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Study to determine Spectral Solar Irradiance and its impact on the middle atmosphere (SIMA)

English title Study to determine Spectral Solar Irradiance and its impact on the middle atmosphere (SIMA)
Applicant Rozanov Eugene V.
Number 163206
Funding scheme Project funding (Div. I-III)
Research institution Physikalisch-Meteorologisches Observatorium Davos und Weltstrahlungszentrum
Institution of higher education Physikal.-Meteorolog. Observatorium Davos - PMOD
Main discipline Climatology. Atmospherical Chemistry, Aeronomy
Start/End 01.10.2015 - 30.11.2018
Approved amount 347'657.00
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All Disciplines (2)

Discipline
Climatology. Atmospherical Chemistry, Aeronomy
Astronomy, Astrophysics and Space Sciences

Keywords (6)

middle atmosphere; modeling; solar irradiance variability; climate variability; Ozone layer; observations

Lay Summary (French)

Lead
Le but de SIMA est de determiner l'amplitude de la variation de l'irradiance solaire spectrale (ISS) au cours du cycle solaire. Nous combinerons des observations, des simulations et des informations deja connues sur l'atmosphere et sur le Soleil. Nous creerons une base de donnees de l'irradiance solaire en fonction du temps debutant en 1970, et nous simulerons les donnees pour remplir les trous dans les observations.
Lay summary

Contenu et but du projet

Les variations de l'irradiance solaire affectent notre climat. Or, puisque l'amplitude de la variation dans l'ultraviolet solaire (UVS) est incertaine, la reponse climatique est mal connue. Ce projet combinera l'utilisation de modele de chimie-climat, des observations du Soleil, la chimie, la temperature et la dynamique atmospheriques, dans un contexte statistique robuste. Ensemble, ces donnees pourront contraindre l'amplitude de la reponse du climat ainsi que celle de la variabilite solaire. Nous pourrons enfin creer une base de donnee de l'UVS qui sera utile pour les scientifiques etudiant l'interaction entre la radiation solaire et l'atmosphere terrestre.

Contexte scientifique et societal

Le projet fournira une evaluation de l'etat des connaissances actuelles sur l'influence du Soleil sur l'atmosphere et le climat. Une meilleure estimation de la temperature et de la reponse dynamique nous aidera a comprendre le couplage entre l'endroit ou l'influence du Soleil se produit et la meteo et le climat a la surface, en particulier en Amerique du Nord et en Europe, ou les effets sont plus prononces. Le projet contribuera aux objectifs de recherche de plusieurs projets internationaux.

Mots-cles

Ozone, hydroxyles, nitrates, irradiance solaire, atmosphere moyenne, modelisation numerique, observations, inference Bayesienne, dynamique.

Direct link to Lay Summary Last update: 15.10.2015

Lay Summary (English)

Lead
The goal of SIMA is to determine the magnitude of the spectral solar irradiance (SSI) changes over the solar cycle. We will combine observations, simulations and prior information about the atmosphere and Sun. We will create a time-resolved solar irradiance database back to the 1970s, and will bridge past and future gaps in the observations.
Lay summary

The content and aim of the research project

Solar irradiance changes affect our climate. But, the magnitude of the solar ultraviolet (SUV) variability has a large uncertainty, and so the size and spatial extent of the climate response is poorly constrained. This project will combine a state-of-the-art chemistry-climate model, observations of the Sun, atmospheric chemistry, temperature and dynamics, within a powerful statistical framework. Together, these will self-constrain the response that can be induced in the terrestrial atmosphere, and how much the SSI can vary. We will then create a time-resolved SUV dataset, with uncertainties, providing valuable information for scientists investigating the interaction of solar radiation with the Earth's atmosphere.

Scientific and societal context of the research project

The project will give a full appraisal of the current state of knowledge regarding solar influences on atmosphere and climate. A better estimate of the temperature and dynamical response will help us understand the coupling between the where solar influence begins high up, and our weather and climate near the surface, particularly over North America and Europe, where the effect is most pronounced. The project will contribute to the research goals of several international projects.

