The Weather of HMS Beagle

As I’ve mentioned previously, last Thursday I was warm up man for Charles Darwin and Robert Fitzroy (finally, a job truly worthy of oldWeather) – I was giving a talk about the project at the Progress Theatre in Reading.

HMS Beagle isn’t (yet) one of our ships, the observations from her 1831-6 circumnavigation had been rescued before oldWeather started; but I could use what I’ve learned from analysing the oldWeather observations to show the route of the ship, the weather they experienced, and the effect of their observations on our reanalyses for the period.

The route of HMS Beagle, and the value of her weather observations. The inset graph show the Beagle's pressure observations (as black dots), and the analysed mean-sea-level-pressure (from scout run 3.3.8 of the Twentieth Century Reanalysis): The pale blue band gives the range of first-guess pressure estimates (at the location of the ship), and the dark blue band the analysis rage. The dark band is consistently narrower than the light one, showing the more precise estimates of the weather obtained by assimilating the observations.

One response to “The Weather of HMS Beagle”

  1. Yvan Dutil says :

    It would be interesting to make a visualization with the usual fog of ignorance and glow of discovery for that time period. This is so deep in time their is only a very limited dataset available.

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