Characteristics of gravity waves resolved by ECMWF. By P. Presusse et al. in Atmospheric Chemistry and Physics.

Seasonal to decadal prediction of the winter North Atlantic Oscillation: emerging capability and future prospects. By D.M. Smith et al. in the Quaterly Journal of the Royal Meteorological Society.

Construction of merged satellite total O₃ and NO₂ time series in the tropics for trend studies and evaluation by comparison to NDACC SAOZ measurements. By M. Pastel et al. in Atmospheric Measurement Techniques.

The AquaVIT-1 intercomparison of atmospheric water vapor measurement techniques. By D.W. Fahey et al. in Atmospheric Measurement Techniques.

Sensitivity of the Amundsen Sea Low to Stratospheric Ozone Depletion. By R.L. Fogt and E.A. Zbacnik in the Journal of Climate.

Representation errors and retrievals in linear and nonlinear data assimilation. By P. J. van Leeuwen in the Quarterly Journal of the Royal Meteorological Society.

How sensitive is the recovery of stratospheric ozone to changes in concentrations of very short-lived bromocarbons? By X. Yang et al in Atmospheric Chemistry and Physics.

An Emerging Precursor Signal in the Stratosphere in Recent Decades for the Indian Summer Monsoon Onset. By R. Ren and J. Hu in Geophysical Research Letters.

Atmospheric circulation as a source of uncertainty in climate change projections. By T.G. Shepherd in Nature: Geoscience.

How stratospheric are deep stratospheric intrusions? By T. Trickl et al. in Atmospheric Chemistry and Physics.

Quality assessment of ozone total column amounts as monitored by ground-based solar absorption spectrometry in the near infrared (> 3000.cm⁻¹). By O. E. García et al. in Atmospheric Measurement Techniques.

Large-eddy simulations of Hector the convector making the stratosphere wetter. By T. Dauhut et al. in Atmospheric Science letters.

Trends of ozone total columns and vertical distribution from FTIR observations at 8 NDACC stations around the globe. By C. Vigouroux et al. in Atmospheric Chemistry and Physics Discussions.

Joachim (Jo) Urban, a leading expert in microwave and sub-mm atmospheric observations working at the Swedish Chalmers University in Gothenburg unexpectedly died on 14 August 2014.

Find obituary by Mark Weber, John P. Burrows, Harry Küllman, and Donal Murtagh.

13-19 September

The role of convective overshooting clouds in tropical stratosphere–troposphere dynamical coupling. By K. Kodera et al. in Atmospheric Chemistry and Physics Discussions.

GOME-2 total ozone columns from MetOp-A/MetOp-B and assimilation in the MACC system. By N. Hao et al. in Atmospheric Measurement Techniques.

SO₂ photolysis as a source for sulfur mass-independent isotope signatures in stratospheric aerosols. By A.R. Whitehill et al. in Atmospheric Chemistry and Physics Discussions.

Analysing time-varying trends in stratospheric ozone time series using the state space approach. By M. Laine et al. in Atmospheric Chemistry and Physics.

Constraining the N₂O₅ UV absorption cross section from spectroscopic trace gas measurements in the tropical mid-stratosphere. By L. Kritten et al. in Atmospheric Chemistry and Physics.

Simulation of the isotopic composition of stratospheric water vapour – Part 1: Description and evaluation of the EMAC model. By R. Eichinger et al. in Atmospheric Chemistry and Physics Discussions.

Methane as a diagnostic tracer of changes in the net circulation of the middle atmosphere. By E.E. Remsberg in Atmospheric Chemistry and Physics Discussions.

A Future Earth Executive Director is being sought to provide executive leadership for the Future Earth programme.

The Executive Director will head a new globally distributed secretariat, recently announced by the Science and Technology Alliance for Global Sustainability following an open competition, and will work closely with the scientific community, stakeholders, and members of the Future Earth governance structure.

Further information on the role, required skills and experience, and information on how to apply can be found on the Future Earth website.

The closing date for applications is Monday 13th October 2014, 17:00 CEST.

The WCRP/EUMETSAT Symposium on Climate Research and Earth Observations from Space is still open for registration.

