Three-Dimensional Chemical Transport Model Studies of Arctic Ozone Depletion Wuhu Feng and Martyn Chipperfield School of the Earth and Environment, University.

Slides:

Advertisements

Similar presentations

Arctic ozone loss 2011 John Pyle Scientific Assessment Panel National Centre for Atmospheric Science, UK & Centre for Atmospheric Science Department of.

Advertisements

Climate change in the Antarctic. Turner et al, Significant warming of the Antarctic Winter Troposphere. Science, vol 311, pp Radiosonde.

Requirements for monitoring the global tropopause Bill Randel Atmospheric Chemistry Division NCAR.

CO budget and variability over the U.S. using the WRF-Chem regional model Anne Boynard, Gabriele Pfister, David Edwards National Center for Atmospheric.

Quantitative retrievals of NO 2 from GOME Lara Gunn 1, Martyn Chipperfield 1, Richard Siddans 2 and Brian Kerridge 2 School of Earth and Environment Institute.

Institute for Climate and Atmospheric Science SCHOOL OF EARTH AND ENVIRONMENT 3D SLIMCAT Studies of Arctic Ozone Loss Wuhu Feng Acknowledgments: Martyn.

Assimilation of TES O 3 data in GEOS-Chem Mark Parrington, Dylan Jones, Dave MacKenzie University of Toronto Kevin Bowman Jet Propulsion Laboratory California.

Using global models and chemical observations to diagnose eddy diffusion.

Data assimilation of trace gases in a regional chemical transport model: the impact on model forecasts E. Emili 1, O. Pannekoucke 1,2, E. Jaumouillé 2,

Chemistry and Transport in the Lower Stratosphere Wuhu Feng 1, Martyn Chipperfield 1, Howard Roscoe 2 1. Institute for Atmospheric Science, School of the.

Diagnosis of the Ozone Budget in the SH Lower Stratosphere Wuhu Feng and Martyn Chipperfield School of the Environment, University of Leeds, Leeds, UK,

Polar Stratospheric Clouds -Properties and Climate Impacts Haibin Li.

Stratospheric NO y Studies with the SLIMCAT 3D CTM Wuhu Feng, Stewart Davies, Jeff Evans and Martyn Chipperfield School of the Environment, University.

3D CTM Study of Arctic Ozone Loss and Denitrification Effect  Arctic ozone loss for 13 winters  DLAPSE Coupled to SLIMCAT  Denitrification effect on.

3D CTM Study of Arctic Ozone Loss and Denitrification Effect Wuhu Feng 1, Martyn Chipperfield 1, Stewart Davies 1, V.L. Harvey 2, C.E. Randall 2 1. School.

. Sensitivity Studies of Ozone Depletion with a 3D CTM Wuhu Feng 1, M.P. Chipperfield 1, S. Dhomse 1, L. Gunn 1, S. Davies 1, B. Monge-Sanz 1, V.L. Harvey.

Wuhu Feng and Martyn Chipperfield

Larger Chemical Ozone Loss in 2004/2005 Arctic Winter/Spring Wuhu Feng and Martyn Chipperfield School of Earth and Environment, University of Leeds Acknowledgments.

National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory Princeton, NJ Evolution of Stratospheric.

Introduction. A major focus of SCOUT-O3 is the tropics and a key issue here is testing how well existing global 3D models perform in this region. This.

 2003 Antarctic Match campaign June-Oct 2003 nine Ozonesonde stations Measure Chemical O 3 loss rate  SLIMCAT 3D CTM  Ozone and loss rate comparison.

STRATOSPHERIC CHEMISTRY. TOPICS FOR TODAY 1.Review of stratospheric chemistry 2.Recent trends in stratospheric ozone and forcing 3.How will stratospheric.

Institute for Atmospheric Science SCHOOL OF EARTH AND ENVIRONMENT Comparison of Measurements from the SCOUT-O3 Darwin and AMMA Campaigns with a 3-D Chemical.

