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SPARC eNews Bulletin November 2018.
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SPARC eNews Bulletin November 2018

 News and Announcements

 

The SPARC 6th General Assembly (GA) was held 30 September - 5 October 2018 in the historically important and culturally rich city of Kyoto, Japan. The GA was held back-to-back with the Joint 14th iCACGP Quadrennial Symposium/15th IGAC Science Conference, which took place in Takamatsu, Kagawa, Japan during the previous week. SPARC General Assemblies are opportunities to take stock of what has been achieved in the SPARC project, to identify where gaps in the portfolio of research supported by SPARC need to be filled, and to define where SPARC needs to be moving to remain responsive to the needs of both its members and the users of SPARC research products.

The year-long organization of the GA was thrown into last minute turmoil due to back-to-back landfalling typhoons in Japan during September 2018. Remarkably, the airport and train systems were brought back to normal in under 2 weeks after the first severe typhoon, but then Typhoon Trami passed just to the south of Kyoto on the eve of the GA. Effectively all international and interstate transportation was cancelled on the Sunday before the opening ceremony causing significant travel disruption for many participants. The LOC and SOC decided to adapt the programme to accommodate the disruption, including rescheduling the traditional taiko drumming troupe that provided a spectacular opening to the GA on Monday afternoon.

The conference was attended by 382 participants from 31 countries, 120 of them registered as Early Career Scientists. As for previous GAs, the main presentation format was poster sessions complimented by a handful of oral presentations in plenary. Over 400 posters were presented during the week. Posters were displayed in two sessions each spanning 2.5 days with three science themes covered in each session. The poster sessions were facilitated by refreshments and local sweets kindly arranged by the LOC and gave room for many discussions on the science presented during the oral sessions and poster presentations. An overview will be given in the upcoming SPARC Newsletter No 52, issued in January 2019.

       

(Impressions from the ECS meet & greet event & the GA participants listening to oral presentations in the plenary room. Photo credit: HansVolkert, SPARC office)

 The GA closed with a roundtable discussion on the future of SPARC. It focussed on the priority for the science that SPARC should undertake, rather than a discussion of how WCRP may be organized in the future. The key message from the roundtable was that SPARC science is now needed more than ever and it is a challenge to SPARC to effectively elucidate these scientific challenges in response to the recommendations in the recent WCRP review.




SPARC SSG member Don Wuebbles receives 2018 Bert Bolin Global Environmental Change Award

From The AGU news:

Donald Wuebbles’s research contributions would be notable based solely on his foundational efforts in atmospheric chemistry, including important work on the ozone hole. But his research has been remarkably wide ranging and influential, advancing our knowledge about many key aspects of global environmental change, including severe weather, climate extremes, high-resolution modeling of the climate system, national security, and risk management issues associated with climate change. His leadership of environmental assessments has been extensive at the regional, national, and international levels. For the 2014 Third National Climate Assessment and the 2017 Climate Science Special Report, his singular leadership influence on the development of those products was one of the key reasons for the quality and balance of these influential assessments. His body of work reflects his deep commitment to solving the core environmental challenges of our age.

– Kenneth Kunkel, North Carolina State University, Raleigh

Find Don’s response on the AGU webpage:
https://eos.org/agu-news/wuebbles-receives-2018-bert-bolin-global-environmental-change-Award



CMIP6 analysis workshop – abstract submission now open

“CMIP6 Model Analysis Workshop”
25-28 March 2019,  Barcelona Supercomputing Center (BSC), Barcelona (Spain)

Please go to  https://cmip6workshop19.sciencesconf.org/

The workshop is jointly organized by the WCRP Working Group on Coupled Modelling (WGCM) CMIP Panel and the European Commission Horizon 2020 projects PRIMAVERA (PRocess-based climate sIMulation: AdVances in high-resolution modelling and European climate Risk Assessment) and EUCP (EUropean Climate Prediction system).

Following the format of the WCRP CMIP5 model analysis workshop held in 2012, the workshop focus will be on:

  • Single and multi-model CMIP6 analyses and evaluation that takes advantage of the large suite of CMIP6 experiments
  • Efforts to connect model development and analysis to identify Earth system model improvements that help reduce systematic biases and/or increase the realism of models
  • Methods for multi-model analysis
  • Climate change impacts

The workshop will be structured around these three scientific questions:

  1. How does the Earth system respond to forcing?
  2. What are the origins and consequences of systematic model biases?
  3. How can we assess future climate change given climate variability, predictability and uncertainty in scenarios.

