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SPARC eNews Bulletin March 2020.
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SPARC eNews Bulletin March 2020

 News and Announcements


 
Watch out for our Special eNews on organising future meetings in mid-April.

As the current pandemic of Covid-19 hits every part of the world, we are all adapting to new ways of structuring our lives and working together. While most have experience in holding video conferences or online meetings, this special situation brings our online work to a new level. In this situation - which in many ways is new to us - we would like to

1. Offer our help. Please don’t hesitate to contact the SPARC office about things you would like assistance with, or want to share with the community.

2. Ask how you are adjusting to this new situation? Especially those who already had to cancel or postpone meetings: Have you set up alternative meetings to discuss urgent matters? What did you try, and how did it work? What is causing problems?

3. How are you staying in touch ? Is there any particular software you like to use? What have you tried that did not work well or had shortcomings, and do you know why?

4. Hear what you think we could do to help your SPARC work.
 
We are looking forward to hearing about your experience – we will do our best to help you keep up your great work. It will be valuable in helping SPARC plan its future activities as we move to an era with reduced carbon footprint.
 
Stay healthy!
The SPARC co-chairs and office team
 
 
SPARC meetings postponed due to COVID-19 pandemic
 
There is a number of SPARC meetings that had to be cancelled or post-poned, due to the current pandemic of Covid-19. We are doing our best to keep the SPARC webpage up-to-date, and ask all meeting organisers to inform the SPARC office of any plans and devolpments, so we can try to coordinate meeting dates and venues.

3rd International Workshop on Stratospheric Sulfur and its Role in Climate (SSiRC)
Leeds , UK
Find meeting website
New dates: TBA (early 2021)
---------------------------

Gravity Wave ISSI Team meeting
Berne, Switzerland
New dates: 19 - 23 October 2020
---------------------------

11th International Workshop on Long-Term Changes and Trends in the Atmosphere (TRENDS 2020)
FMI, Helsinki, Finland
Find meeting website
New dates: TBA (earliest possible dates: September - October 2020)
---------------------------

3rd LOTUS workshop
scheduled dates: 27 - 28 May 2020
FMI, Helsinki, Finland
---------------------------

8th International HEPPA-SOLARIS Meeting
Birkeland Centre for Space Science, Allégaten 55, 5007 Bergen, Norwegen
Find meeting webpage
New dates: June 2021
---------------------------

QBO@60 – Celebrating 60 years of discovery within the tropical stratosphere
Met Office, Exeter, UK
Find meeting website
New dates: TBA


Other postponed meetings previously announced in the SPARC eNews:

Large-scale moisture and organized cloud systems” session in upcoming JpGU-AGU Joint Meeting
Original dates: 24 - 28 May 2020 
The organisers are actively exxamining the possibility of moving to an online format.
Find meeting webpage


3rd confrerence on Climate Change (CCC2020) in Cologne, Germany

Original dates: 28 - 30 April 2020
The 3rd DLR conference on Climate Change (CCC 2020) will be postponed to a new date in April 2021.
Find meeting webpage

 
43rd Scientific Assembly of the Committee on Space Research (COSPAR) and Associated Events

Original dates: 15 – 23 August 2020
New dates: 28 January - 4 February 2021

Place: Sydney, Australia
https://www.cospar-assembly.org (scientific program)
http://www.cospar2020.org (registration, accommodation, etc.)
Contact: COSPAR Secretariat cospar@cosparhq.cnes.fr

 
 