Keywords

Ozone, hydroxyls, nitrates, solar irradiance, middle atmosphere, numerical modeling, observations, Bayesian inference, dynamics.

Direct link to Lay Summary Last update: 15.10.2015

Responsible applicant and co-applicants

Employees

Publications

Publication
Inconsistencies between chemistry–climate models and observed lower stratospheric ozone trends since 1998
BallWilliam, ChiodoGabriel, AbalosMarta, AlsingJustin, StenkeAndrea (2020), Inconsistencies between chemistry–climate models and observed lower stratospheric ozone trends since 1998, in ACP, 20, 9737-9752.
Stratospheric ozone trends for 1985–2018: sensitivity to recent large variability
BallWilliam, AlsingJustin, StaehelinJohannes, DavisSean, LucienFroidevaux, PeterThomas (2019), Stratospheric ozone trends for 1985–2018: sensitivity to recent large variability, in ACP, 19, 12731-12748.
The upper stratospheric solar cycle ozone response
Ball W. T., Rozanov E., Alsing J., Marsh D. R., Tummon F., Mortlock D. J., Kinnison D. E., Haigh J. D. (2019), The upper stratospheric solar cycle ozone response, in Geophysical Research Letters.
Contributions of Natural and Anthropogenic Forcing Agents to the Early 20th Century Warming
Egorova Tatiana, Rozanov Eugene, Arsenovic Pavle, Peter Thomas, Schmutz Werner (2018), Contributions of Natural and Anthropogenic Forcing Agents to the Early 20th Century Warming, in Frontiers in Earth Science, 6, 1-8.
Revised historical solar irradiance forcing
Egorova T., Schmutz W., Rozanov E., Shapiro A. I., Usoskin I., Beer J., Tagirov R. V., Peter T. (2018), Revised historical solar irradiance forcing, in Astronomy & Astrophysics, 615, A85-A85.
The Response of the Ozone Layer to Quadrupled CO 2 Concentrations
Chiodo G., Polvani L. M., Marsh D. R., Stenke A., Ball W., Rozanov E., Muthers S., Tsigaridis K. (2018), The Response of the Ozone Layer to Quadrupled CO 2 Concentrations, in Journal of Climate, 31(10), 3893-3907.
Tropospheric jet response to Antarctic ozone depletion: An update with Chemistry-Climate Model Initiative (CCMI) models
Son Seok-Woo, Han Bo-Reum, Garfinkel Chaim I, Kim Seo-Yeon, Park Rokjin, Abraham N Luke, Akiyoshi Hideharu, Archibald Alexander T, Butchart N, Chipperfield Martyn P, Dameris Martin, Deushi Makoto, Dhomse Sandip S, Hardiman Steven C, Jöckel Patrick, Kinnison Douglas, Michou Martine, Morgenstern Olaf, O’Connor Fiona M, Oman Luke D, Plummer David A, Pozzer Andrea, Revell Laura E, Rozanov Eugene, et al. (2018), Tropospheric jet response to Antarctic ozone depletion: An update with Chemistry-Climate Model Initiative (CCMI) models, in Environmental Research Letters, 13(5), 054024-054024.
Multi-model comparison of the volcanic sulfate deposition from the 1815 eruption of Mt. Tambora
Marshall Lauren, Schmidt Anja, Toohey Matthew, Carslaw Ken S., Mann Graham W., Sigl Michael, Khodri Myriam, Timmreck Claudia, Zanchettin Davide, Ball William T., Bekki Slimane, Brooke James S. A., Dhomse Sandip, Johnson Colin, Lamarque Jean-Francois, LeGrande Allegra N., Mills Michael J., Niemeier Ulrike, Pope James O., Poulain Virginie, Robock Alan, Rozanov Eugene, Stenke Andrea, Sukhodolov Timofei, et al. (2018), Multi-model comparison of the volcanic sulfate deposition from the 1815 eruption of Mt. Tambora, in Atmospheric Chemistry and Physics, 18(3), 2307-2328.
Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery
Ball William T., Alsing Justin, Mortlock Daniel J., Staehelin Johannes, Haigh Joanna D., Peter Thomas, Tummon Fiona, Stübi Rene, Stenke Andrea, Anderson John, Bourassa Adam, Davis Sean M., Degenstein Doug, Frith Stacey, Froidevaux Lucien, Roth Chris, Sofieva Viktoria, Wang Ray, Wild Jeannette, Yu Pengfei, Ziemke Jerald R., Rozanov Eugene V. (2018), Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery, in Atmospheric Chemistry and Physics, 18(2), 1379-1394.
Atmospheric impacts of the strongest known solar particle storm of 775 AD
Sukhodolov Timofei, Usoskin Ilya, Rozanov Eugene, Asvestari Eleanna, Ball William T., Curran Mark A. J., Fischer Hubertus, Kovaltsov Gennady, Miyake Fusa, Peter Thomas, Plummer Christopher, Schmutz Werner, Severi Mirko, Traversi Rita (2017), Atmospheric impacts of the strongest known solar particle storm of 775 AD, in Scientific Reports, 7(1), 45257-45257.
