ORCHIDEE-Dev : January 8th, 2013 Theme #1 Water cycle, river flows, water quality and interactions with biosphere under future climate Réservoir souterrain Réservoir fleuve 10 0 m 10 1 m 10 5 m D Rs E Soil : •Choisnel vs. CWRR •Temperature, permafrost River routing, wetlands, biogeochemical cycles ET and climate interactions 2 sessions : « Hydrology » and « Energy budget and cold Processes »
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ORCHIDEE-Dev : January 8th, 2013 Theme #1 Water cycle, river flows, water quality and interactions with biosphere under future climate Réservoir souterrain.
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ORCHIDEE-Dev : January 8th, 2013
Theme #1
Water cycle, river flows, water quality and interactions with biosphere under future climate
Réservoir souterrain
Réservoir fleuve
100 m101 m
105 m
D
Rs
ESoil : •Choisnel vs. CWRR•Temperature, permafrost
River routing, wetlands, biogeochemical cycles
ET and climate interactions
2 sessions : « Hydrology » and « Energy budget and cold Processes »
ORCHIDEE-Dev : January 8th, 2013
Theme #1
Water cycle, river flows, water quality and interactions with biosphere under future climate
Session « Hydrology » :
•Aurélien Campoy : Coupled simulations with ORCHIDEE-CWRR
•Matthieu Guimberteau : The Amazon River Basin under change
•Marta Camino : Factors influencing DOC leaching from terrestrial ecosystems
•Anaïs Barella : Potential evaporation computation through an unstressed surface energy balance and its sensitivity to climate change effect
•Jan Polcher ?
LMDZOR avec la nouvelle hydrologie
Commit 1119: de nombreuses corrections apportées à ORCHIDEE pour pouvoir être couplé à LMDZ, avec tout les checks possibles.
1-Nouveau diagnostique de l’évaporation du sol nu.2-Humidités du sol hors bornes.3-Bug des petites fractions de PFT et frac_nobio4-Gestion des changements de végétation
96x95
Sensibilité du climat à l’hydrologie continentale
• Configuration des expériences:– ORCHIDEE couplé à LMDZ AR4 96x95x39– Sans STOMATE (Carte de végétation lue)– Températures océaniques imposées– Composition atmosphérique imposée
• 2 périodes étudiées sur des runs de 30 ans:– Présent (1998)– Futur (2070)
• 3 configurations d’ORCHIDEE:– BiCouche (qui a un drainage libre au fond)– Multicouche avec drainage libre au fond (11 couches)– Multicouche avec fond imperméable (101 couches)
- Global effect of irrigation and its impact on the onset of the Indian summer monsoon(Guimberteau & al., 2012, Clim. Dyn.)=> when irrigation is activated :- delayed monsoon onset + weakened monsoon- summer precipitation increase (decrease) over western (eastern) Mississippi
- A comprehensive approach to analyze discrepancies between land surface models and in-situ measurements: a case study over the US and Illinois with SECHIBA forced by NLDAS(Guimberteau & al., 2012, HESS)=> improvement of simulated soil moisture through sensitivity tests of vegetation parameters + use of a different evapotranspiration computation and precipitation input
- Discharge simulation in the sub-basins of the Amazon using ORCHIDEE forced by new datasets(Guimberteau & al., 2012, HESS)=> improvement of simulated discharges with new data sets of daily precipitation forcing & floodplains/swamps spatial coverage
- Future changes in precipitation and impacts on extreme streamflow over Amazonian sub-basins(Guimberteau & al., sub. to ERL)=> see next slide
Matthieu GUIMBERTEAUMatthieu GUIMBERTEAUPost-doc IPSL-SISYPHE-LSCEWork on ORCHIDEE: since 2006Main research topics: hydrology, water cycle, irrigation,streamflow, LSM assessment, Amazonian hydrologyMail: [email protected] page: http://www.sisyphe.upmc.fr/~guimberteau/
Past researchesPast researches Present research: Amazon River basinPresent research: Amazon River basin
- 2lay./11lay. hydrology comparison and assessment- Improvement of hydrology: soil & rooting depths, soil hydraulic properties - Soil water infiltration according to the offline precipitation spread over the time-step- Impact of LUC and Climate Change on hydrology
Future changes in precipitation and impacts on extremeFuture changes in precipitation and impacts on extremestreamflow over Amazonian sub-basins (Guimberteau & al., sub. to ERL)streamflow over Amazonian sub-basins (Guimberteau & al., sub. to ERL)
Construction of future climate forcings (delta downscaling method): for each of the 8 AR4 GCMs=> 20yr-climatology for each variable => computation of anomalies between future and present-time=> addition of anomalies on each 6h NCC time-step (NCC previously corrected by daily precipitation
dataset) ORCHIDEE forced by 8 different future climate forcings => comparison with present-time simulation
Mean relative change (%) of the low flows for 16 stations(for each of the eight simulations, differences performed between each
future year and the present-time seasonality)
Result for 2046-2065 under SRESA1B scenario
Number of GCMs out of eight that project a JJA precipitation increase
Southern sub-basins (with low runoff coefficients (R/P)) will become more responsive to precipitation change than the western sub-basins (with high runoff coefficients)
Western and north-western sub-basins: more responsive to evaporation change
Factors influencing DOC leaching from terrestrial ecosystems
Main focus: to incorporate a module of dissolved organic carbon (DOC) leaching from terrestrial ecosystems into ORCHIDEE.
- Two phases:1) A database development in order to establish quantitative relationships between terrestrial DOC concentration and fluxes and their drivers (UA).2) Model development: improve process description to incorporate DOC leaching in ORCHIDEE(LSCE).
The observed relationships from the database will be used to parameterize in ORCHIDEE the spatial and temporal (intra and inter-annual) variability of DOC amongst ecosystems types.
Figure 1. Vertical pattern of DOC concentration in soil solution for broadleaved and coniferous forest sites.
Supervisors: Sebastiaan Luyssaert, Philippe Ciais (LSCE), Ivan Janssens (UA)
Marta Camino
SOIL MODULE IN ORCHIDEE
Factors influencing DOC leaching from terrestrial ecosystems
• Tasks to develop in ORCHIDEE:
1. Changes in code in ORCHIDEE: 1.1. Include DOC as a carbon pool (equations for decomposition, sorption/desorption) –Bertrand- 1.2. SWC and Drainage from 11 layers Hydrological Module (DOC concentration and fluxes) –Agnes, Matthieu, Aurélien- 1.3. Discretization of C and DOC in soil (together with tracers) -Camille-