Heat, Nitrate, and Other Fluxes in BIOSOPE Marlon R. Lewis Dalhousie University & Satlantic Inc.
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Heat, Nitrate, and Other Fluxes in BIOSOPE Marlon R. Lewis Dalhousie University & Satlantic Inc. Halifax, Canada
description
Heat, Nitrate, and Other Fluxes in BIOSOPE Marlon R. Lewis Dalhousie University & Satlantic Inc. Halifax, Canada. Objectives: Estimation of Heat, Nitrate, Carbon (others) fluxes in SPG. Heat. Nitrate. Carbon. Net surface Heat flux. N 2 ?. Air-sea flux. Horizontal fluxes. - PowerPoint PPT Presentation
Transcript of Heat, Nitrate, and Other Fluxes in BIOSOPE Marlon R. Lewis Dalhousie University & Satlantic Inc.
Heat, Nitrate, and Other Fluxes in BIOSOPE
Marlon R. LewisDalhousie University &
Satlantic Inc.
Halifax, Canada
,)( Nwezez PNy
Nv
x
NuD
t
ND
),()( COwezez PCCy
Cv
x
CuD
t
CD
),()( pwopezezp QQQy
Tv
x
TuCD
t
TDC
Heat CarbonNitrate
Biological
uptake
Vertical flux
“Sinking”
Biological
uptake
Vertical flux
Euphoticzone
Air-sea flux
Absorptionof solar
radiation
Net surfaceHeat flux
PenetrativeIrradiance
Horizontal fluxes
Vertical flux
N2?
Interesting comparison of Marquises, gyre (N, S), upwelling
Objectives: Estimation of Heat, Nitrate, Carbon (others) fluxes in SPG.
Free-fall hyperspectral downwelling irradiance, upwelling radiance.Includes fluorometer, 2 backscatter, CTD, surface hyperspectral Ed.Also need meteorology, ADCP (?).Net flux at base by difference.+ Floats, altimetry, scatterometry
Heat Fluxes – Surface & Subsurface
@0.2 m/s, ~ 30 min. for profileIf time available, can do surface Lu, Eu (z ~10-20 cm)
),()( pwopezezp QQQy
Tv
x
TuCD
t
TDC
Absorptionof solar
radiation
Net surfaceHeat flux
PenetrativeIrradiance
Horizontal fluxes
Vertical flux
?? ??
??
Surface Mode
Profile Mode
Nitrate Fluxes (I do not need any water!)
200 .00 240 .00 280 .00 320 .00Wavelength (nm )
0 .000
0 .020
0 .040
0 .060
Sp
ecif
ic M
olar
Ab
sorp
tion
(R
elat
ive
Sca
le)
1 .00
2 .00
3 .00
Who
le w
ater
ab
sorb
ance
Whole water
Bromide ------
Nitrate
Probe Anti-Biofouling Cover
Computer System
UV Light SourceUV Spectrograph
User Interfaces
Retro-Probe Optics
ISUS Nitrate sensor on CTDResolve N(z) at < 0.5 mCompute dN/dT, and estimate nitrate fluxes from vertical heat fluxes.
0-1.2 M 0-40 M
Calibration
May try new 4 cm pathlength cell for BIOSOPE to (maybe) improve limits of detection.
Open Ocean – Equatorial Pacific
ISUS001 nitrates from 4400km transect in EqPac on R/V Mirai MR02K06 – Feb 200318 profiles to 300m, 10,000 real time nitrate measurements
Atlantic, Gambian Plain, March/April, 2003 O2
NO3-
Similar approach can be taken with C, P, Si, Fe, others. Need e.g. TCO2(z), Fe (z), pCO2, etc.
Issues/Questions:•Data policy/access (for me, open to all)?•Responsible persons for meteorology, ADCP, CTD?•Underway profiling?•Interested people for C, Fe, others?•Container shipping/lash down?•PROVOR/APEX Floats w/radiometer (?)•Berth for Tech/Eng.?
