English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

An improvement on the dust emission scheme in the global aerosol-climate model ECHAM5-HAM

MPS-Authors
/persons/resource/persons37289

Peng,  Y.
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

/persons/resource/persons37144

Feichter,  J.
The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)

acp-8-1105-2008.pdf
(Publisher version), 2MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Cheng, T., Peng, Y., Feichter, J., & Tegen, I. (2008). An improvement on the dust emission scheme in the global aerosol-climate model ECHAM5-HAM. Atmospheric Chemistry and Physics, 8, 1105-1117. doi:10.5194/acp-8-1105-2008.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-FA12-A
Abstract
ormulation of the dust emission scheme in the global aerosol-climate modeling system ECHAM5-HAM has been improved. Modifications on the surface aerodynamic roughness length, soil moisture and East-Asian soil properties are included in the parameterization, which result in a large impact on the threshold wind friction velocity for aeolian erosion and thus influence the simulated dust emission amount. The annual global mean of dust emission in the year 2000 is reduced by 76.5% and 2.2%, respectively, due to changes in the aerodynamic roughness length and the soil moisture. An inclusion of detailed East-Asian soil properties leads to an increase of 16.6% in the annual global mean of dust emission, which exhibits mainly in the arid and semi-arid areas of northern China and southern Mongolia. Measurements of the surface dust concentrations are collected in remote marine sites globally and in dust source regions of East Asia. The averaged relative differences between model results and measurements are reduced from 17% to 12% in global remote marine sites and from 69% to 30% in East Asia, by including the improvements. Comparisons between model results and available measurements verify a more realistic dust distribution with the improved emission scheme.