Table 3.
Quantile regression results for annual rainfall changes over time (years) for each weather station, Simpson Desert, central Australia
| Weather Station Quantile | Estimate | CI | t-value | P |
|---|---|---|---|---|
| Bedourie | ||||
| 0.05 | −0.54 | −0.13–1.89 | −0.77 | 0.44 |
| 0.1 | 0.17 | −0.83–1.84 | 0.28 | 0.78 |
| 0.5 | 0.41 | −0.17–1.26 | 0.65 | 0.52 |
| 0.9 | 3.78 | 0.68–5.05 | 1.83 | 0.07 |
| 0.95 | 4.15 | 2.10–5.10 | 2.03 | 0.04* |
| Glenormiston | ||||
| 0.05 | 0.15 | −0.17–0.97 | 0.41 | 0.68 |
| 0.1 | 0.40 | −0.18–1.10 | 1.32 | 0.19 |
| 0.5 | 0.76 | −0.12–1.64 | 1.71 | 0.09 |
| 0.9 | 1.95 | 0.36–3.10 | 1.79 | 0.07 |
| 0.95 | 2.44 | 1.06–3.68 | 2.05 | 0.04* |
| Marion Downs | ||||
| 0.05 | 0.42 | −0.15–0.73 | 1.11 | 0.27 |
| 0.1 | 0.50 | −0.003–1.17 | 1.18 | 0.24 |
| 0.5 | 1.15 | 0.62–1.93 | 2.37 | 0.02* |
| 0.9 | 1.55 | −0.08–3.72 | 1.11 | 0.27 |
| 0.95 | 2.10 | 0.10–3.30 | 1.41 | 0.16 |
| Boulia | ||||
| 0.05 | 0.19 | −0.90–0.35 | 0.53 | 0.59 |
| 0.1 | −0.16 | −0.61–0.52 | −0.53 | 0.59 |
| 0.5 | 0.79 | −0.69–1.04 | 1.52 | 0.13 |
| 0.9 | −1.77 | −2.37–1.51 | −1.25 | 0.21 |
| 0.95 | 0.07 | −2.45–3.26 | 0.04 | 0.97 |
| Birdsville | ||||
| 0.05 | 0.43 | −0.15–0.59 | 1.97 | 0.05* |
| 0.1 | 0.31 | 0.15–0.64 | 1.74 | 0.09 |
| 0.5 | 0.89 | 0.31–1.39 | 2.48 | 0.01* |
| 0.9 | −0.09 | −2.24–1.71 | −0.07 | 0.94 |
| 0.95 | −0.63 | −3.34–1.48 | −0.42 | 0.67 |
| Sandringham | ||||
| 0.05 | −0.79 | −2.67–2.24 | −0.42 | 0.67 |
| 0.1 | −1.39 | −2.41–2.09 | −0.92 | 0.36 |
| 0.5 | −1.95 | −3.81–1.70 | −1.18 | 0.24 |
| 0.9 | 1.24 | −6.90–3.39 | 0.38 | 0.70 |
| 0.95 | 0.56 | −7.36–26.32 | 0.16 | 0.87 |
| Arltunga | ||||
| 0.05 | −0.14 | −5.17–1.00 | −0.31 | 0.75 |
| 0.1 | −0.24 | −1.32–0.80 | −0.57 | 0.57 |
| 0.5 | 0.10 | −0.72–1.32 | 0.15 | 0.88 |
| 0.9 | 1.67 | 0.47–4.55 | 0.95 | 0.34 |
| 0.95 | 1.70 | 0.55–5.54 | 0.80 | 0.42 |
| Undoolya | ||||
| 0.05 | −0.11 | −0.41–2.43 | −0.24 | 0.81 |
| 0.1 | 0.18 | −0.33–1.63 | 0.37 | 0.71 |
| 0.5 | 0.84 | −0.89–0.98 | 1.38 | 0.17 |
| 0.9 | 2.32 | 0.83–3.75 | 1.77 | 0.08 |
| 0.95 | 3.70 | 1.69–4.17 | 2.45 | 0.02* |
| Alice Springs | ||||
| 0.05 | −0.48 | −0.86 to −0.32 | −2.41 | 0.02* |
| 0.1 | −0.48 | −6.66 to −0.01 | −1.96 | 0.05* |
| 0.5 | −0.11 | −0.31–0.69 | −0.36 | 0.72 |
| 0.9 | 0.86 | −0.70–2.66 | 0.72 | 0.47 |
| 0.95 | 2.20 | 0.50–2.51 | 1.84 | 0.07 |
| Oodnadatta | ||||
| 0.05 | 0.32 | −0.05–0.74 | 1.27 | 0.21 |
| 0.1 | 0.33 | −0.09–0.56 | 1.50 | 0.14 |
| 0.5 | 0.50 | 0.18–1.00 | 1.91 | 0.06 |
| 0.9 | 1.81 | 1.16–2.20 | 3.83 | <<0.001* |
| 0.95 | 1.96 | 0.97–3.70 | 2.10 | 0.04* |
| Mt Dare | ||||
| 0.05 | 0.58 | −0.98–1.71 | 0.83 | 0.41 |
| 0.1 | 0.51 | −0.36–1.66 | 0.74 | 0.46 |
| 0.5 | 0.75 | −0.77–1.56 | 0.94 | 0.35 |
| 0.9 | −2.33 | −8.39–3.68 | −0.71 | 0.48 |
| 0.95 | −2.27 | −8.80–10.63 | −0.51 | 0.61 |
The estimates in bold indicate that the slope does not overlap the confidence interval (CI) for the median slope (0.5 quantile). Significant P-value indicated by *.