ACE-1 R/V DISCOVERER STATUS FORM

DATE/TIME: (95112219)

PREPARED BY: Tim Bates

• LOCATION PRESENT: LATITUDE:49 59.0S LONGITUDE: 137 17.7E
• LOCATION -6 HOURS: LATITUDE: 49 57.8S LONGITUDE: 135 13.8E
• LOCATION -12 HOURS: LATITUDE: 49 49.6S LONGITUDE: 135 26.2E
• LOCATION -18 HOURS: LATITUDE: 49 04.3S LONGITUDE: 137 18.6E

PRESENT WEATHER:

Winds 290 degrees 10 m/s, pressure 995.3 mb and rising, overcast, 8.0C, seawater 6.80C, front just passed ship, rain has stopped.

SEA STATE:

Westerly 2-3 M swell/waves

INSTRUMENTS/SYSTEMS STATUS

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• Sea Surface Measurements:

  1. DMS: Concentrations are approximately 1 nM.
  2. DMSP/DMSO: Samples collected every 8 hours for particulate and dissolved DMSP and DMSO. Incubation experiment in progress
  3. NH4+NH3/pH: NH4+NH3 concentration 0.5 umolar. pH 8.09.
  4. CO:
  5. NMHC:
  6. CO2:
  7. Nitrate/Chlorophyll: Nitrate concentrations are approximately 16 uM. Seawater fluorescence is being recorded continuously. Surface seawater samples are being collected every 4 hours for discrete chlorophyll analysis.

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• Atmospheric Measurements:

  1. DMS: Concentrations are approx. 50 ppt.
  2. SO2: Concentrations are approx. 10ppt.
  3. NH3: Using oxalic acid coated filters.
  4. CO: Concentrations are approx. 60 ppb.
  5. NMHC:
  6. O3: Concentrations are approx. 20 ppb.
  7. Nitrogen oxides and PAN: Only PAN system operational.
  8. Radon:
  9. CO2:
  10. Solar Radiation:
  11. Aerosol physics: Ntotal = 550 pp/cc, "open" size distribution.
  12. 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.
  13. Aerosol optical properties: Instrumentation (nephelometer and PSAP) fully operational. Absorption coefficient low.
  14. TDMA-RH:
  15. TDMA-Thermal:

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• ISS Status and Schedule:

  Full ISS status report for ACE-1 for today is here

  Beginning at 0400 this morning, sondes will be launched every 3 hours to support Lagrangian operations.

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• Routine Weather Observations: Going well.
• Satellite Observations: None
• CTD Cast Schedule: None

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• SPECIAL PLANNED OBSERVATIONS (NEXT 24-HOURS):

  1. The front passed the ship at 1900 today . When the clear air arrives at
  2. the ship, we will begin launching the constant density balloons and
  3. then turn down wind to follow them for approximately 24 hours.

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• PAST 24-HR OPERATIONS SUMMARY:
• OTHER COMMENTS: