Data preview

Glider deployment off Mohawk in November 2011. The glider collected only 2 days worth of science data due to communication problems. Its path overlapped well 4 times within the first 2 days, and those were filtered out as transects A, B, C and D as shown below. Arrows on the map indicate the path direction of the glider in each sector. Blue line indicates the Santa Barbara cost line. The table shows the start/end time of each transect (Santa Barbara time), as well as the distance traveled.

Overview of science data along the 4 transects. Temperature plots are overlapped with glider path in the water column. Outliers were excluded. Original salinity data showed disparity between upcast/downcast observations, and that was corrected using a recursive filter. Surface waters still don't seem totally corrected. Chlorophyll fluorescence are in raw counts (no attempt to convert to concentration units was made). The raw oxygen data also presents large differences between upcast/downcast observations. Here, oxygen is expressed in terms of AOU, and only downcast data was plotted as it seems the most consistent. Currently working on correcting the oxygen data: adjusting the lag (25s for the phase data and 10s for the temperature data), replacing the internal optode temperature data with CTD data, more reliable (differences of up to 3 degrees Celsius are observed when compared the two), and adjusting the measurements for salinity levels (as the optode is calibrated for fresh waters). Total scattering comes from the fluorometer sensor (chlorophyll + cdom + total scattering puck), and is measured at 700 nm. Backscattering at 660nm from the backsterring puck showed very similar patterns (not posted here). Backscattering sensors for 470nm and 532nm, and CDOM flouorometer are currently not working properly. Interpolation method used in all graphs: krigging, 1m-bin vertically.