L4 in-situ data station

These data are collected using sensors attached to our sampling rosette, by the R/V Plymouth Quest, at station L4 which is located 10 nautical miles south-west of Plymouth. The sensors include a SeaBird SBE 19+, a transmissometer, a Chelsea PAR sensor, a fluorometer and an oxygen optode. These data form part of a long time series collected at this station and are included in the ICES Report on Ocean Climate. The entire time-series can be downloaded here.

The vocabularly used on this page can be further clarified by reading the excel spreadsheet found here. Additional date, time and instrument number information is also available

To request these data please use the Custom Data Request Form

Data plots for 29/11/2023


Click here to view the bottle firing depth data.

Click here to view the raw data.

Archived data

Select a date to view archived data. Underlined numbers shows data is avaliable.

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Change month

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Change year


Composite Profiles at L4

Select the years of interest for the Composite plots here:

To request these data please use the Custom Data Request Form

You can explore the data using the plotting icons on the right hand side of the screen. If you would you like to download the data directly use the 'Box Select' icon to select your region of interest and then use the 'Download Composite Data Directly' button to pre-fill in the Custom Data Request Form.