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 CO 2.

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