Profiles of the water column in historical context
We reports CTD variables in temporal context using its historical data record (1999 to present). We use these plots to QC
our data in temporal context and how variables
and vertical density structure relate to one another.
You can graphically explore current profiles and historic conditions of each of our CTD variables
in the following section. Each pdf file contains several pages.
- Page 1 and 2 relate variables to historical measurements of the
- Page 3 and 4 show how variables relate to one another.
Detailed information on our stations can be found here.
How to read our graphics:
A green background describes the range into which 50% of our historical recorded data fall. Grey shows the 99% data envelope that we estimate from the interquartile range multiplied by 1.5. Pieces of the data line falling within the 50% envelope are colored black, data falling outside the 50% envelope are colored red. New extrema are emphasized with a red dot. If we sample a depth deeper than previously sampled we give the data line the color blue. Bars (dark blue) on the right indicate the number of observations (e.g. N=2). To illustrate if the entire water column section (<10m, 10-30m, >30m) is on average a “normal” or “anomalous” condition, we included a color coded vertical line. Red indicates on average anomalous conditions; green indicates on average normal conditions.