Workshop approach

Short-presentation/poster format

The workshop will consist of a series of seven half-day sessions of three hours each. Each session will begin with 20-25 presenters given a 3 minute time slot to show no more than one slide summarizing the main conclusions of their poster. The rest of the half-day session will consist of viewing posters of that session. In addition, there will be an invited plenary talk each day.

Participation is limited by the size of the venue (~200 people) and format of the workshop.  Abstracts will be accepted based on relevance to the workshop focus.

Timeline

  • Abstract submission opens:                              15 October 2018
  • Abstract submission deadline:                          15 December 2018
  • Abstract / Participation acceptance:                  15 January 2019

Hope to see you in Barcelona next year!

Best wishes,

Scientific Organizing Committee of the Workshop

Veronika Eyring, Greg Flato, Jean-Francois Lamarque, Jerry Meehl, Cath Senior, Ron Stouffer, and Karl Taylor (CMIP Panel)
Francisco J. Doblas-Reyes (EUCP), Malcolm Roberts (PRIMAVERA)




Registration open: CFC-11 Symposium 25-27 March, Vienna, Austria

The purpose of the Symposium is to provide a forum for scientists and technologists to explore  and present information on the potential causes of the increased CFC-11 emissions. This  information will provide a firmer scientific basis for discussions amongst the Parties of the  Montreal Protocol in the coming years. The Symposium is open to discussions on all aspects of  CFC-11 and related compounds, from production to atmospheric loss, along with  environmental impact of the molecule

Topics include, but are not exclusive:
Pathways by which CFC-11 is produced primarily, or inadvertently, along with feedstocks  for that production (e.g., CCl4) and co-produced compounds (e.g., CFC-12).
Feedstock usages of CFC-11
Primary usages of CFC-11, both historical and current
Emission sources for CFC-11 and related compounds, their magnitudes, and timescales  for CFC-11 release.
Analysis of compounds that can be used to trace atmospheric transport of CFC-11
Bottom-up estimates of global and regional CFC-11 emissions
Atmospheric observations, sampling techniques, and analysis of CFC-11 and related  compounds (ground, aircraft, satellite)
Top-down emission estimates of global and regional CFC-11 emissions
Lifetime estimates of CFC-11 and CFC-11 loss processes
Ozone depletion from the increased emissions to date, and projected for the future
Other environmental impact of the increased emissions, including increases of UV and climate.

Registration information:

The Symposium is limited to 100 persons. Hence, attendance will be approved by the Scientific  Steering Committee if applications are oversubscribed. Priorities on attendance will be based upon (a) whether an applicant has submitted an accepted abstract and (b) their technical and scientific interests and standing.
Limited travel funding will be available for attendance, again subject to priorities outlined  above.

Registration will be open until January 2, 2019

More information

Register now 




Call for abstracts to the EGU 2019 General Assembly now open
 

Only 2019 EGU members will be able to submit abstracts as first author to the 2019 meeting and, with a few exceptions outlined below, only one abstract as first author will be permitted.

Find more information on the EGU Webpage

 

Bad Honnef Physics School on Atmospheric Physics: Experiment meets Modelling

Bad Honnef Physics Schools offer young researchers the possibility to deepen their knowledge and skills in advanced and cutting-edge topics in all areas of physics. The Schools address primarily PhD and Master students and they are open for international participation. The one-week Schools take place at the Physikzentrum Bad Honnef (PBH) and are intended for 60 to 90 participating students.

The main goal of the Bad Honnef Physics School on Atmospheric Physics is to overcome the limitation of disciplinary thinking and to provide the attendees with the possibility to obtain scientifically sound and highly relevant information on the most important sub-disciplines of atmospheric physics, presented by internationally recognized experts. The Bad Honnef Physics School will combine expertise of scientists representing theoretical and experimental approaches. On the theoretical side experts on chemical-transport modelling, atmospheric dynamics modelling as well as modelling atmospheric and climate effects of large volcanic eruptions provide insight into their fields.

The target group of the Bad Honnef Physics school on Atmospheric Physics consists of Master & Ph.D. students in atmospheric or environmental physics and related disciplines (e.g. meteorology, atmospheric chemistry, environmental sciences).

