WAGES data from James Clark Ross
Data from the JCR are sent daily. The hourly messages contain one sample averaged over a 15 minute period.
NOTE The data displayed here have NOT been quality controlled.
The larger of each pair of plots shows data obtained over the last 10 days. Click to enlarge. The smaller of each pair shows data from the whole deployment. Again, click to enlarge. Data which appear absent may just be due to communications problems with the iridium system.
Contact: Margaret Yelland or Robin Pascal
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Ship Position From October to May the JCR carries out work in the Southern Ocean, then returns north to the UK for a yearly refit and one or two summer research cruises in the Arctic. Click on the small image to the left to see the full cruise track since May 2010.
Speeds (m/s) Red - true wind speed corrected to 10 m and neutral stability (the corrections require a number of mean meteorological and navigation parameters, so if any of these are missing the true wind will also appear absent). Blue - wind speed as measured (no corrections). Green - ship speed over the ground. 1 m/s is roughly 2 knots. See these Met Office pages to convert from wind speed into "Force xx" on the Beaufort scale.
Wave heights (m) Estimated significant wave height from the Wavex wave radar system.
Zero-upcrossing-period (s) from the Wavex system.
Temperatures (deg C) Dark blue - air temp from the NOC psychrometer. Red - air temp from the NOC Vaisala (this is )not working at the moment. Green - wet bulb temp from the NOC psychrometer. Light blue - sea surface temp from the ship's thermosalinograph.
Directions Red - ship's heading (degrees to). Green - true wind direction (degrees from). Blue - wind direction relative to the ship (wind on bow = 180)
Relative Humidity (%) Green - calculated from the wet and dry bulb temperatures from the NOC psychrometer. Blue - from the NOC Vaisala. Red - from the ship's Vaisla. Note - when the water reservoir for the psychrometer's wet bulb dries out the calculated humidity becomes roughly 100%.
Air pressure (mb) Data from one of the ship's sensors.
Total Downwelling Short Wave (W/m2)
Heat Fluxes (W/m2) Bulk estimates of the sensible (blue) and latent (green) heat fluxes. Latent heat fluxes calculated via the dissipation method are shown for the two Licor sensors. The Licors are shrouded periodically - this results in a zero flux being measured. Spikes in the zero flux occur when Licor data are absent for some reason and a bulk value is calculated instead. The shrouded Licor is not working properly at the moment so instead of small ID fluxes being calculated, a default bulk estimate is being used.