Reconciling differences in stratospheric ozone composites
Ball William T., Alsing Justin, Mortlock Daniel J., Rozanov Eugene V., Tummon Fiona, Haigh Joanna D. (2017), Reconciling differences in stratospheric ozone composites, in Atmospheric Chemistry and Physics, 17(20), 12269-12302.
On the aliasing of the solar cycle in the lower stratospheric tropical temperature
Kuchar Ales, Ball William T., Rozanov Eugene V., Stenke Andrea, Revell Laura, Miksovsky Jiri, Pisoft Petr, Peter Thomas (2017), On the aliasing of the solar cycle in the lower stratospheric tropical temperature, in Journal of Geophysical Research: Atmospheres, 122(17), 9076-9093.
HEPPA-II model–measurement intercomparison project: EPP indirect effects during the dynamically perturbed NH winter 2008–2009
Funke Bernd, Ball William, Bender Stefan, Gardini Angela, Harvey V. Lynn, Lambert Alyn, López-Puertas Manuel, Marsh Daniel R., Meraner Katharina, Nieder Holger, Päivärinta Sanna-Mari, Pérot Kristell, Randall Cora E., Reddmann Thomas, Rozanov Eugene, Schmidt Hauke, Seppälä Annika, Sinnhuber Miriam, Sukhodolov Timofei, Stiller Gabriele P., Tsvetkova Natalia D., Verronen Pekka T., Versick Stefan, von Clarmann Thomas, et al. (2017), HEPPA-II model–measurement intercomparison project: EPP indirect effects during the dynamically perturbed NH winter 2008–2009, in Atmospheric Chemistry and Physics, 17(5), 3573-3604.
Modeling of the middle atmosphere response to 27-day solar irradiance variability
Sukhodolov Timofei, Rozanov Eugene, Ball William T., Peter Thomas, Schmutz Werner (2017), Modeling of the middle atmosphere response to 27-day solar irradiance variability, in Journal of Atmospheric and Solar-Terrestrial Physics, 152-153, 50-61.
An upper-branch Brewer–Dobson circulation index for attribution of stratospheric variability and improved ozone and temperature trend analysis
Ball William T., Kuchař Aleš, Rozanov Eugene V., Staehelin Johannes, Tummon Fiona, Smith Anne K., Sukhodolov Timofei, Stenke Andrea, Revell Laura, Coulon Ancelin, Schmutz Werner, Peter Thomas (2016), An upper-branch Brewer–Dobson circulation index for attribution of stratospheric variability and improved ozone and temperature trend analysis, in Atmospheric Chemistry and Physics, 16(24), 15485-15500.
The role of methane in projections of 21st century stratospheric water vapour
Revell Laura E., Stenke Andrea, Rozanov Eugene, Ball William, Lossow Stefan, Peter Thomas (2016), The role of methane in projections of 21st century stratospheric water vapour, in Atmospheric Chemistry and Physics, 16(20), 13067-13080.
Assessing the beginning to end-of-mission sensitivity change of the PREcision MOnitor Sensor total solar irradiance radiometer (PREMOS/PICARD)
Ball William, Schmutz Werner, Fehlmann Andre, Finsterle Wolfgang, Walter Benjamin (2016), Assessing the beginning to end-of-mission sensitivity change of the PREcision MOnitor Sensor total solar irradiance radiometer (PREMOS/PICARD), in Journal of Space Weather and Space Climate, 6, A32.
High solar cycle spectral variations inconsistent with stratospheric ozone observations
Ball W. T., Haigh J. D., Rozanov E. V., Kuchar A., Sukhodolov T., Tummon F., Shapiro A. V., Schmutz W. (2016), High solar cycle spectral variations inconsistent with stratospheric ozone observations, in Nature Geoscience, 9(3), 206-209.
The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP): experimental design and forcing \hack{\newline} input data for CMIP6
Zanchettin D., Khodri M., Timmreck C., Toohey M., Schmidt A., Gerber E. P., Hegerl G., Robock A., Pausata F. S. R., Ball W. T., Bauer S. E., Bekki S., Dhomse S. S., LeGrande A. N., Mann G. W., Marshall L., Mills M., Marchand M., Niemeier U., Poulain V., Rozanov E., Rubino A., Stenke A., Tsigaridis K., Tummon F. (2016), The Model Intercomparison Project on the climatic response to Volcanic forcing (VolMIP): experimental design and forcing \hack{\newline} input data for CMIP6, in Geoscientific Model Development, 9(8), 2701-2719.

