1. Sea Water DIC Flag List 006 Massive leakage of sea water into lower Wong Pipette cup. Water in cup was extracted, but some CO2 was lost. 010 Leakage of sample into lower Wong Pipette cup. Delivery of acid to cup was unsuccessful, and water in cup was not fully extracted. 015 Minor leak of room air into extraction line during extraction. Leak was sealed and extraction completed, but extraction contaminated with room air. 016 No stirbar in extraction flask. Sea water was not completely acidified. 017 Severe loss of CO2 due to operator error during extraction. 018 Sample tube leakage. Air was found in sample tube. 021 Operator error on manometer. CO2 measurement was compromised. 023 Manometer malfunction. CO2 measurement was compromised. 024 CO2 sample lost or compromised due to flame off tube failure before measurement. 028 Sample not poisoned. Mercury was not detected in bottle. 030 Definite leak in sample bottle before extraction. 036 Water from flame off tube in sample. This CO2 measurement was compromised, but sample was dried and remeasured. 037 Wong Pipette leakage into vacuum. Pipette connection was sealed and extraction completed, but some CO2 was lost. 038 Leakage of room air into acid flask. 039 Failure of extraction flask during extraction. A large amount of air was pumped through line, contaminating extraction. 041 Bad Wong Pipette fill. Air bubbled through sample before fill was completed. 051 Extraction error. Operator did not follow correct extraction procedure. 056 Measured DIC not in agreement with expected value for sample as based on similar and/or surrounding samples. No cause was observed. 057 DIC measured after sample run for isotopes. CO2 was lost. 058 Extraction error. Stopcock SL1C was left open at start of extraction, and CO2 was lost to vacuum. 059 Slow transfer of CO2 from sample tube to XR38 or ECM manometer. DIC is high, indicating probable water contamination from an insufficiently cold water trap. 061 Incorrect calculation. DIC was measured in 16cc chamber of CMM, but DIC was calculated using volume of 4cc chamber. 062 Water in sample bottle likely contaminated, based on high bottle pair disagreement of DIC and especially of 13C/12C isotopic ratio. 063 Delay in filling of Wong Pipette. Sample bottle was open for an extended period, causing contamination with room air or loss of CO2. 064 Poisoning problem. 10 ml of mercuric chloride solution was added to one liter bottle at time of sampling, causing dilution equivalent to roughly 20 umol/kg in DIC. 065 Poor calibration of XR38 or ECM manometer, as based on comparison of samples run in common with CMM. 066 Extraction error. Extraction line was inadvertently opened to atmosphere during extraction. 067 Improper storage of sea water sample bottle (i.e. exposure to excessive heat, sunlight, etc.). 068 Extraction error. Operator turned Wong Pipette stopcock wrong way, allowing sea water to fill pipette cup. Acidified was attempted, but was not successful. 069 Sample extraction after extended storage (>10 years). 2. Sea Water Alkalinity Flag List 501 Air bubble in acid delivery tubing, either observed by operator or clearly indicated by residual pattern of titration curve fit. 502 Leak in titration cell. 503 Electrode/amplifier system malfunction. 507 Poor residual pattern on titration curve fit: cause not determined. 509 Measured alkalinity not in agreement with expected value as based on surrounding or similar samples. No operator error or system malfunction was observed. 510 Sample inlet valve open during titration. Leakage of unacidified sea water into cell continued during entire titration. 511 Bladder leakage during titration. 512 Problematic fill of titration cell. 513 Broken sample bottle (after DIC extraction). Some sample was lost to evaporation. 514 Warm up or test sample. Sample was run after a period of system inactivity or for diagnostic purposes. 517 Sample contamination. For example, particulate matter was observed in sample bottle, or there was extended storage time after DIC extraction. 519 Titration trials with multiple methods or cell configurations (calomel/reference electrode method vs. combination electrode method, capillary tube vs. plunger, different titration programs or acid addition patterns, cell soak vs. no soak). More recent method was chosen. 520 Excessive electrode drift during titration. 521 Excessive KCl buildup on reference electrode. 522 Dosimat malfunction during titration. 523 Plunger malfunction, causing over-pressuring of cell during titration. 524 Incomplete titration: titration program error. 525 Bladder not inflated prior to filling titration cell. Cell was over-pressured during titration. 526 Titration trials with multiple methods or cell configurations (see flag 519). In this instance, older method was chosen over more recent method to maintain continuity of method with other alkalinity titrations from same cruise/leg/station. 527 System malfunction. An unusual event was observed, such as a long delay between doses, skipped doses, or early cessation of titration. 528 Fit problem. Data base fit disagrees with original fit. 3. Sea Water Isotope Flag List 700 Sample contamination, before, during or after extraction. Measured 13C/12C relative isotopic ratio was abnormally negative along with high DIC, indicating contamination with atmospheric CO2. 701 Measured isotopes not in agreement with similar or surrounding samples. No operator error or instrumental problem was observed. 702 Probable machine error. Standard data and sample data were suspect (e.g. sample pair disagreements for entire day of isotope measurements were much larger than normal). 4. Sea Water General Flag List 300 Misidentified sea water sample. Laboratory data indicated that the water does not come from the location specified on the sample data sheets (i.e. labels mixed up and/or Niskin misidentified). 301 Storage of sea water failed. Laboratory data indicated a severe loss of sample due to evaporation of water from sample bottle prior to analysis and caused by failure of the bottle's greased seal. 302 Contaminated or unpoisoned sea water sample. All laboratory data showed high bottle pair disagreement and/or are not in agreement with expected values. 303 Failure of Niskin water sampler at sea. All data (ship and shore) indicate that the Niskin either leaked or tripped at a depth other than that indicated by CTD. Circumstance was confirmed by communication with shipboard personnel shipboard personnel or from shipboard data records.