In a comprehensive review, the SPARC LOTUS activity assessed long-term trends of Ozone in the Stratosphere.
Find SPARC Report No. 9,
edited by the SPARC LOTUS activity team.
A selection of new science articles from the past week of interest to the SPARC community (a SPARC Office choice).
Evidence for a major missing source in the global chloromethane budget from stable carbon isotopes. By E. Bahlmann et al. in Atmospheric Chemistry and Physics.
Type Classification of Sudden Stratospheric Warming Based on Pre- and Post-Warming Periods. By H. Choi, B.-M. Kim, and W. Choi in the Journal of the Climate.
Global Impacts of ENSO Reach into the Stratosphere. By D.I.V. Domeisen, C.I. Garfinkel, and A.H. Butler in Earth & Space Science News (EOS).
Recent Trends in Stratospheric Chlorine From Very Short‐Lived Substances. By R. Hossaini et al. in the Journal of Geophysical Research: Atmospheres.
The effects of a well-resolved stratosphere on the simulated boreal winter circulation in a climate model. By Y. Kawatani et al. in the Journal of the Atmospheric Sciences.
Detection and attribution of upper-tropospheric warming over the tropical western Pacific. By Y. Li et al. in Climate Dynamics.
Bridging the Weather-to-Climate Prediction Gap. By A. Mariotti et al. in Earth & Space Science News (EOS).
An Introduction to Atmospheric Gravity Wave Science in the Polar Regions and First Results From ANGWIN. By T. Moffat-Griffin in the Journal of Geophysical Research: Atmospheres.
Interpreting contemporary trends in atmospheric methane. By A.J. Turner, C. Frankenberg, and E.A. Kort in the Proceedings of the National Academy of Sciences of the United States of America (PNAS).
Understanding the variation of stratosphere–troposphere coupling during stratospheric northern annular mode events from a mass circulation perspective. By Y. Yu and R. Ren in Climate Dynamics.
An Arctic‐Tibetan connection on subseasonal to seasonal time scale. By Y. Zhang, T. Zhu, and Y. Xue in the Geophysical Research Letters.
Discussion papers – open for comment:
Comparison of equatorial wave activity in the tropical tropopause layer and stratosphere represented in reanalyses. By Y.-H. Kim 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).
DATeS: a highly extensible data assimilation testing suite v1.0. By A. Attia and A. Sandu in Geoscientific Model Development.
The Upper Stratospheric Solar Cycle Ozone Response. By W.T. Ball et al. in the Geophysical Research Letters.
Atmospheric circulation modulates the spatial variability of temperature in the Atlantic‐Arctic region. By O. Champagne et al. in the International Journal of Climatology.
S2S reboot: An argument for greater inclusion of machine learning in subseasonal to seasonal forecasts. By J. Cohen et al. in WIREs Climate Change.
Seasonal and diurnal variability in O3, black carbon, and CO measured at the Rwanda Climate Observatory. By H. Langley DeWitt et al. in Atmospheric Chemistry and Physics.
A thermodynamic climatology of the disturbed stratospheric polar vortex. By T.S. Ehrmann and S.J. Colucci in the International Journal of Climatology.
Embracing the complexity of extreme weather events when quantifying their likelihood of recurrence in a warming world. By L.J. Harrington et al. in the Environmental Research Letters.
11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America. By P. Llamedo et al. in the Journal of Geophysical Research: Atmospheres.
Improved decadal prediction of Northern-Hemisphere summer land temperature. By B. Wu et al. in Climate Dynamics.
Change Point Analysis of Global Temperature Records. By M. Yu and E. Ruggieri in the International Journal of Climatology.
Relationship between Asian monsoon strength and transport of surface aerosols to the Asian Tropopause Aerosol Layer (ATAL): interannual variability and decadal changes. By C. Yuan 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).
Warming Trends in Summer HeatWaves. By S.C. Chapman, N.W. Watkins, and D.A. Stainforth in the Geophysical Research Letters.
El Niño–Southern Oscillation variability, teleconnection changes and responses to large volcanic eruptions since AD 1000. By C. Dätwyler et al. in the International Journal of Climatology.
Nonlinearity in the North Pacific atmospheric response to a linear ENSO forcing. By B. Jiménez‐Esteve and D. I.V. Domeisen I the Geophysical Research Letters.
Characterization of inertia gravity waves and associated dynamics in the lower stratosphere over the Indian Antarctic station, Bharati (69.4°S, 76.2°E) during austral summers. By N. Koushik et al. in Climate Dynamics.
Updates of HITRAN spectroscopic database from 2008 to 2016 and implications for near‐infrared radiative transfer calculations. By K.P. Menang in the Quarterly Journal of the Royal Meteorological Society.
