The Wacky World of Weather Stations: No. 15- Roseworthy (SA)

Today I’m looking at sites that are apparently compliant but whose surroundings change over time.

Please refer back to my first post for site specifications.

Station:  Roseworthy  23122

Opened: 1997

Daily Temperature data from: 1997

Data used to adjust Acorn sites at:  Adelaide

Location: Co-ordinates   -34.5106  138.6763

Roseworthy map

About 60km north of Adelaide.

2016 BOM Site Plan:

Roseworthy plan

2019 satellite image:

Roseworthy 23122

The station is on clear ground surrounded by broad-acre farming paddocks.  At different times of the year the area the station represents can range from bare dirt to crops up to 1 metre high, and the type of crop can vary from year to year as well.  This may affect temperatures recorded.

This station may be spatially compliant but its surroundings change with time.  This is an Automatic Weather Station reporting continuously every minute for Latest Weather Observations.

This also happens at many other rural locations, e.g. Horsham.

PROBLEMATIC

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3 Responses to “The Wacky World of Weather Stations: No. 15- Roseworthy (SA)”

  1. Bill in Oz Says:

    Ken, my background is 30 years as an organic farmer in Victoria & SA.

    This is a most probably a broad acre grains paddock just after harvest or maybe a hay paddock just after hay bailing.

    It’s obvious from the sheer number of tractor tracks all over the paddock..that there has been a lot of farmer gear used there.

    Tractors throw off a lot of heat from the engine and from the A/C units which cool the cabin. The machinery towed by the tractors also generates heat and a lot of dust.
    NB : If this as a grain crop then probably a truck was also on the paddock for the grain harvest when the tractors grain bin was full. Here in SA this would usually happen in November to early December.

    NB : If this was a hay paddock being bailed, then there would have been possibly 5 passes by tractors & gear from start to finish. With another effort then to bring the bails of hay in for storage.

    So I suspect that the BOM equipment is also registering additional heat from the tractors & farm gear and automatically sending it to Adelaide BOM head office.

    Definitely a FAIL in my opinion.

    • kenskingdom Says:

      Definitely a grain crop shown here, and could be fodder or other crops at various times. So good points, especially as the tractors etc go a couple of metres from the screen. We used to do a lot of raking/ baling at night- if so, would affect mins.

  2. Bill in Oz Says:

    In this part of Australia the grape harvest is usually taken off ( machine harvested at night so the vintage gets to the winery at a low temperature & thus there is less chance of grapes spoiling.
    This may be relevant to Noriotpa BOM weather station.

    on the other hand here in SA grain is usually harvested during the day when dry to avoid harvesting the grain when there is dew round.

    Of course if the is a rainfall event forecast when the harvest is coming on, all farmers will go gangbusters to get the harvest in before the rain arrives. But this is pretty rare.

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