General Cruise Information;			
Underway SOMMA:  Operations, Data Reduction and Quality Control;			
Surface Bottle Data			

General Cruise Information:			
Ship				Ronald H. Brown
Year				1998
Cruise name			RB-98-02 (OACES)
Leg				3
Date depart			6/28/98
Date arrive			7/7/98
Port depart			Azores
Port arrive			Miami
Chief scientist			Shari Yvon-Lewis
pCO2 operator			Craig Neill
pCO2 (responsible person)	Robert Castle
TCO2 (responsible person)	Esa Peltola
Chl (responsible person)	Jason Masters
O2 (responsible person)		George Berberian


Underway SOMMA (AOML-1) Operations, Data Reduction and Quality Control:		
			
Operations:			
1. Jun 28:	Departure from Azores.		
		The system hang up at 12:51. It was restarted at 15:48.		
		At 23:30 acid did not drip properly to the stripper.		
2. Jun 30:	At 00:30 salt bridge in the liquid level sensor.		
3. Jul 1:	At 23:05 the system was noisy and magnesium perchlorate trap was changed.		
4. Jul 2:	At 2:30 Ship wide power failure.		
		High blank: 1/4"-1/8" plastic fitting connected to stripper was changed.		
5. Jul 3:	At 19:30 the system was noisy and magnesium perchlorate trap was changed.		
6. Jul 4:	At 04:00 the system was noisy and magnesium perchlorate trap was changed.		
7. Jul 6:	The system hang up at 14:52. It was restarted at 15:34.		
		The system was shut down at 15:50.		
8. Jul 7:	Arrival to Miami.		

Data Reduction and Quality Control:			
1. Salinity correction was applied for all the samples.			
2. CRM correction:			
    Dickson CRM batch #42 and Millero CRM batch#2 were used to correct the data.			
    The certified values for the batches are:			
    Dickson CRM batch #42: 	1985.1			
    Millero CRM Batch #2: 	2027.3			
    The results obtained from each cell were corrected individually.			
    The difference of the measured and certified value of CRM:		1.498	CRM
    6/29-6/30:	1985.1	-0.439	MCRM
    6/30-7/1:	2027.3	1.183	CRM
    7/1-7/2:	1985.1	3.458	CRM
    7/2-7/3:	1985.1	2.569	MCRM
    7/3-7/4:	2027.3	3.172	CRM
    7/4-7/5:	1985.1	4.439	CRM
    7/5-7/6:	1985.1	3.117	MCRM
    7/6-7/7:	2027.3		
3. LAT and LONG were added.			
4. Quality control:			
    The following plots were created and used to evaluate the data:			
    TCO2 vs. Julian Time			
    TCO2 vs. LAT			
    TCO2 vs. LONG			
    Chlorophyll  vs. Julian Time			
    Chlorophyll  vs. LAT			
    Chlorophyll  vs. LONG			
    Chlorophyll vs. TCO2			
    Temperature vs. TCO2
    Salinity vs. TCO2
    fCO2 (water) vs. TCO2
    fCO2 (air) vs. TCO2


Surface Bottle Data:

1. Some of the CRM values were hand calculated, because the SOMMA program had malfunctioned.
2. Salinity correction was applied for the samples.
3.HgCl2 correction was applied (cDIC*1.00037)
4.CRM correction was applied: An average of the two CRMs
   was calculated ((1999.96+1999.41)/2=1999.69 and the
   difference of that value and the certified value was
   used to correct the data (1999.69-1994.64=5.05).
5. LAT, LONG, temperature, chlorophyll, fCO2w (insitu) and fCO2a were merged to this dataset.