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Communicating through climate indicator<br />

signs<br />

17<br />

Bronya Alexander<br />

and Peter Hayman<br />

Motorists are often<br />

exposed to<br />

in<strong>for</strong>mative road<br />

signs such as bushfire risk or<br />

number of road accidents. So why<br />

not have a sign to convey seasonal<br />

climate in<strong>for</strong>mation Based on an<br />

idea from the Birchip cropping<br />

group in Victoria, along with<br />

funding from the South Australian<br />

Grains Industry Trust Fund and<br />

other organizations, the South<br />

Australia Research and<br />

<strong>Development</strong> <strong>Institute</strong> (SARDI) has developed the Climate<br />

Indicator signs. These large signs are used to convey a<br />

range of different types of seasonal climate in<strong>for</strong>mation<br />

through the use of colored dials. They are placed in<br />

paddocks on the road side so that farmers and<br />

agriculturists can see the latest in<strong>for</strong>mation and outlooks.<br />

The signs have also been shown and discussed at<br />

agricultural field days like the one shown in the photo<br />

above.<br />

There are six dials on the signs as seen in Figure 1<br />

and described below.<br />

1) Current growing season rainfall (GSR) decile –<br />

this is calculated by comparing the amount of current<br />

season rainfall with the long-term rainfall at the closest<br />

meteorology station.<br />

2) Forecast GSR deciles – the Department of<br />

Agriculture and Food Western Australia (DAFWA) has<br />

designed an experimental system <strong>for</strong> producing seasonal<br />

climate <strong>for</strong>ecasts. This system draws from indices based<br />

on the El Niño Southern Oscillation (ENSO), and produces<br />

five years that are considered to have per<strong>for</strong>med similarly<br />

to this year. The GSR from these five analogue years are<br />

indicated via the five arrows on the dial.<br />

3) Probability of exceeding median rainfall using<br />

SOI – this shows two arrows. One represents the current<br />

Melissa Rebbeck from SARDI presents the Climate Indicator Signs at a Yorke Peninsula<br />

field day in South Australia in September 2006.<br />

outlook from the Australian Government Bureau of<br />

Meteorology <strong>for</strong> the chance of exceeding the median<br />

rainfall over the following three months. The other arrow<br />

is the outlook based on the SOI, provided by the<br />

Queensland Department of Primary Industries.<br />

4) Yield Prophet – this indicates the expected crop<br />

yield from the Yield Prophet model developed by the<br />

Birchip Cropping Group. Yield Prophet is the interface to<br />

the crop simulation model called APSIM (Agricultural<br />

Production Systems Simulator), which simulates crop<br />

growth on a daily time step.<br />

5) Nitrogen Calculator – this model, developed by<br />

CSIRO (Australian Commonwealth Scientific and Research<br />

Organisation), estimates the expected crop yield and the<br />

corresponding nitrogen amounts recommended <strong>for</strong> the<br />

soil. The expected yield from Nitrogen Calculator is<br />

indicated on the dial.<br />

6) Soil moisture guide – this shows the Yield<br />

Prophet estimate <strong>for</strong> current stored soil moisture.<br />

The SARDI Climate Applications Unit is updating the<br />

signs in Morchard (upper north), Paskeville (Yorke<br />

____________<br />

The authors are Project Officer and Principal Scientist on Climate<br />

Applications, respectively, both from the South Australia Research<br />

and <strong>Development</strong> <strong>Institute</strong> (SARDI).

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