Open Call For Nominations to the 2021 IGAC Scientific Steering Committee

IGAC welcomes nominations and self-nominations to its Scientific Steering Committee (SSC) from the international community. Serving on the IGAC SSC is ideal for well-established mid to senior career scientists. IGAC is currently accepting nominations for the 2021 SSC. For 2021, nominations for scientists working in Africa, Latin America, North America, and East Asia are strongly encouraged. Nominations will be accepted until 17 April 2020. For information about serving on the IGAC SSC, please see The Expectations and Role of IGAC SSC Members.
IGAC accepts both nominations and self-nominations.  Please see below the requirements for each type of nomination.
Requirements to nominate someone to the IGAC SSC:
  • Fill out the IGAC SSC Nomination Form.
  • Upload the nominee's CV and publication list (if not part of the CV).
  • Upload a statement from the nominee on "Why do you want to serve on the IGAC SSC and what will you bring to IGAC?" The statement should be ~300 words or less.
  • Provide in the form a reason for the nomination.
Requirements for self-nomination to the IGAC SSC:
  • Fill out the IGAC SSC Self-Nomination Form.
  • Upload your CV and publication list (if not part of the CV).
  • Upload a letter of support from someone in the international scientific community.
  • Provide a statement on "Why do you want to serve on the IGAC SSC and what will you bring to IGAC?". The statement should be ~300 words or less.
Please keep in mind that IGAC strives to have a SSC with diversity in geographical representation, gender, and expertise. To view current SSC members and their expertise, visit igacproject.org/people

For more information on the role and expectations of SSC members, please feel free to contact the IGAC Executive Officer, Megan L. Melamed (megan@igacproject.org).
 

Joint WCRP and DCMIP Summer School on Earth System Model Development: Dynamical cores and physics-dynamics coupling

Dates: August 10-14. 2020

Location: Mesa Lab, National Center for Atmospheric Research (NCAR), Boulder, CO, USA

The Dynamical Core Model Intercomparison Project (DCMIP) and its joint World Climate Research Programme (WCRP) Summer School highlights the newest modeling techniques for global Earth system models. The overarching theme of this summer school is physics-dynamics coupling.

The objectives of the joint WRCP and DCMIP Summer School are (1) to teach a group of 30 extraordinary multi- disciplinary students and postdocs how today’s and future atmospheric models are or need to be built, and (2) to use idealized test cases to expose selected model design choices in simplified modeling frameworks based on NCAR’s Community Earth System Model (CESM) and the Department of Energy’s (DOE’s) Energy Exascale Earth System Model (E3SM). DCMIP-2020 thereby continues the DCMIP-2008, DCMIP-2012 and DCMIP-2016 model intercomparison and summer school series as well as the 1st and 2nd WCRP summer school series on Climate Model Development.

The application period will open on March/31/2020 and will stay open until May/1/2020. Invitations to the summer school will be sent by mid May 2020.

MORNING SUMMER SCHOOL

Morning lectures from experts in the field on select topics associated with atmospheric model theory, design and development. Topics include:

- Introduction to Earth System Modeling
- Numerical methods
- Computational performance + challenges
- Physics parameterizations
- Diffusion, filters and fixers
- Physics-dynamics coupling
- Invariant conservation
- Tracer transport
- Model verification and validation

AFTERNOON WORKSHOP

Practical hands-on afternoon sessions run by model leads where students will execute and explore the dynamical cores of CESM (for example, NOAA’s FV3 dynamical core and NCAR's version of the spectral-element dynamical core) and E3SM (DOE’s non-hydrostatic spectral-element dynamical core) in a simplified model framework. Test cases include Held-Suarez, aquaplanet, radiative-convective equilibrium, and weather forecast experiments.

FOR MORE INFORMATION

https://www.earthsystemcog.org/projects/dcmip-2020/ or contact dcmip@cgd.ucar.edu

Sponsors include the National Science Foundation (NSF), the U.S. Department of Energy (DOE), the World Climate Research Programme (WCRP), the National Center for Atmospheric Research (NCAR), and the National Oceanic and Atmospheric Administration (NOAA).

Travel support is available for approximately 30 students and postdocs. Registration will open on or about March 31, 2020 and close May 1, 2020. Invitations will be sent out by May 15, 2020.

