Developing UKESM

Results from VN10.6 GA7.1 + CheST (StratTrop chemistry) +GLOMAP (proto UKESM/ next Release)

Model Run	Chemistry	Aerosol-microphys	Aerosol-optical	Owner	UM version	Monsoon job ID	Met Office ID	Link to chemistry evaluation	Link to aerosol evaluation	Link to Validation Note	Comments
AMIP	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/ Gas-phase RF ON	Mohit Dalvi	10.6.1 GA7.1 N96 AMIP	u-aj841	u-ai181 / mi-aj670	ukca_chem_eval_aj670.pdf ukca_chem_eval_ac691_aj670.pdf | UKESM_Evaluation_Report_RPope_24032017.pdf aj670_tau_ch4_fixed.pdf	aero_eval_aj670.pdf	None at present	Run for 20 years - plots based on 11-20th year means; Lightning emissions halved.
TS2000	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/ Gas-phase RF ON	Mohit Dalvi	10.6.1 GA7.1 N96	u-an038	u-am124	ukca_chem_eval_aj670_am124.pdf ukca_haloe_o3_scaling	--	None at present	11-20th year means; GHG and Trace Gas mmrs as per WMOA1+RCP6
TS2000-Nudged	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/ Gas-phase RF ON	Mohit Dalvi	10.6.1 GA7.1 N96	u-an113	u-am400	ukca_chem_eval_am124_am400.pdf 11-20 vs 21-30 yr ukca_chem_eval_am124_20yr_am124_30yr.pdf am400_tau_ch4_fixed.pdf	--	None at present	Plots based on 11-20th year means; Lightning emissions halved.
TS2000-RCP6	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/ Gas-phase RF ON	Mohit Dalvi	10.6.1 GA7.1 N96	NA	u-an114	ukca_chem_eval_am124_an114.pdf an114_tau_ch4_fixed.pdf	--	None at present	Radiation GHG as per GC3.1 UKCA Trace Gas mmrs as per WMOA1+RCP6
TS2000-Rad+UKCA=RCP6	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/ Gas-phase RF ON	Alistair Sellar	10.6.1 GA7.1 N96	NA	u-ao124	ukca_chem_eval_am124_ao124.pdf	--	None at present	Only difference from u-am124 is UKCA Trace Gas read from WMO2011+RCP6 file
TS2000-RCP6 For Next Release Job	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/ Gas-phase RF ON	Mohit Dalvi	10.8 GA7.1 N96	NA	u-ao763	See Developing Releases Table		None at present	Radiation GHG as per GC3.1 UKCA Trace Gas mmrs as per WMOA1+RCP6

Note: The fixed tau CH4 files refer to plots re-generated following a bug-fix to the plotting script. The previous plots/bug only considered CH4 burden in the Troposphere while caclulating the lifetime.

Investigating Low OH, High Methane Lifetime in VN10.5 GA7.0 CheST/StratTrop + GLOMAP simulations