Retrieving the age of air spectrum from tracers: principle and method. By A. Podglajen and F. Ploeger in Atmospheric Chemistry and Physics.
Indian summer monsoon onset signatures on the tropical tropopause layer. By S. RavindraBabu et al. in the Atmospheric Science Letters.
The St.Petersburg State University will hold the International Symposium on Atmospheric Radiation and Dynamics (ISARD-2019) in St.-Petersburg-Peterhof, June 25-27, 2019.
Working languages of the Symposium are English and Russian.
Deadline for abstract submission: April 25, 2019
Deadline for payment of early bird registration fee: May 15, 2019
Contacts: Evgenia Shulgina
Chairman of the ISARD-2019 Program Committee: Prof. Yury Timofeyev Chairman of the Russian Radiation Commission
1. Satellite sounding of atmosphere and surface.
2. Remote sensing of atmosphere and underlying surface in different spectral ranges.
3. Radiative transfer theory.
4. Radiation-cloud and radiation-aerosol interactions.
5. Radiative climatology and algorithms in models for weather and climate forecasting.
6. Field studies of radiative characteristics of atmosphere and surface.
7. Wave characteristics, macrocirculation and dynamics interactions in atmospheres of the Earth and other planets.
8. Structure of middle and upper atmosphere of the Earth and other planets.
9. Photochemistry and kinetics of excited states of atoms and molecules and non-LTE radiation in the atmosphere of the Earth and other planets.
10. Radiation and dynamics of polar atmosphere.
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 2020 SSC. For 2020, nominations for scientists working in Africa, Latin America, North America, and Southeast Asia are strongly encouraged. Nominations will be accepted until 15 March 2019. For information on 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.
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 (). Thank you. About IGAC The atmosphere is the integrator of the Earth system. Human emissions of pollutants and long-lived greenhouse gases into the atmosphere have caused dramatic transformations of the planet, altering air quality, climate and nutrient flows in every ecosystem. Understanding the global atmosphere requires an international network of scientists providing intellectual leadership in areas of atmospheric chemistry that need to be addressed, promoted, and accomplished through research across disciplines and geographical boundaries. Acknowledgement of this need led to the formation of the International Global Atmospheric Chemistry (IGAC) Project in 1990. IGAC’s mission is to facilitate atmospheric chemistry research towards a sustainable world. This is achieved through IGAC’s three focal activities: fostering community, building capacity, and providing leadership. IGAC’s priorities and activities are determined and guided by an international volunteer Scientific Steering Committee (SSC). Serving on the IGAC SSC is a unique and enjoyable opportunity to contribute to the international atmospheric chemistry community.
Nanjing, China, 21 October – 1 November 2019
Understanding disaster risk will enable climate experts to generate more tailored climate knowledge and information for risk reduction and management. Similarly, understanding past and future changes and uncertainty in the projection of weather and climate extremes will enable risk management experts to use climate information properly and more effectively. As such, it is important to improve the flow of knowledge between those engaged in climate research and risk management by building partnerships and collaborations between the climate research and risk reduction and management communities across the World Climate Research Programme (WCRP), the Integrated Research on Disaster Risk (IRDR), the Intergovernmental Panel on Climate Change (IPCC) and many other global/regional initiatives.
WCRP and its partners seek to bring together early career scientists and professionals to learn from each other on weather and climate extremes and disaster risk reduction and management.
The Institute of Advanced Studies in Climate Extremes and Risk Management aims to provide a collaborative environment for world-leading experts from IPCC Working Groups I and II and future science leaders. The programme is designed for early career researchers*, our future leaders in the field of climate science and risk management. It will be held between 21 October to 1 November 2019, Nanjing, China.
To participate in this training opportunity, please complete the application form. Details about the institute and the online application form can be found on the WCRP website.
Limited financial assistance, through a selection process, may be available and can be requested on the application form. The deadline for application is 28 March 2019.
The joint workshop will focus on new results from the multi-model experiments to quantify changes in composition, the resulting effective radiative forcing and the consequent climate responses. Data from idealised experiments are already available from PDRMIP. Data generated under the RFMIP and AerChemMIP protocols is being made available at https://esgf-node.llnl.gov/search/cmip6/.
To discuss scientific results emerging from the analysis of AerChemMIP, RFMIP and PDRMIP simulations in support of IPCC-AR6. This workshop will be of interest to all those analyzing chemistry-climate interactions, air quality-climate connections, model forcing and response. We encourage attendance from modeling centers contributing to AerChemMIP or RFMIP experiments.
