Difference between revisions of "Brief Description"

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==Climate Models used by UKCA==
  
==Climate Models used by UKCA==
   
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The UKCA model runs within 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.
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The UKCA model runs within 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 are used for UKCA development.
   
 
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==UKCA: Currently Available Chemistry Schemes==
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* [[Standard Tropospheric Chemistry]]
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* [[Tropospheric Chemistry with Isoprene]]
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* [[Extended Tropospheric Chemistry (ExtTC)]]
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* [[Regional Air Quality (RAQ) Chemistry]]
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* [[Standard Stratospheric Chemistry]]
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* [[Chemistry of the Stratosphere and Troposphere]]
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==UKCA Aerosol Scheme: GLOMAP-mode==
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* [[Brief summary of GLOMAP-mode: global size-resolved aerosol microphysics]]
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* [[GLOMAP-mode in UKCA linked to Tropospheric Chemistry (StdTrop)]]
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* [[GLOMAP-mode in UKCA linked to Tropospheric Chemistry (IsopTrop)]]
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* [[GLOMAP-mode in UKCA linked to Stratospheric Chemistry (StratChem)]]
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* [[GLOMAP-mode in UKCA linked to whole-atmosphere chemistry (CheST)]]
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* [[Direct effect from GLOMAP-mode aerosol to the Edwards-Slingo radiation scheme]]
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* [[First indirect effect from GLOMAP-mode aerosol to the Edwards-Slingo radiation scheme]]
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==Nudging==
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* [[nudging | Description of the nudged version of UKCA]]: This describes the nudged version of the model which is constrained to meteorological analysis data, allowing hindcasts and comparisons to episodic data-sets.
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==UKCA Development Timeline==
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If you are interested in using UKCA, and there is a particular piece of functionality that you would like or need, but are not sure if it is available, please contact [mailto:Luke.Abraham@atm.ch.cam.ac.uk Luke Abraham] for further information.
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===Short-Term Development===
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* Stratospheric Chemistry at UM7.3 HadGEM3-A (N96L85 and N48L60) - Luke Abraham
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* ASAD Flux Diagnostics at UM7.3 - Luke Abraham
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* Improved representation of isoprene oxidation at UM6.1 - Alex Archibald
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* Chemistry of Stratosphere and Troposphere - CheST at UM7.3 - Alex Archibald
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* Flight track emulator to compare to campaign data at UM7.3 - Paul Telford
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* Fast-JX photolysis code validation at UM7.3 - Paul Telford
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* Emissions Profiling from ExTC at 7.3- Paul Telford & Maria Russo
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* Interactive biogenic emissions from ExTC at 7.3- Paul Telford
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===Medium-Term Development===
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* HadGEM3-AO UKCA - Luke Abraham
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* Satellite emulator, including averaging kernels, to improve validation at UM7.3 - Paul Telford
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* Couple mode aerosols and fast-jx code at UM7.3 - Paul Telford and ?
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* Shift UKCA emissions from Section 0 (user-defined) to Section 34 - Mohit Dalvi [[Sec34 emissions]]
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* Extend Weseley scheme dry deposition to match 2D scheme - Paul Telford
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===Long-Term Development===
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* Coupled UKCA Stratosphere-Troposphere Chemistry with MODE
   
 
==UKCA: Model Outline==
  
==UKCA: Model Outline==
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* New aerosol species and microphysics
  
* New aerosol species and microphysics
 
* Aerosol chemistry
  
* Aerosol chemistry
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* Integrated Climate Programme report (Mar10) comparing CLASSIC and GLOMAP-mode in HadGEM3 {{pdf|ICP reportM3_2v3.pdf|ICP Report M3}}.
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* Integrated Climate Programme report (Mar11) describing latest UKCA developments for HadGEM3 {{pdf|UKCA_ICP_Mar11.pdf|UKCA ICP March 2011}}.
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* Scoping document for HadGEM3 recommends including GLOMAP-mode in UKCA for HadGEM3 {{pdf|HadGEM3ES_scoping_v1.1.pdf|HadGEM3-ES Scoping document}}.
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* Coupling of GLOMAP-mode aerosol to UM radiation scheme {{pdf|UKCA_RADAER.pdf|UKCA RADAER}}.
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* UKCA internal report: Comparison of UKCA modal dust scheme against the 6-bin CLASSIC scheme within MetUM {{pdf|Dust_summary_180111.pdf|UKCAdust}}.
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* Integrated Climate Programme report (Feb12): UKCA merged code ready to form part of version 8.2 of the Unified Model {{pdf|ICP_reportD3.2.11b.pdf|UKCA ICP Feb12 (merged code)}}.
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* MACC Deliverable report (Dec11): Implementation and evaluation of GLOMAP-mode in the IFS {{pdf|D_G-AER_1.8_final_Dec22.pdf|MACC Deliverable report D_G-AER1.8 Dec11}}.
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* MACC-II Deliverable report (May13): Evaluation of aerosol optical depth in IFS-GLOMAP{{pdf|MACCII_AER_DEL_D_62_3.pdf|MACC Deliverable report D_AER_62.3 May13}}.
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===Aerosols Cloud Coupling===
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[[Aerosol Cloud Coupling]]: the modal UKCA scheme [Mann et al., 2010] has been coupled by Oxford and the MetOffice to the PC2 cloud scheme [Wilson et al., 2008] via an explicit Köhler theory based activation scheme [Abdul-Razzak & Ghan, 2000].
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* Features:
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** Sub-grid scale probability density function for updraft velocities coupled to turbulent kinetic energy
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** Coupling to cloud radiative properties (i.e. cloud albedo effects)
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** Coupling to precipitation formation scheme (i.e. cloud lifetime effects)
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* Publications:
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** West et al. (in preparation)
   