Datasets

BASIC Composite Ozone Time-Series Data version 1

Author Alsing, Justin; Ball, William
Publication date 05.09.2017
Persistent Identifier (PID) 10.17632/2mgx2xzzpk.1
Repository Mendeley Data
Abstract
BAyeSian Integrated and Consolidated (BASIC) composite ozone time-series dataset built from a Bayesian joint self-calibration analysis of multiple composite ozone datasets. The construction of the BASIC composite is described in detail in the paper:Ball et al, Reconciling differences in stratospheric ozone composites, ACP (2017).If you use the BASIC dataset, please cite both the DOI for this data page and Ball et al 2017 (ACP).The netCDF file includes variables for time, pressure and latitude giving the Julian dates* and pressure and latitude grid respectively. The ozone time-series data is given in the variable o3[time, pressure, latitude] and associated (time-varying) 1-sigma uncertainties are given in sigma_o3[time, pressure, latitude].Version 1 of the BASIC ozone composite is built from SWOOSH v2.6, GOZCARDS v1.0, SBUV-MOD v8.6 and SBUV-MER as described in Tummon et al 2015.

BASIC Composite Ozone Time-Series Data version 2

Author Alsing, Justin; Ball, William
Publication date 12.12.2017
Persistent Identifier (PID) 10.17632/2mgx2xzzpk.2
Repository Mendeley Data
Abstract
BAyeSian Integrated and Consolidated (BASIC) composite ozone time-series dataset built from a Bayesian joint self-calibration analysis of multiple composite ozone datasets. The construction of the BASIC composite is described in detail in the paper:Ball et al, Reconciling differences in stratospheric ozone composites, ACP (2017).If you use the BASIC dataset, please cite both the DOI for this data page and Ball et al 2017 (ACP).The netCDF file includes variables for time, pressure and latitude giving the Julian dates* and pressure and latitude grid respectively. The ozone time-series data is given in the variable o3[time, pressure, latitude] and associated (time-varying) 1-sigma uncertainties are given in sigma_o3[time, pressure, latitude].BASIC_V1_swooshV2.6_gozcardsV1.0_sbuvmodV8.6_sbuvmer.nc is built from SWOOSH v2.6, GOZCARDS v1.0, SBUV-MOD v8.6 and SBUV-MER (as described in Tummon et al 2015). This corresponds to the BASIC composite presented in Ball et al 2017 (ACP); the data runs up until Dec 2012.BASIC_V1_swooshV2.6_gozcardsV2.20.nc is built from SWOOSH v2.6 and GOZCARDS v2.20; the updated data runs up until Dec 2016. This data was used in the revised version of Ball et al, Continuous decline in lower stratospheric ozone offsets ozone layer recovery, 2017 (ACPD) (referred to as merged-swoosh/gozcards in that paper).

