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

Highlight articles (office choice):

Reduction in surface climate change achieved by the 1987 Montreal Protocol. By R. Goyal et al. in the Environmental Research Letters.

The scientific challenge of understanding and estimating climate change. By T. Palmer and B. Stevens in the Proceedings of the National Academy of Sciences.

Tropical climate variability in the Community Earth System Model: Data Assimilation Research Testbed. By J. Eliashiv, A.C. Subramanian, and A.J. Miller in Climate Dynamics.

Potential problems measuring climate sensitivity from the historical record. By A. Dessler in the Journal of the Climate.

Evaluating the performance of past climate model projections. By Z. Hausfather et al. in the Geophysical Research Letters.
– – See also: nature News article at: https://www.sciencemag.org/news/2019/12/even-50-year-old-climate-models-correctly-predicted-global-warming

Stratospheric Sulfate Aerosol Geoengineering Could Alter the High‐Latitude Seasonal Cycle. By J. Jiang et al. in the Geophysical Research Letters.

The Western Tibetan Vortex as an Emergent Feature of Near‐Surface Temperature Variations. By R.J. de Kok and W.W. Immerzeel in the Geophysical Research Letters.

Seasonal evolution of the effects of the El Niño–Southern Oscillation on lower stratospheric water vapor: Delayed effects in late winter and early spring. By Y. Liao, Q. Chen, and X. Zhou in Earth and Planetary Physics.

A Cautionary Note on the Long‐term Trend in Activity of the Madden‐Julian Oscillation During the Past Decades. By M. Lyu, X. Jiang, and Z. Wu in the Geophysical Research Letters.

Building long homogeneous temperature series across Europe: a new approach for the blending of neighboring series. By A.A. Squintu et al. in the Journal of Applied Meteorology and Climatology.

Discussion papers – open for comment:

Reaching 1.5 °C and 2.0 °C global surface temperature targets using stratospheric aerosol geoengineering. By S. Tilmes et al. in Earth System Dynamics.

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Dear friends and colleagues,

On behalf of the International Ozone Commission (IO3C) and the Organizing Committee, we cordially invite you to attend the next Quadrennial Ozone Symposium (QOS), which will be held in Seoul, Korea from 6 to 10 October 2020. The symposium will be hosted at the Yonsei University at the center of Seoul Metropolitan City, 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.

Seoul offers excellent opportunities for a very attractive Symposium. It is a modern city with over 600 years of history as the capital of Korea. It offers many cultural opportunities in the metropolitan area and in the suburbs. You can meet old history of Chosun Dynasty and very popular modern K-pop. The local cuisine reflects the influences of the city’s history and diversity. Enjoy the local gastronomy at the numerous small places. Seoul is easily accessible by direct flights from many cities worldwide. Hotel prices are very competitive for all categories.

The weather in October is quite pleasant, with an average temperature of 13 ºC and precipitation probability of ~10%.

Sincerely,

QOS 2020 Local Organizing Committee

Important dates

Deadline for abstract submission (April 15th 2020)
Application for young scientist/students’ support (May 1-15th 2020)
Notification of student support (June 30th 2020)
Selection of oral/poster presentation (May 31st 2020)
Notification of oral/poster presentations (June 30th 2020)
Final program (July 31st 2020)
Deadline for Pre-registration (Aug 31st 2020)

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

On the impact of future climate change on tropopause folds and tropospheric ozone. By D. Akritidis, A. Pozzer, and P. Zanis in Atmospheric Chemistry and Physics.

Viewing Forced Climate Patterns Through an AI Lens. By E.A. Barnes et al. in the Geophysical Research Letters.

Assessing the impact of observations in a multi‐year Reanalysis. By F.L.R. Diniz and R. Todling in the Quarterly Journal of the Royal Meteorological Society.

Towards a more integrated role for early career researchers in the IPCC process. By C. Gulizia et al. in Climatic Change.

Need for mountain weather stations climbs. By D.S. Hik and S.N. Williamson in Science Letters.

The impact of dropsonde and extra radiosonde observations during NAWDEX in autumn 2016. By M. Schindler et al. in the Monthly Weather Review.