Organizing Committee:

Peter Lauritzen, NCAR
Adam Herrington, NCAR
Christiane Jablonowski, University of Michigan
Hugh Morrison, NCAR
Kevin Reed, Stony Brook University
Mark Taylor, Sandia National Laboratories
Paul Ullrich, University of California Davis
Colin Zarzycki, Pennsylvania State University
 


Abstract submission open: 2020 Quadriennial Ozone Symposium

The abstract submission to the 2020 Quadriennial Ozone Symposium is now open. Submission is possible through the meeting webpage

The Symposium will take place 4 October – 10 October in Seoul, Korea

QOS 2020 will be an exciting international event for presenting and discussing recent research achievements and developments on ozone and related topics. Recently, a variety of new developments have taken place on all facets of atmospheric ozone, including its observation and impact on human health and ecosystems. Internationally renowned scientists, young scientists, and students will have a unique opportunity to present and discuss scientific issues, exchange ideas and establish collaborations.

Download meeting announcement
Find meeting webpage

Abstract submission guidelines
  • You will need your user account to log on to QOS 2020. Please sign up for a user account at the QOS 2020 log-in page here.
  • Use a text editor of your choice to compile your abstract: title, author(s), and affiliation(s) of the author(s).
  • Please refer to the following file for an abstract template here.
    Your abstract body should contain text only and should have 100–500 words.
  • Submit your abstract. A confirmation message including your abstract number will be displayed, and you will receive a confirmation email providing your abstract number. Should you not receive the abstract submission confirmation email within 24 hours, please check your spam folder first and then contact us at o3symposium2020@gmail.com.
  • You can modify and resubmit your abstract anytime, but it must be before the submission deadline. Under “Abstract Submission/Status”, click “Modify” to access full abstract details.

In case any questions arise, please do not hesitate to contact us at o3symposium2020@gmail.com.

Important dates

Deadline for abstract submission (29 May 2020)
Deadline for Pre-registration (Aug 31st 2020)


Now available: regional climate simulations of the CORDEX CORE activity

Dear SPARC colleagues,

we encourage to take the opportunity for collaborations with our fellow WCRP project CORDEX. Please find below a message from the CORDEX CORE activity. The SPARC office is happy to establish contact.

Dear colleagues,

The regional climate simulations of the CORDEX CORE activity are now available in the ESGF (see, e.g. https://esgf-data.dkrz.de/search/cordex-dkrz/ and look for the XXX-22 domains, for other RegCM simulations not available in ESGF, please find further information on data access in http://users.ictp.it/~jciarlo/).

The simulations cover all major inhabited areas of the world at a resolution of 25km. Two RCMs (RegCM from ICTP and REMO from GERICS) are used to downscale three GCMs at two RCPs (RCP2.6 and RCP8.5).

Purpose of CORDEX CORE

Provide a foundation of high-resolution regional climate model projections to improve the understanding of local fine scale phenomena and to allow ensemble-based vulnerability, impact, adaptation and climate services research world-wide.

CORDEX CORE

… aims to create an initial homogeneous dowscaled ensemble
… aims at covering the major populated areas of the world
… will be extended by further simulations in the regions
… will allow new research:

  • to assess future climate (mean, extremes and hazards, …)
  • to study one phenomena across multiple domains (e.g., monsoons, tropical cyclones)
  • to assess consistency of climate change signals and possible added value (in comparison with coarser resolution)
Method

CORDEX CORE is designed

  • to use a core set of RCMs
  • RegCM and REMO (so far)
  • to downscale a core set of GCMs with high, medium and low Climate Sensitivity
  • HadGEM (backup: MIROC5)
  • MPI-ESM (backup: EC-Earth)
  • NorESM (backup: GFDL-ESM)
  • to have a validation simulation and use different representative concentration pathways
  • ERA-Interim, RCP2.6 and RCP8.5
  • to be incrementally extended with further contributions by additional models/experiments

CORDEX CORE (25km) is extending CORDEX (50km) regional climate information.

Papers / Science

3 main papers coming out from the CORDEX core effort (and are encouraged to be used as further reference)

  • evaluation of mean climate and projections
  • evaluation of extreme climate and projection
  • evaluation of hazard and projections

We encourage the use of CORDEX CORE for any scientific studies by the entire CORDEX  research community.

Data Policy:
we strongly encourage people using the data from the CORDEX-CORE database to contact the model data producers in order to give feedback on the model simulations, interact on the scientific studies and/or propose co-authorships.