Studies of Stratospheric NO y Chemistry with Three- Dimensional Chemical Transport Model Wuhu Feng 1, Martyn Chipperfield 1, Stewart Davies 1, B. Sen 2,

CHAPMAN MECHANISM FOR STRATOSPHERIC OZONE (1930) O O 3 O2O2 slow fast Odd oxygen family [O x ] = [O 3 ] + [O] R2 R3 R4 R1.

Meto 637 Lesson 11. The Ozone Hole Antarctic total ozone.

National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory Princeton, NJ Evolution of Stratospheric.

Effect of Stratospheric Water Vapor Change on Ozone Layer and Climate Wenshou Tian Martyn P. Chipperfield 1 Collage of the Atmospheric Science Lanzhou.

Influence of the sun variability and other natural and anthropogenic forcings on the climate with a global climate chemistry model Martin Schraner Polyproject.

Dynamical control of ozone transport and chemistry from satellite observations and CCMs Mark Weber 1, Ingo Wohltmann 2, Veronika Eyring 3, Markus Rex 2,

Sensitivity of Methane Lifetime to Sulfate Geoengineering: Results from the Geoengineering Model Intercomparison Project (GeoMIP) Giovanni Pitari V. Aquila,

Chemical Box Models Markus Rex Alfred Wegener Institute Potsdam Germany (1) Basic concepts, simplified systems (Sunday) (2) The O x, NO y /NO x, HO x,

IV. Ozone Hole Observations Heterogeneous chemistry Decadal ozone loss.

Satellite Observations and Simulations of Subvortex Processing and Related Upper Troposphere / Lower Stratosphere Transport M.L. Santee, G.L. Manney, W.G.

Water and Methane in the Upper Troposphere and Stratosphere based on ACE-FTS Measurements Acknowledgements: The Canadian Space Agency (CSA) is the primary.

Analysis of a simulation with prognostic ozone in ARPEGE-Climat Jean-François Royer, Hubert Teysseidre, Hervé Douville, Sophie Tyteca Meteo-France,

Vertical Structure of the Tropical Troposphere (including the TTL) Ian Folkins Department of Physics and Atmospheric Science Dalhousie University.

Earth&Atmospheric Sciences, Georgia Tech Modeling the impacts of convective transport and lightning NOx production over North America: Dependence on cumulus.

March total ozone from GOME/SCIAMACHY –High inter-annual ozone variability during winter/spring NH –Combined effect from ozone transport and polar ozone.

Lesson 01 Atmospheric Structure n Composition, Extent & Vertical Division.

Non-hydrostatic Numerical Model Study on Tropical Mesoscale System During SCOUT DARWIN Campaign Wuhu Feng 1 and M.P. Chipperfield 1 IAS, School of Earth.

Seasonal variability of UTLS hydrocarbons observed from ACE and comparisons with WACCM Mijeong Park, William J. Randel, Louisa K. Emmons, and Douglas E.

Antarctic Climate Response to Ozone Depletion in a Fine Resolution Ocean Climate Mode by Cecilia Bitz 1 and Lorenzo Polvani 2 1 Atmospheric Sciences, University.

The effect of pyro-convective fires on the global troposphere: comparison of TOMCAT modelled fields with observations from ICARTT Sarah Monks Outline:

Stratosphere and Troposphere Exchange (STE) Above the Tibetan Plateau Wenshou Tian, Min Zhang, Hongying Tian Lanzhou University, Lanzhou, China Martyn.

The impact of volcanic aerosols on stratospheric chemistry with implications for geoengineering Simone Tilmes WACCM team, Doug Kinnison,

10-11 October 2006HYMN kick-off TM3/4/5 Modeling at KNMI HYMN Hydrogen, Methane and Nitrous oxide: Trend variability, budgets and interactions with the.

Dynamical Influence on Inter-annual and Decadal Ozone Change Sandip Dhomse, Mark Weber,

Improved understanding of global tropospheric ozone integrating recent model developments Lu Hu With Daniel Jacob, Xiong Liu, Patrick.