Discussion papers – open for comments:

Influence of Asian Summer Monsoon Anticyclone on the Trace gases and Aerosols over Indian region. By G. Basha et al. in Atmospheric  Chemistry and Physics.

ESMValTool v2.0 – Extended set of large-scale diagnostics for quasi-operational and comprehensive evaluation of Earth system models in CMIP. By V. Eyring et al. in Geoscientific Model Development.

Consistency and structural uncertainty of multi-mission GPS radio occultation records. By A. Steiner et al. in Atmospheric Measurement Techniques.

On the interconnections among major climate modes and their common driving factors. By X. Pan et al. in Earth System Dynamics.

The World Climate Research Programme (WCRP) is celebrating 40 years of international climate science. To mark this milestone, the WCRP Climate Science Week will be held as part of the American Geophysical Union (AGU) Fall Meeting in San Francisco, December 2019. The WCRP Climate Science Week will include a 40th Anniversary Symposium, Science Sessions, Town Halls, Union Session, and an Early Career Researcher Workshop.

Please check the WCRP webpage for more details.

Would you like to support the WCRP Climate Science Week in recognition of the importance of climate research? Please get in touch with Michel Rixen at .

We look forward to seeing you in December!

First Circular (June 2019)

The Tropospheric Ozone Assessment Report (TOAR) is seeking nominations for its Steering Committee to guide the scientific and technical developments during the activity’s second phase. TOAR is an ongoing IGAC activity and has recently completed its first phase (2014-2019). The second phase of TOAR (TOAR-II) will commence in early 2020 and last five years, covering the four goals listed below.  TOAR-II will be led by a Steering Committee, comprised of co-chairs Owen Cooper and Martin Schultz and 9 additional members, who shall cover all world regions and reflect diversity in gender and other aspects. With this announcement TOAR encourages scientists to apply for the 9 seats on the Steering Committee, with rotating membership terms of 2.5 or 5 years.  Nominees are expected to devote sufficient time and effort to allow for regular participation at TOAR events and shall actively engage in the development and promotion of TOAR-II. They must be senior scientists or mid-career scientists with notable peer-reviewed publication records, demonstrating expertise in the realm of tropospheric ozone research.  Specializations of the nominee’s research should be related to one or more of the following: atmospheric chemistry or transport; ozone impacts on human health, vegetation or climate; statistics or “Big Data” analysis.  Self-nominations must be made by December 21, 2019, using the following web-form:

http://igacproject.org/activities/TOAR/TOAR_SC_Nomination_Form

Please direct any questions to the TOAR co-Chairs:

Dr. Owen R. Cooper
CIRES U. of Colorado/NOAA Earth System Research Laboratory, Boulder, USA

Dr. Martin G. Schultz
Forschungszentrum Jülich, Germany

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

Highlight papers (office choice):

The role of the stratosphere in subseasonal to seasonal prediction Part I: Predictability of the stratosphere. By D.I.V. Domeisen et al. in the Journal of Geophysical Research: Atmospheres.

The role of the stratosphere in subseasonal to seasonal prediction Part II: Predictability arising from stratosphere ‐ troposphere coupling. By D.I.V. Domeisen et al. in the Journal of Geophysical Research: Atmospheres.

A statistical analysis of the propagating quasi 16‐day waves at high latitudes and their response to sudden stratospheric warmings from 2005 to 2018. By Y. Gong et al. in the Journal of Geophysical Research: Atmospheres.

Which orographic scales matter most for medium‐range forecast skill in the Northern Hemisphere winter? By T. Kanehama et al. in the Journal of Advances in Modeling Earth Systems.

Does the Arctic stratospheric polar vortex exhibit signs of preconditioning prior to sudden stratospheric warmings? By Z.D. Lawrence and G.L. Manney in the Journal of the Atmospheric Sciences.

Unusual trapped mountain lee waves with deep vertical penetration and significant stratospheric amplitude. By J.J. Metz, D.R. Durran, and P.N. Blossey in the Journal of the Atmospheric Sciences.

Predictability of extratropical upper tropospheric circulation in the Southern Hemisphere by its main modes of variability. By M. Osman and C.S. Vera in the Journal of the Climate.

