Estimating Climate Trends: Application to United States Plant Hardiness Zones

<table>Annual minimum temperature anomaly (relative to the 1976–2005 mean) averaged across the coterminous USA, along with a fitted trend curve. Dashed curves show a 1-<svg height="8.3000002" id="M55" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 9.7250004 8.3000002" width="9.7250004" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> uncertainty envelope for the trend.</table>

Advances in Meteorology

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Figure 4

Figure 4: Estimating Climate Trends: Application to United States Plant Hardiness Zones 