Impact of solar UV variability on sudden stratospheric warming with LMDz-Reprobus A. Hauchecorne 1, S. Bekki 1, M. Marchand 1, C. Claud 2, P. Keckhut 1,

UTLS Chemical Structure, ExTL Summary of the talks –Data sets –Coordinates –Thickness of the ExTL (tracers based) Outstanding questions Discussion.

Development and Applications of the TOMCAT/SLIMCAT 3-D CTM Wuhu Feng and Martyn Chipperfield NCAS, School of Earth and Environment, University of Leeds,

Trends in lower stratosphere Jean-François Lamarque (NCAR and NOAA) and Susan Solomon (NOAA)

slide 1 Polar Ozone: Past and present Chapter 4 of WMO 2006 Ozone Assessment Summary Part 1 Polar stratospheric observations update Part 2 Progress.

2020 vision: Modelling the near future tropospheric composition David Stevenson Institute of Atmospheric and Environmental Science School of GeoSciences.

Dynamical control of ozone transport and chemistry from satellite observations and coupled chemistry climate models Mark Weber 1, Sandip Dhomse 1, Ingo.

MOCA møte Oslo/Kjeller Stig B. Dalsøren Reproducing methane distribution over the last decades with Oslo CTM3.

TTL workshop, Honolulu, October 17, 2012 The role of Stratospheric Aerosol and Ozone in Climate – AerOClim – Stratospheric and upper tropospheric processes.

Proposal Science Issues How will ozone recover over the next few decades in a changing climate? How has past ozone change affected the changing climate.

Ozone loss in the Arctic in winter 2015/2016

Controls on the Past and Future Depletion of Antarctic Ozone and the Emergence of Healing Susan Solomon Richards Professor of Atmospheric Chemistry and.

Yuqiang Zhang1, Owen R, Cooper2,3, J. Jason West1

Evaluation of TM5 performance for assimilation purpose

Twenty-two years of Arctic ozone depletion observations and simulations. Is there a trend ? F. Goutail, F. Lefèvre, A. Pazmiño, J. P. Pommereau, LATMOS/IPSL/UVSQ.

Updates on Solar Signal in the Stratospheric Ozone using a 3D CTM and SAGE v7.0 data Sandip Dhomse, Martyn Chipperfiield, Wuhu Feng, Ryan Hossaini, Graham.

Seasonal Differences of UTLS Exchange Processes between Spring and Summer in the Subtropics and Polar Region Simone Tilmes, Laura Pan, Louisa Emmons, Hans.

Interannual variability of transport via the Asian Summer Monsoon

VINTERSOL Validation of International Satellites and study of Ozone Loss N.R.P. Harris and the VINTERSOL core group.

Simulations of the transport of idealized short-lived tracers

Can the increase of Polar Stratospheric Clouds explain the Antarctic Winter Tropospheric warming? Tom Lachlan-Cope (W. M. Connolley, J. Turner, H. Roscoe,

Presentation transcript:

Three-Dimensional Chemical Transport Model Studies of Arctic Ozone Depletion Wuhu Feng and Martyn Chipperfield School of the Earth and Environment, University of Leeds Acknowledgments S. Davies, B. Sen, G. Toon, J.F. Blavier, C.R. Webster, C.M. Volk, A. Ulanovsky, F. Ravegnani, P. von der Gathen, H. Jost, E.C. Richard, H. Claude NERC, EU TOPOZ III, QUILT, QUOBI projects Model description Recent improvements to SLIMCAT 3D CTM Results Comparisons of new/old CTM for Arctic winter 2002/3 Improved decadal simulations of Arctic O 3 loss (Rex plot) Conclusions

Aim of the work 1: Quantify and understand the degree of chemical ozone loss Aim of the work 2: Improve the Chemical Transport Model (e.g. Rex plot) Measurements: colored squares Old SLIMCAT: black points Rex et al. (GRL,2004) ARCTIC OZONE LOSS

