As the LBA “Community,” we have a set of “linked” questions (possibly, with a common solution):
•What are hydrologic flow paths and magnitudes?•How are CO2 and OM mobilized from the land surface to and through fluvial systems? • What controls transformations of N from land to streams?
•HOW CAN WE PULL IT TOGETHER?
Towards a Model of Carbon Mobilization, Advection, and Reaction in the Amazon
River
physical forcing via remote sensing
(solar radiation, FPAR, rainfall, temperature)
terrestrial NPP
and biomass turnover
via CASA ecosystem model
hydrology
via VIC model
soil biogeochemistry
via ROMBUS model
aquatic biogeochemistry
via ROMBUS model
geographical properties via GIS
(vegetation, soil, topography, river network, etc.)
DOC, DIC
CO2
evasion
heterotrophicrespiration
DOC
POCDIC
CO2
fixation
water flux
carbon flux
autotrophicrespiration
SISTEMA DE “INFORMATICA”
HMW DOC(1-30 kDa)
LMW DOC(<1 kDa)
CH4
Mineral-Associated OM(FPOM) (0.1 µm - 63 µm)
HMW FPOC(1-30 kDa)
LMW FPOC(<1 kDa)
Detrital Particulate Organic Matter (>2mm)
Production via Terrestrial Biosphere Model
Living Organic Carbon
Biotic fluxes
Abiotic fluxes
CPOC
CO2CO2, CH4
Black Carbon(soot and charcoal)
Dissolved Organic Matter(DOM) (>0.1 µm)
Particulate Organic Matter(CPOM) (63 um - 2 mm)DIC
VHMW DOC(>30 kDa)
VHMW FPOC(>30 kDa)
Structural Carbon(insoluble)
Metabolic Carbon(soluble)
“MESO/MACROSCALE: Variable Infiltration Capacity –n Layer (VIC-nL), with River Routing Scheme
Ji-Parana (Victoria et al). ~8km
Micro/Mesoscale: Distributed Hydrology-Soil Vegetation Model (DHSVM) (~150m/>150m?)
Mae Chaem, Chiang Mai, Thailand
Vegetation scenarios
No crops Double crop Double crops Double crops uniformly in highlands in lowlands
Daily discharge at basin outlet
Needs for a “River basin Organic Matter and
Biogeochemistry Synthesis Model”
• Uses measurable and mechanistically meaningful pools
– CPOM
– FPOM
– DOM
• Capacity to model processes
– Mineralization (OCCO2)
– Degradation (OCfastOCslow)
– Sorption (DOC FPOC)Mayorga & Aufdenkampe, 2002
HMW DOC(1-30 kDa)
LMW DOC(<1 kDa)
CH4
Mineral-Associated OM(FPOM) (0.1 µm - 63 µm)
HMW FPOC(1-30 kDa)
LMW FPOC(<1 kDa)
Detrital Particulate Organic Matter (>2mm)
Production via Terrestrial Biosphere Model
Living Organic Carbon
CPOC
CO2CO2, CH4
Black C (soot and charcoal)
DOM (>0.1 µm)
CPOM (63 um - 2 mm)DIC
VHMW DOC(>30 kDa)
VHMW FPOC(>30 kDa)
Structural C(insoluble)
Metabolic C(soluble)
LMW DON(200-1000Da)
VLMW DON(<200Da)
NH4
LMW FPON(200-1000Da)
VLMW FPON(<200Da)
Detrital Particulate Organic Matter (>2 mm)
Structural N(insoluble)
Metabolic N(soluble)
Production via Terrestrial Biosphere Model
Living Organic Nitrogen
CPON
Sorbed NH4
CPOM (63 um - 2 mm)
NO3
N2, NOx
NH3
Mineral-Associated OM (FPOM)
(0.1 µm - 63 µm)VHMW DON
(>30 kDa)VHMW FPON
(>30 kDa)
DOM (>0.1 µm)
Carbon Nitrogen
Biotic fluxes
Abiotic fluxes
ROMBUS (River basin Organic Matter and Biogeochemistry Synthesis Model)
River Network Element(P 0, specifically for in-channel routing & evolution of wash load and bed load, and calculating transfer to FP and channel bed)
Delta & Ocean Sinks
Floodplain Storage Channel Bed Storage(Element significance decreases DS)
Do
wn
stre
am
tran
spo
rt
(Element significance increases DS)
Upland Source Element(Production > | Storage|, physically &chemically converts rock to sediment)
Colluvial Buffer Element( |S| > P, controls sediment delivery ratioby regulating delivery to channel network)
Do
wn
-zo
ne
tran
spo
rt
Floodplain Lakes (permanent)
Do
wn
-zo
ne
tran
spo
rt
SEDIMENT TRANSPORT MODEL SEDIMENT TRANSPORT MODEL
Rolf Aalto
MAO
Ji-PRB
Jur
Snt
AF
Pach
DHSVM (?) Detailed site -> upscaling?
“detailed” LBA-team sites
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