Bio-optical studies in the Argentine Sea

Bio-optical studies in the Argentine Sea
Dra. A. I. Dogliotti
Instituto de Astronomía y Física del Espacio (IAFE)
National
Dra. G. Williams (CENPAT - CONICET)
Dra. C. Simionato (CIMA & DCAO - UBA)
Dra. V. Lutz (IIMyC & INIDEP)
Lic. J.I. Gossn (IAFE)
Lic. I. Tropper (CONAE)
10th Aquarius/SAC-D Science Meeting
International
• Dr. K. Ruddick (OD Nature, Belguim)
• Dr. D. Doxaran (LOV, France)
• Dr. R. Foruin (Scripps, USA)
• Dr. P. Larrouche (Rimousky, Canada)
• Dr. C.A.E. Garcia (FURG, Brazil)
17-19 Nov. 2015 – Buenos Aires, Argentina
Argentinean Sea
Image provided by Proyecto Modelo del Mar (M.R. Marin, CENPAT, CONICET)
Argentine Sea from a above
10th Aquarius/SAC-D Science Meeting
17-19 Nov. 2015 – Buenos Aires, Argentina
Río de la Plata
(highly turbid waters)
Phytoplankton
Blooms
Low Chl-a
High Chl-a
Ocean color Remote Sensing
Improve the retrieval of optically active components of the
water column (like chlorophyll and total suspended matter
concentration) using ocean color remote sensing in the
Argentinean Continental shelf and shelf-break regions.
• Product and algorithm validation
• Algorithm development
• Field Measurements (Cal/Val)
• Applications
10th Aquarius/SAC-D Science Meeting
17-19 Nov. 2015 – Buenos Aires, Argentina
Shelf: Validation Chl-a products (SW & MA)
ARGAU Spring and Fall cruises (2001-2004) (Sub-surface Chl-a)
Chla- sat
Match-up analysis (global/local algorithms)
Chla- in situ
(Dogliotti et al. 2009)
10th Aquarius/SAC-D Science Meeting
17-19 Nov. 2015 – Buenos Aires, Argentina
Shelf: Primary Production Modeling
OUTPUT
INPUT
Satellite data
Chl-a
PAR
SST
Kd(PAR)
BIOM
VGPM
Eppley
α y Pm (photosinthetic parameters)
D
Kd(PAR)
SST
ClaPAR
Modeled PP
 
PP Map
PP  B  PmB   1  exp   B  I ( z, t ) / PmB

t z
(Dogliotti et al. 2014)
1) 5 models were evaluated using in situ data
(Dogliotti et al. 2014)
10th Aquarius/SAC-D Science Meeting
17-19 Nov. 2015 – Buenos Aires, Argentina
2) Evalaution of satellite-derived products (Chl-a, Kd, PAR)
(Dogliotti et al. 2014)
10th Aquarius/SAC-D Science Meeting
17-19 Nov. 2015 – Buenos Aires, Argentina
3) Evaluation of satellite-derived PP using best model
(BIOM) and satellite data (field  B & PmB )
(Dogliotti et al. 2014)
10th Aquarius/SAC-D Science Meeting
17-19 Nov. 2015 – Buenos Aires, Argentina
Shelf: Coccolithophorid Bloom
Previous satellite image analysis suggested the occurrence of coccolithophorid
blooms in the Patagonian Region
Emiliania huxleyii
GLOBAL DISTRIBUTION
Brown and Yoder 1994
Shelf: Coccolithophorid Bloom
Field campaign in January 2008 (Brazil)
- Chl-a
- Particulate Inorganic Carbon (PIC)
- Reflectance: HyperPRO (Satlantic) in-water (FURG)
(Garcia et al. 2011)
Shelf: Chl-a and PIC estimates in a Cocco bloom
Chl-a
PIC
Chla- in situ
b*
Reflectance - in situ
(Garcia et al. 2011)
San Matías Gulf: satellite products validation
(Williams et al. 2013)
San Matías Gulf: satellite products validation
SST
Chl-a
(Williams et al. 2013)
San Matías Gulf: Radiometric measurements
19 Feb 2013
- Chl-a
- Reflectance: ASD Field Spec
- Above-water (CONAE)
Product evaluation
Algorithm evaluation
San Jorge Gulf: product validation
PROMESS Program
-> Project MARES
-> PARADISE
Campaign on board CORIOLIS II
From 30 Jan to 8 Feb 2014
- IOPs (abs)
- Reflectance (ASD)
- TSM
- PSD (LISST)
PARADISE
(PAssive and RADar Imaging of the San Jorge
Ecosystem)
Pierre Larouche (Canada), A. Dogliotti, G.Williams
• Characterize the optical properties of the SJG
• Validate ocean color remote sensing products that
estimate phytoplankton biomass
• Use archived satellite imagery to detect and estimate
seasonal/inter-annual variability of phytoplankton
Río de la Plata: Algorithm develop and evaluation
 Large funnel-shape estuary and shallow waters (<20m);
Characterize
 Drains 2da largest basin in SA (22,000 m3/s)
 High TSM concentrations (100-300 mg/l)
 Turbidity front (topography)
Montevideo
Buenos Aires
100 km
MODIS
Río de la Plata: Atmospheric Correction
First Cualitative analysis of existing AC algo
1) Standard NIR approach (NASA)
2) SWIR bands
3) SWIR bands assuming spatial homogeneity of aerosol type)
Need radiometric field measurements!!!
(Dogliotti et al. 2011)
Río de la Plata: Field campaigns
• Campaigns
- Fishermen Pier (BA)
- BsAs-Colonia crossing
- Pta. Piedras campaigns
Collaboration
- IAFE
- DCAO & CIMA
- CONAE
- FIPCA
- Researchers and students
Río de la Plata: Turbidity algorithm
645 nm
ρw
748 nm
859 nm
T (NFU)
(Dogliotti et al. 2015)
Current and Future Activities
• Active collaboration with SABIA/MAR Mission (CONAE)
• Setup a AERONET-OC Cal/Val station in the Río de la Plata
• Increase
amount
(collaborations)
and
type
of
measurements
Thank you!