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chl_s


CHL_S

Beam Fluorometer summary data

Mounted 4.1 m below mean sea-level on beam at MVCO Air-Sea Interaction Tower

Most of the data parameters include values for the mean and median value as well as the standard deviation of the variable. The table below shows the field name suffix used to differentiate amoung the different values:

Sensors on density array were Wetlabs FLSB or FLNTU (with backscatter for turbidity) ... see after table below:
FLNTU
FLSB

Here is the list of field names:

Field name Description Units
Year The year the data were collected n/a
Yday Decimal year day UTC, January 1 at 00:00 is 1.0
MO The month the data was collected UTC
DA The day the data were collected UTC
HH The hour the data were collected UTC
MM The minute the data were collected UTC
SS The second the data were collected UTC
lrec_chl Total number of records collected during averaging period n/a
fl_ref Mean fluorescence reference channel raw counts
fl_mean Mean fluorescense raw counts
fl_median Median fluorescense raw counts
fl_std Stdev in burst fluorescense raw counts
fl_len no. recs passing filter n/a
Chlorophyll mean value from fl_mean mg/m^3
NTU_Ref mean NTU (Turbidity) reference channel raw counts
NTU_mean Mean NTU raw counts
NTU_median Median NTU raw counts
NTU_std Stdev in NTU raw counts
NTU_len no. recs passing filter n/a
bb_beta Mean backscattering from NTU_mean Beta/m/steradian angle
Thermistor mean raw counts


Deployed 8/20/2003 - 2/2/2004;
FLSB-024 (calibrated 1/21/03) NOTE: calibration off = 63; use 80 as per lab cal
Chl: Sf = 0.0078, off = 80
maxcounts = 16358


Deployed 5/6/2004 - 6/3/2004;
FLNB-024 (calibrated 3/8/04)
Chl: Sf = 0.0081, off = 80
maxcounts = 16362


Deployed 7/7/2004 - 9/3/2004
FLSB-042 (calibrated 6/30/2004)
Sf = .0078 and off = 92


Deployed 9/14/2004 - 5/4/2005
FLSB-042 (calibrated 6/30/2004)
Sf = .0078 and off = 92


Deployed 5/4/2005 - 9/9/2005
Deployed 9/13/2005 - 9/13/2005
Deployed 9/28/2005 - 2/2/2006
FLSB-256 (calibrated 1/17/2005)
Sf = 0.0078 and off = 76
maxcounts 16332


Deployed 5/8/2006 - 9/18/2006
Deployed 9/27/2006 - 1/24/07
Deployed 2/1/2007 - 4/23/07 (lost in storm event)
FLSB-256 (calibrated 3/10/2006)
Sf = 0.0078 and off = 74
maxcounts 16331


Deployed 5/3/2007 - 9/20/2007
FLNTUSB-694 (calibrated 3/29/07)
Chl: Sf = 0.0061, off = 59 & beta: Sf_b = 1.766e-5, off_b = 48
maxcounts 4120


Deployed 12/13/2007 - 12/6/2008
FLNTUSB-693 (calibrated 3/29/07)
Chl: Sf = 0.0059, off = 49 & beta: Sf_b = 1.759e-5, off_b = 48
maxcounts 4121


fluorometer for beam deployment planned for 12/6/08
FLNTUSB-957
calibrated on 3/26/08
chl channel:
dark counts = 57
scale factor = 0.0120
NTU channel:
dark counts: 50
scale factor: 0.0060
NO beta calibration done on 3/26/08


Deployed 3/13/2009 - 7/14/2009
FLSB-693 (calibrated 3/29/07)
Chl: Sf = 0.0059, off = 49 & beta: Sf_b = 1.759e-5, off_b = 48
maxcounts 4121


Deployed 7/14/2009 - 5/11/2010
FLSB-417 (calibrated 6/1/07)
Chl: Sf = 0.0079, off = 87
maxcounts 16330


Deployed 5/11/2010 - 11/16/2010
FLNTUSB-694 (calibrated 7/14/09)
Chl: Sf = 0.0061, off = 55 & beta(for 700nm): Sf_b = 1.999e-5, off_b = 46
maxcounts 4120
NTU: Sf = 0.0061 and off=51


Deployed 11/16/2010 - present
FLNTUSB-960 (calibrated ?/??/10)
Chl: Sf = 0.00??, off = ?? & beta(for 700nm): Sf_b = 1.9??e-5, off_b = ??
maxcounts 41??
NTU: Sf = 0.00?? and off=??


Updated: 11/22/10 jjf NOTE: data are still being generated - instruments have been swapped out but valid scaling has not been applied since 11/16/2010