectives, and the highest NOAA/NCDC classification (i.e. CRN1).

A more detailed examination indicates that nothing could be further from the truth. And of course Australia's "climate data" is sourced from these stations, amongst others.

The taxpayers that fund this should be outraged!