Further information can be found here:
http://www.cordex.org/experiment-guidelines/cordex-core/

Please let us know if you have further questions or concerns,

Armelle Remedio, Claas Teichmann and Erika Coppola

 

 
New publication: An Integrated Global Greenhouse Gas Information System (IG3IS) Science Implementation Plan

The Science plan of the Integrated Global Greenhouse Gas Information System (IG3IS) has recently been published as
GAW Report, 245. An Integrated Global Greenhouse Gas Information System (IG3IS) Science Implementation Plan

About IG3IS

The implementation of the Paris agreement will require governments to make efforts to limit atmospheric concentrations of greenhouse gases and to track their progress towards achievement of the climate goal set by the agreement in a transparent way.

To support these efforts, the 17th World Meteorological Congress adopted a resolution on the implementation of IG3IS with the aim to expand the observational capacity for greenhouse gases (GHG), extend it to the regional and urban domains, and develop the information systems and modelling frameworks to provide information about GHG emissions to society. The Executive Council of the Wold Meteorological Organization (WMO) further approved IG3IS Science Implementation Plan at its 70th session in June 2018 and IG3IS is now moving to its implementation phase.

Find out more

 

Announcement of the Bid Solicitation for the 2022 iCACGP and IGAC International Atmospheric Chemistry Conference

iCACGP and IGAC have announced the bid solicitation for the host location and local organizing committee (LOC) for the 2022 International Atmospheric Chemistry Conference is now open!

They recognize the effort it takes for any LOC to organize and run an international conference. In order to focus potential bidders on key issues,  guidelines are provided, based on the integrated experience of overseeing recent iCACGP Symposia/IGAC Science Conferences.  Please refer to these guidelines when preparing your bid.

The deadline for bid submissions is 24 April 2020.

 SPARC publications
New edition of the SPARC newsletter available online:

SPARC, 2020: SPARC Newsletter No. 54, January 2020, 48 pp., available at http://www.sparc-climate.org/publications/newsletter/
SPARC Report No. 9

SPARC/IO3C/GAW Report on Long-term Ozone Trends and Uncertainties in the Stratosphere

edited by the SPARC LOTUS activity team.
Available at: https://www.sparc-climate.org/publications/sparc-reports/sparc-report-no-9/

Book: "Sub-Seasonal to Seasonal Prediction"
Chapter 11 - Sub-seasonal Predictability and the Stratosphere
Journal Special Issues
 

Chemistry-Climate Modelling Initiative - Joint Special Issue in ACP/AMT/ESSD/GMT
The collection already contains 31 published papers. More are accepted and under revision.It is still open for submissions until 3 September 2020


SPARC Reanalysis Intercomparison Project - Special Issue in ACP
The collection already contains 37 published papers. More are accepted and under revision. It is still open for submissions until 31 December 2020 (dadline extended).


Water Vapour Intercomparison II (WAVAS-II) - Joint Special Issue in ACP/AMT/ESSD
The collection already contains 14 published papers. More are accepted and under revision. It is still open for submissions until 31 July 2020 (deadline extended).

Towards Unified Error Repoting (TUNER) - Special Issue in AMT
The collection already contains 5 published papers. It is open for submissions until 31 August 2020.

StratoClim stratospheric and upper tropospheric processes for better climate predictions
The collection already contains 17 published paper. It is open for submissions until 01 March 2021.

Additional collections:

There is an onlince collection within the Quarterly Journal of the Royal Meteorological Society on the QBO Modelling Intercomparison. We suggest groups who want to submit a paper to this Online Collection also contact the QBOi Coordinators (see activity webpage).
Early Career Opportunities
SPARC encourages early career scientists to join the Young Earth System Scientists (YESS) community. YESS unifies early career researchers in an influential network and communication platform to promote local and global exchange across multiple disciplines related to Earth system sciences. Join the YESS community by going to www.yess-community.org

SPARC Meetings
 

11th International Workshop on Long-Term Changes and Trends in the Atmosphere (TRENDS 2020)
scheduled: 25–29 May 2020 - new date TBA
Finnish Meteorological Institute, Erik Palménin aukio 1, 00560 Helsinki, Finnland