The school will take place April 29 – May 3, 2019, at the Physikzentrum Bad Honnef, Germany

Read more

The Application Form


Announcement: Conference “Scenario Forum-2019” 11 - 13 March in Denver

Short-lived climate forcers (SLCFs) – such as aerosols (and their precursors), HFCs, CH₄ and ozone precursors – have received increased attention during the recent years. They can have significant effects on climate change. It is a group of components with very different atmospheric and climate properties than CO₂, mainly related to lifetimes and sign of radiative forcing but also related to different sources and synergies and trade-offs in possible mitigation strategies. Another important characteristic of some SLCFs is that they are subject to relatively large uncertainties in estimates of their climate effects. The role of SLCFs in mitigation scenarios can be important. Firstly, they can have a strong influence on short-term climate change and air quality, and secondly, their contribution to climate change becomes also visible as impact on the calculated remaining carbon budgets for 1.5 and 2ºC global warming. As a result, the future development of SLCFs, their effects and the implications for mitigation strategies are relevant to all the IPCC Working Groups.

In this context, this session welcomes submissions on:
-What is the current understanding of radiative forcing from present day emissions of SLCF and their precursors, and what are the implications for future effects on (mean and extreme) temperatures and precipitation on global and regional scales
-How may the emissions of SLCFs develop in the future. In this context, we would especially be interested in future emissions and mitigation trajectories of SLCFs in relation to the timing of mitigation efforts and the possible trade-offs between CO₂ and non-CO₂ components
-What are the SLCF mitigation options and abatement costs in IAMs and scenarios, and new insights on advanced emission reductions options
-How can modelling of SLCFs be improved in IAMs given scientific developments from various MIPs
-New insights on the co-benefits of reducing SLCFs in scenarios, for instance, on air quality and effects on health and crops

Invited Speakers:

Bill Collins (Univ. of Reading, UK). Tentative title: “On the geophysical knowledge of SLCFs and their role in scenarios.”

Zig Klimont (IIASA, Laxenburg, AT): “Future development of Short-Lived Climate Forcers (SLCFs) and mitigation options”

 

Find meeting webpage




Announcement: Upcoming COSPAR meetings in 2019 and 2020
 
4th Symposium of the Committee on Space Research (COSPAR):  Small Satellites for Sustainable Science and Development

“COSPAR 2019”

Date: 4 – 8 November 2019
Place: Herzliya, Israel
Contact: COSPAR Secretariat cospar@cosparhq.cnes.fr
http://www.cospar2019.org/

Host Organization: The Israel Academy of Sciences and Humanities

Scientific Program Chair: Professor Morris Podolak, Tel Aviv University, Dept. of Geosciences

Abstract Deadline: 15 April 2019

Topics:
– Satellite and nanosatellite observations of ground and underground soil
– Ground water, seas, and oceans
– Atmosphere and ionosphere
– Magnetosphere
– Solar system objects (planets, asteroids, interplanetary space)
– Extrasolar planets and the interstellar medium
– The Milky Way and intergalactic space
– Education for space engineering
– Space sciences

Selected papers published in Advances in Space Research and Life Sciences in Space Research, fully refereed journals with no deadlines open to all submissions in relevant fields.

 

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

“COSPAR 2020”

Date: 15 – 23 August 2020
Place: Sydney, Australia
Contact: COSPAR Secretariat cospar@cosparhq.cnes.fr
https://www.cospar-assembly.org (scientific program)
http://www.cospar2020.org (registration, accommodation, etc.)

Host Organization: Australian Academy of Science

Scientific Program Chair: Prof. Iver Cairns, University of Sydney, School of Physics

Abstract Deadline: mid-February 2020

Topics:

Approximately 125 meetings covering the fields of COSPAR Scientific Commissions (SC) and Panels:
– SC A:  The Earth’s Surface, Meteorology and Climate
– SC B:  The Earth-Moon System, Planets, and Small Bodies of the Solar System
– SC C:  The Upper Atmospheres of the Earth and Planets Including Reference Atmospheres
– SC D:  Space Plasmas in the Solar System, Including Planetary Magnetospheres
– SC E:  Research in Astrophysics from Space
– SC F:  Life Sciences as Related to Space
– SC G:  Materials Sciences in Space
– SC H:  Fundamental Physics in Space
– Panel on Satellite Dynamics (PSD)
– Panel on Scientific Ballooning (PSB)
– Panel on Potentially Environmentally Detrimental Activities in Space (PEDAS)
– Panel on Radiation Belt Environment Modelling (PRBEM)
– Panel on Space Weather (PSW)
– Panel on Planetary Protection (PPP)
– Panel on Capacity Building (PCB)
– Panel on Education (PE)
– Panel on Exploration (PEX)
– Panel on Interstellar Research (PIR)
– Special events:  interdisciplinary lectures, round table, etc.

