primary production project start date: january 1, 2005
DESCRIPTION
PRIMARY PRODUCTION Project Start Date: January 1, 2005 - provide ocean productivity data products based on chlorophyll- and carbon-based algorithms (3 standard products, multiple optional algorithms) Kick-off letter to OPPWG: January 7,2005 - PowerPoint PPT PresentationTRANSCRIPT
PRIMARY PRODUCTION
• Project Start Date: January 1, 2005- provide ocean productivity data products based on chlorophyll- and carbon-based algorithms (3 standard products, multiple optional algorithms)
• Kick-off letter to OPPWG: January 7,2005 • Project Presented at MODIS Ocean Color Meeting, February 2005
- recommendation to have a single standard product
• Programmer/start: Robert O’Malley, April 2005
Description of standard products
Thumbnails comparing standard product with alternative algorithms
Download standardproducts
The Ocean ProductivityHome Page
-Overview-Navigation
#1
Standard Products• DIM w/ polynomial rate• DIM w/ exponential rate• Carbon-based production
Interactive Products
Course Work
Visualization Products
Intro to Ocean Color
EducationalProducts
#7Highlights
Pub’s
Images#6
Decision/PolicyInformation
Statistics
Trends
Implications
#5
Outstanding problems
Physiology
Basics
Photosynthesis
Links torelatedsites #4 WRMs
WIMs
TIMs
DIMs
Model Evolution
HistoryDiscussion of the Productivity Problem
#3
Space/Time convergence
Round Robin Results
Fulldescription
Model Code
CustomProducts
-Alternative models-Statistical compare-Short description
OrderAlternativeproducts
#2 SupportingField Data-14C-Fluorescence
Biospheric NPPProducts
-MODIS-CASA
LinkMODISland
LinkCASAsite
LinkRutgers
site
Description of standard products
Thumbnails comparing standard product with alternative algorithms
Download standardproducts
The Ocean ProductivityHome Page
-Overview-Navigation
#1
Backup Slides
Ocean Model Classifications
NPP = (,t,z) PAR (,t,z) a*(,z) Chl (z) d dt dz
NPP = (t,z) PAR (t,z) Chl (z) dt dz
NPP = Pb (z) PAR (z) Chl (z) dz
NPP = Pbopt PAR0 Chl0 Zeu d.l.
Zeu
z = 0
700
= 400
sunset
t = sunrise Zeu
z = 0
sunset
t = sunrise Zeu
z = 0
I. Wavelength-resolved models
IV. Depth-integrated models
III. Time-integrated models
II. Wavelength-integrated models
Polynomial Exponential
Form of Rate Term
GCM’s
Net Primary Production = Gross Carbon Fixation – Phytoplankton Respiration
Net Primary Production = mg C m-3 d-1
= number of cells average carbon fixed per cell = biomass biomass specific rate
NPP = Chlorophyll Pb NPP = Carbon
Areal NPP (m-2) = biomass biomass specific rate f (Iz) f (biomassz) f (Kd)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
0 5 10 15 20 25
f (I z)
Io / Ik
0
2
4
6
8
10
-5 0 5 10 15 20 25 30
Temperature
Pb opt (
max
)
Light limitation dominates
Light-Nutrientinteractions
Light versus Nutrientas dominant control
Boreal Winter
Chl
orop
hyll-
base
dC
arbo
n-ba
sed
Boreal SummerD
iffer
ence
Difference (m
g m-2)
-800
400
0
-400
800
Net P
rimary P
roduction (mg m
-2)
0
1200
800
400
1500
NPP = f [Carbon, Zeu, , g (I0)]