Haaga et al. (2017): Spatially variable orbital forcing of sea level during the past 800,000 years
Summer energy is defined as the integrated insolation over a portion of the year where the insolation exceeds a certain threshold. Experiment with the slider to see how the integrated insolation changes with the threshold.
We reconstruct the integrated summer energy in the Late Pleistocene by calculating the area under the daily insolation curves at the specified threshold. The summer energy decreases with increasing thresholds at a given latitude.
Spatial variability of integrated summer energy during the past 800,000 years. Click on any latitude to display the corresponding time series below.
With a fixed y-axis range, the summer energy variability is hard to spot. Clicking the checkbox normalises the data to zero mean and unit variance, making the orbital variability clearer.