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

 
Stratospheric Connection to the Abrupt End of the 2016/2017 Iberian Drought. By B. Ayarzagüena et al. in the Geophysical Research Letters.

Intraseasonal responses of the East Asia summer rainfall to anthropogenic aerosol climate forcing. By G. Chen et al. in Climate Dynamics.

QBO influence on MJO amplitude over the Maritime Continent: Physical mechanisms and seasonality. By C.R. Densmore, E.R. Sanabia, and B.S. Barrett in the Monthly Weather Review.

The effect of a well-resolved stratosphere on East Asian winter climate. By K. Wei et al. in Climate Dynamics.

Discussion papers – open for comment:

Current rapid global temperature rise linked to falling SO2 emissions. By N.E.B. Cowern in Earth System Dynamics.

Seasonal characteristics of chemical and dynamical transports into the extratropical upper troposphere/lower stratosphere. By Y. Inai 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).

Stratospheric Connection to the Abrupt End of the 2016/2017 Iberian Drought. By B. Ayarzagüena et al. in the Geophysical Research Letters.

Climate data empathy. By S. Brönnimann and J. Wintzer in WIREs Climate Change.

Response of Arctic ozone to sudden stratospheric warmings. By A. de la Cámara et al. in Atmospheric Chemistry and Physics.

Reconstructing climatic modes of variability from proxy records: sensitivity to the methodological approach. By S. Michel et al. in Geoscientific Model Development.

Climate, weather, and water in history. By R.A. Morgan in WIREs Climate Change.

Global Climatologies of Fronts, Airmass Boundaries, and Airstream Boundaries: Why the Definition of “Front” Matters. By C.M. Thomas and D.M. Schultz in the Monthly Weather Review.

Polar amplification dominated by local forcing and feedbacks. By M.F. Stuecker et al. in Nature Climate Change.

The vertical wave number spectra of potential energy density in the stratosphere deduced from the COSMIC satellite observation. By Y.Y. Yan et al. in the Quarterly Journal of the Royal Meteorological Society.

Intermodel differences in upwelling in the tropical tropopause layer among CMIP5 models. By K. Yoshida, R. Mizuta, and O. Arakawa in the Journal of Geophysical Research: Atmospheres.

Discussion papers – open for comment:

Convective hydration in the tropical tropopause layer during the StratoClim aircraft campaign: Pathway of an observed hydration patch. By K.-O. Lee 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).

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.

Discussion papers – open for comment:

Correlated observation error models for assimilating all-sky infrared radiances. By A.J. Geer in Atmospheric Measurement Techniques.

We are thrilled to hear that Don Wuebbles has received this award which he thoroughly deserves. Don has contributed to SPARC science for many years and is currently a valuable member of the SPARC Steering Group.  – The SPARC co-chairs

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

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

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.

Discussion papers – open for comment:

Unravelling the microphysics of polar mesospheric cloud formation. By D. Duft, M. nachbar, and T. Leisner in Atmospheric Chemistry and Physics.

Position announcement from 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, / +47 98677226

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

Highlight article (office choice):
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.

Discussion papers – open for comment:

Ice injected up to the Tropopause by Deep Convection: 1) in the Austral Convective Tropics. By I.-A. Dion 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).

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.

Discussion papers – open for comment:

The influence of mixing on stratospheric circulation changes in the 21st century. By R. Eichinger et al. in Atmospheric Chemistry and Physics.

The importance of interactive chemistry for stratosphere–troposphere–coupling. By S. Haase and K. Matthes in Atmospheric Chemistry and Physics.

Influence of Arctic Stratospheric Ozone on Surface Climate in CCMI models. By O. Harari et al. in Atmospheric Chemistry and Physics.

Indications for a potential synchronization between the phase evolution of the Madden-Julian oscillation and the solar 27-day cycle. By C.G. Hoffmann and C. von Savigny in Atmospheric Chemistry and Physics.

The global overturning diabatic circulation of the stratosphere as a metric for the Brewer-Dobson Circulation. By M. Linz et al. in Atmospheric Chemistry and Physics.

Purpose:

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

Abstract submission is now open for the

“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 the 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)