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

Early prediction of extreme stratospheric polar vortex states based on causal precursors. By M. Kretschmer et al. in Geophysical Research Letters.

The Response of the Southern Hemisphere Middle Atmosphere to the Madden-Julian oscillation during Austral Winter Using the Specified-Dynamics Whole Atmosphere Community Climate Model. By C. Yang et al. in the Journal of Climate.

MIPAS IMK/IAA carbon tetrachloride (CCl₄) retrieval and first comparison with other instruments. By E. Eckert et al. in Atmospheric Measurement Techniques.

More frequent Sudden Stratospheric Warming events due to enhanced MJO forcing expected in a warmer climate. By W. Kang and E. Tziperman in the Journal of Climate.

The Large Scale Dynamical Response of Clouds to Aerosol Forcing. By B. Soden and E.-S. Chung in the Journal of Climate.

Using the artificial tracer e90 to examine present and future UTLS tracer transport in WACCM. By M. Abalos et al. in the Journal of the Atmospheric Sciences.

An assessment of ozone mini-hole representation in reanalyses over the Northern Hemisphere. By L.F. Millan and G.L. Manney in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

The Impact of Non-uniform Sampling on Stratospheric Ozone Trends Derived from Occultation Instruments. By R.P. Damadeo et al. in Atmospheric Chemistry and Physics Discussions.

Deadline 14 August 2017

Future Earth is inviting contributions to defining its research priorities for "Health, Climate, and Environment". Review the document put together by the Future Earth Knowledge Action Network on Health and provide feedback through an online survey. Find more information at: http://futureearth.org/news/open-consultation-research-priorities-health-climate-and-environment

Each year since 1962, the American Geophysical Union (AGU) has elected as Fellows members whose visionary leadership and scientific excellence have fundamentally advanced research in their respective fields. This year, 61 members will join the 2017 class of Fellows. Joan Alexander, a previous SPARC Co-chair, has been recognised for her contributions by this prestigious award. Find more details and the full list of fellows at: https://eos.org/agu-news/2017-class-of-agu-fellows-announced

Deadline 30 September 2017

SPARC leadership is composed of experts from around the world who dedicate their time to SPARC’s international activities. These include the SPARC Scientific Steering Group (SSG), who serve to guide SPARC’s scientific focus. SPARC is now accepting nominations (or self-nominations) for SSG membership to serve from January 2019 – December 2021 (initial three-year term can be extended by two additional years). If you are interested please complete the online form available here. The deadline for nominations is 30 September 2017.

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

Investigation on the abnormal quasi-two day wave activities during sudden stratospheric warming period of January 2006. By S.-Y. Gu et al. in Atmospheric Chemistry and Physics.

Understanding the timescales of the tropospheric circulation response to abrupt CO2 forcing in the Southern Hemisphere: Seasonality and the role of the stratosphere. By K.M. Grise and L.M Polvani in the Journal of Climate.

Remarkable separability of circulation response to Arctic sea ice loss and greenhouse gas forcing. By K.E. McCusker et al. in Geophysical Research Letters.

Classifying the tropospheric precursor patterns of sudden stratospheric warmings. By M. Bao et al. in Geophysical Research Letters.

Retrieval of volcanic SO₂ from HIRS/2 using optimal estimation. By G.M. Miles et al. in Atmospheric Measurement Techniques.

Global atmospheric chemistry – which air matters. By M.J. Prather et al. in Atmospheric Chemistry and Physics.

OMI-measured increasing SO₂ emissions due to energy industry expansion and relocation in northwestern China. By Z. Ling et al. in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

Retrieving Vertical Ozone Profiles from Measurements of Global Spectral Irradiance. By G. Bernhard et al. in Atmospheric Measurement Techniques Discussions.

Radiative effects of ozone waves on the Northern Hemisphere polar vortex and its modulation by the QBO. By V. Silverman et al. in Atmospheric Chemistry and Physics Discussions.

Intraseasonal to interannual variability of Kelvin wave momentum fluxes as derived from high-resolution radiosonde data. By J.P. Sjoberg et al. in Atmospheric Chemistry and Physics Discussions.

The July 2017 edition of the newsletter is now available online:
http://www.aparc-climate.org/publications/newsletter/SPARC_newsletter_No49/

Download or browse the whole issue or pick from individual science articles and workshop reports.

The First Order Draft (FOD) of the IPCC Special Report on Global Warming of 1.5°C, will be available for expert review from 31 July 2017 to 24 September 2017. The expert review of the FOD is a key element of the IPCC assessment process. The purpose of this expert review is to help ensure that the report provides a balanced and comprehensive assessment of the latest scientific findings. An online registration process has been developed and is open for prospective expert reviewers via the IPCC web site. Find more information here: www.ipcc.ch/apps/comments/sr15/fod/register.php

9-10 October 2017, ESA/ESTEC, Noordwijk, The Netherlands

The HAPS4ESA workshop has found wide interest with over 70 abstracts received and the confirmation by major stakeholders to participate. The preliminary programme includes 36 oral and 46 poster presentations in four technical sessions:

• HAPS Applications
• HAPS Platforms and Systems
• HAPS for Earth Observation
• HAPS for Telecommunication and Navigation

The workshop aims to provide a space for in-depth discussion among participants, which will be guaranteed by providing sufficient time for the poster session and a plenary discussion.

