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

Global large-scale stratosphere–troposphere exchange in modern reanalyses. By A.C. Boothe and C.R. Homeyer in Atmospheric Chemistry and Physics.

The Role of Natural Climate Variability in Recent Tropical Expansion. By R.J. Allen And M. Kovilakam in the Journal of Climate.

First reprocessing of Southern Hemisphere ADditional OZonesondes (SHADOZ) profile records (1998-2015) 1: Methodology and evaluation. By J.C. Witte et al. in the Journal of Geophysical Research: Atmospheres.

Late 21st Century Changes in the Mid-latitude Atmospheric Circulation in the CESM Large Ensemble. By Y. Peings et al. in the Journal of Climate.

The viability of trajectory analysis for diagnosing dynamical and chemical influences on ozone concentrations in the UTLS. By J.W. Bergman et al. in the Journal of Geophysical Research: Atmospheres.

Local wave activity and the onset of blocking along a potential vorticity front. By N. Nakamura and C.S.Y. Huang in the Journal of Atmospheric Sciences.

A study of different frequencies of major stratospheric sudden warmings in CMIP5 historical simulations. By M. Taguchi in the Journal of Geophysical Research: Atmospheres.

Relevant Climate Response Tests for Stratospheric Aerosol Injection: A Combined Ethical and Scientific Analysis. By A. Lenferna et al. in Earth’s Future.

The stratospheric changes inferred from 10 years of AIRS and AMSU-A radiances. By F. Pan et al. in the Journal of Climate.

Large-Scale Control of the Lower Stratosphere on Variability of Tropical Cyclone Intensity. By M. Ferrara et al. in Geophysical Research Letters.

Merged ozone profiles from four MIPAS processors. By A. Laeng et al. in Atmospheric Measurement Techniques.

Discussion papers – open for comment

Comparison of large-scale dynamical variability in the extratropical stratosphere among the JRA-55 family data sets. By M. Taguchi in Atmospheric Chemistry and Physics Discussions.

An update on ozone profile trends for the period 2000 to 2016. By W. Steinbrecht et al. in Atmospheric Chemistry and Physics Discussions.

An assessment of Ozone Mini-holes Representation in Reanalyses Over the Northern Hemisphere. By L. Millan and G. Manney in Atmospheric Chemistry and Physics Discussions.

Attribution of recent ozone changes in the Southern Hemisphere mid-latitudes using statistical analysis and chemistry-climate model simulations. By G. Zeng et al. in Atmospheric Chemistry and Physics Discussions.

Registration deadline: 7 July 2017
Abstract Decision: 14 July 2017

The objective of the joint SPARC Dynamics & Observations Workshop is to gather together researchers to better understand the processes and patterns coupling the tropical troposphere, stratosphere and beyond.

An understanding will be gained by focusing on the interplay between large-scale phenomena such as the MJO, monsoons, tropical cyclones and QBO, their association with moist convection and its large scale organization, and their representation within simple and complex models.

The main activities of the joint meeting will include:

• reporting results from the joint model experiments and analyses that were planned at the 2015 & 2016 SPARC QBO workshops,
• exploring opportunities for improved awareness, dissemination and exploitation of existing networks of high resolution radiosonde data, and
• further the science of stratosphere-troposphere coupling within the tropics.

The Workshop will be held on 9-14 October 2017 within the Maskawa Building for Education and Research, at Kyoto University.

The Workshop is an outflow of the SPARC QBOi (Quasi-Biennial Oscillation Initiative), FISAPS (Fine Scale Atmospheric Processes and Structures), and SATIO-TCS (Stratospheric And Tropospheric Influences On Tropical Convective Systems) activities.

Please prepare your abstract and register it at the registration page.

Find more details here.

The SPARC Reanalysis Intercomparison Project (S-RIP) is conducting a survey to determine user requirements for future reanalysis data products. Two Google documents were set up, one asking for the pressure/isentropic levels needed for research, the other document asking which additional data you need (‘wish list’, e.g. more isentropic and pressure levels, potential vorticity on model levels, gravity wave drag diagnostics, etc.).

Researchers interested in reanalysis data are most welcome to participate in this survey before 30 June 2017.

Isentropic and Pressure Level Data Needs

‘Wish List’

David Carlson, Director of the secretariat of the World Climate Research Programme (WCRP), SPARC’s parent organisation, resigns from WCRP.

