Saturday, September 6, 2014

Correcting Errors at the BOM: ACTON UPDATE

In its climate statement "Special Climate Statement 48 – one of southeast Australia’s most significant heatwaves" BOM make the following claim: (p.5):"Canberra also set a record with four consecutive days of 39°C."

BOM describe their special climate statements in the following way:
The Bureau's Special Climate Statements provide a detailed summary of significant weather and climate events. They are produced on an occasional basis for weather/climate events which are unusual in the context of the climatology of the affected region. Their purpose is to document major events. In doing so, they serve as a historical record, inform the public on the broader historical and climatological context for events, and give easy access to data and information which is in high demand from the media and the public.

THEY SERVE AS A HISTORICAL RECORD

We requested BOM make a correction to the climate statement about Canberra's recent "record" which is now shown to be false as the BOM's Canberra ACTON station shows the following run of highs in January 1939:
Jan 1939 records indicate 7 consecutive days over 39°C between the 8th and 14th.
Jan 8: 39.3
Jan 9: 39.2
Jan 10: 41.1
Jan 11: 42.8
Jan 12: 39.8
Jan 13: 41.9
Jan 14: 40.8

BOM responded thus:
Fri, Sep 5, 2014 at 1:42 PM
The record referenced in Special Climate Statement 48 is a station record for Canberra Airport (station numbers 70014 and 70351), as is stated in Table 3.

Regards,
Climate Analysis Section

Our response:
The main text does NOT indicate this and in its current form it is misleading. Please correct the main text.
BOM provide the following description of its Special Climate Statements...
Special Climate Statements
The Bureau's Special Climate Statements provide a detailed summary of significant weather and climate events. They are produced on an occasional basis for weather/climate events which are unusual in the context of the climatology of the affected region. Their purpose is to document major events. In doing so, they serve as a historical record, inform the public on the broader historical and climatological context for events, and give easy access to data and information which is in high demand from the media and the public.


As BOM consider the statements "serve as a historical record" it is of utmost importance that errors are corrected. BOM's statement on page 5...that "Canberra also set a record with four consecutive days of 39°C." is clearly in error and requires correction.

It is common practice in scientific reports for a corrigendum to be issued to correct mistakes made in published papers. Given the historical importance BOM place on its special climate statements it seems the issue of a corrigendum is appropriate in this case.

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