The workshop will run from 9:00am on Tuesday 11th June and end at 1:00pm on Friday 14th June. The format will include science presentations (oral and poster) and discussion sessions.
More information including details on how to register and submit abstract will be sent out in the coming weeks.
Deadlines: Abstract submission and registration by April 12th 2019
Scientific Organizing Committee: Bill Collins (U Reading), Stephanie Fiedler (MPI), Piers Forster (U Leeds), Jean-François Lamarque (NCAR), Gunnar Myhre (CICERO), Vaishali Naik (GFDL), David Paynter (GFDL), Robert Pincus (U Colorado), V. Ramaswamy (GFDL), Michael Schulz (Met Norway), and Bjorn Stevens (MPI)
Local Organizing Committee: David Paynter, Vaishali Naik, and V. Ramaswamy
A selection of new science articles from the past week of interest to the SPARC community (a SPARC Office choice).
New insights on the impact of ozone depleting substances on the Brewer‐Dobson circulation. By M. Abalos et al. in the Journal of Geophysical Research: Atmospheres.
Observed and Simulated Teleconnections Between the Stratospheric Quasi‐Biennial Oscillation and Northern Hemisphere Winter Atmospheric Circulation. By M.B. Andrews et al. in the Journal of Geophysical Research: Atmospheres.
The upper stratospheric solar cycle ozone response. By W:T: Ball et al. in the Geophysical Research Letters.
Subseasonal to Decadal Predictions: Successes and Challenges. By G. Danabasoglu, F. Vitart, and W. J. Merryfield. Conference report in Earth & Space Science News (EOS).
Systematic Decomposition of the MJO and its Northern Hemispheric Extra‐Tropical Response into Rossby and Inertio‐Gravity Components. By L.E. Franzke et al. in the Quarterly Journal of the Royal Meteorological Society.
A new MesosphEO data set of temperature profiles from 35 to 85 km using Rayleigh scattering at limb from GOMOS/ENVISAT daytime observations. By A. Hauchecorne et al. in Atmospheric Measurement Techniques.
Uncertainty component estimates in transient climate projections. By B. Hingray et al. in Climate Dynamics.
Global mean surface temperature response to large‐scale patterns of variability in observations and CMIP5. By J.B. Kajtar et al. in the Geophysical Research Letters.
The early development of the 2015/2016 Quasi-Biennial Oscillation disruption. By P. Lin, I. Held, and Y. Ming in the Journal of the Atmospheric Sciences.
High-resolution temperature profiles retrieved from bichromatic stellar scintillation measurements by GOMOS/Envisat. By V.F. Sofieva et al. in AtmosphericMmeasurement Techniques.
Evaluating Simulations of Interhemispheric Transport: Interhemispheric Exchange Time Versus SF6 Age. By H. Yang et al. in the Geophysical Research Letters.
The Corresponding Tropospheric Environments during Downward-extending and Non-downward-extending Events of Stratospheric Northern Annular Mode Anomalies. By R. Zhang et al. in the Journal of the Climate.
Clarifying the Relative Role of Forcing Uncertainties and Initial‐Condition Unknowns in Spreading the Climate Response to Volcanic Eruptions. By D. Zanchettin et al. in the Geophysical Research Letters.
Discussion papers – open for comment:
EDGAR v4.3.2 Global Atlas of the three major Greenhouse Gas Emissions for the period 1970–2012. By G. Janssens-Maenhout et al. in Earth System Science Data.
A selection of new science articles from the past week of interest to the SPARC community (a SPARC Office choice).
From reliable weather forecasts to skilful climate response: a dynamical systems approach. By H.M. Christensen and J. Berner in the Quarterly Journal of the Royal Meteorological Society.
The influence of mixing on the stratospheric age of air changes in the 21st century. By R. Eichinger et al. in Atmospheric Chemistry and Physics.
Simulation of the ENSO influence on the extra-tropical middle atmosphere. By T.S. Ermakova et al. in Earth, Planets and Space.
Vortex dynamics of stratospheric sudden warmings: a reanalysis data study using PV contour integral diagnostics. By F. Kwasniok, R. Beaumant, and J. Thuburn in the Quarterly Journal of the Royal Meteorological Society.
Beware of Inertial Instability masquerading as gravity waves in stratospheric temperature perturbations. By V. lynn Harvey and J.A. Knox in the Geophysical Research Letters.
Comparison of Antarctic polar stratospheric cloud observations by ground-based and space-borne lidar and relevance for chemistry–climate models. By M. Snels et al. in Atmospheric Chemistry and Physics.
Discussion papers – open for comment:
Data rescue of daily climate station-based observations across Europe. By J.R. Coll et al. in Earth System Science Data.