Find registration website.

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

Thermodynamic constraint on the depth of the global tropospheric circulation. By D.W.J. Thompson et al. in the Proceedings of the National Academy of Sciences of the United States of America.

Influences of the MJO on the space-time organization of tropical convection. By J. Dias et al. in the Journal of Geophysical Research: Atmospheres.

Lidar ratios of stratospheric volcanic ash and sulfate aerosols retrieved from CALIOP measurements. By A.T. Prata et al. in Atmospheric Chemistry and Physics.

Hemispheric climate shifts driven by anthropogenic aerosol–cloud interactions. By E.-S. Chung and B.J. Soden in Nature Geoscience.

Response of the global surface ozone distribution to Northern Hemisphere sea surface temperature changes: implications for long-range transport. By K. Yi et al. in Atmospheric Chemistry and Physics.

The Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa field campaign: Overview and research highlights. By C. Flamant et al. in the Bulletin of the American Meteorological Society.

A perspective on climate model hierarchies. By N. Jeevanjee et al. in the Journal of Advances in Modeling Earth Systems.

Nearly identical cycles of the quasi-biennial oscillation in the equatorial lower stratosphere. By T.J. Dunkerton in the Journal of Geophysical Research: Atmospheres.

On the generation and maintenance of the 2012-2013 sudden stratospheric warming. By F. Xu and X.S. Liang in the Journal of the Atmospheric Sciences.

Momentum flux of convective gravity waves derived from an off-line gravity wave parameterization. Part I: Spatiotemporal variations at source level. By M.-J. Kang et al. in the Journal of the Atmospheric Sciences.

Secondary Gravity Wave Generation Over New Zealand During the DEEPWAVE Campaign. By K. Bossert et al. in the Journal of Geophysical Research: Atmospheres.

Post-millennium changes in stratospheric temperature consistently resolved by GPS radio occultation and AMSU observations. By S.M. Khaykin et al. in Geophysical Research Letters.

A cirrus cloud climate dial? By U. Lohmann and B. Gasparini in Science.

A climatology of Rossby wave generation in the middle atmosphere of the Southern hemisphere from MERRA reanalysis. By C. Rodas and M. Pulido in the Journal of Geophysical Research: Atmospheres.

On the aliasing of the solar cycle in the lower-stratospheric tropical temperature. By A. Kuchar et al. in the Journal of Geophysical Research: Atmospheres.

Sulfur injections for a cooler planet. By U. Niemeier and S. Tilmes in Science.

Discussion papers – open for comment

The SPARC water vapor assessment II: intercomparison of satellite and ground-based microwave measurements. By G.E. Nedoluha et al. in Atmospheric Chemistry and Physics Discussions.

Detectability of the Impacts of Ozone Depleting Substances and Greenhouse Gases upon Stratospheric Ozone Accounting for Nonlinearities in Historical Forcings. By J. Bandoro et al. in Atmospheric Chemistry and Physics Discussions.

Age and gravitational separation of the stratospheric air over Indonesia. By S. Sugawara et al. in Atmospheric Chemistry and Physics Discussions.

First tomographic observations of gravity waves by the infrared limb imager GLORIA. By I. Krisch et al. in Atmospheric Chemistry and Physics Discussions.

The Ozone Monitoring Instrument: Overview of twelve years in space. By P. Levelt et al. in Atmospheric Chemistry and Physics Discussions.

Abstract submission deadline: 15 Aug 2017
Deadline for travel support requests: 1 Aug 2017

An Early Career Researchers (ECR) Symposium and WCRP/SPARC workshop on “WCRP Grand Challenges and Regional Climate Change” will be held in Incheon, Republic of Korea, from 18-20 October 2017.

ECR Symposium

A half-day symposium for early career researchers (ECRs) is organised as a part of the SPARC local workshop. This symposium consists of a series of invited lectures from distinguished scientists as well as poster presentations from ECR on broad issues of SPARC-related science and regional climate change. ECR from Asian and Oceanian countries are encouraged to join the symposium to extend their research horizons through active discussion with leading international scientists.

WCRP/SPARC Workshop on “WCRP Grand Challenges and Regional Climate Change”

SPARC (Stratosphere-troposphere Processes And their Role in Climate) is a core project of the WCRP (World Climate Research Program), coordinating international efforts to bring knowledge of the stratosphere-troposphere system to bear on relevant issues in climate variability and prediction.

This SPARC-sponsored workshop aims to:

1. Identify the SPARC-related research topics of relevance to Asia,
2. Bring international and Asian scientists together for active interactions and collaborations, and
3. Promote capacity development in Asia.

Please submit a short abstract by 15 August 2017 by email to: sparcworkshop2017@gmail.com.

Confirmed invited speakers:

ECR Symposium: Marvin Geller, Michaela Hegglin, Harry Hendon

WCRP/SPARC Workshop: In-Sik Kang, Wen Chen, Hye-Young Chun, Shigeo Yoden, Seung-Ki Min, Jinro Ukita, Sujong Jeong, Hyun-Suk Kang, Xiu-Qun Yang

Travel support:

Partial or full travel support will be available for the ECR symposium and local workshop for ECR from developing countries.

Please note that the applications for travel support are due by 1 August 2017. All applicants also need to submit an abstract for the ECR poster presentation.

The selected recipients for travel support will be notified by mid August.

More information and registration can be found here.