Selected papers published in Advances in Space Research and Life Sciences in Space Research, fully refereed journals with no deadlines open to all submissions in relevant fields.


 

Vacancy announcement: Coordinator for World Climate Research Programme at the Bjerknes Centre for Climate Research at the Bjerknes Centre for Climate Research (BCCR)

The Bjerknes Centre for Climate Research (BCCR) is currently seeking a senior adviser. The senior adviser will coordinate the newly established office for the World Climate Research Program (WCRP)’s regional activities and will report to the Programme’s Joint Scientific Committee. The office is shared between the Bjerknes Centre and the Climate Service Center Germany (GERICS) in Hamburg, where a corresponding position is being announced. Some travel may be expected.

Responsibilities:

  • Promote and coordinate WCRP’s Core projects and Grand Challenges in line with WCRP Strategic Plan 2019-2028
  • Contribute to synergy and integration between the various regional activities and WCRP’s Core Projects
  • Highlight opportunities, resources, and partnerships that can help promote regional climate research within the WCRP
  • Contribute to the dissemination of WCRP´s activities through brochures and online media
  • Schedule and organize science-specific meetings and courses conducted by WCRP
  • Report on plans and progress at annual meetings
  • Contribute to synergy and integration between WCRP and BCCR

Qualifications and personal qualities:

  • A doctoral degree within the natural sciences related to climate
  • Extensive documented experience in working internationally
  • Documented experience from strategy work and coordination
  • Documented experience from organizing meetings and conferences
  • Fluent in spoken and written English
  • Good communication skills in Norwegian is an advantage
  • Ability to cooperate and other qualities required for the position will be emphasized

We can offer:

  • A good and professionally challenging working environment
  • Salary at pay grade 64 – 70 (code 1364) in the state salary scale. This currently amounts to an annual salary of 565 100 – 631 300 before taxes. Higher salary can be considered for a particularly qualified applicant.
  • Enrolment in the Norwegian Public Service Pension Fund
  • A position in an inclusive workplace (IA enterprise)
  • Good welfare benefits

Detailed information about the position can be obtained by contacting:

Director Tore Furevik, Bjerknes Centre of Climate Research, tore@gfi.uib.no / +47 98677226

The state labour force shall reflect the diversity of Norwegian society to the greatest extent possible. Age and gender balance among employees is therefore a goal. People with immigrant backgrounds and people with disabilities are encouraged to apply for the position. Information about applicants may be made public even if the applicant has asked not to be named on the list of persons who have applied. The applicant must be notified if the request to be omitted is not met. For further information about the recruitment process, click here.
 SPARC publications
New edition of the SPARC newsletter available online:

SPARC, 2018: SPARC Newsletter No. 51, July 2018, 36 pp., available at http://www.sparc-climate.org/publications/newsletter/







 
Journal Special Issues
 

Chemistry-Climate Modelling Initiative - Joint Special Issue in ACP/AMT/ESSD/GMT
The collection already contains 21 published papers. More are accepted and under revision. It is still open for submissions until 30 September 2019.


SPARC Reanalysis Intercomparison Project - Special Issue in ACP
The collection already contains 24 published papers. More are accepted and under revision. It is still open for submissions until 31 December 2019.


Water Vapour Intercomparison II (WAVAS-II) - Joint Special Issue in ACP/AMT/ESSD
The collection already contains 10 published papers. More are accepted and under revision.
The special issue was re-opened, with a new closing deadline on 30 September 2019



Towards Unified Error Repoting (TUNER) - Special Issue in AMT
The collection has recently opened and already contains 3 published papers. It is open for submissions until 31 August 2020.

