Teachers workshop

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Teachers workshop

• November 2005

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Santa Monica Bay Observatory (SMBO)
Mooring
Latitude 33 55.9 N Longitude 118 42.9
W Deployed June 21, 2001 by MBARI Towed
July 28, 2003 2nd deployment
February 4, 2005 by UCLA
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On the mooring .
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What data are available on the net?
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Meteorological parameters

• air temperature C
• barometric pressure mbar
• wind speed m/s
• wind direction , 0 north, 90 east

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Surface ocean parameters

• Conductivity Temperature Depth
• conductivity S a measure of how easily
  electric current passes through water. Salinity
  is calculated from conductivity
• temperature C
• depth dbar
• density can be calculated from salinity,
  temperature, and depth

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... more surface ocean parameters

• Optical instruments
• fluorometer measures the chlorophyll-a content
  of phytoplankton cells in the water via the
• fluorescence V

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Principle of fluorescence measurements
Reemission of longer wavelength photons by a
molecule that has absorbed photons of shorter
wavelength
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Principle of fluorescence measurements
Fluorometer emits a certain wavelength, causes
chlorophyll to emit red fluorescence (longer
wavelength) Fluorescence intensity is typically
directly proportional (linear) to concentration
Light detector
Wavelengths specific to compound
Emission filter
Excitation filter
Wavelengths created by compound
Cuvette or Sample cell
Lamp
Specific wavelength of light
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... more surface ocean parameters

• Optical instruments
• transmissometer measures suspended and dissolved
  solids in the water
• light attenuation, turbidity, suspended water
  mass transport, visibility

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Microcats

• Temperature and salinity string CTDs are
  attached to mooring cable in 10m steps down to
  100m water depths

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ADCP

• Acoustic Doppler Current Profiler to measure
  the ocean currents down to 100m

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Santa Monica Bay Observatory June November 2001
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How to get to the data

• http//quercus.igpp.ucla.edu/sm
  bo/
• DATA
• Life Access Server

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Our research vessel
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What kind of data do we collect on the boat?
Underway measurements sea surface
temperatures sea surface salinity sea surface
fluorescence Ocean currents down to 80m water
depth Measurements on station Vertical profile
for water temperature and salinity Dissolved
inorganic carbon Nutrients Chlorophyll Phytoplankt
on species Iron
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How to collect water samples
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