enzh-CNfrdeeliwitjakorues

2014 DIC SamplingCalCOFI collects samples for inorganic carbon and total alkalinity at specific stations throughout the cruise track. Seawater samples are collected from several depths, preserved and brought back to SIO for total inorganic carbon and total alkalinity analysis. These measurements allow the calculation of pH and pCO2. The objectives of these measurements are: first, the long-term characterization of the inorganic carbon system and its response to changing ocean climate, and second, measurements of pH in the coastal zone in order to monitor the anthropogenic impact on coastal ecosystems in the Southern California Bight.

DIC samples for Dave Keeling were also collected on CalCOFI stations 90.70, 90.90, & 90.120 from Sep 1986 (CalCOFI 8609NH) to Nov 2002 (CalCOFI 0211NH). In Aug 2008, DIC sampling restarted on 7 stations, grew to 10 stations in Jan 2011, and currently DIC has expanded substantially (see figure & table). Dissolved inorganic carbon (DIC) and total alkalinity (TA) data have only been integrated into the CalCOFI hydrographic dataset since Aug 2008, then Jan 2009 through presently.  Similarly, pH data have only been integrated into the CalCOFI hydrographic dataset since April 2014.
Link to most recent csv extracted from the CalCOFI Hydrographic MS Access Database.
 

Proposed (since 2014) Station DIC Sampling Depth Table
  Depth m                   Total
Line.Sta 0 15 30 41 50 100 170 250 320 500 Samples
093.3 030.0 X   X   X X X X X X 8
090.0 090.0 XX   X   X X X X X XX 10
090.0 060.0 XX   X   X X X X X XX 10
090.0 053.0 XX   X   X X X X X XX 10
090.0 030.0 X   X   X X X X X X 8
086.7 035.0 X   X   X X X X X X 8
081.8 046.9 (SBB) X   X   X X X X X X 8
080.0 055.0 (CCE 2) X X X   X X X X X X 9
080.0 080.0 (CCE 1) X   X X X X X X X X 9
080.0 051.0 X   X   X X         4
080.0 060.0 X   X   X X X X X X 8
080.0 070.0 X   X   X X X X X X 8
080.0 090.0 X   X   X X X X X X 8
080.0 100.0 XX   X   X X X X X XX 10
083.3 040.6 XX   X               3
083.3 042.0 X   X               2
086.7 033.0 X   X               2
090.0 028.0 X   X               2
090.0 037.0 XX   X               2
090.0 045.0 X   X               2
090.0 080.0                     2
090.0 120.0 X   X               2
093.3 028.0 X   X               2
Deep Station                   XX @ 3500 2
                       

 

DIC CSV Column Header Index
CSV Column Header Description
Cast_Index CalCOFI Hydrographic Database Cast Table Index; 1 = CalCOFI database's 1st cast record
Bottle_Index CalCOFI Hydrographic Database Bottle Table Index; 1 = CalCOFI database's 1st bottle record
Cruise CalCOFI Cruise Designation with century prefix; CalCOFI 0901 = 200901
Depth(m) Sample Depth in meters
Line.Sta_ID CalCOFI Line & Station ID; Sta 80.55 = 080.0 055.0
Depth_ID Unique database index built from:Century-CruiseShip-Casttype-Julian DOY-UTC Time-LineSta-DepthDup-Record Indicator
DIC 1 DIC Analysis - Dissolved Inorganic Carbon Measurement, first sample
DIC 2 DIC Analysis - Dissolved Inorganic Carbon Measurement from a duplicate sample drawn from same depth as DIC 1
TA 1 DIC Analysis – Total Alkalinity Measurement, first sample; same DIC bottle as DIC 1
TA 2 DIC Analysis – Total Alkalinity Measurement from a duplicate sample drawn from same depth as TA 1
pH 1 Spectrophotometrically measured pH per kilogram seawater
pH 2 Spectrophotometrically measured pH per kilogram seawater from a duplicate sample drawn from same depth as pH 1
Salinity 1 DIC Analysis – Salinity value from DIC 1 bottle
Salinity 2 DIC Analysis – Salinity value from DIC 2 bottle
Temperature_degC CTD Temperature from Bottle Sample Depth
Bottle Salinity CalCOFI Salinity Measurement from DIC Depth
Bottle O2(ml_L) CalCOFI Oxygen Measurement in milliliters/liter, from DIC Depth
Bottle O2(µmol/Kg) CalCOFI Oxygen Measurement in umoles/Kg, from DIC Depth
Sigma-theta Sigma-theta Density calculated from CalCOFI data
DIC Bottle_ID1 DIC 1 Bottle Index Number
DIC Bottle_ID2 DIC 2 Bottle Index Number
DIC Quality Comment Quality Control Comments on DIC samples after processing

 

Go to top
Our website is protected by DMC Firewall!