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.
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

2nd SPARC TUNER Meeting
4 - 7 December 2018
Karlsruhe, Germany
 
CFC-11 Symposium
25 - 27 March, Vienna,
Find meeting webpage

TUNER ISSI International Team Meeting
1 - 5 April 2019
Bern, Schweiz

Find all SPARC meetings

SPARC-related Meetings

AGU 2018 - Sessions of interest:

A14G/A13M: Progress in Reanalysis: Development, Evaluation, and Application
A023: Atmospheric Trace Species in the Stratosphere: Distribution, trends, variability, and processes related to stratospheric ozone and climate
A079 Observations and Modeling of the Upper Troposphere and Lower Stratosphere
A087: Quantifying and reducing the uncertainties in the aerosol forcing of climate
A096: Stratosphere-Troposphere Coupling: Large-Scale Atmospheric Dynamics and Transport
GC11C: Understanding the Effects of Volcanic Eruptions: From Plume Evolution to Climate and Societal Impacts
GC039: Ensemble Modeling Approaches to Studying the Earth System Response to Anthropogenic Forcing
GC058: How Can Global Change Research Inform National Security Decision-Making?
IN014: Climate Informatics: Methods and Applications

AMS Middle Atmosphere
6 - 10 January 2019, Phoenix, AZ, USA
Find meeting webpage

CMIP6 workshop and WGCM session
25 – 29 March 2019
BSC, Barcelona, Spain (map)
Find meeting webpage

GEWEX SSG31 (by Invitation only)
25 Feb – 1 Mar 2019
WMO, 7bis, avenue de la Paix, CP No. 2300, CH-1211 Geneva 2, Switzerland (map)

 
Find more SPARC-related meetings
Find more meetings organised by the WCRP community
Science updates

A selection of new science articles from the past week of interest to the SPARC community (a SPARC Office choice).
 

The Role of Hadley Circulation and Lapse-Rate Changes for the Future European Summer Climate. By R. Brogli et al. in the Journal of the Climate.

SO2 observations and sources in the western Pacific tropical tropopause region. By A.W. Rollins et al. in the Journal of Geophysical Research: Atmospheres.

Towards data‐driven weather and climate forecasting: Approximating a simple general circulation model with deep learning. By S. Scher in the Geophysical Research Letters.

Why does deep convection have different sensitivities to temperature perturbations in the lower and upper troposphere? By Y. Tian and Z. Kuang in the Journal of the Atmospheric Sciences.

Initial report on polar mesospheric cloud observations by Himawari-8. By T.T. Tsuda et al. in Atmospheric Measurement Techniques.

Data assimilation strategies for state dependent observation error variances. By C.H. Bishop in the Quarterly Journal of the Royal Meteorological Society.

Heterogeneity of scaling of the observed global temperature data. By S. Blesić, D. Zanchettin, and A. Rubino in the Journal of the Climate.

The role of the nonlinearity of the Stefan-Boltzmann law on the structure of radiatively forced temperature change. By M. Henry and T.M. Merlis in the Journal of the Climate.

Mean precipitation change from a deepening troposphere. By N. Jeevanjee and D.M. Romps in the Proceedings of the National Academy of Sciences of the United States of America.

Characteristics of Atmospheric Wave‐Induced Laminae Observed by Ozonesondes at the Southern Tip of South America. By H. Ohyama et al. in the Journal of Geophysical Research: Atmospheres.

Inertia‐Gravity Waves Revealed in Radiosonde Data at Jang Bogo Station, Antarctica (74°37’S, 164°13’E). Part I: Characteristics, Energy, and Momentum Flux. By J.-H. Yoo et al. in the Journal of Geophysical Research: Atmospheres.

Science directions in a post‐COP21‐world of transient climate change: enabling regional to local predictions in support of reliable climate information. By D. Stammer et al. in Earth’s Future.

On the momentum budget of the quasi-biennial oscillation in the Whole Atmosphere Community Climate Model. By R.R. Garcia and J.H. Richter in the Journal of the Atmospheric Sciences.

East Asian climate under global warming: understanding and projection. By J. Li et al. in Climate Dynamics.

A robust constraint on the temperature and height of the extratropical tropopause. By D.W.J. Thompson, P. Ceppi, and Y. Li in the Journal of the Climate.

Stratospheric tropospheric wind profiling radars in the Australian network. By B.K. Dolman, I.M. Reid and C. Tingwell in Earth, Planets and Space.

Widespread polar stratospheric ice clouds in the 2015–2016 Arctic winter – implications for ice nucleation. By C. Voigt et al. in Atmospheric Chemistry and Physics.