BASIC Composite Ozone Time-Series Data version 3

Author Alsing, Justin; Ball, William
Publication date 05.09.2019
Persistent Identifier (PID) http://dx.doi.org/10.17632/2mgx2xzzpk.3
Repository Mendeley Data
Abstract
BAyeSian Integrated and Consolidated (BASIC) composite ozone time-series dataset built from a Bayesian joint self-calibration analysis of multiple composite ozone datasets. The construction of the BASIC composite is described in detail in the paper:Ball et al, Reconciling differences in stratospheric ozone composites, ACP (2017).If you use the BASIC dataset, please cite both the DOI for this data page and Ball et al 2017 (ACP). The netCDF file includes variables for time, pressure and latitude giving the Julian dates* and pressure and latitude grid respectively. The ozone time-series data is given in the variable o3[time, pressure, latitude] and associated (time-varying) 1-sigma uncertainties are given in sigma_o3[time, pressure, latitude].BASIC_V1_swooshV2.6_gozcardsV1.0_sbuvmodV8.6_sbuvmer.nc is built from SWOOSH v2.6, GOZCARDS v1.0, SBUV-MOD v8.6 and SBUV-MER (as described in Tummon et al 2015). This corresponds to the BASIC composite presented in Ball et al 2017 (ACP); the data runs up until Dec 2012.BASIC_V1_swooshV2.6_gozcardsV2.20.nc is built from SWOOSH v2.6 and GOZCARDS v2.20; the updated data runs up until Dec 2018. This data was used in the revised version of Ball et al, Continuous decline in lower stratospheric ozone offsets ozone layer recovery, 2017 (ACPD) (referred to as merged-swoosh/gozcards in that paper). *00:00:00.0 on 1/1/1980=2444239.5

