World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0021091534
Reproduction Date:

Title: Echam  
Author: World Heritage Encyclopedia
Language: English
Subject: Climate model, JULES, Interaction Soil-Biosphere-Atmosphere, North American Mesoscale Model, Transport Chemical Aerosol Model
Publisher: World Heritage Encyclopedia


ECHAM is a Max Planck Society. It was created by modifiying global forecast models developed by ECMWF to be used for climate research. The model was given its name as a combination of its origin (the 'EC' being short for 'ECMWF') and the place of development of its parameterisation package, Hamburg. The default configuration of the model resolves the atmosphere up to 10 hectopascals (primarily used to study the lower atmosphere), but it can be reconfigured to 0.01 hPa for use in studying the stratosphere and lower mesosphere.[1]

Different versions of ECHAM, primarily different configurations of ECHAM5, have been the basis of many publications, listed on the ECHAM5 website [1].


Compared to its predecessor, ECHAM4, it is more portable and flexible (it is now coded in Fortran 95), and because of both major and minor changes to the different parts of code that it uses, it produces a significantly different simulated climate.[2]

MPI-ECHAM5 was recently used in the IPCC Fourth Assessment Report, alongside many other GCMs from different countries.[3] In the data of this report, it is referred to with the abbreviation MPEH5.[4]

It appears to be one of the better Global Climate Models.[5]


It is currently the most advanced version of the ECHAM models. ECHAM6 is an atmospheric general circulation model, and as such focuses on the coupling between diabatic processes and large-scale circulations, both of which are ultimately driven by radiative forcing. It consists of a dry spectral-transform dynamical core, a transport model for scalar quantities other than temperature and surface pressure, a suite of physical parameterizations for the representation of diabatic processes, as well as bound ary data sets for externalized parameters, such as trace gas and aerosol distributions, tabulations of gas absorption optical properties, temporal variations in spectral solar irradiance, land-surface properties, etc.

The major changes relative to ECHAM5 include: An improved representation of radiative transfer in the shortwave (or solar) part of the spectrum; a completely new description of the aerosol; an improved representation of surface albedo, including the treatment of melt-ponds on sea-ice; and a greatly improved representation of the middle-atmosphere as part of the standard model. In addition, minor changes have been made in the representation of convective processes, and through the choice of a slightly different vertical discretization within the troposphere, as well as changed model parameters.[6]


  1. ^ "MPI: ECHAM Page". Max Planck Institute for Meteorology. Retrieved December 2008. 
  2. ^ Roeckner E., et al. "The atmospheric general circulation model ECHAM 5. PART I: Model description" (PDF). Retrieved January 2009. 
  3. ^ IPCC Data Distribution Centre. "IPCC-DDC: SRES-AR4 GCM data". Retrieved January 2009. 
  4. ^ Max Planck Institute for Meteorology. "Modelle & Daten model abbreviations". Retrieved February 2009. 
  5. ^  
  6. ^

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.