3rd LOTUS workshop
27–28 May 2020
Finnish Meteorological Institute, Erik Palménin aukio 1, 00560 Helsinki, Finnland

8th International HEPPA-SOLARIS Meeting
SOLARIS-HEPPA working group meeting
scheduled: 8–12 June 2020 - new date: June 2021
Birkeland Centre for Space Science, Allégaten 55, 5007 Bergen, Norwegen
Find meeting webpage

QBO@60 – Celebrating 60 years of discovery within the tropical stratosphere
scheduled: 06 - 10 July 2020 - new date TBA
UK Met Office, Exeter, UK
Find meeting webpage

Quadrennial Ozone Symposium 2020
04 - 10 October 2020
Yonsei University, Seoul, South Korea
Find meeting webpage

Gravity Waves ISSI Team meeting
19 - 23 October 2020
Berne, Switzerland


Find all SPARC meetings

SPARC-related Meetings
 
EGU General Assembly - Online
4. – 8. Mai 2020
This meeting will be hald in an online format.
Find meeting webpage

Austria Center Vienna, Bruno-Kreisky-Platz 1, 1220 Wien, Österreich

41st WCRP Joint Scientific Committee Session (JSC-41)
18 – 22 May 2020
Online - by invitation only.

2020 ASP Colloquium - The Science of S2S Predictions
20 - 24 July 2020
NCAR, Boulder, USA

WCRP Model Development Summer School
10 – 14 Aug 2020
Mesa Lab, NCAR, Boulder, USA
Find meeting webpage

Find more SPARC-related meetings

Find more meetings organised by the WCRP community
Science updates

A selection of recently published science articles of interest to the SPARC community (since last eNews; a SPARC Office choice).

 

Rare ozone hole opens over Arctic — and it’s big. Nature news article

Decades-old refrigerators and insulation from buildings are leaking ozone-destroying chemicals: nations must act. Editorial, nature.

A pause in Southern Hemisphere circulation trends due to the Montreal Protocol. By A. Banerjee et al. in nature.

International regulations have paused a jet-stream shift in the Southern Hemisphere. By A.Y. Karpechko, in nature news & views.

On the changing role of the stratosphere on the tropospheric ozone budget: 1979‐2010. By P.T. Griffiths et al. in the Geophysical Research Letters.

Breakdown of the Linear Relationship between the Southern Hemisphere Hadley Cell Edge and Jet Latitude Changes in the Last Glacial Maximum. By S.-Y. Kim and S.-W. Son in the Journal of the Climate.

Modeling stratospheric intrusion and trans-Pacific transport on tropospheric ozone using hemispheric CMAQ during April 2010 – Part 1: Model evaluation and air mass characterization for stratosphere–troposphere transport. By S. Itahashi, et al. in Atmospheric Chemistry and Physics.

Response of the Asian summer Monsoons to a high-latitude thermal forcing: mechanisms and nonlinearities. By S. Talento et al. in Climate Dynamics.

The interaction between moist convection and the atmospheric circulation in the tropics. By L. Tomassini in the Bulletin of the American Meteorological Society.

The influence of zonally asymmetric stratospheric ozone changes on the Arctic polar vortex shift. By J. Zhang et al. in the Journal of the Climate.

Local Ensemble Transform Kalman Filter with Cross Validation. By M. Buehner in the Monthly Weather Review.

Synthesis of methane observations across scales: Strategies for deploying a multi‐tiered observing network. By D.H. Cusworth et al. in the Geophysical Research Letters.

Impact of Sub‐Grid Variation of Water Vapor on Longwave Radiation in a General Circulation Model. By S. Kim, S. Park, and J. Shin in the Journal of Advances in Modeling Earth Systems.

The practice of responsible research and innovation in “climate engineering.” By S. Low and J.J. Buck in WIREs Climate Change.

Thermodynamic cycles in the stratosphere. By P. Ruggieri, M.H.P. Ambaum, and J. Nycander in the Journal of the Atmospheric Sciences.

Earth System Model Evaluation Tool (ESMValTool) v2.0 – technical overview. By M. Righi et al. in Geoscientific Model Development.