Collaboration

Group / person Country
Types of collaboration
Imperial College London Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Université d'Orléans France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Belgian Institute for Space Aeronomy Belgium (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
ETH Zurich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Seminar Individual talk Negative ozone trends in the lower stratosphere: current understanding and open questions 12.11.2018 UEA, UK, Great Britain and Northern Ireland Ball William;
Solar Activity, Magnetism & Irradiance Talk given at a conference The Sun and Climate 16.10.2018 Max Planck for Solar System Research, Goettingen, Germany Ball William;
SPARC General Assembly 2018 Talk given at a conference Evidence for a Continuous Decline in Lower Stratospheric Ozone Offsetting Ozone Layer Recovery: an update 01.10.2018 Kyoto, Japan Ball William;
Second SPARC/LOTUS Workshop Talk given at a conference Constructing a unified ozone composite: needs and outcomes 17.09.2018 WMO, Geneva, Switzerland Ball William;
Second SPARC/LOTUS Workshop Talk given at a conference Lower stratospheric trends: an update 17.09.2018 WMO, Geneva, Switzerland Ball William;
Second SPARC/LOTUS Workshop Talk given at a conference Upgrading dynamical linear modelling (DLM): fast, public code release and its capabilities 17.09.2018 WMO/Geneva, Switzerland Ball William;
International Astronomical Union Talk given at a conference Solar irradiance reconstructions relevant to climate studies 20.08.2018 Vienna, Austria Ball William;
Solar Terrestrial Physics 14 Talk given at a conference Assessing long-term changes in stratospheric ozone 09.07.2018 Toronto, Canada Ball William;
Green chemistry school 2018 Talk given at a conference Is there any danger to ozone layer recovery in the future? 07.07.2018 Venice, Italy Rozanov Eugene V.;
Seminar Individual talk Evidence for continued ozone layer reduction 08.05.2018 MISU, University of Stockholm, Sweden Ball William;
SPARC SOLARIS workshop Talk given at a conference Status of WG3 activity 23.04.2018 Karlsruhe, Germany Rozanov Eugene V.;
EGU 2018 Talk given at a conference Evidence that a continuous decline in lower stratospheric ozone is offsetting ozone layer recovery 08.04.2018 Vienna, Austria Ball William;
Seminar Individual talk Evidence for continued ozone layer reduction 23.03.2018 IAP, UniBern, Switzerland Ball William;
Seminar Individual talk Evidence for continued ozone layer depletion 05.03.2018 Imperial College London, Great Britain and Northern Ireland Ball William;
Seminar Individual talk Evidence for continued ozone layer depletion 02.03.2018 Data Science Inst., Uni Lancaster, Great Britain and Northern Ireland Ball William;
Seminar Individual talk Evidence for continued ozone layer depletion 15.01.2018 BIRA, Belgium Ball William;
SPARC 25th anniversary Talk given at a conference Evidence for continued ozone layer depletion 01.12.2017 ETH Zurich, Switzerland Ball William;
Invited seminar Individual talk Evidence for continued ozone layer depletion 28.11.2017 LATMOS & University Pierre & Marie Curie, Paris, France Ball William;
SOLARIS-HEPPA working group meeting Talk given at a conference Overview of WG3 activity 06.11.2017 Paris, France Rozanov Eugene V.;
SPARC SOLARIS-HEPPA meeting Talk given at a conference The MASSI initiative: Methodological Analysis for Solar Signal Identification (WG4 update) 06.11.2017 University Pierre & Marie Curie, Paris, France Ball William;
SWISS SCOSTEP workshop and committee meeting Talk given at a conference Can we constrain solar forcing using observed climate and total ozone change in the 20th century? 10.10.2017 Locarno, Switzerland Rozanov Eugene V.;
Solar Total and Spectral Irradiance Observations meeting, Davos Talk given at a conference Reconciling differences in stratospheric ozone composites 04.09.2017 Davos, Switzerland Ball William;
C2SM GCM User Workshop Talk given at a conference Quantifying solar forcing using atmospheric observations and models 27.06.2017 ETH Zurich, Switzerland Ball William;
SPARC/LOTUS Workshop Talk given at a conference Reconciling differences in stratospheric ozone composites 13.03.2017 LATMOS / Université Pierre et Marie Curie, France Ball William;
Invited Colloquium Individual talk Solar variability and influences on climate 06.03.2017 IAC/ETH Zurich, Switzerland Ball William;
Graubünden forscht - Young Scientists Contest Talk given at a conference High solar cycle spectral variations inconsistent with stratospheric ozone observations 14.09.2016 Davos, Switzerland Ball William;
Quadrennial Ozone Symposium 2016 Poster A new dynamical index representing short-term equatorial ozone and temperature variability 04.09.2016 Edinburgh, Great Britain and Northern Ireland Ball William;
6th International Workshop SOLARIS-HEPPA Poster Constraining solar irradiance changes using ozone: uncertainties and limitations’ 13.06.2016 Helsinki, Finland Ball William;
6th International Workshop SOLARIS-HEPPA Talk given at a conference High solar cycle spectral variations inconsistent with stratospheric ozone observations 13.06.2016 Helsinki, Finland Ball William;
Sun-Climate Symposium Talk given at a conference PREMOS TSI: comparison to other instruments and climate implications 10.11.2015 Savannah, GE, United States of America Ball William;
Sun-Climate Symposium Talk given at a conference New Results on the Stratospheric Ozone Response to Spectral Solar Irradiance Variability 10.11.2015 Savannah, GE, United States of America Ball William;
SOLARIS-HEPPA Meeting Talk given at a conference Investigating the validity of SORCE-like UV variations using ozone observations 03.11.2015 Boulder, CO, United States of America Ball William;
SOLARIS-HEPPA Meeting Talk given at a conference Comparison of SSI models: NRLSSI-1, NRLSSI-2 and SATIRE-S 03.11.2015 Boulder, CO, United States of America Ball William;