Mesoscale fine structure of a tropopause fold over mountains. By W. Woiwode et al. in Atmospheric Chemistry and Physics.

Stratospheric aerosols, polar stratospheric clouds and polar ozone depletion after the Mt. Calbuco eruption in 2015. By Y. Zhu et al. in the Journal of Geophysical Research: Atmospheres.

Improving Background-Error Covariances in a 3D Ensemble-Variational Data Assimilation System for Regional NWP. By J-F. Caron et al. in the Monthly Weather Review.

The mechanisms leading to a stratospheric hydration by overshooting convection. By T. Dauhut et al. in the Journal of the Atmospheric Sciences.

The MIPAS/Envisat climatology (2002–2012) of polar stratospheric cloud volume density profiles. By M. Höpfner et al. in Atmospheric Measurement Techniques.

Shape of Atlantic Tropical Cyclone Tracks and the Indian Monsoon. By P. Kelly et al. in the Geophysical Research Letters.

On the Seasonal Evolution and Impacts of Stratosphere‐Troposphere Coupling in the Southern Hemisphere. By E.-P. Lim, H.H. Handon, and D.W.J. Thompson in the Journal of Geophysical Research: Atmospheres.

Verification of an approximate thermodynamic equation with application to study on Arctic stratospheric temperature changes. By R. Liu and Y. Fu in the Journal of the Atmospheric Sciences.

Role of Finite-Amplitude Eddies and Mixing in the Life Cycle of Stratospheric Sudden Warmings. By S.W. Lubis, C.S.Y. Huang, and N. Nakamura in the Journal of the Atmospheric Sciences.

Radiosondes show that after decades of cooling the lower stratosphere is now warming. By R. Philipona et al. in the Journal of Geophysical Research: Atmospheres.

Volcanic radiative forcing from 1979 to 2015. By A. Schmidt et al. in the Journal of Geophysical Research: Atmospheres.

A Tropical Stochastic Skeleton Model for the MJO, El Niño, and Dynamic Walker Circulation: A Simplified GCM. By S. Thual, A.J. Majda, and N. Chen in the Journal of the Climate.

Mesoscale circulations and organized convection in African Easterly Waves. By L. Tomassini in the Journal of the Atmospheric Sciences.

Continued Emissions of the Ozone‐Depleting Substance Carbon Tetrachloride From Eastern Asia. By M.F. Lunt et al. in the Geophysical Research Letters.

Zonal-mean data set of global atmospheric reanalyses on pressure levels. By P. Martineau et al. in Earth System Science Data.

Evidence for Changes in Arctic Cloud Phase Due to Long‐Range Pollution Transport. By Q. Coopman et al. in the Geophysical Research Letters.

A numerical study of gravity wave propagation characteristics in the stratospheric thermal duct. By W. Dong et al. in the Journal of Geophysical Research: Atmospheres.

Duration and decay of Arctic stratospheric vortex events in the ECMWF seasonal forecast model. By Y.J.Orsolini, K. Nishii, and H. Nakamura in the Quarterly Journal of the Royal Meteorological Society.

The key role of ozone depleting substances in weakening the Walker circulation in the second half of the 20th century. By L.M. Polvani and K. Bellomo in the Journal of the Climate.

Sensitivity of the surface orographic gravity wave drag to vertical wind shear over Antarctica. By H.V. Turner et al. in the Quarterly Journal of the Royal Meteorological Society.

The Downward Influence of Sudden Stratospheric Warmings: Association with Tropospheric Precursors. By Ian White et al. in the Journal of the Climate.

Comparison of mean age of air in five reanalyses using the BASCOE transport model. By S. Chabrillat et al. in Atmospheric Chemistry and Physics.

Reconciling Hadley Cell Expansion Trend Estimates in Reanalyses. By N.A. Davis and S.M. Davis in the Geophysical Research Letters.

Wintertime transport of reactive trace gases from East Asia into the deep tropics. By V. Donets et al. in the Journal of Geophysical Research: Atmospheres.

Anomalous Behaviour of Vertical Wavenumber Spectra over a Tropical Station of India. By P. Ghosh, T.K. Ramkumar, and S. Sharma in the Geophysical Research Letters.

A new scenario resource for integrated 1.5 °C research. By D. Huppmann et al. in Nature: Climate Change.