Spatio‐temporal stability analysis applied to monsoon anticyclone flow. By P.M. Rupp and P.H. Haynes in the Quarterly Journal of the Royal Meteorological Society.

VolKilau: Volcano rapid response balloon campaign during the 2018 Kilauea eruption. By J.-P. Vernier et al. in the Bulletin of the American Meteorological Society

Infrasound and Gravity Waves Over the Andes Observed by a Pressure Sensor on Board a Stratospheric Balloon. G. Poler et al. in the Journal of Geophysical Research: Atmospheres.

Exploring the Need for Reliable Decadal Prediction. Workshop report by S. Sandgathe et al. in the Bulletin of the American Meteorological Society.

Composite synoptic-scale environments conducive to North American polar–subtropical jet superposition events. By A.C. Winters et al. in the Monthly Weather Review.

Seasonal forecasts of the 20th Century. By A. Weisheimer et al. in the Bulletin of the American Meteorological Society.

An Estimate of the Relative Contributions of Sea Surface Temperature Variations in Various Regions to Stratospheric Change. By F. Xie et al. in the Journal of the Climate.

Little influence of Arctic amplification on mid-latitude climate. By A. Dai and M. Song in nature: climate change.

The Structure of Climate Variability Across Scales. By C.L.E. Franzke et al. in the Reviews of Geophysics.

Intensified Investigations of East Asian Aerosols and Climate. By Z. Li in Earth and Space Science News (EOS).

The influence of DACCIWA radiosonde data on the quality of ECMWF analyses and forecasts over southern West Africa. By R. van der Linden et al. in the Quarterly Journal of the Royal Meteorological Society.

Mountain waves produced by a stratified boundary layer flow. Part I: Hydrostatic case. By F. Lott, B. Deremble and C. Soufflet in the Journal of the Atmospheric Sciences.

A regime perspective on the North Atlantic eddy-driven jet response to sudden stratospheric warmings. By A.C. Maycock et al. in the Journal of the Climate.

How Useful is a Linear Ozone Parameterization for Global Climate Modeling? By K. Meraner, S. Rast, and H. Schmidt in the Journal in Advances in Modeling Earth Systems.

Scenarios science needed in UNFCCC periodic review. By C.-F Schleussner and C.L. Fyson in nature climate change.

The Global Teleconnection Signature of the Madden‐Julian Oscillation and its Modulation by the Quasi‐Biennial Oscillation. By B.A. Toms et al. in the Journal of Geophysical Research: Atmospheres.

Comparative assessment of climate engineering scenarios in the presence of parametric uncertainty. By G.T. Tran, A. Oschlies, and D.P. Keller in the Journal of Advances in Modeling Earth Systems.

Uncertainty in the response of sudden stratospheric warmings and stratosphere‐troposphere coupling to quadrupled CO2 concentrations in CMIP6 models. By B. Ayarzagüena et al. in the Journal of Geophysical Research: Atmospheres.

Linking midlatitudes eddy heat flux trends and polar amplification. By R. Chemke and L.M. Polvani in in nature partner journals: Climate and Atmospheric Science.

A comprehensive assessment of tropical stratospheric upwelling in the specified dynamics Community Earth System Model 1.2.2 – Whole Atmosphere Community Climate Model (CESM (WACCM)). By N.A. Davis et al. in Geoscientific Model Development.

On the Role of Rossby Wave Breaking in the Quasi‐Biennial Modulation of the Stratospheric Polar Vortex during Boreal Winter. By H. Lu et al. in the Quarterly Journal of the Royal Meteorological  Society.

Simulation of convective moistening of the extratropical lower stratosphere using a numerical weather prediction model. By Z. Qu et al. in Atmospheric Chemistry and Physics.

Dependence of sudden stratospheric warmings on internal and external drivers. By A. Salminen et al. in the Geophysical Research Letters.

South Asian monsoon response to weakening of Atlantic meridional overturning circulation in a warming climate. By N. Sandeep et al. in Climate Dynamics.

