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

Improvements in Circumpolar Southern Hemisphere Extratropical Atmospheric Circulation in CMIP6 Compared to CMIP. By T.J. Braecegirdle et al. in Earth and Space Science.

The Southern Annular Mode: Variability, trends, and climate impacts across the Southern Hemisphere. By R.L. Fogt and G.J. Marschall in WIREs Climate Change.

An evaluation of tropical waves and wave forcing of the QBO in the QBOi models. By L.A. Holt et al. in the Quarterly Journal of the Royal Meteorological Society.

Stratospheric water vapor feedback disclosed by a locking experiment. By Y. Huang, Y. Wang, and H. Huang in the Geophysical Research Letters.

Stratospheric ozone changes from explosive tropical volcanoes: Modelling and ice core constraints. By A. Ming et al. in the Journal of Geophysical Research: Atmospheres.

Attribution of the record-breaking heat event over Northeast Asia in summer 2018: the role of circulation. By L. Ren, T. Zhou and W.Zhang in the Environmental Research Letters.

Monsoons Climate Change Assessment. By B. Wang et al. in the Bulletin of the American Meteorological Society.

Role of the quasi-biennial oscillation in the downward extension of stratospheric northern annular mode anomalies. By R. Zhang, W. Tian, and T. Wang in Climate Dynamics.

Discussion papers- open for comment:

Characterizing quasi-biweekly variability of the Asian monsoon anticyclone using potential vorticity and large-scale geopotential field. By A. Amemimya and K. Sato in Atmospheric Chemistry and Physics.

Validation of Aeolus wind products above the Atlantic Ocean. By H. Baars et al. in Atmospheric Meatsurement Techniques.

A Global Space-based Stratospheric Aerosol Climatology (Version 2.0): 1979–2018. By M. Kovilakam et al. in Earth System Science Data.

If you haven’t done so, this is a reminder to submit your abstract for the online LOTUS workshop before Thursday 21 May at https://events.spacepole.be/event/81/abstracts

We encourage you to present your recent results or future plans related to the production, intercomparison or regression analysis of long-term O3 data records & simulations.  In order to finalise the agenda we would need a title and a brief abstract of what you would like to share with us during the WebEx session.

We aim at ~15min presentations, but depending on the number of abstracts or topics, the actual time slots may vary in length.

Kind regards,
Daan, Sophie & Irina

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

How mountains stir up a hot spot of turbulence. By E. Hand in Science.

The ERA5 Global Reanalysis. By J. Hersbach et al. in the Quarterly Journal of the Royal Meteorological Society.

The lack of QBO‐MJO connection in CMIP6 models. By J. Kim et al. in the Geophysical Research Letters.

Observational evidence of moistening the lowermost stratosphere via isentropic mixing across the subtropical jet. By J. Langille et al. in Atmospheric Chemistry and Physics.

A Post‐2013 Drop‐off in Total Ozone at a Third of Global Ozonesonde Stations: ECC Instrument Artifacts? By R.M. Stauffer et al. in the Geophysical Research Letters.

First validation of Aeolus wind observations by airborne Doppler wind lidar measurements. By B. Witschas et al. in Atmospheric Chemistry and Physics.

Impacts of Wind Profile Shear and Curvature on the Parameterized Orographic Gravity Wave Stress in the Weather Research and Forecasting Model. By X. Xu et al. in the Quarterly Journal of the Royal Meteorological Society.

Discussion papers – open for comment:

Influence of convection on stratospheric water vapor in the North American Monsoon region. By Wandi Yu et al. in Atmospheric Chemistry and Physics.

Dear Colleagues,

We would like to draw your attention to a new Special Section in Geophysical Research Letters and Journal of Geophysical Research: Atmospheres entitled “The Exceptional Arctic Stratospheric Polar Vortex in 2019/2020: Causes and Consequences”. The call for papers for this Special Section and submission information are given below.

We encourage you to consider submitting a paper for this special issue, and to communicate / coordinate with us and your colleagues regarding your plans. We are expecting both quick short papers for GRL and longer more detailed papers that may take more time to prepare (e.g., involving modeling studies or postseason impacts) for JGR and will thus hold the Special Section open for submissions through calendar year 2021.

Please feel free to contact any or all of us with any inquiries or plans related to this Special Section.

Cheers,
">Gloria Manney,
Amy Butler,
Jens-Uwe Grooß,
Krzysztof Wargan,
(Organizers)

Find the call for papers on the JGR webpage

Find the call for papers on the GRL webpage

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

Hadley cell expansion in CMIP6 models. By K.M. Griese and S.M. Davis in Atmospheric Chemistry and Physics.

The Research Unit VolImpact: Revisiting the volcanic impact on atmosphere and climate – preparations for the next big volcanic eruption. By C. von Savigny et al. in the Meteorologische Zeitschrift.

A New Theoretical Framework for Understanding Multiscale Atmospheric Predictability. By Y.Q. Sun and F. Zhang in the Journal of the Atmospheric Sciences.

Discussion papers – open for comment:

Influence of gravity wave temperature anomaly and its vertical gradient on cirrus clouds in the tropical tropopause layer – a satellite-based view. By K.-W. Chang and T. L’Ecuyer in Atmospheric Chemistry and Physics.

Transport model diagnosis of the mean age of air derived from stratospheric samples in the tropics. By H.T. Nguyen 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).

Assimilation of atmospheric infrasound data to constrain tropospheric and stratospheric winds. By J. Amezcua et al. in the Quarterly Journal of the Royal Meteorological Society.

Examining the impact of multiple climate forcings on simulated Southern Hemisphere climate variability. By A.F. Beraki et al. in Climate Dynamics.

