Image: NASA ECHAM5/6 projects by Quentin Bourgeois, Junbo Cui, Gabriela Sousa Santos, Tanja Stanelle C2SM’s research group - Isabelle Bey

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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.


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



S6 1850s BC, OC, SO2

S7 tbd

BC, OC, SO2, SOA precursors, land use parameters


Surface temperature and precipitation

6C2SM

Impact of anthropogenic emissions on climate:Preliminary results:


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


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)


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)


BACKUP SLIDES

10C2SM


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


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


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)


MLO simulations:

50 m mixed layer

H – net surface heat flux

Documents

Image: NASA ECHAM5/6 projects by Quentin Bourgeois, Junbo Cui, Gabriela Sousa Santos, Tanja Stanelle C2SM’s research group - Isabelle Bey