Near-surface wind (vectors), temperature (red=warm, blue=cold), sea-ice (white shading) and precipitation (black shading) from version 2C of the 20th Century reanalysis.
Grey fog masks the regions where the analysis is very uncertain (because there are too few nearby observations). Yellow dots mark the observations available - at each time all observations from a 24 hour period centred on that time are shown.
We have the observations from the British Antarctic Expedition (Meteorologist - George Simpson), from both their base at Cape Evans on the edge of the Ross sea, and their ship the Terra Nova (which travels each summer from New Zealand to Cape Evans).
We have the observations from the Norwegian base at Framheim (probably mostly taken by Henrik Lindstrøm).
We have observations from the Australian Antarctic Expedition (Meteorologist, Cecil Madigan): all three bases; Macquarie Island, Cape Denison, and the Shackleton Ice shelf; as well as ship observations from the Aurora.
We have a handful of observations from the second German Antarctic expedition - ship obs. from the Deutchland.
We're still missing ship observations from the Fram, all the sledging records, and everything from the Japanese expedition.
Created at NERSC (nersc.gov).