ACE-1 R/V DISCOVERER STATUS FORM        
        
DATE/TIME (95112019):                                                    
PREPARED BY:  Tim Bates        
LOCATION PRESENT:   LATITUDE: 47 15.9S LONGITUDE: 147 33.8E 
LOCATION -6 HOURS:  LATITUDE: 46 47.5S LONGITUDE: 149 40.0E  
LOCATION -12 HOURS: LATITUDE: 46 18.2S LONGITUDE: 151 48.8E 
LOCATION -18 HOURS: LATITUDE: 46 04.9S LONGITUDE: 153 43.4E 
        
PRESENT WEATHER:        
Winds 100 degrees 4 m/s, pressure 1024.3mb, overcast, 8C, seawater 6.2C.  
SEA STATE:        Westsouthwest 1-2 M swell/waves 
INSTRUMENTS/SYSTEMS                     STATUS        
1Sea Surface Measurements:        

DMS: Instrumentation fully operational.  Concentrations are around 1 nM.  
  
DMSP/DMSO: Ran samples (DMSP dissolved) from incubation. Extremely  
low turnover time evident. After 30 hours incubation 40nM DMSP dropped to 
only 35nM. This contrasts to an earlier incubation (11/2) which saw 30nM 
drop to 5nM in only 20 hours.  Routine sampling shows DMSP dissolved 
values ranging from 4 to 12nM between Macquarie and Tasmania, with 
minimum values at Macquarie. 
 
NH4+NH3/pH:  Both seawater pH and NH4+NH3 are fully operational.  
NH4+NH3 concentration 0.5 umolar.  pH 8.09. 
 
NMHC:C2-C5: Instrumentation fully operational. 
System for C2-C3 NMHC sampling, but needs calibration.   
 
CO2: Instrumentation fully operational.  
 
Nitrate/Chlorophyll:  Nitrate concentrations are approximately 2 uM. 
Seawater fluorescence is being recorded continuously.   Surface seawater 
samples are being collected every 4 hours for discrete chlorophyll analysis. 
 
2Atmospheric Measurements:        

DMS: Instrumentation operational again after cleaninginlet lines of salt.   
  
SO2: Instrumentation not operational.    
  
NH3: Working on HPLC system. Sampling with oxalic acid coated 
filters. 
  
CO: Atmospheric CO measurements fully operational, concentrations are 
near 60 ppb. 
  
NMHC:Instrumentation fully operational. Had a blocked filter, but blockage 
has since been removed. 
 
O3: Atmospheric O3 is operational.  Yesterdays low readings were caused by 
the sample line blowing off the mast and laying on the deck of the ship.  The 
line was reattached to the mast and measured ozone concentrations returned 
to ~20ppb 
  
Nitrogen oxides and PAN: PAN only operational. 
  
Radon: Instrumentation fully operational.  
  
CO2: Instrumentation fully operational.  
  
Solar Radiation:  spectroradiometer is operational 
 
Aerosol physics:  Sizing instrumentation fully operational. Clean, Ntotal=250 
pp/cc.  
  
Aerosol chemistry:  2-stage and 7-stage impactors currently sampling for time 
periods ranging from 24 to 72 hours for IC, total organic carbon, speciated 
organics, and gravimetric analysis.  
  
Aerosol optical properties: Instrumentation (nephelometer and PSAP) fully 
operational.  Absorption coefficient low.  
  
TDMA-RH: Fully operational, running at the following dry sizes:  35nm, 
50nm, and 150nm. Humidities 50% and 90%. 
  
TDMA-Thermal:  System up. selecting normally 35, 50 and 150 nm to be 
heated at 25, 110, 130, & 150deg. C  
 
3ISS Status and Schedule:        
  
Profiler: had a scs string parsing problem for the last 24 hrs (03:00 - 03:00), 
but is now repaired and taking data 
Rass: operational, taking data 
Surface Met System: operational, taking data 
Sounding System: operational, with flights every 6 hrs (05:00, 11:00, 17:00, 
& 23:00 hrs GMT) 
4Routine Weather Observations:        Going well.        
#5Satellite Observations:         None  
#6CTD Cast Schedule:          
#SPECIAL PLANNED OBSERVATIONS (NEXT 24-HOURS):         
Transit to approximate Lagrangian starting point of 50S 135E.  Underway 
sampling will continue enroute.  
#PAST 24-HR OPERATIONS SUMMARY:        
Twenty hours out of Hobart the ship received notice to alter course and 
continue the project.  At 0300 on 11/20 we turned to a west southwesterly 
course.  Our ETA for the Lagrangian starting point is 0400 on 22 Nov. 
#OTHER COMMENTS:        
All weather maps, cloud picture, and met summary were received last night.  


E-MAIL FROM DR SIMON BROWN:
  
 - Upto 10:00 UTC 01 Dec 1995 ATSR-2 data will be  
 restricted to +- 90km from the sub-satellite path. 
  
 - From 12:00 UTC 01 Dec 1995 to 10:00 UTC 10 Dec 1995 ATSR-2 will 
 have the full  
 500km swath of the plots I sent you. 
  
 - From 12:00 UTC 10 Dec 1995 to the end of the campaign the swath will be  
 restricted to to +- 90km from the sub-satellite path. 
  
 ------------------------------------------------------------------- 
 Dr. Simon Brown 
 Climate Physics Group 
 Mullard Space Science Laboratory 
 University College London 
 Holmbury St Mary 
 Surrey RH5 6NT 
 UK 
 Tel. 01483 204127 
 Fax. 01483 278312 
 internet sjb@mssl.ucl.ac.uk 
  
  
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