Brief Description: Difference between revisions

Revision as of 10:26, 14 July 2010

Climate Models used by UKCA

The UKCA model is based on the Hadley Centre version of the Unified Model. There are a number of different versions of this climate model at a number of resolutions which is used for UKCA development.

UM Version	Model	Horizontal Resolution	Vertical Levels	Model Top	Scheme Used
6.1	HadGAM1a	N48 (2.5°×3.75°)	L60	~84km	Tropospheric Chemistry
6.1	HadGAM2	N48	L60	~84km	Stratospheric Chemistry
6.6.4	HadGEM2-ES	N96	L38	~40km	Hadley Centre Earth System Model
7.1	HadGEM3-A	N96 (1.25°×1.875°)	L38	~40km	Tropospheric Chemistry
7.3	HadGEM3-A r2.0	N96	L38	~40km	Tropospheric Chemistry
7.3	HadGEM3-A r2.0	N96	L63	~40km	Tropospheric Chemistry
7.3	HadGEM3-A r2.0	N96	L85	85km	Stratospheric Chemistry
7.3	HadGEM3-A r2.0	N48	L60	~84km	Stratospheric Chemistry
7.3	HadGEM3-AO r2.0	N48	L60	~84km	QUEST Earth System Model

UKCA: Model Outline

Development of UKCA consists of the following subprojects:

Tropospheric model development

HadGEM3 at N96L63
Tropospheric chemistry schemes

Stratospheric model

HadGEM3 at N96L85/N48L60

Aerosols

New aerosol species and microphysics
Aerosol chemistry

New features

Coupled chemistry, aerosols and climate model
Based on new dynamics
Combined troposphere-stratosphere chemistry
Improved aerosol microphysics and chemistry
Capability to interact with surface, radiation and biosphere
Modular structure

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+==Climate Models used by UKCA==
+The UKCA model is based on the Hadley Centre version of the Unified Model. There are a number of different versions of this climate model at a number of resolutions which is used for UKCA development.
+{| border="1"
+! UM Version || Model ||Horizontal Resolution ||Vertical Levels ||Model Top || Scheme Used
+|-
+|6.1 || HadGAM1a || N48 (2.5&deg;&times;3.75&deg;) || L60 || ~84km || Tropospheric Chemistry
+|-
+|6.1 || HadGAM2 || N48  || L60 || ~84km || Stratospheric Chemistry
+|-
+|6.6.4 || HadGEM2-ES || N96 || L38 || ~40km || Hadley Centre Earth System Model
+|-
+|7.1 || HadGEM3-A || N96 (1.25&deg;&times;1.875&deg;) || L38 || ~40km || Tropospheric Chemistry
+|-
+|7.3 || HadGEM3-A r2.0 || N96  || L38 || ~40km || Tropospheric Chemistry
+|-
+|7.3 || HadGEM3-A r2.0 || N96  || L63 || ~40km || Tropospheric Chemistry
+|-
+|7.3 || HadGEM3-A r2.0 || N96  || L85 || &nbsp;&nbsp;85km || Stratospheric Chemistry
+|-
+|7.3 || HadGEM3-A r2.0 || N48  || L60 || ~84km || Stratospheric Chemistry
+|-
+|7.3 || HadGEM3-AO r2.0 || N48 || L60 || ~84km || QUEST Earth System Model
+|-
+|}
 ==UKCA: Model Outline==
-The UKCA model is based on the Hadley Centre version of the Unified Model: HadGAM. Development of UKCA consists of the following subprojects:
+Development of UKCA consists of the following subprojects:
 ===Tropospheric model development===
-* HadGAM at N48L38
+* HadGEM3 at N96L63
 * Tropospheric chemistry schemes
-===Stratospheric+Tropospheric model===
+===Stratospheric model===
-* HadGAM at N48L60
+* HadGEM3 at N96L85/N48L60
 ===Aerosols===