Evaluation of the Quasi‐Biennial Oscillation in global climate models for the SPARC QBO‐initiative. By A.C. Bushell et al. in the Quarterly Journal of the Royal Meteorological Society.

QBO changes in CMIP6 climate projections. By N. Butchart et al. in the Geophysical Research Letters.

First detection of a Brief Mesoscale Elevated Stratopause in very early winter. By M. García-Comas et al. in the Geophysical Research Letters.

The Impact of the Stratosphere on the MJO in a Forecast Model. By Z. Martin et al. in the Journal of Geophysical Research: Atmospheres.

Impact of satellite observations on forecasting sudden stratospheric warmings. By S. Noguchi et al. in the Geophysical Research Letters.

Impact of Quasi-Biennial Oscillation on the northern winter stratospheric polar vortex in CMIP5/6 models. By J. Rao, C.I. Garfinkel, and I.P. White in the Journal of the Climate.

Technical note: Intermittent reduction of the stratospheric ozone over northern Europe caused by a storm in the Atlantic Ocean. By M. Sofiev et al. in Atmospheric Chemistry and Physics.

Seasonality of the MJO impact on upper troposphere/lower stratosphere temperature, circulation and composition. By O.V. Tweedy, L.D. Oman, and D.W. Waugh in the Journal of the Atmospheric Sciences.

 

Little influence of Arctic amplification on mid-latitude climate. By A. Dai and M. Song in nature: climate change.

Effects of missing gravity waves on stratospheric dynamics; part 1: climatology. By R. Eichinger et al. in Climate Dynamics.

Environmental catastrophes, climate change, and attribution. By E.A. Lloyd and T.G. Shepherd in the Annals of the New York Academy of Sciences.

Boreal winter stratospheric variability in EC-EARTH: High-Top versus Low-Top. By F. Palmeiro et al. in Climate Dynamics.

Describing the relationship between a weather event and climate change: a new statistical approach. By A. Ribes, S. Thao, and J. Cattiaux in the Journal of the Climate.

Response of middle atmospheric temperature to the 27 d solar cycle: an analysis of 13 years of microwave limb sounder data. By P. Rong et al. in Atmospheric Chemistry and Physics.

Tropical widening: From global variations to regional impacts. By P.W. Staten et al. in the Bulletin of the American Meteorological Society.

Gravity wave excitation during the coastal transition of an extreme katabatic flow in Antarctica. By É. Vignon et al. in the Journal of the Atmospheric Sciences.

Independent and Joint Influences of Eastern Pacific El Niño–Southern Oscillation and Quasi‐biennial Oscillation on Northern Hemispheric Stratospheric Ozone. By F. Xie et al. in the International Journal of Climatology.

Estimates of regional source contributions to the Asian Tropopause Aerosol Layer using a chemical transport model. By T.D. Fairlie et al. in the Journal of Geophysical Research: Atmospheres.

Convective bursts with gravity waves in tropical cyclones: case study with the Himawari‐8 satellite and idealized numerical study. By T. Horinouchi et al. in the Geophysical Research Letters.

QBO modulation of the MJO‐related precipitation in East Asia. By H. Kim, S.-W. Son, and C. Yoo in the Journal of Geophysical Research: Atmospheres.

Effective resolution in high resolution global atmospheric models for climate studies. By R. Klaver et al. in the Atmospheric Science Letters.

Connections between Stratospheric Ozone Concentrations over the Arctic and Sea Surface Temperatures in the North Pacific. By M. Liu, D. Hu, and F. Zhang in the Journal of Geophysical Research: Atmospheres.

Trends in northern midlatitude atmospheric wave power from 1950 to 2099. By H.S. Sussman et al. in Climate Dynamics.

The dependence of mountain wave reflection on the abruptness of atmospheric profile variations. By M.A.C. Teixeira and J.L. Argaín in the Qarterly Journal of the Royal Meteorological Society.

Towards a reanalysis of stratospheric ozone for trend studies: Assimilation of the Aura Microwave Limb Sounder and Ozone Mapping and Profiler Suite Limb Profiler data. By K. Wargan et al. in the Journal of Geophysical Research: Atmospheres.

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