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

Highlight article (office choice):
Taking climate model evaluation to the next level. By V. Eyring et al. in Nature: Climate Change.

Connections between the Madden–Julian Oscillation and surface temperatures in winter 2018 over eastern North America. By B.S. Barrett in the Atmospheric Science Letters.

Structural changes in the shallow and transition branch of the Brewer–Dobson circulation induced by El Niño. By M. Diallo et al. in Atmospheric Chemistry and Physics.

Factors Influencing the Seasonal Predictability of Northern Hemisphere Severe Winter Storms. By F. Hansen, et al. in the Geophysical Research Letters.

Weak stratospheric polar vortex events modulated by the Arctic sea ice loss. By K. Hoshi et al. in the Journal of Geophysical Research: Atmospheres.

Quantifying uncertainties due to chemistry modeling – evaluation of tropospheric composition simulations in the CAMS model. By V. Huijnen et al. in Geoscientific Model Development.

The Efficiency of Data Assimilation. By G. Nearing et al. in Water Resources Research.

Representation of synoptic‐scale Rossby Wave Packets and Blocking in the S2S Prediction Project Database. By J.F. Quinting and F. Vitart in the Geophysical Research Letters.

Discussion papers – open for comment:

Extratropical Age of Air trends and causative factors in climate projection simulations. By P. Šácha 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).

Simulating the Antarctic stratospheric vortex transport barrier: comparing the Unified Model to reanalysis. By C. Cameron et al. in Climate Dynamics.

The South American Low‐Level Jet: a New Climatology, Variability, and Changes. By T.L. Montini, C. Jones, and L.M.V. Carvalho in the Journal of Geophysical Research: Atmospheres.

Initialization and ensemble generation for decadal climate predictions: A comparison of different methods. By I. Polkova et al. in the Journal of Advances in Modeling Earth Systems.

A Dynamical Perspective on Atmospheric Temperature Variability and its Response to Climate Change. By T. Tamarin-Brodsky et al. in the Journal of the Climate.

The Development of the North Pacific Jet Phase Diagram as an Objective Tool to Monitor the State and Forecast Skill of the Upper-Tropospheric Flow Pattern. By A.C. Winters, D. Keyser, and L.F. Bosart in Weather and Forecasting.

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

Atmospheric Motion Vectors Derived from an Infrared Window Channel of a Geostationary Satellite Using Particle Image Velocimetry. By W.-L. Chuang et al. in the Journal of Applied Meteorology and Climatology.

Analysis of Climate Trends and Leading Modes of Climate Variability for MENA Region. By M.M. Dogar and T. Sato in the Journal of Geophysical Research: Atmospheres.

Adapting attribution science to the climate extremes of tomorrow. By L.J. Harrington and F.E.L. Otto in the Environmental Research Letters.

The Role of Internal Variability in Twenty‐First‐Century Projections of the Seasonal Cycle of Northern Hemisphere Surface Temperature. By V. Yettella and M.R. England in the Journal of Geophysical Research: Atmospheres.

Causes of East Asian Temperature Multidecadal Variability Since 850 CE. By J. Wang et al. in the Geophysical Research Letters.

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

S2S reboot: An argument for greater inclusion of machine learning in subseasonal to seasonal forecasts. By J. Cohen et al. in WIREs Climate Change.

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.

Predicting Sudden Stratospheric Warming 2018 and its Climate Impacts with a Multi‐Model Ensemble. By A. Karpechko et al. in the Geophysical Research Letters.

The three atmospheric circulations over the Indian Ocean and the Maritime Continent and their modulation by the passage of the MJO. By D. Kuznetsova, T. Dauhut, and J.-P. Chaboureau in the Journal of the Atmospheric Sciences.

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.

High tropospheric ozone in Lhasa within the Asian summer monsoon anticyclone in 2013: influence of convective transport and stratospheric intrusions. By D. Li et al. in Atmocpheric Chemistry and Physics.

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 Atmoshperic Sciences.

Extreme cold wave over East Asia in January 2016: A possible response to the larger internal atmospheric variability induced by Arctic warming. By S. Ma and C. Zhu in the Journal of the Climate.

Madden–Julian oscillation changes under anthropogenic warming. By E.D. Maloney, Á.F. Adames, and H.X. Bui in Nature: Climate Change.

Discussion papers – open for comment:

The upper-atmosphere extension of the ICON general circulation model. By S. Borchert et al. in Geoscientific Model Development.

Characteristics of the tropical tropopause inversion layer using high-resolution temperature profiles retrieved from COSMIC GNSS Radio Occultation. By N. Noersomadi, T. Tsuda, and M. Fujiwara in Atmospheric Chemistry and Physics.