This major conference is taking place on 13-17 October in Darmstadt, Germany.

Find registration tool on Conference Website.

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

Advanced stratospheric data processing of radio occultation with a variational combination for multi-frequency GNSS signals. By T.-K. Wee and Y.-H. Kuo in the Journal of Geophysical Research: Atmospheres.

Processes controlling water vapor in the upper troposphere / lowermost stratosphere: An analysis of eight years of monthly measurements by the IAGOS-CARIBIC observatory. By A. Zahn et al. in the Journal of Geophysical Research: Atmospheres.

Effect of the Arakan Mountains in the Northwestern Indochina Peninsula on the Late-May Asian Monsoon Transition. By C.-H. Wu et al. in the Journal of Geophysical Research: Atmospheres.

Stratospheric and mesospheric HO₂ observations from the Aura Microwave Limb Sounder. By L. Millán et al. in Atmospheric Chemistry and Physics Discussions.

An evaluation of ozone dry deposition in global scale chemistry climate models. By C. Hardacre et al in Atmospheric Chemistry and Physics Discussions.

Global emissions of HFC-143a (CH₃CF₃) and HFC-32 (CH2F2) from in situ and air archive atmospheric observations. By S. O’Doherty et al. in Atmospheric Chemistry and Physics.

Changes in the composition of the northern polar upper stratosphere in February 2009 after a sudden stratospheric warming. By A. Damiani et al. in the Journal of Geophysical Research: Atmospheres.

Observational evidence for interhemispheric hydroxyl-radical parity. By P. Patra et al. in Nature.

Atmospheric chemistry: No equatorial divide for a cleansing radical. By A.M. Fiore in Nature.

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

Vertical structure of stratospheric water vapour trends derived from merged satellite data. By M.I. Hegglin et al. in Nature: Geoscience.

Stratospheric sudden warmings in an idealized GCM. By M. Jucker et al. in the Journal of Geophysical Research: Atmospheres.

Validation of the Aura High Resolution Dynamics Limb Sounder geopotential heights. By L.L. Smith and J.C. Gille in Atmospheric Measurement Techniques.

First quasi-Lagrangian in-situ measurements of Antarctic Polar springtime ozone: observed ozone loss rates from the Concordiasi long-duration balloon campaign. By R. Schofield et al. in Atmospheric Chemistry and Physics Discussions.

Assessment of the accuracy of (re)analyses in the equatorial lower stratosphere. By A. Podglajen et al. in the Journal of Geophysical Research: Atmospheres.

Evidence of Mixing Between Polluted Convective Outflow and Stratospheric Air in the Upper Troposphere during DC3. By J.R. Schroeder et al. in the Journal of Geophysical Research: Atmospheres.

Microphysical, radiative and dynamical impacts of thin cirrus clouds on humidity in the tropical tropopause layer and lower stratosphere. By T. Dinh and S. Fueglistaler in Geophysical Research Letters.

Migrations and dynamics of the intertropical convergence zone. By T. Schneider et al. in Nature.

Observation and a numerical study of gravity waves during tropical cyclone Ivan (2008). By F. Chane Ming et al. in Atmospheric Chemistry and Physics Discussions.

The conveners

Jan Keller (Hans-Ertel-Centre for Weather Research, Germany)

Sean Davis (NOAA, CIRES, USA)

Christian Ohlwein (University of Bonn, Germany)

Masatomo Fujiwara (Hokkaido University, Japan)

cordially invite you to submit an abstract before 6 August to the 2014 AGU Fall Meeting session on:

Reanalysis: Evaluation and Intercomparison (NGO015)

The session welcomes contributions on the evaluation of reanalyses,

including global, regional, atmospheric, ocean, land-surface and coupled

reanalyses. In particular, we encourage submissions on the

intercomparison of multiple reanalyses and comparisons with independent

(non-assimilated) data.

Invited speakers

Gil Compo (NOAA, ESRL, Boulder)

Steven Pawson (NASA, GSFC, Washington)

Frank Kaspar (German Meteorological Service, Offenbach, Germany)

Ron Gelaro (NASA, GSFC, Washington)

The AGU Fall Meeting takes place on 15-19 December 2014 in San Francisco, CA, USA.