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

Harnessing stratospheric diffusion barriers for enhanced climate geoengineering. By N.O. Aksamit et al., in Atmospheric Chemistry and Physics.

Anomalous changes of temperature and ozone QBOs in 2015−2017 from radiosonde observation and MERRA-2 reanalysis. By X. Bai et al., in Earth and Planetary Physics.

Differences in the quasi-biennial oscillation response to stratospheric aerosol modification depending on injection strategy and species. By H. Franke, U. Niemeier, and D. Visioni in Atmospheric Chemistry and Physics.

Persistent model biases in the CMIP6 representation of stratospheric polar vortex variability. By R.J. Hall et al., in the Journal of Geophysical Research: Atmospheres.

Unknown eruption source parameters cause large uncertainty in historical volcanic radiative forcing reconstructions. By L.R. Marshall et al. in the Journal of Geophysical Research: Atmospheres.

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

Tropical Stratospheric Circulation and Ozone Coupled to Pacific Multi-Decadal Variability. By F. Iglesias-Suarez et al., in the Geophysical Research Letters.

Robust asymmetry of the future Arctic polar vortex is driven by tropical Pacific warming. By S. Matsumura, Y. Yamazaki, and T. Horinouchi in the Geophysical Research Letters.

Combined Effects of Global Warming and Ozone Depletion/Recovery on Southern Hemisphere Atmospheric Circulation and Regional Precipitation. By J. Mindlin et al., in the Geophysical Research Letters.

The stratospheric Brewer–Dobson circulation inferred from age of air in the ERA5 reanalysis. By F. Ploeger et al., in Atmospheric Chemistry and Physics.

Interacting tipping elements increase risk of climate domino effects under global warming. By N. Wunderling et al., in Earth System Dynamics.

Discussion papers – open for comment:

Weakening of Antarctic Stratospheric Planetary Wave Activities in Early Austral Spring Since the Early 2000s: A Response to Sea Surface Temperature Trends. By Y. Hu et al., in Atmospheric Chemistry and Physics.

WCRP Climate Research Forum for Europe and Western Asia
on
“Climate research priorities for the next decade”
9 June 2021,
09:00 – 12:30 Central European Summer Time
– Online –

The World Climate Research Programme (WCRP) local organizing committee for the Europe and Western Asia region warmly invites you to the upcoming WCRP Climate Research Forum on “Climate research priorities for the next decade.” 

This Forum will begin with an overview of WCRP from the Chair and Vice Chair of the WCRP Joint Scientific Committee (the scientific steering body of WCRP), Detlef Stammer and Helen Cleugh, followed by presentations highlighting key WCRP Activities, including several of the WCRP Core Projects, the Coupled Model Intercomparison Project (CMIP), the Coordinated Regional Climate Downscaling Experiment (CORDEX), and the WCRP Lighthouse Activities (My Climate Risk, Safe Landing Climates, Explaining and Predicting Earth System Change, and the WCRP Academy).  

This will be followed by two moderated panel discussions: 

Panel 1: Opportunities to broaden WCRP science engagement

Panel 2: Opportunities to strengthen support for WCRP science

This is the fifth in a series of online Climate Research Forums, aimed at exchanging ideas, discussing new activities and opportunities being developed by WCRP, and exploring ways that our climate science community of scientists, partner programs, funders, and end-users can engage towards building “a world that uses sound, relevant, and timely climate science to ensure a more resilient present and sustainable future for humankind.”  

The Forum is without charge and is open to all, but we do ask that you register. 

Further information and details of how to register can be found either in the attached brochure or at: https://www.wcrp-climate.org/crf-events/ewa-june-2021.  

The Forum will be recorded, and the recording will be posted online on the WCRP webpage after the event. 

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

The Influence of Stratospheric Soot and Sulfate Aerosols on the Northern Hemisphere Wintertime Atmospheric Circulation. By J. Coupe and A. Robock in the Journal of Geophysical Research: Atmospheres.

‘Hybrid’ scientific conferences aim to offer the best of in-person and virtual meetings. By K. Langin in Science Careers.

Central role of nitric oxide in ozone production in the upper tropical troposphere over the Atlantic Ocean and western Africa. By I. Tadic et al., in Atmospheric Chemistry and Physics.

