ICON‐A, the Atmosphere Component of the ICON Earth System Model: I. Model Description
| Autor: | Christine Nam, Rainer Schneck, Renate Brokopf, Elisa Manzini, Günther Zängl, Levi G. Silvers, Reiner Schnur, Luis Kornblueh, Thorsten Mauritsen, Hauke Schmidt, Mirjana Sakradzija, Martin Köhler, Stephanie Fiedler, Hui Wan, Daniel Reinert, Cathy Hohenegger, Jürgen Helmert, Thomas Raddatz, Traute Crueger, Monika Esch, Bjorn Stevens, Sebastian Rast, Marco Giorgetta |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
Meteorology 010502 geochemistry & geophysics 01 natural sciences Atmosphere lcsh:Oceanography Model tuning Component (UML) Environmental Chemistry Earth system model lcsh:GC1-1581 lcsh:Physical geography Physics::Atmospheric and Oceanic Physics 0105 earth and related environmental sciences computer.programming_language Global and Planetary Change Model description ICON‐A General Circulation Model model description General Earth and Planetary Sciences Environmental science model tuning Icon lcsh:GB3-5030 computer atmospheric GCM |
| Zdroj: | Journal of Advances in Modeling Earth Systems, Vol 10, Iss 7, Pp 1613-1637 (2018) Journal of Advances in Modeling Earth Systems |
| ISSN: | 1942-2466 |
| Popis: | ICON‐A is the new icosahedral nonhydrostatic (ICON) atmospheric general circulation model in a configuration using the Max Planck Institute physics package, which originates from the ECHAM6 general circulation model, and has been adapted to account for the changed dynamical core framework. The coupling scheme between dynamics and physics employs a sequential updating by dynamics and physics, and a fixed sequence of the physical processes similar to ECHAM6. To allow a meaningful initial comparison between ICON‐A and the established ECHAM6‐LR model, a setup with similar, low resolution in terms of number of grid points and levels is chosen. The ICON‐A model is tuned on the base of the Atmospheric Model Intercomparison Project (AMIP) experiment aiming primarily at a well balanced top‐of atmosphere energy budget to make the model suitable for coupled climate and Earth system modeling. The tuning addresses first the moisture and cloud distribution to achieve the top‐of‐atmosphere energy balance, followed by the tuning of the parameterized dynamic drag aiming at reduced wind errors in the troposphere. The resulting version of ICON‐A has overall biases, which are comparable to those of ECHAM6. Problematic specific biases remain in the vertical distribution of clouds and in the stratospheric circulation, where the winter vortices are too weak. Biases in precipitable water and tropospheric temperature are, however, reduced compared to the ECHAM6. ICON‐A will serve as the basis of further development and as the atmosphere component to the coupled model, ICON‐Earth system model (ESM). |
| Databáze: | OpenAIRE |
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