image: nasa echam5/6 projects by quentin bourgeois, junbo cui, gabriela sousa santos, tanja stanelle...
Post on 22-Dec-2015
213 views
TRANSCRIPT
Imag
e: N
AS
A
ECHAM5/6 projects by Quentin Bourgeois, Junbo Cui, Gabriela Sousa Santos, Tanja StanelleC2SM’s research group - Isabelle Bey
Name (change on Slide Master)
Main questions:
• Arctic pollution: Quentin Bourgeois (ECHAM5-HAMMOZ, ECHAM5.5-HAM2)
• Dust emissions and export (focus on Asia): Junbo Cui (ECHAM5.5-HAM2)
• Impact of anthropogenic emissions on climate (inc. global and regional water cycle, focus on biomass burning emissions, period 1800-2000): Gabriela Sousa Santos (IMBALANCE project, ECHAM5.5-HAM2)
• Influence of anthropogenic land cover change on climate and air quality: Tanja Stanelle (MAIOLICA project, ECHAM6-HAM…)
2C2SM
Name (change on Slide Master) 3C2SM
Arctic pollution: Evaluating aerosol transport toward the Arctic:
Comparing seasonally averaged vertical profiles of extinction in the high and middle latitudes: •Observed CALIOP instrument•ECHAM5-HAMMOZ STD•NEW ECHAM5-HAMMOZ simulation with new scavenging coefficients
Next steps:- Interannual variability in transport of pollution to the Arctic- Impact of aerosols on the climate in the simulation with new scavengng coefficients (ECHAM5.5-HAM2)- Accounting for snow darkening
Bourgeois & Bey, JGR, in press
30-65°N
65-90°N
Spring Summer
Name (change on Slide Master) 4
Dust emissions and export (focus on Asia)Comparing aerosol extinction from CALIOP and from ECHAM5.5-HAM2
CALIOP
bb
ECHAM5.5-HAM2(Cheng et al. 2008 dust emission scheme)
Total aerosol Dust
i. a,b,c,d: 10 * 10 degree boxes selected along transport path.
ii. 1,2,3,4,5,6: ground based monitoring sites.
Name (change on Slide Master)
Impact of anthropogenic emissions on climate:Currently performing a number of Mixed Layer Ocean (MLO) simulations with new ACCMIP (IPCC) anthropogenic emissions
5C2SM
SimulationsAnthropogenic
processesVariables
Control 2000s BC, OC, SO2, SOA precursors
S1 2000s BC, OC, SO2
S22000s
BC, OC, SO2, new in-cloud scavenging parameters
S3 1950s BC, OC, SO2, SOA precursors
S4 1900s BC, OC, SO2, SOA precursors
S5 1850s BC, OC, SO2, SOA precursors
S6 1850s BC, OC, SO2
S7 tbd
BC, OC, SO2, SOA precursors, land use parameters
Name (change on Slide Master)
Surface temperature and precipitation
6C2SM
Impact of anthropogenic emissions on climate:Preliminary results:
Name (change on Slide Master)
Aerosol and Gas-Phase Aerosol and Gas-Phase Chemistry Module Chemistry Module
(HAMMOZ)(HAMMOZ)
Land Surface Component(JSBACH)
General Circulation Model
(ECHAM6)
GHG & aerosol concentrations,
Aerosol effect on clouds
Albedo, Roughness length, Heat and moist fluxes, LAI, etc.
Temperature, Humidity, etc.
Natural Emission Module e.g., Biogenic organic compounds,
Mineral dust, soil NOx
Winds, Temperature, Radiation, etc.
Emission fluxes
Vegetation types, LAI, roughness length, moist fluxes
Influence of anthropogenic land cover change on climate and air quality
Name (change on Slide Master) 8C2SM
Implementation of a dependency of natural emission routines on the land surface scheme of ECHAM6
• Dust emission routine
− New calculation of potential source areas (using JSBACH land cover description)− Use of roughness length computed by the model instead of constant (default) or satellite derived values
• BVOCs emission scheme
− New calculation of emission factors for idealized conditions− If time available: use another BVOC scheme to consider dependence of isoprene emissions on CO2 (scheme of A. Arneth)
Name (change on Slide Master) 9C2SM
Isoprene: Emission factors for idealized conditions
Isoprene emission factor for idealized conditions in µg/(m2h)
New
Preliminary result!
Original file: •Derived from external vegetation map (Guenther et al. (2006)•No interannual variations
New file:•Derived from vegetation map used in JSBACH•Variations with respect to used vegetation map (1st step: offline version, if running with dynamic vegetation, online version will be necessary)
Name (change on Slide Master)
Main questions:
• How does the model reproduce transport of pollution towards and pollution in the Arctic? ECHAM5-HAMMOZ, ECHAM5.5-HAM2 − Quentin Bourgeois
• How does the model reproduce dust emissions and export with a focus over Asia? ECHAM5.5-HAM2 − Junbo Cui
• How does anthropogenic emissions (of aerosols) have influenced past changes in climate inc. the global and regional water cycle, including a focus on biomass burning emissions? IMBALANCE project, ECHAM5.5-HAM2 − Gabriela Sousa Santos
• How does anthropogenic land cover change influence climate and air quality? MAIOLICA project, ECHAM6-HAM? − Tanja Stanelle
11C2SM
Name (change on Slide Master)
JSBACH: Only land points are considered, grid box is divided in up to 13 different tiles
8 different land cover classes: bare soil, glacier, lake, natural forest, natural grassland, other natural vegetation (shrubs, Tundra, Swamp), crops, pastures
Dust emissions will be considered as possible in areas with bare soil, natural grassland, other natural vegetation, crops, and pastures
Computation of dust emission flux for each land class separately, than weighting and summing up to total dust flux of grid cell.
Bare soil
Forest
Shrubs
Pasture/
grass
Crop
Bare soil = 1 – veg_ratio_max
Shrubs
1-exp(-laimax/2)
Tiles
e.g. grass
Seeding harvest time
LAI
crop
Name (change on Slide Master)
Land cover (-> BVOC, dust, NOx)
Anthr. emissions (industry, traffic …)
Concentration of methane and CO2
A1 (ctrl)
1600 1600 1600
A2 (1700),1800, 1900, 2000, 2100
1600 1600
A3 2000, 2100 2000, 2100 2000, 2100
Planned Studies:
Set A: Sensitivity experiments with ECHAM6-HAMMOZ-MLO Initial conditions for MLO for 1600 A1 100 years, A2 and A3 60 years
Set B: “Radiative forcing”, use of ECHAM6-HAMMOZ Restart from Millennium run (SST; SIC)
Start: 1st of January 1600, 1700, 1800, 1900, 2000, and 2100 11 years (including 1 year spin-up)