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Gordon Research Conference on Climate Engineering

Climate engineering, also called geoengineering, is the idea of deliberately intervening in Earth’s global radiation budget with the goal of reducing some of the risks of accumulating greenhouse gases. The two most frequently discussed possibilities are injecting aerosols into the stratosphere or adding aerosols to low marine clouds, both of which would reflect more sunlight to space; other possibilities include artificially thinning cirrus cloud cover to increasing outgoing longwave radiation. This conference will focus on the scientific questions associated with this set of technologies with the goal of fostering a better understanding of their efficacy and risks.

Conference organisers are David Keith and Alan Robock.

The conference will be held on 23-28 July 2017 at Sunday River Newry, ME, USA. Note that applications for this meeting must be submitted by 25 June 2017.

Find website.

Gordon conference have been held since the 1930s, are among the most prestigious general series of scientific conferences. The Gordon organization now has more than 200 conferences a year. The conferences are primarily US-based though they often get a global audience, and now the locations are gradually extending globally. The hallmark of the conferences is that they bring together a relatively small group of people, typically about 150, in an informal and isolated setting. The conferences feature a small number of long talks with extended time for questions by speakers who are typically leaders in the field and open-ended poster sessions at which all participate. There is a substantial amount of unscheduled time each day which allows unstructured interaction between participants. The conferences often help to define a scientific field. Once established they often continue for decades with conference chair people selected by a vote of the participants. The conferences operate under the "Chatham House Rule," free discussion with no attribution and limited press.

SPARC Science Update: 13-19 May

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

The semiannual oscillation of the tropical zonal wind in the middle atmosphere derived from satellite geopotential height retrievals. By A.K. Smith et al. in the Journal of the Atmospheric Sciences.

Local wave activity budgets of the wintertime Northern Hemisphere: Implication for the Pacific and Atlantic storm tracks. By C.S.Y. Huang and N. Nakamura in Geophysical Research Letters.

Trace gas composition in the Asian summer monsoon anticyclone: a case study based on aircraft observations and model simulations. By K.-D. Gottschaldt et al. in Atmospheric Chemistry and Physics.

The robustness of future changes in Northern Hemisphere blocking: a large ensemble projection with multiple sea surface temperature patterns. By M. Matsueda and H. Endo in Geophysical Research Letters.

In Retrospect: Half a century of robust climate models. By P. Forster in Nature.

Do differences in future sulfate emission pathways matter for near-term climate? A case study for the Asian monsoon. By R.E. Bartlett et al. in Climate Dynamics.

Enhanced stratospheric water vapor over the summertime continental United States and the role of overshooting convection. By R.L. Herman et al. in Atmospheric Chemistry and Physics.

The Impact on the Ozone Layer from NOx Produced by Terrestrial Gamma-ray Flashes. By E.S. Cramer et al. in Geophysical Research Letters.

Discussion papers – open for comment

Impacts of Stratospheric Sulfate Geoengineering on Tropospheric Ozone. By L. Xia et al. in Atmospheric Chemistry and Physics Discussions.

Equatorward dispersion of high-latitude volcanic plume and its relation to the Asian summer monsoon: a case study of the Sarychev eruption in 2009. By X. Wu et al. in Atmospheric Chemistry and Physics Discussions.

Tropospheric Ozone Assessment: open comment period

The Tropospheric Ozone Assessment Report (TOAR) is a current IGAC activity with a mission to provide the research community with an up-to-date scientific assessment of tropospheric ozone’s global distribution and trends from the surface to the tropopause.

Guided by this mission, TOAR has two goals:

  1. Produce the first tropospheric ozone assessment report using all available surface observations and based on the peer-reviewed literature and new analyses.
  2. Generate easily accessible, documented data on ozone exposure and dose metrics at hundreds of measurement sites around the world (urban and non-urban), freely accessible for research on the global-scale impact of ozone on climate, human health and crop/ecosystem productivity.

The report is being written as a series of eight stand-alone publications to be submitted for peer-review to Elementa: Science of the Anthropocene, an open-access, non-profit science journal founded by five US research Universities and published by University of California Press. As the papers become available each will be posted to the TOAR comment webpage for a 30-day open comment period. We invite members of the atmospheric and biological sciences communities as well as the general public to read the papers and provide comments if they wish to do so.

Two new TOAR papers are now available for open comment:

Tropospheric Ozone Assessment Report: Present day ozone distribution and trends relevant to human health
Chapter Writing Team: Zoë L. Fleming, Ruth M. Doherty, Erika von Schneidemesser, Christopher S. Malley, Owen. R Cooper, Joseph P. Pinto, Xiaobin Xu, Augustin Colette, David Simpson, Martin G. Schultz, Samera Hamad, Allen S. Lefohn, Raeesa Moolla, Sverre Solberg, Zhaozhong Feng

Tropospheric Ozone Assessment Report: Assessment of global-scale model performance for global and regional ozone distributions, variability, and trends
Chapter Writing Team: P. J. Young, V. Naik, A. M. Fiore, A. Gaudel, J. Guo, M. Y. Lin, J. Neu, D. D. Parrish, H. E. Rieder, J. L. Schnell, S. Tilmes, O. Wild, L. Zhang, J. Brandt, A. Delcloo, R. M. Doherty, C. Geels, M. I. Hegglin, L. Hu, U. Im, R. Kumar, A. Luhar, L. Murray, D. Plummer, J. Rodriguez, A. Saiz-Lopez, M. G. Schultz, M. Woodhouse, G. Zeng, and J. Ziemke

SPARC Science Update: 6-12 May

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

The radiative role of ozone and water vapour in the annual temperature cycle in the tropical tropopause layer. By A. Ming et al. in Atmospheric Chemistry and Physics.

The Climate-system Historical Forecast Project: providing open access to seasonal forecast ensembles from centers around the globe. By A.M. Tompkins et al. in the Bulletin of the American Meteorological Society.

Discussion papers – open for comment

An island in the stratosphere – On the enhanced annual variation of water vapour in the middle and upper stratosphere in the southern tropics and subtropics. By S. Lossow et al. in Atmospheric Chemistry and Physics Discussions.

Analyzing trace gas filaments in the Ex-UTLS by 4D-variational assimilation of airborne tomographic retrievals. By A. Vogel et al. in Atmospheric Chemistry and Physics Discussions.

The US Dobson Station Network Data Record Prior to 2015, Re-evaluation of NDACC and WOUDC archived records with WinDobson processing software. By R.D. Evans et al. in Atmospheric Chemistry and Physics Discussions.

SPARC Science Update: 15 April – 5 May

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.

First announcement: Joint SPARC Dynamics & Observations Workshop (QBOi, FISAPS & SATIO-TCS) in Kyoto, Japan – 9-14 Oct 2017

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.

Survey: User requirements for future reanalysis data products

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’

WCRP Director David Carlson resigns

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.

First working meeting of the emerging SPARC activity “Towards Unified Error Reporting” (TUNER) in Saskatoon, SK, Canada – 15 June 2017

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

SPARC Science Update: 8-14 April

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.