Download - Thanks to many, especially …. VERTIGO investigators at sea And … crew and captain of R/V Revelle
Optical Assessment of Particles and Sedimentation
Processes of theTwilight Zone
Jim Bishop (LBNL)S E. Wilson (VIMS)
and T.J. Wood (LBNL) Thanks to many, especially ….VERTIGO investigators at sea
And … crew and captain of R/V Revelle
Funding: DOE/Biological and Environmental Research Program
And NSF (OCE) for ship time access
MULVFS
POC/PIC& Scattering
Sensors on CTD
Imaging FluxRecorder
Target: Biological pump and export of C to depth
PICPIC
Goal: Understand Twilight Zone ProcessesHow: Pioneer autonomous high frequency obs
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TransmissometerPOC (uM)
0 1 2 3 4 0 1 2 3 4Pressure (dBars)
0 1
K2 ALOHA
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D1 D2
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QUANTITATIVE DIGITAL PHOTOGRAPHYOF > 51 m particles from MULVFS
Gives at sea assessment of biological pump
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10 X DIFFERENCE IN >51 MATERIAL
K2
ALOHA
Optical Sediment Trap
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CarbonFlux
Recorder
DepthRecorder
GPS,tracking
ElastomerDampingSystem
Main buoy/Strobe/RF
Nylon Rope
floation
Optical Carbon Flux Recorder - twined instrumentsthird generation prototype
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Camera, 3 lighting modesSeparates POC and PIC Flux
1146 UTC 2246 L
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1422 UTC 0122 L
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1658 UTC 0358 L
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1933 UTC 0633 L
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2208 UTC 0908 L
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0044 UTC 1144 L
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0319 UTC 1419 L
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0555 UTC 1655 L
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QUANTITATIVE ANALYSIS
Image cycle number
Clean
60 cycles / 24 hours
Swimmer in trap
K2 18 00 1206 18night day
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Dark Field OST Aug 5-6 2006
1658 UTC 0358 L
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EGGS
K218 00 1206 18
night day
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Inst 1Inst 1
2 3 4 5
Inst 3Inst 3
“Swimmers”6:30 11:45 16:50 18:301:37
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K218 00 1206 18
night day MOST SWIMMERS
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FEWLARGEAGGS.
Summary: (1) SURFACE POC concentration
differences (ALOHA- K2) not strongly indicative of Export Strength (cf. Lam HBLE talk)
TWILIGHT POC LEVELS DO.SPIKES IN XMISS PROFILES => ZOOPLANKTON
(2) MULVFS SAMPLES PERMIT REAL TIME QUANTITATIVE ASSESSMENT OF
LARGE PARTICLE ABUNDANCE(cf. 10X Contrast between K2 and
ALOHA)
MORE COMING SOON… CHEMISTY - SIZE ANALYSIS
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Summary: (3) OPTICAL TRAP:
NEW!!! 24 minute flux !!!high frequency detail of particle sedimention. Food Web (egg rain event, diurnal
swimmers, etc.)
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And …
Summary: (3) OPTICAL TRAP:
NEW!!! 24 minute flux !!!high frequency detail of particle sedimention. Food Web (egg rain event, diurnal
swimmers, etc.)
June 21 2005
ONE MORE STEP forCarbon FLUX Explorer
Development - HOUR
RESOLUTION OF SEDIMENTATION FOR MONTHS
IN REAL TIME
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Preliminary ICP-MS resultsMULVFS - Aloha vs K2 1-53 um
P
ALOHAK2
Ca
Sr
500
Sr
5000
Ba
Mn