 
===New features===
  
===New features===

Latest revision as of 10:48, 13 June 2013

Climate Models used by UKCA

The UKCA model runs within 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 are 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: Currently Available Chemistry Schemes

UKCA Aerosol Scheme: GLOMAP-mode

Nudging

UKCA Development Timeline

If you are interested in using UKCA, and there is a particular piece of functionality that you would like or need, but are not sure if it is available, please contact Luke Abraham for further information.

Short-Term Development

  • Stratospheric Chemistry at UM7.3 HadGEM3-A (N96L85 and N48L60) - Luke Abraham
  • ASAD Flux Diagnostics at UM7.3 - Luke Abraham
  • Improved representation of isoprene oxidation at UM6.1 - Alex Archibald
  • Chemistry of Stratosphere and Troposphere - CheST at UM7.3 - Alex Archibald
  • Flight track emulator to compare to campaign data at UM7.3 - Paul Telford
  • Fast-JX photolysis code validation at UM7.3 - Paul Telford
  • Emissions Profiling from ExTC at 7.3- Paul Telford & Maria Russo
  • Interactive biogenic emissions from ExTC at 7.3- Paul Telford

Medium-Term Development

  • HadGEM3-AO UKCA - Luke Abraham
  • Satellite emulator, including averaging kernels, to improve validation at UM7.3 - Paul Telford
  • Couple mode aerosols and fast-jx code at UM7.3 - Paul Telford and ?
  • Shift UKCA emissions from Section 0 (user-defined) to Section 34 - Mohit Dalvi Sec34 emissions
  • Extend Weseley scheme dry deposition to match 2D scheme - Paul Telford

Long-Term Development

  • Coupled UKCA Stratosphere-Troposphere Chemistry with MODE

UKCA: Model Outline

Development of UKCA consists of the following subprojects:

Tropospheric model development

Stratospheric model development

Aerosols

  • New aerosol species and microphysics
  • Aerosol chemistry
  • Integrated Climate Programme report (Mar10) comparing CLASSIC and GLOMAP-mode in HadGEM3 Pdficon small.png ICP Report M3 Info circle.png.
  • Integrated Climate Programme report (Mar11) describing latest UKCA developments for HadGEM3 Pdficon small.png UKCA ICP March 2011 Info circle.png.
  • Scoping document for HadGEM3 recommends including GLOMAP-mode in UKCA for HadGEM3 Pdficon small.png HadGEM3-ES Scoping document Info circle.png.
  • Coupling of GLOMAP-mode aerosol to UM radiation scheme Pdficon small.png UKCA RADAER Info circle.png.
  • UKCA internal report: Comparison of UKCA modal dust scheme against the 6-bin CLASSIC scheme within MetUM Pdficon small.png UKCAdust Info circle.png.
  • Integrated Climate Programme report (Feb12): UKCA merged code ready to form part of version 8.2 of the Unified Model Pdficon small.png UKCA ICP Feb12 (merged code) Info circle.png.
  • MACC Deliverable report (Dec11): Implementation and evaluation of GLOMAP-mode in the IFS Pdficon small.png MACC Deliverable report D_G-AER1.8 Dec11 Info circle.png.
  • MACC-II Deliverable report (May13): Evaluation of aerosol optical depth in IFS-GLOMAPPdficon small.png MACC Deliverable report D_AER_62.3 May13 Info circle.png.

Aerosols Cloud Coupling

Aerosol Cloud Coupling: the modal UKCA scheme [Mann et al., 2010] has been coupled by Oxford and the MetOffice to the PC2 cloud scheme [Wilson et al., 2008] via an explicit Köhler theory based activation scheme [Abdul-Razzak & Ghan, 2000].

  • Features:
    • Sub-grid scale probability density function for updraft velocities coupled to turbulent kinetic energy
    • Coupling to cloud radiative properties (i.e. cloud albedo effects)
    • Coupling to precipitation formation scheme (i.e. cloud lifetime effects)
  • Publications:
    • West et al. (in preparation)

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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