In his message to the WCRP community he states that "even as we apply our skills and tools to careful detection, quantification and prediction of (climate) change we remain too firmly wedded to existing structures and acronyms….We must persistently question our internal structures just as much as we persistently press for improved models or improved understanding". David also encourages WCRP to pay greater attention to our carbon impact – in research but also in our practices and working modalities amongst others.

Read the full message to the WCRP community.

Registration via Limb Workshop website

The first working meeting of the emerging SPARC activity
"Towards Unified Error Reporting (TUNER)" will take place

at the University of Saskatchewan, Saskatoon, SK, Canada

on 15 June 2017, right after the 2017 Atmospheric Limb Workshop.

Registration for the TUNER meeting is possible via the Limb Workshop website:

http://limb2017.usask.ca/tuner-meeting.php

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

Impact of typhoons on the composition of the upper troposphere within the Asian summer monsoon anticyclone: the SWOP campaign in Lhasa 2013. By D. Li et al. in Atmospheric Chemistry and Physics.

Changing trends and emissions of hydrochlorofluorocarbons (HCFCs) and their hydrofluorocarbon (HFCs) replacements. By P.G. Simmonds et al. in Atmospheric Chemistry and Physics.

Assessment of the ERA-Interim reanalysis winds using high-altitude stratospheric balloons. By F. Duruisseau et al. in the Journal of Atmospheric Sciences.

On the compensation between cloud feedback and cloud adjustment in climate models. By E.-S. Chung and B.J. Soden in Climate Dynamics.

Dynamics of the Disrupted 2015-16 Quasi-Biennial Oscillation. By L. Coy et al. in the Journal of Climate.

Wave events: climatology, trends, and relationship to Northern Hemisphere winter blocking and weather extremes. By P. Martineau et al. in the Journal of Climate.

A comprehensive overview of the climatological composition of the Asian summer monsoon anticyclone based on 10 years of Aura Microwave Limb Sounder measurements. By M.L. Santee et al. in the Journal of Geophysical Research: Atmospheres.

Reproducibility of total ozone column monitoring by the Arosa Brewer spectrophotometer triad. By R. Stübi et al. in the Journal of Geophysical Research: Atmospheres.

The Influence of Atmospheric Cloud Radiative Effects on the Large-Scale Stratospheric Circulation. By Y. Li et al. in the Journal of Climate.

Spiral Gravity Waves Radiating From Tropical Cyclones. By D.S. Nolan and J.A. Zhang in Geophysical Research Letters.

The Balanced Radiative Effect of Tropical Anvil Clouds. By D.L. Hartmann and S.E. Berry in the Journal of Geophysical Research: Atmospheres.

Adaptive covariance relaxation methods for ensemble data assimilation: Experiments in the real atmosphere. By S. Kotsuki et al. in the Quarterly Journal of the Royal Meteorological Society.

Using the moist static energy budget to understand storm track shifts across a range of timescales. By P. Barpanda and T.A. Shaw in the Journal of Atmospheric Sciences.

Lidar observations of stratospheric gravity waves from 2011 to 2015 at McMurdo (77.84° S, 166.69° E), Antarctica: Part I. Vertical wavelengths, periods, and frequency and vertical wavenumber spectra. By J. Zhao et al. in the Journal of Geophysical Research: Atmospheres.

Discussion papers – open for comment

Diagnosing the radiative and chemical contributions to future changes in tropical column ozone with the UM-UKCA chemistry-climate model. By J. Keeble et al. in Atmospheric Chemistry and Physics Discussions.

Climatology and Interannual Variability of Dynamic Variables in Multiple Reanalyses Evaluated by the SPARC Reanalysis Intercomparison Project (S-RIP). By C.S. Long et al. in Atmospheric Chemistry and Physics Discussions.

Mountain waves modulate the water vapor distribution in the UTLS. By R. Heller et al. in Atmospheric Chemistry and Physics Discussions.

In a comprehensive review, the SPARC Data Initiative team assessed stratospheric trace gas and aerosol climatologies from satellite limb sounders.

Find the SPARC Report No. 8 edited by the SPARC Data Initiative team at

http://www.aparc-climate.org/publications/sparc-reports/sparc-report-no8/.

Abstract submission deadline: 15 May 2017

The Copernicus Climate Change Service is holding the 5th International Conference on Reanalysis (ICR5) over five days, 13 – 17 November 2017 in Rome, Italy.