Why are radar data so difficult to assimilate skillfully? By F. Fabry and V. Meunier in the Monthly Weather Review.

Subseasonal Vacillations in the Winter Stratosphere. By :C: Hardiman et al. in the Geophysical Research Letters.

Coupled Stratospheric Chemistry–Meteorology Data Assimilation. Part I: Physical Background and Coupled Modeling Aspects. By R. Ménard et al. in Atmosphere.

Coupled Stratospheric Chemistry–Meteorology Data Assimilation. Part II: Weak and Strong Coupling. By R. Ménard et al. in Atmosphere.

Facility for Climate Assessments (FACTS) – A Community Resource for Assessing Weather and Climate Variability. By D. Murray et al. in the Bulletin of the American Meteorological Society.

Observation of jet stream winds during NAWDEX and characterization of systematic meteorological analysis errors. By A. Schäfler et al. in the Monthly Weather Review.

A tropospheric pathway of the stratospheric quasi-biennial oscillation (QBO) impact on the boreal winter polar vortex. By K. Yamazaki et al. in Atmospheric Chemistry and Physics.

FOUR THEORIES OF THE MADDEN‐JULIAN OSCILLATION. By C. Zhang et al. in the Reviews of Geophysics.

Discussion papers – open for comment:

Superposition of gravity waves with different propagation characteristics observed by airborne and space-borne infrared sounders. By I. Krisch 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).

4Evaluation of Leading Modes of Climate Variability in the CMIP Archives. By J.T. Fasullo, A.S. Phillips, and C. Deser in the Journal of the Climate.

Eight lessons from COVID-19 to guide our climate response. By K.M. Artier in Eos.

Intercomparison of wind observations from the European Space Agency’s Aeolus satellite mission and the ALADIN Airborne Demonstrator. By O. Lux et al. in Atmospheric Measurement Techniques.

The co-evolution of technological promises, modelling, policies and climate change targets. By D. McLaren and N. Markusson in nature: climate change.

Regionally Varying Assessments of Upper-Level Tropical Width in Reanalyses and CMIP5 Models Using a Tropopause Break Metric. By E.R. Martin et al. in the Journal of the Climate.

Special issue: Advances in convection-permitting climate modelling. By A.F. Prein et al. in Climate Dynamics.

The South Asian Monsoon Circulation in Moist Isentropic Coordinates. By T.P. Sabin and O.M. Pauluis in the Journal of the Climate.

Zonally resolved water vapour coupling with tropical tropopause temperature: Seasonal and interannual variability, and influence of the Walker circulation. By K.V. Suneeth and S.S. Das in Climate Dynamics.

Earth 2020: Science, society, and sustainability in the Anthropocene. By P.D. Tortell in PNAS.

The Coupled Model Intercomparison Project: History, uses, and structural effects on climate research. By L. Touzé-Peiffer, A. Barberousse, and H. Le Treut in WIREs Climate Change.

Role of tropical variability in driving decadal shifts in the Southern Hemisphere summertime eddy-driven jet. By D. Yang et al. in the Journal of the Climate.

Discussion papers – open for comment:

ESD Reviews: mechanisms, evidence, and impacts of climate tipping elements. By S. Wang and Z. Hausfather in Earth System Dynamics

Due to COVID-19, AGU has extended the deadline to submit a Fall Meeting session, town hall, workshop and innovative session proposal until Thursday, 23 April 2020.

Find submission webpage

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

Decadal wintertime temperature changes in East Asia during 1958‐2001 and the contributions of internal variability and external forcing. By M. Luo et al. in the Journal of Geophysical Research: Atmospheres.

Dynamical and thermodynamical drivers of variability in European summer heat extremes. By L. Suarez-Gutierrez, et al. in Climate Dynamics.

Evaluation of the CAMS global atmospheric trace gas reanalysis 2003–2016 using aircraft campaign observations. By Y. Wang et al. in Atmospheric Chemistry and Physics.

Discussion papers – open for comment:

Global-scale distribution of ozone in the remote troposphere from ATom and HIPPO airborne field missions. By I. Bourgeois et al. in Atmospheric Chemistry and Physics.

Intra-annual variations of spectrally resolved gravity wave activity in the UMLT region. By R. Sedlak 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).

Spatiotemporal variability and trends in global solar radiation over Poland based on satellite‐derived data (1986–2015). By K. Kulesza in the International Journal of Climatology.

Towards an unbiased stratospheric analysis. By P. Laloyaux et al. in the Quarterly Journal of the Royal Meteorological Society.

Dehydration and low ozone in the tropopause layer over the Asian monsoon caused by tropical cyclones: Lagrangian transport calculations using ERA-Interim and ERA5 reanalysis data. By D. Li et al. in Atmospheric Chemistry and Physics.

CASEarth Poles: Big Data for the Three Poles. By X. Li et al. in the Bulletin of the American Meteorological Society.

Progress in simulating the Quasi‐biennial Oscillation in CMIP models. By J.H. Richter et al. in the Journal of Geophysical Research: Atmospheres.

Jet Latitude Regimes and the Predictability of the North Atlantic Oscillation. By K. Strommen in the the Quarterly Journal of the Royal Meteorological Society.

Can the world’s most influential climate report carry on? Nature News Q&A with Valérie Masson-Delmotte by Jeff Toffefson.

How COVID-19 could ruin weather forecasts and climate records. Nature news article by G. Viglione.

Discussion papers – open for comment:

Airborne measurements and large-eddy simulations of small-scale Gravity Waves at the tropopause inversion layer over Scandinavia. By S. Gisinger et al. in Atmospheric Chemistry and Physics.