The nature of the trend in global and hemispheric temperatures. By U. Triacca and A. Pasini in the International Journal of Climatology.

Discussion papers – open for comment:

Methodology to obtain highly resolved SO2 vertical profiles for representation of volcanic emissions in climate models. By O.S. Sandvik et al., in Atmospheric measurement Techniques.

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

The Arctic polar vortex response to volcanic forcing of different strengths. By A. Azoulay, H. Schmidt, and C. Timmreck in the Journal of Geophysical Research: Atmospheres.

The advective Brewer–Dobson circulation in the ERA5 reanalysis: climatology, variability, and trends. By M. Diallo, M. Ern, and F. Ploeger in Atmospheric Chemistrey and Physics.

Stratospheric gravity waves over the mountainous island of South Georgia: testing a high-resolution dynamical model with 3-D satellite observations and radiosondes. By N.P. Hindley et al., in Atmospheric Chemistry and Physics.

How frequent are Antarctic sudden stratospheric warmings in present and future climate? By M. Jucker, T. Reichler, and D.W. Waugh in the Geophysical Research Letters.

The observed influence of the Quasi-Biennial Oscillation in the lower equatorial stratosphere on the East Asian winter monsoon during early boreal winter. By T. Ma et al., in the International Journal of Climatology.

Is our dynamical understanding of the circulation changes associated with the Antarctic ozone hole sensitive to the choice of reanalysis dataset? By A. Orr et al., in Atmospheric Chemistry and Physics.

Stratospheric contraction caused by increasing greenhouse gases. By P. Pisoft et al., in the Environmental Research Letters.

The impact of increasing stratospheric radiative damping on the quasi-biennial oscillation period. By T. Zhou et al., in Atmospheric Chemistry and Physics.

Discussion papers – open for comment:

Heterogeneity and Chemical Reactivity of the Remote Troposphere defined by Aircraft Measurements. By H. Guo et al., in Atmospheric Chemistry and Physics.

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

Interpol-IAGOS: a new method for assessing long-term chemistry–climate simulations in the UTLS based on IAGOS data, and its application to the MOCAGE CCMI REF-C1SD simulation. By Y. Cohen et al., in Geoscientific Model Development.

Disrupted Stratospheric QBO signatures in the Diurnal Tides over the low‐latitude MLT region. By M. Pramitha et al., in the Geophysical Research Letters.

Eastward‐Propagating Planetary Waves Prior to the January 2009 Sudden Stratospheric Warming. By C.T. Rhodes et al., in the Journal of Geophysical Research: Atmospheres.

How does a Pinatubo‐size Volcanic Cloud Reach the Middle Stratosphere? By G. Stenchikov et al., in the Journal of Geophysical Research: Atmospheres.

Downloadable Information Flyer (pdf)

The World Climate Research Programme (WCRP) leads the way in addressing frontier scientific questions about the coupled climate system — questions that are too large and too complex to be tackled by a single nation, agency, or scientific discipline. For almost 40 years WCRP has coordinated international climate research to advance our understanding of the climate system and how it is affected by human activities. The decades ahead will bring challenges that can only be addressed through a worldwide coordinated effort, involving co-design and stakeholder engagement conducted by a prepared scientific workforce, to support mitigation strategies and adaptation planning. This is one in a series of regional forums, where we will exchange ideas, discuss new activities and opportunities being developed by WCRP, and explore ways that our community of scientists, partner programs, funders, and end-users of our climate science can engage to meet these challenges.

This Forum will begin with an overview of WCRP from the Vice Chair of the WCRP Joint Scientific Committee (the scientific steering body of WCRP) Helen Cleugh, followed by talks highlighting climate science priorities and opportunities for collaboration in the Southeast Asian Region:

• CORDEX-SEA: Providing regional climate change information for enabling adaptations in Southeast Asia, Fredolin Tangang, Professor and Chairperson, Department of Earth Sciences and Environment, the National University of Malaysia and CORDEX-SEA Coordinator.
• Climate science and information priorities and needs – researcher and end user perspectives, Ardhasena Sopaheluwakan, Director, Center for Applied Climate Services, Meteorological, Climatological and Geophysical Agency, Indonesia.
• Climate science as decision-support for resilience: transdisciplinary approaches from local to global, Jessica Dator-Bercilla, University of the Philippines in the Visayas and Asia Climate Change Consortium.
• From science to action: bridging researchers and practitioners, Rodel Lasco, Oscar M. Lopez Center and Philippines Country Coordinator for World Agroforestry (ICRAF).

