SURFEX-TRIP model driven by MESCAN

SURFEX-TRIP model
driven by MESCAN
P. Le Moigne, C. Szczypta, B. Decharme
A. Verrelle, R. Abida and E. Bazile
GA3 UERRA – Toulouse 1-3 February 2016
Outline
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Introduction
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Surfex model configuration
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Hydrologic Trip model
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Workplan 2016-2017
GA3 UERRA – Toulouse 1-3 February 2016
Introduction
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Objectives within UERRA project
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To produce surface reanalysis over Europe at high resolution
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Driven by the MESCAN analysis (CNRM & SMHI)
To run the hydrologic TRIP model
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Evaluation of discharges of the main rivers
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Comparison to the E-HYPE hydrologic model
To get ready for Copernicus framework
State of the art
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A set of 4-yr MESCAN-SURFEX simulations
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EURO4M project: 2007-2010
Ongoing work on MESCAN (CNRM)
GA3 UERRA – Toulouse 1-3 February 2016
Surfex model configuration
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Principle of Surfex
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Atmospheric variables from MESCAN reanalysis
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Surface databases
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Air temperature and humidity, wind speed, incoming radiations, rain and
snow
Vegetation, orography, soil textures
Models for each surface type
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Only ISBA model activated (vegetated areas)
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Options defined by Namelists
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Diffusion scheme for heat and water transfer in the soil
ISBA-ES snow model
Simple photosynthesis based on Jarvis
GA3 UERRA – Toulouse 1-3 February 2016
Surfex model configuration
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Update with latest Surfex v8 version
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Improvement of ISBA-ES snow model
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10 layers to better solve the diurnal cycle
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Snow compaction and densification of layers
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Implementation of spectral albedo
Daily mean annual cycle of snow depth
at Col de Porte – French Alps – 18-yrs
GA3 UERRA – Toulouse 1-3 February 2016
Hydrologic TRIP model
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TRIP within CNRM-CM5 (French global climate model)
External forcings
Aerosols
GHGs
Solar irradiance
Atmosphere
ARPEGE-Climat v5.2
T127 (1.5°), 31 levels
SURFEX (externalised surface)
24h
24h
Land surface
ISBA
OASIS
v3
24h
Sea Ice
GELATO v5
Ocean
NEMO v3.2 1°, 42 levels
24h
Voldoire et al. 2012
GA3 UERRA – Toulouse 1-3 February 2016
River Routing
TRIP
Hydrologic TRIP model
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TRIP processes
every time step
daily
Surface runoff
Drainage
Evapotranspiration
Canopy evaporation
Soil ice sublimation
Snow sublimation
Snow melting
Surface runoff
Drainage
TRIP
SURFEX
(Decharme et al. 2012)
GA3 UERRA – Toulouse 1-3 February 2016
Hydrologic TRIP model
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TRIP processes
every time step
Hydrologic network to route the surface runoff
daily
Surface runoff
Drainage
dS
=Q in −Q out
dt
Mass
Input Flux
flux
Discharge
Evapotranspiration
Canopy evaporation
Soil ice sublimation
Snow sublimation
Snow melting
Surface runoff
Drainage
TRIP
v
Qout = S
L
Output
Discharge
SURFEX
(Decharme et al. 2012)
GA3 UERRA – Toulouse 1-3 February 2016
Hydrologic TRIP model
Global map of Aquifers
1/12°
Aquifers, watersheds and rivers over France
GA3 UERRA – Toulouse 1-3 February 2016
0.5°
Workplan 2016-2017
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MESCAN-SURFEX
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4-yr EURO4M dataset, Surfex v8
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To produce a reference run (surface fluxes, snow variables, etc.)
MESCAN-SURFEX-TRIP
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4-yr EURO4M dataset, Surfex v8
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Call of TRIP via OASIS at 0.5° resolution
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Both Surfex and Trip run separately
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Evaluation against discharges of main European rivers
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Comparison with E-HYPE model
MESCAN-SURFEX-TRIP-HR
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Develop a routing system at High Resolution
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From 0.5° to 1/12° (~10km), using a DEM at 1/12°
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Use the aquifer model (with characteristics at 0.5° resolution)
Simulations over the 50-yr UERRA reanalysis period
GA3 UERRA – Toulouse 1-3 February 2016
Thanks for your attention !!
Acknowledgment:
To the EU FP7-SPACE-2013-1 under grant agreement n° 607193
GA3 UERRA – Toulouse 1-3 February 2016