Using machine learning to build temperature-based ozone parameterizations for climate sensitivity simulations. By P. Nowack et al. in the Environmental Research Letters.

The importance of stratospheric initial conditions for winter North Atlantic Oscillation predictability and implications for the signal‐to‐noise paradox. By C.H. O’Reilly et al. in the Quarterly Journal of the Royal Meteorological Society.

Lapse Rate or Cold Point: The Tropical Tropopause Identified by In Situ Trace Gas Measurements. By L.L. Pan et al. in the Geophysical Research Letters.

Scientific Writing: The Predicament of Weather and Climate Scientists in India. By A.S.D. Rajput in the Bulletin of the American Meteorological Society.

Variability in Atmospheric Methane From Fossil Fuel and Microbial Sources Over the Last Three Decades. By R.L. Thompson et al. in the Geophysical Research Letters.

Distinguishing trends and shifts from memory in climate data. By C. Beaulieu and R. Killick in the Journal of the Climate.

Wireless Frequency Sharing May Impede Weather Satellite Signals. By J. Gerth in EOS.

On the Upward Extension of the Polar Vortices Into the Mesosphere. B V.L. Harvey et al. in the Journal of Geophysical Research: Atmospheres.

The role of synoptic‐scale waves in the onset of the South China Sea summer monsoon. By J. Huangfu et al. in the Atmospheric Science Letters.

Atmospheric Kelvin–Helmholtz billows captured by the MU radar, lidars and a fish-eye camera. By H. Luce et al. in Earth, Planets and Space.

Convectively Generated Gravity Waves in High Resolution Models of Tropical Dynamics. By S.K. Müller et al. in the Journal of Advances in Modeling Earth Systems.

Stratosphere Perturbed by the 2011 Mw9.0 Tohoku Earthquake. By X. Yan et al. in the Geophysical Research Letters.

North American Weather Regimes Are Becoming More Persistent: Is Arctic Amplification a Factor? By J.A. Francis, N. Skific, and S.J. Vavrus in the Geophysical Research Letters.

Gravitational separation of the stratospheric air over Syowa, Antarctica and its connection with meteorological fields. By S. Ishidoya et al. in the Atmospheric Science Letters.

Momentum Flux of Convective Gravity Waves Derived from an Offline Gravity Wave Parameterization. Part II: Impacts on the Quasi-Biennial Oscillation. By M.-J. Kang et al. in the Journal of the Atmospheric Sciences.

Prediction of the Madden-Julian Oscillation: A Review. By H. Kim, F. Vitart and D.E. Waliser in the Journal of the Climate.

The circulation response to resolved versus parametrized orographic drag over complex mountain terrains. By A. van Niekerk, I. Sandu, and S. Vosper in the Journal of Advances in Modeling Earth Systems.

Large Midlatitude Stratospheric Temperature Variability Caused by Inertial Instability: A Potential Source of Bias for Gravity Wave Climatologies. By M. Rapp, A. Dörnbrack and P. Preusse in the Geophysical Research Letters.

Effect of upper- and lower-level baroclinicity on the persistence of the leading mode of midlatitude jet variability. By L. Robert, G. Rivière and F. Codron in the Journal of the Atmospheric Sciences.

Dynamics and predictability of the El Niño-Southern Oscillation: An Australian perspective on progress and challenges. By A. Santoso et al. in the Bulletin of the American Meteorological Society.

Comparison of Subseasonal‐to‐Seasonal Model Forecasts for Major Stratospheric Sudden Warmings. By M. Taguchi in the Journal of Geophysical Research: Atmospheres.

How well do stratospheric reanalyses reproduce high-resolution satellite temperature measurements? By C.J. Wright and N.P. Hindley in Atmospheric Chemistry and Physics.

Full Access On the Choice of Momentum Control Variables and Covariance Modeling for Mesoscale Data Assimilation. By Q. Xu in the Journal of the Atmospheric Sciences.

Revisiting ozone measurements as an indicator of tropical width. By S.M. Davis, B. Hassler, and K.H. Rosenlof in Progress in Earth and Planetary Science.

Evidence for Radiative‐Convective Bistability in Tropical Atmospheres. By M. Dewey, C. Goldblatt in the Geophysical Research Letters.