ICR5 will provide the opportunity to review progress and discuss future plans in key areas, including:

• Status of current production systems
• Observation rescue activities
• Developments in observational databases
• Developments in data assimilation
• Applications, user requirements and feedback
• Plans for future reanalyses

The conference will be organized around five main topics:

• Status and plans for future reanalyses
  Global and regional production, inclusive of all WCRP thematic areas: atmosphere, land, ocean and cryosphere – Session organizers: Mike Bosilovich (NASA GMAO), Shinya Kobayashi (JMA), Simona Masina (CMCC)
• Observations for reanalyses
  Preparation, organization in large archives, data rescue, reanalysis feedback – Session organizers: Marie Doutriaux-Boucher (EUMETSAT), Pierre-Philippe Mathieu (ESA), Nick Rayner (Met Office)
• Methods for reanalyses
  Data assimilation, Earth-system coupling, uncertainty estimation, challenges specific to regional reanalyses – Session organizers: Magdalena Alonso-Balmaseda (ECMWF), Gil Compo (CU/CIRES & NOAA), Dick Dee (C3S), Zhiquan Liu (NCAR & CMA)
• Evaluation of reanalyses
  Comparisons with observations, other types of analysis and models, inter-comparisons, diagnostics – Session organizers: Franco Desiato (ISPRA), Masatomo Fujiwara (Hokkaido University), Sonia Seneviratne (ETH), Adrian Simmons (ECMWF)
• Applications of reanalyses
  Generating time-series of Essential Climate Variables for climate monitoring, validation of third-party products, environmental planning and policies, adaptation and mitigation policies, climate services, industry, scientific research and education, other applications – Session organizers: Andrea Kaiser-Weiss (DWD), Carolin Richter (WMO), Michel Rixen (WCRP), Jean-Noël Thépaut (C3S)

Interested contributors are invited to submit an abstract, specifying the topic of the contribution, whether they would prefer an oral or poster presentation, and if they would like to apply to receive travel support.

Find more details on the website.

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

Characterization of the long-term radiosonde temperature biases in the upper troposphere and lower stratosphere using COSMIC and Metop-A/GRAS data from 2006 to 2014. By S.-P. Ho et al. in Atmospheric Chemistry and Physics.

Influence of high-latitude atmospheric circulation changes on summertime Arctic sea ice. By Q. Ding et al. in Nature Climate Change.

On the role of ozone feedback in the ENSO amplitude response under global warming. By P.J. Nowack et al. in Geophysical Research Letters.

Model moist bias in the middle and upper troposphere during DEEPWAVE. By Y. Yang et al. in Atmospheric Science Letters.

Discussion papers – open for comment

Sub 500 nm refractory carbonaceous particles in the polar stratosphere. By K. Schütze et al. in Atmospheric Chemistry and Physics Discussions.

Coupled Chemistry-Climate Effects from 2050 Projected Aviation Emissions. By A. Gettelman et al. in Atmospheric Chemistry and Physics Discussions.

A Raman lidar at Maïdo Observatory (Reunion Island) to measure water vapor in the troposphere and lower stratosphere: calibration and validation. By H. Vérèmes et al. in Atmospheric Measurement Techniques Discussions.

Vertical distributions of N₂O isotopocules in the equatorial stratosphere. By S. Toyoda et al. in Atmospheric Chemistry and Physics Discussions.

Call for sessions close: 30 April 2017

The Australian Meteorological and Oceanographic Society (AMOS) and
the American Meteorological Society (AMS)

AMOS-ICSHMO 2018

UNSW Kensington Campus, Sydney, Australia
Monday 5th to Friday 9th February 2018

Call for sessions

The convenors of the joint AMOS annual meeting and ICSHMO biennial meeting are calling for expressions of interest from people wishing to organise high quality sessions. The overall theme of the conference is “Earth System Science and Services”. Sessions may be in line with this theme or cover any topic relevant to Southern Hemispheric oceanography and meteorology, including areas such as:

1) Oceanographic processes and observations
2) Atmospheric processes
3) Climate
4) Weather
5) Land surface processes
6) Cryosphere
7) Climate services and Community engagement

If you are interested in convening a session please email the following information to cf2018@amos.org.au by 30 April 2017:

(a) session title
(b) session description (150 words)
(c) the main theme of the session proposal as per the numerated list above
(d) name and email address of lead session convenor
(e) name and email address of co-convenors

Key dates

Call for sessions open: April 3rd
Call for sessions close: April 30th

Abstract submission and registration open: June 12th
Abstract submission close: August 31st
Abstract acceptance notification: October 2nd

End of early bird registration: October 30th