Suite-Id	Owner	UM version	Branches and Configuration Details (apart from CheST+GLOMAP+RADAER+UKCAGHG)	Simulation Length	Plots	CH4 lifetime years Whole Atm vs OH ; ACCMIP=9.3 +/− 0.9	Mean OH molec/cm3 ACCMIP = 1.17(+/−0.1)e+06	Comments
u-ac253	FOC	vn10.3	Lightning NOx 50%, Tropopause height bugfix ukca_ch2br2mmr=1.802e-11, ukca_h2mmr=3.453e-08	20 year, Plots:11-20yr	ac253_OH_Lawrence , ac253_ch4_lifetime	8.63	8.98e+05	Explosive-volc-SO2 emitted, Aero-surf-area=0
u-ad265	MD	vn10.3	Lightning NOx 50%, Tropopause height bugfix, Strat-Hetero aer-surf-area fixes ukca_ch2br2mmr=1.802e-11, ukca_h2mmr=3.453e-08	20 year, Plots:6-10yr	ad265_OH_Lawrence , ad265_ch4_lifetime	9.65	8.0e+05	Expl-volc-SO2 emitted
u-ac961	FOC	vn10.3	Lightning NOx 50%, Tropopause height bugfix, ExplVolc_SO2 Off ukca_ch2br2mmr=1.802e-11, ukca_h2mmr=3.453e-08	20 year, Plots:6-10yr	ac961_OH_Lawrence , ac961_ch4_lifetime	8.8	8.8e+05	Expl-volc-SO2 Off
puma-aa342	MK	vn10.4	Lightning NOx 50%, Tropopause height bugfix, Strat-Hetero aer-surf-area fixes, ExplVolc_SO2 Off ukca_ch2br2mmr=1.0000e-12, ukca_h2mmr=500.0e-09	10 year, Plots:6-10yr	aa342_OH_Lawrence , aa342_ch4_lifetime	13.2	6.22e+05	Expl-volc-SO2 Off
u-ae771	MD	vn10.5	Lightning NOx 50%, Tropopause height bugfix, Strat-Hetero-psc aero-surf-area fixes, ExplVolc_SO2 Off ukca_ch2br2mmr=1.0000e-12, ukca_h2mmr=500.0e-09	20 year, Plots:11-20yr	ae771_OH_Lawrence , ae771_ch4_lifetime ,	14.3	5.73e+05	Expl-volc-SO2 Off ae771_tropchem_evaluation_all
u-af834	MD	vn10.5	Lightning NOx 50%, Tropopause height bugfix, Strat-Hetero-psc aero-surf-area fixes, ExplVolc_SO2 Off ukca_ch2br2mmr=1.802e-11, ukca_h2mmr=3.453e-08	20 year, Plots:11-20yr	af834_OH_Lawrence , af834_ch4_lifetime	9.32	8.31e+05	Expl-volc-SO2 Off af834_tropchem_evaluation_all

Recent results from VN10.2 GA6.0#136.17 (including GLOMAP-mode) + CheST (StratTrop chemistry)

Model Run	Chemistry	Aerosol-microphys	Aerosol-optical	Owner	UM version	Monsoon job ID	Met Office ID	Link to chemistry evaluation	Link to aerosol evaluation	Link to Validation Note	Comments
1	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/Gas-phase RF OFF	Steven Hardiman	10.2	N/A	mi-ah813	ah813.pdf ah813_updated.pdf	None at present	ai985 vs ah813	Run for 20 years - plots based on last 10 years; Biogenic ems prescribed; No trop het chem; Lightning ems 10.7 TgN/yr; CH4 lifetime too short; Strat o3 max reduced and in better agreement with obs; Diagnosed STE flux of O3 clearly wrong. Updated pdf now includes updated methane lifetime calculation and nh_oh/sh_oh ratio.
2	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/O3, N2O, CH44 RF ON	Steven Hardiman	10.2	N/A	mi-ai985	ai985.pdf ai985_updated.pdf	None at present	ai985 vs ah813	Run for 20 years - plots based on last 10 years; Biogenic ems prescribed; No trop het chem; RF bugfix included; Lightning ems 10.7 TgN/yr; CH4 lifetime too short; Strat o3 max reduced and in better agreement with obs; Diagnosed STE flux of O3 clearly wrong. Updated pdf now includes updated methane lifetime calculation and nh_oh/sh_oh ratio.
3	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/O3, N2O, CH4 RF ON	Steven Hardiman	10.2	N/A	mi-aj868	aj868.pdf aj868_updated.pdf	None at present	aj868 vs ai985	RF bugfix included; Lightning emissions halved. Updated pdf now includes updated methane lifetime calculation and nh_oh/sh_oh ratio. Methane lifetime now increased.
4	StratTrop	GLOMAP-mode	RADAER/ACTIVATE/O3, N2O, CH4 RF OFF	João Teixeira	10.2	N/A	mi-ak384	ak384.pdf	None at present	ak384 vs aj868	RF bugfix included; Lightning emissions halved. Updated pdf now includes updated methane lifetime calculation and nh_oh/sh_oh ratio.