1 / 8

ORCHIDEE-Dev : January 8th, 2013 Theme #1

ORCHIDEE-Dev : January 8th, 2013 Theme #1 Water cycle, river flows, water quality and interactions with biosphere under future climate. 2 sessions : Hydrology and Cold Processes. ET and climate interactions. E. Soil : Choisnel vs. CWRR Temperature , permafrost. Rs.

vaughan-ware
Download Presentation

ORCHIDEE-Dev : January 8th, 2013 Theme #1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ORCHIDEE-Dev : January 8th, 2013 Theme #1 Water cycle, river flows, water quality and interactions with biosphere under future climate 2 sessions : Hydrology and Cold Processes ET and climate interactions E • Soil : • Choisnel vs. CWRR • Temperature, permafrost Rs River routing, wetlands, biogeochemical cycles 100 m D 101 m Réservoir souterrain Réservoir fleuve 105 m

  2. ORCHIDEE-Dev : January 8th, 2013 Theme #1 Water cycle, river flows, water quality and interactions with biosphere under future climate • Session Hydrology : • Anaïs Barella : Potential evaporation computation through an unstressed surface energy balance and its sensitivity to climate change effect • Matthieu Guimberteau : The Amazon River Basin under change • Marta Camino : Factors influencing DOC leaching from terrestrial ecosystems • AurélienCampoy • Jan Polcher

  3. Matthieu GUIMBERTEAU Post-doc IPSL-SISYPHE-LSCE Work on ORCHIDEE: since 2006 Main research topics: hydrology, water cycle, irrigation, streamflow, LSM assessment, Amazonian hydrology Mail: matthieu.guimberteau@upmc.fr Web page: http://www.sisyphe.upmc.fr/~guimberteau/ Past researches Present research: Amazon River basin - 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 - 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 In the framework of the AMAZALERT project - 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

  4. Future changes in precipitation and impacts on extreme 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 Result for 2046-2065 under SRESA1B scenario 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) 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

  5. Marta Camino Supervisors: Sebastiaan Luyssaert, Philippe Ciais (LSCE), Ivan Janssens (UA) 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. Factors influencing DOC leaching from terrestrial ecosystems Figure 1. Vertical pattern of DOC concentration in soil solution for broadleaved and coniferous forest sites.

  6. Factors influencing DOC leaching from terrestrial ecosystems Marta Camino • 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- • 2. Parameterization (literature/database results) • 3. Validation (stream DOC fluxes) SOIL MODULE IN ORCHIDEE

More Related