applications investigate the « particulate biomass » distribution along a size continuum and its...
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APPLICATIONS
• Investigate the « particulate biomass » distribution along a size continuum and its variability in relation with W/E gradient or with different trophic regimes.
• Significance of the diurnal variations for all the particles.
• Optics applications : to document relationships between the slope of the size distribution and the particle attenuation spectra.
cp () = -
0.0000001
0.00001
0.001
0.1
10
1000
1 10 100 1000
HiacPVM
ESD (µm)D
ensi
ty
1
10
100
1000
10000
100000
1000000
1 10 100
c
ESD (µm)
Den
sit
y
HiacCoulter
PROSOPE
1.0E+04
1.0E+05
1.0E+06
1.0E+07
0 20 40 60 80 100
ESD (µm)
De
nsi
ty V
olu
me
(µ
m2 L
-1)
Morroco Upwelling
Station #2
PROSOPE (MIO, 15m)
Mean particle diameter
3.5
4.0
4.5
5.0
5.5
20-sept 21-sept 22-sept 23-sept 24-sept 25-sept
Time (days)
ES
D (
µm
)
5.0E+5
7.0E+5
9.0E+5
1.1E+6
1.3E+6
1.5E+6
Par
ticle
con
cent
ratio
n (n
.l
-1)
Particle concentration
Irradiance
Spearman Correlation
-20.5 -19.5 -18.5 -17.539
40
41
42
43
44
long
itude
( °N
)
latitude (°W)
13.814.014.214.414.614.815.015.215.415.615.816.0
m².s-²
Pomme 1
-0.900-0.750-0.600-0.450-0.300-0.1500.0000.1500.3000.4500.6000.7500.900
-20 -19 -18 -17
39.5
40.5
41.5
42.5
43.5
long
itude
( °N
)
latitude (°W)
-5.3-5.15-5-4.85-4.7-4.55-4.4-4.25-4.1-3.95-3.8-3.65
Slope
Slope
-20.5 -19.5 -18.5 -17.539
40
41
42
43
44lo
ngitu
de
( °N
)
latitude (°W)
Geopotentialanomalies
Measurements
Continuous size distribution from 1 to 1000 µm by using complementary devices:
– Coulter Counter (<1 – 10 µm) discrete samples (rosette),manual process (50
ml)
– Hiac Counter (5 – 100 µm) discrete (rosette) & continuous sampling,
automated (300 ml)
– PVM (100 – 1000 µm) continuous samplingvertical profiler