This will be followed by a moderated question and answer session, with time for discussion. The Forum is without charge and is open to all, but we do ask that you register your interest.

Register here!

We thank the following WCRP Regional Focal Points for organizing this Forum: Fredolin Tangang (National University of Malaysia), Kendra Gotangco Gonzales (Ateneo de Manila University), and Anastasia RTD Kuswardani (Ministry of Marine Affairs and Fisheries, Indonesia). We also thank the WCRP Coordination Office for Regional Activities (CORA) for their support.

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

Teleconnections of the quasi‐biennial oscillation in a multi‐model ensemble of QBO‐resolving models. By J.A. Anstey et al., in the Quarterly Journal of the Royal Meteorological Society.

Analysis of recent lower-stratospheric ozone trends in chemistry climate models. By S. Dietmüller et al., in Atmospheric Chemistry and Physics.

Overview and update of the SPARC Data Initiative: comparison of stratospheric composition measurements from satellite limb sounders. By M.I. Hegglin et al., in Earth System Science Data.

Vertical structure of the Arctic spring transition in the middle atmosphere. By V. Matthias et al., in the Journal of Geophysical Research: Atmospheres.

Measurement report: regional trends of stratospheric ozone evaluated using the MErged GRIdded Dataset of Ozone Profiles (MEGRIDOP). By V. Sofieva et al., in Atmospheric Chemistry and Physics.  

Asymmetry and pathways of inter-hemispheric transport in the upper troposphere and lower stratosphere. By X. Yan et al., in Atmospheric Chemistry and Physics.

It is our pleasure to announce and invite you to the Fourth ACAM Training School on Atmospheric Chemistry and Aerosols in the Asian Monsoon region using Satellite and Model data. 

Application form and school site is available here: https://training.eumetsat.int/enrol/index.php?id=413

Application Deadline: 16th May 2021

Note: you need to register (enrole) to the page

The school is fully on-line and has the goal to enhance the capacity of early career scientists in the areas of atmospheric composition data analysis using satellite remote sensing, model and analysis products. The training school will provide lectures and tutorials on using the latest and comprehensive global datasets on atmospheric composition. Confirmed lecturers include top level scientists and experts from Asia, Europe and US – Sachin Ghude, Laura Pan, Ritesh Gautam, Bhupesh Adhikary, Mark Parrington, Hans Schlager, Ilse Aben.​

The school will have 3 sessions of 2h30 for the weeks from 21 June to  2 July 2021 and is limited to 30 participants to allow a hands-on approach. Priority goes to PhD and master-level students from Asian countries.

Participants will also develop small-scale science projects to apply these datasets in their area of research interests. Junior and advanced researchers working in academy and public/private services as well as candidates from other continents are invited to apply but will be considered based on availability.

A basic knowledge in programming and understanding in structure and formats of geospatial data / Earth Observation data would be advantageous but is NOT mandatory.

We look forward to meet you virtually in June …

Bhupesh Adhikary, Federico Fierli, Ritesh Gautam​ – ACAM Capacity Building Group 

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

Atmospheric Gravity Waves in Aeolus Wind Lidar Observations. By T.P. Banyard et al., in the Geophysical Research Letters.

Dynamical differences between short and long blocks in the Northern Hemisphere. By M. Drouard et al., in the Journal of Geophysical Research: Atmospheres.

The impact of volcanic eruptions of different magnitude on stratospheric water vapor in the tropics. By C.A. Kroll et al. in Atmospheric Chemistry and Physics.

SOUTHTRAC-GW: An Airborne Field Campaign to Explore Gravity Wave Dynamics at the World’s Strongest Hotspot. By M. Rapp et al., in the Bulletin of the American Meteorological Society.

Impacts of teleconnection patterns on South America climate. By M. Simões Reboita et al., in the Annals of the News York Academy of Sciences.