Off-line chemical transport model [e.g. Chipperfield, JGR, 1999] Extends to surface using hybrid  -  levels (SLIMCAT version). Variable horizontal/vertical resolution. Horizontal winds and temperatures from analyses (e.g. UKMO, ECMWF (ERA-40 or operational)). Vertical motion from diagnosed heating rates or divergence. Radiation scheme MIDRAD or CCM scheme Tropospheric physics: convection, PBL mixing etc. Chemistry: ‘Full’ stratospheric chemistry scheme (41 species, 160 reactions) with heterogeneous chemistry on liquid/solid aerosols/PSCs and an equilibrium denitrification scheme. NAT-based denitrification scheme included. SLIMCAT/TOMCAT 3D CTM

2002/03 Meteorology PSC extent decreases with height Very Low Temp. in Dec (produces early O 3 loss)

NEW SLIMCAT VS OLD SLIMCAT comparison with MK4 balloon data  Old SLIMCAT model (with lower boundary at 350K) overestimates N 2 O above 20 km. New version of SLIMCAT (which extends to the surface) gives better N 2 O distribution.  Different radiation schemes result in different transport (CCM better). N2ON2O CH 4

2) NEW SLIMCAT VS OLD SLIMCAT comparison with M55 aircraft data New version of SLIMCAT with CCM radiation scheme gives more (better) descent than MIDRAD radiation scheme in the old version of SLIMCAT N2ON2O CH 4

3) NEW SLIMCAT VS OLD SLIMCAT Comparison with O3 sonde data Significant improvements in the new version of SLIMCAT (I.e. better representation of O 3 in the lower stratosphere – better transport and better chemical loss) 425K 460K 495K

OLD SLIMCAT Run NEW SLIMCAT Run 4) NEW SLIMCAT VS OLD SLIMCAT comparison with POAM data Singleton et al., ACP(submitted),2004  Significant improvements in the NEW SLIMCAT when compared with POAM satellite data (daily average in the vortex). 450K

Observations SLIMCAT - OLD SLIMCAT – NEW 7.5 o x 7.5 o New Model: Multiannual Simulations of Polar O 3 Loss  New SLIMCAT reproduces the Rex plot much better

Jan 15 Mar 25 SLIMCAT Obs. Run OLD Profile of O 3 loss looks ok generally, even in warm winters. Model has larger changes near 550K. Model vortex-average does not get very low values of C C C C C W W  40 New SLIMCAT: Vortex Averaged Profiles for O 3 (left) and  O 3 (right)

A lot! Key points for polar O 3 are probably: Updated kinetics (JPL 2002) + faster JCl 2 O 2 (Burkholder et al extended to 450 nm). NAT-based denitrification scheme. Minimum aerosol (H 2 SO 4 ) loading. Better vertical transport (more Cly in lower stratosphere) and no lower boundary near tropopause. ECMWF analyses (ERA40 + operational). Source gas scenarios: + 100pptv short-lived organic Cl, + shift in long-lived organic loading to shorter lived species. What else has changed in model between old and new model?

Importance of model resolution Higher resolution model produces large chemical ozone depletion, which agrees better with observations 1999/ K 460K 495K

2.8 o x 2.8 o 7.5 o x 7.5 o 1999/2000 Cly y (ppbv)NO y (ppbv) More denitrification at 2.8 o x 2.8 o ERA 40 Vortex maintains stronger gradients – more isolated Op Effect of Resolution: New Model

2.8 o x 2.8 o 7.5 o x 7.5 o 99/00 02/03 03/04 ClO x (ClO + 2Cl 2 O 2 ) (ppbv)Ny Alesund (79 o N, 12 o E) ERA40! Effect of Resolution: New Model

Conclusion Updated New SLIMCAT CTM now gives a good simulation of seasonal O 3 column loss (and better January loss rates – not shown here). Significant improvement in modelling of cold winters in mid 1990s – more modelled O 3 loss. Higher resolution (2.8 o ) does increase O 3 loss especially in late winter/spring through maintaining active Cl for longer. Importance of radiation scheme in the model: Different radiation schemes used in the model can result in different transport and polar ozone loss. More sophisticated CCM scheme gives a better simulation than other schemes. Chemical models/modules (based on tested/validated code) within CCMs can be expected to produce reasonable simulations of chemical polar O 3 loss (under conditions so far experienced) – more positive than results of Rex et al (2004)!