Slocum CTD Temperature Alignment Selected Segments RU 22
- Slides: 28
Slocum CTD Temperature Alignment • Selected Segments: • RU 22 (unpumped SBE-41 CP) – ru 22_2009_264_1_54_mbd (9 downcasts, 9 upcasts) – ru 22_2009_264_1_60_mbd (10 downcasts, 10 upcasts) – ru 22_2009_264_1_66_mbd (10 downcasts, 10 upcasts) • RU 23 (pumped SBE-41 CP) – ru 23_2009_264_1_60_mbd (10 downcasts, 10 upcasts) – ru 23_2009_264_1_64_mbd (11 downcasts, 11 upcasts) – ru 23_2009_264_1_68_mbd (11 downcasts, 11 upcasts)
CTD Correction: Temperature Alignment Methodology: Select segments with “ 2 -layer” water column, separated by strong thermocline and exhibiting negligible internal wave activity. Interpolate individual profiles from ~0. 5 Hz to 10 Hz, shift T relative to pressure/time, interpolate to 0. 25 m depth bins and calculate the average upcast and average downcast. Optimal shift is that which produces the smallest area between the average upcast and average downcast.
RU 22_2009_264_1_54_mbd – CTD
RU 22_2009_264_1_54_mbd - Flight
RU 22_2009_264_1_54_mbd – Cross-section
RU 22_2009_264_1_54_mbd – Temperature Alignment
RU 22_2009_264_1_60_mbd – CTD
RU 22_2009_264_1_60_mbd - Flight
RU 22_2009_264_1_60_mbd – Cross-section
RU 22_2009_264_1_60_mbd – Temperature Alignment
RU 22_2009_264_1_66_mbd – CTD
RU 22_2009_264_1_66_mbd - Flight
RU 22_2009_264_1_66_mbd – Cross-section
RU 22_2009_264_1_66_mbd – Temperature Alignment
RU 23_2009_264_1_60_mbd - CTD
RU 23_2009_265_1_60_mbd – Flight
RU 23_2009_265_1_60_mbd – Cross-section
RU 23_2009_265_1_60_mbd – Temperature Alignment
RU 23_2009_264_1_64_mbd – CTD
RU 23_2009_264_1_64_mbd – Flight
RU 23_2009_264_1_64_mbd – Cross-section
RU 23_2009_264_1_64_mbd – Temperature Alignment
RU 23_2009_264_1_68_mbd – CTD
RU 23_2009_264_1_68_mbd - Flight
RU 23_2009_264_1_68_mbd – Cross-section
RU 23_2009_264_1_68_mbd – Temperature Alignment
Results
Conclusions • No consistent results for either pumped or un-pumped CTD • Significant variability in vertical velocity within and between upcasts and downcasts. • Temperature related to velocity?
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