Realistic quasi‐biennial oscillation variability in historical and decadal hindcast simulations using CMIP6 forcing. By H. Pohlmann et al. in the Geophysical Research Letters.

The Elbrus (Caucasus, Russia) ice core record – Part 1: reconstruction of past anthropogenic sulfur emissions in south-eastern Europe. By S. Preunkert et al. in Atmospheric Chemistry and Physics.

The Emerging Technological Revolution in Earth Observations. By G. Stephens et al. in the Bulletin of the American Meteorological Society.

Impact of the QBO on Prediction and Predictability of the MJO Convection. By S. Wang et al. in the Journal of Geophysical Research: Atmospheres.

Is the recovery of stratospheric O3 speeding up in the Southern Hemisphere? An evaluation from the first IASI decadal record (2008–2017). By C. Wespes et al. in Atmospheric Chemistry and Physics.

Two overview papers have been prepared by the SNAP (Stratospheric Network for the Assessment of Predictability) community, and have recently been published int he Journal of Geophysical Research: Atmospheres. The publications are now available online:

The role of the stratosphere in subseasonal to seasonal prediction Part I: Predictability of the stratosphere. By D. I. V. Domeisen, A. H. Butler,  A. J. Charlton‐Perez, B. Ayarzagüena, M. P. Baldwin, E. Dunn‐Sigouin et al. in the Journal of Geophysical Research: Atmospheres.

The role of the stratosphere in subseasonal to seasonal prediction Part II: Predictability arising from stratosphere ‐ troposphere coupling. By By D. I. V. Domeisen, A. H. Butler,  A. J. Charlton‐Perez, B. Ayarzagüena, M. P. Baldwin, E. Dunn‐Sigouin et al. in the Journal of Geophysical Research: Atmospheres.

The World Data System (WDS; www.World-Data-System.org) is currently looking to fill three vacancies in their Scientific Committee, for current the period 2018-2021, due to members stepping down from the committee for personal reasons.

Please find a letter from Rorie Edmunds, Acting Executive Director, about the call:

Download cover letter

The WDS is dealing with a variety of data issues relevant to WCRP, so please consider responding to this call until 1 December 2019.

The World Data System (WDS) is an Interdisciplinary Body of the International Science Council (ISC; formerly ICSU) created by its 29th General Assembly in Maputo, Mozambique in 2008.

As an ISC Interdisciplinary Body, the mission of the World Data System is to support the ISC’s vision by promoting long-term stewardship of, and universal and equitable access to, quality-assured scientific data and data services, products, and information across all disciplines in the Natural and Social Sciences, and the Humanities. WDS aims to facilitate scientific research under the ISC umbrella by coordinating and supporting trusted scientific data services for the provision, use, and preservation of relevant datasets, while strengthening their links with the research community.

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

Possible implications of enhanced chlorofluorocarbon-11 concentrations on ozone. By M. Dameris, P. Jöckel and M. Nützel in Atmospheric Chemistry and Physics.

Observed changes in Brewer–Dobson circulation for 1980–2018. By Q. Fu et al. in the Environmental Research Letters.

The role of zonally averaged climate change in contributing to inter-model spread in CMIP5 predicted local precipitation changes. By C.I. Garfinkel et al. in the Journal of the Climate.

The Detailed Dynamics of the June–August Hadley Cell. By B.J. Hoskins, G.-Y. Yang, and R.M. Fonseca in the Quarterly Journal of the Royal Meteorological Society.

Assessment of Atmospheric Reanalyses with Independent Observations in the Weddell Sea, the Antarctic. By M.O. Jonassen et al. in the Journal of Geophysical Research: Atmospheres.

The Buffer Zone of the Quasi-Biennial Oscillation. By A. Match and S. Fueglistaler in the Journal of the Atmospheric Sciences.

Spring Aleutian Low weakening and surface cooling trend in northwest North America during recent decades. By C. Sun et al. in the Journal of Geophysical Research: Atmospheres.

Discussion papers – open for comment:

Decreases in wintertime total column ozone over the Tibetan Plateau during 1979–2017. By Y. Li et al. in Atmospheric Chemistry and Physics.

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