Variability of temperature and ozone in the upper troposphere and lower stratosphere from multi-satellite observations and reanalysis data. By M. Shangguan, W. Wang, and S. Jin in Atmospheric Chemistry and Physics.

The deadline for submitting abstracts to the EGU General Assembly 2019 is on 10 January 2019.

The meeting will take place from 7 to 12 April in Vienna, Austria.

Find meeting webpage

The International Symposium On The Unexpected Increase in Emissions of Ozone-Depleting CFC-11 will take place 25-27 March, 2019 in Vienna, Austria.

The registration deadline has been extended until the end of day on Monday, January 14, 2019.

Please find additional information on the meeting webpage

Click here to register now.

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

A 17 year climatology of the macrophysical properties of convection in Darwin. By R.C. Jackson et al. in Atmospheric Chemistry and Physics.

A Multivariate Probabilistic Framework for Tracking the Intertropical Convergence Zone: Analysis of Recent Climatology and Past Trends. By A. Mamalakis and E. Foufoula‐Georgiou in the Geophysical Research Letters.

Quantifying the irreducible uncertainty in near‐term climate projections. By J. Marotzke in WIREs Climate Change.

Estimating daily climatological normals in a changing climate. By A. Rigal, J.-M. Azaïs, and A. Ribes in Climate Dynamics.

Estimation of the variability of mesoscale energy spectra with three years of COSMO-DE analyses. By T. Selz, L. Bierdel, and G.C. Craig in the Journal of the Atmospheric Sciences.

ITCZ width controls on Hadley cell extent and eddy-driven jet position, and their response to warming. By O. Watt-Meyer and D.M.W. Frierson in the Journal of the Climate.

Discussion papers – open for comment:

Mechanism of ozone loss under enhanced water vapour conditions in the mid-latitude lower stratosphere in summer. By S. Robrecht et al. in Atmospheric Chemistry and Physics.

A numerical process study on the rapid transport of stratospheric air down to the surface over western North America and the Tibetan Plateau. By B. Škerlak et al. in Atmospheric Chemistry and Physics.

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)

The draft WCRP Strategic Plan 2019-2028 has now been finalized by the WCRP Joint Scientific Committee (JSC) and is awaiting approval from the WCRP Co-sponsors: the World Meteorological Organization, the Intergovernmental Oceanographic Commission of UNESCO and the International Science Council. Until this approval is obtained, the document remains in draft status. We thank everyone who provided suggestions and feedback on the draft WCRP Strategic Plan in the last year. To those of you who submitted comments as part of the public consultation, those comments (in anonymous form) and JSC responses to them are now available online: WCRP Strategic Plan public consultation responses.

Learn more at the Exhibition Booth 557 at the AGU:

See the map of AGU exhibition booths

The WCRP booth is located in the bottom row, five booths from the far left.

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

The Impact of Tropospheric and Stratospheric Tropical Variability on the Location, Frequency, and Duration of Cool-Season Extratropical Synoptic Events. By H.E. Attard and A.L. Lang in the Monthly Weather Review.

A new perspective toward cataloging Northern Hemisphere Rossby wave breaking on the dynamic tropopause. By K.A. Bowley, J.R. Gyakum, and E.H. Atallah in the Monthly Weather Review.

Exploiting the abrupt 4×CO2 scenario to elucidate tropical expansion mechanisms. By R. Chemke and L.M. Polvani in the Journal of the Climate.

The Circulation Response to Volcanic Eruptions: The Key Roles of Stratospheric Warming and Eddy Interactions. By K. DellaSanta, E.P. Gerber, and M. Toohey in the Journal of the Climate.

The Teleconnection of El Niño Southern Oscillation to the Stratosphere. By D.I.V. Domeisen, C.I. Garfinkel, and A.H. Butler in the Reviews of Geophysics.

Quantifying the variability of the annular modes: reanalysis uncertainty vs. sampling uncertainty. By E.P. Gerber and P. Martineau in Atmospheric Chemistry and Physics.

Combining data from the distributed GRUAN site Lauder–Invercargill, New Zealand, to provide a site atmospheric state best estimate of temperature. By J.S. Tradowsky et al. in Earth System Science Data.

The British-Baikal Corridor: A teleconnection pattern along the summertime polar front jet over Eurasia. By P. Xu, L. Wang, and W. Chen in the Journal of the Climate.

Discussion papers – open for comment:

Climate feedbacks in the Earth system and prospects for their evaluation. By C. Heinze et al. in Earth System Dynamics.