A Parameterization of Turbulent‐Scale and Mesoscale Orographic Drag in a Global Atmospheric Model. By M-S. Koo, H.-J. Choi, and J.-Y. Han in the Journal of Geophysical Research: Atmospheres.

Striking stationarity of large-scale climate model bias patterns under strong climate change. By G. Krinner and M.G. Flanner in the Proceedings of the National Academy of Sciences of the United States of America.

The Global Historical Climatology Network Monthly Temperature Dataset, Version 4. By M.J. Menne et al. in the Journal of the Climate.

Role of Finite-Amplitude Eddies and Mixing in the Life Cycle of Stratospheric Sudden Warmings. By S.L. Lubis, C.S.Y. Huang, and N. Nakamura in the Journal of the Atmospheric Sciences.

Recent Southern Ocean warming and freshening driven by greenhouse gas emissions and ozone depletion. By N.C. Swart et al. in Nature Geoscience.

The Influences of the Arctic Troposphere on the Midlatitude Climate Variability and the Recent Eurasian Cooling. By K. Ye, T. Jung, and T. Semmler in the Journal of Geophysical Research: Atmospheres.

Subseasonal prediction of wintertime East Asian temperature based on atmospheric teleconnections. By C. Yoo et al. in the Journal of the Climate.

How Earth-observation scientists are weathering budget cuts and political scepticism. By K.J. Kent in Nature.

State of the Climate in 2017. By G. Hatfield, J. Blunden, and D.S. Arndt in the Bulletin of the American Meteorological Society.

A Look at 2017: Takeaway Points from the State of the Climate Supplement. By G. Hatfield, J. Blunden, and D.S. Arndt in the Bulletin of the American Meteorological Society.

Practical ensemble-based approaches to estimate atmospheric background-error covariances for limited-area deterministic data assimilation. By J. Bédard et al. in the Monthly Weather Review.

Combined Influence of the Arctic Oscillation and the Scandinavia Pattern on Spring Surface Air Temperature Variations Over Eurasia. By S. Chen et al. in the Journal of Geophysical Research: Atmospheres.

Comparison of methods for extracting annual cycle with changing amplitude in climate series. By Q. Deng and Z. Fu in Climate Dynamics.

On the time evolution of climate sensitivity and future warming. By P. Goodwin in Earth’s Future.

Interannual oscillations and sudden shifts in observed and modeled climate. By S.V. Henriksson in the Atmospheric Science Letters.

Impact of cold surges on the Madden‐Julian oscillation propagation over the Maritime Continent. By B. Pang, R. Lu, and J. Ling in the Atmospheric Science Letters.

The North Atlantic Waveguide and Downstream Impact Experiment. By A. Schäfler et al. in the Bulletin of the American Meteorological Society.

The North African coastal low level wind jet: a high resolution view. By P.M.M. Soares et al. in Climate Dynamics.

Gravity waves excited during a minor sudden stratospheric warming. By A. Dörnbrack et al. in Atmospheric Chemistry and Physics.

Better Data for Modeling the Sun’s Influence on Climate. By T. Dudok de Wit et al. in Earth and Space Science News.

SO2 Oxidation Kinetics Leave a Consistent Isotopic Imprint on Volcanic Ice Core Sulfate. By E. Gautier et al. in the Journal of Geophysical Research: Atmospheres.

On the Upward Extension of the Polar Vortices into the Mesosphere. By V.L. Harvey et al. in the Journal of Geophysical Research: Atmospheres.

Social science perspectives on drivers of and responses to global climate change. By A.K. Jorgenson et al. in Wiley Interdisciplinary Reviews (WIREs) Climate Change.

Evaluating the MJO prediction skill from different configurations of NCEP GEFS extended forecast. By W. Li et al. in Climate Dynamics.

Interdecadal Weakening of the East Asian Winter Monsoon in the mid-1980s: The Roles of External Forcings. By J. Miao et al. in the Journal of the Climate.

Impact of a Stochastic Nonorographic Gravity Wave Parameterization on the Stratospheric Dynamics of a General Circulation Model. By F. Serva et al. in the Journal of Advances in Modeling Earth Systems.

MJO Affects the Monsoon Onset Timing over the Indian Region. By S. Taraphdar et al. in the Geophysical Research Letters.

Ozonesonde Quality Assurance: The JOSIE-SHADOZ (2017) Experience. By A.M. Thompson et al. in the Bulletin of the American Meteorological Society.

 

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