Anomaly vs baseline
Temperature anomalies relative to a zero baseline, with positive and negative areas colored separately.
<Plot height={350} y={{ grid: true }}>
<DifferenceY
data={gistemp}
x="Date"
y="Anomaly"
curve="step"
positiveFill="var(--svp-red)"
negativeFill="var(--svp-blue)" />
<RuleY data={[0]} />
</Plot>