Communication with the public

Communication Title Media Place Year
Media relations: print media, online media ATMOS-FEARS Ozone layer continues to DECLINE in areas of the world, scientists find The Sun (UK) International 2018
Media relations: radio, television BBC World Service Newsday BBC World Service International 2018
Media relations: print media, online media Decreasing ozone Nature Climate Change International 2018
Media relations: print media, online media Die Ozonschicht erholt sich nicht wie erwartet NZZ (print) International 2018
Media relations: print media, online media Die Ozonschicht wird dünner Wiener Zietung International 2018
Media relations: print media, online media Disturbing losses of protective ozone near Earth’s equator may be tied to short-lived chemicals Science Magazine International 2018
Media relations: print media, online media EPFZ: la couche d'ozone peine à se rétablir RJF Western Switzerland 2018
New media (web, blogs, podcasts, news feeds etc.) Forscher der ETH Zürich erklärt das Ozonloch Nau.ch German-speaking Switzerland 2018
Media relations: print media, online media It looked as if Earth’s ozone layer was healing nicely — until now The Washington Post (print) International 2018
Media relations: print media, online media La capa de ozono sigue resquebrajándose El Pais, Spain International 2018
Media relations: print media, online media Neue Schaedliche Gase: Ozonschicht wird duenner Tages Anzeiger (print) German-speaking Switzerland 2018
Media relations: print media, online media Ozone layer declining over populated zones: study AFP International 2018
Media relations: print media, online media Ozone layer is NOT recovering over some of Earth's most highly populated areas ... Mail Online International 2018
Media relations: print media, online media Ozone layer is thinning over densely populated areas, scientists say The Times (UK) International 2018
Media relations: print media, online media Ozone Layer May Be Thinning Over Earth’s Heavily Populated Areas The Wall Street Journal International 2018
Media relations: print media, online media Ozone layer not recovering over populated areas, scientists warn Guardian International 2018
New media (web, blogs, podcasts, news feeds etc.) Ozone Shield NOT Safe Scientists Say Radio EcoShock International 2018
Media relations: radio, television Ozonschicht dünnt weiter aus tagesschau.de International 2018
Media relations: radio, television Ozonschicht wird dünner - Wir sollten beunruhigt, nicht beängstigt sein SRF Radio 4 News - Wissenschaft Magazin German-speaking Switzerland 2018
Media relations: print media, online media Rätselhafter Ozonschwund am Himmel Frankfurter Allgemeine International 2018
Media relations: radio, television Reality Check radio fm4, Austria International 2018
Media relations: radio, television Tagesschau: Ozonschicht schrumpft weiter SRF 1 Western Switzerland Italian-speaking Switzerland German-speaking Switzerland 2018
Media relations: print media, online media Wait—the Ozone Layer Is Still Declining? Scientific American International 2018

Awards

Title Year
Reviewer certificate from International Journal of Climatology 2018
Outstanding contribution in reviewing from Journal of Atmospheric and Solar-Terrestrial Physics 2017
Award for Best Presentation in the Natural Sciences section, Graubünden forscht - Young Scientists Contest, Davos, Switzerland 2016

Associated projects

Number Title Start Funding scheme
153302 Variability of Solar Irradiance and its implications on the terrestrial middle atmosphere 01.04.2014 Project funding (Div. I-III)
149182 Study of factors influencing ozone layer evolution (SILA) 01.01.2014 Project funding (Div. I-III)
182239 Past and future of the Ozone Layer Evolution (POLE) 01.01.2019 Project funding (Div. I-III)
147659 Future and Past Solar Influence on the Terrestrial Climate II 01.01.2014 Sinergia
149182 Study of factors influencing ozone layer evolution (SILA) 01.01.2014 Project funding (Div. I-III)

Abstract

SIMA is an extension of the “Study of factors influencing ozone layer evolution” (SILA) project. One of the major factors influencing ozone and the middle atmosphere are changes in spectral solar irradi-ance. On timescales longer than a few months this is still a highly uncertain quantity and, therefore, so is its impact on chemistry, temperature and dynamics in the middle atmosphere. In SIMA, we propose to simultaneously determine solar spectral irradiance (SSI) and the range of variability the Sun can induce in the atmosphere. Our objectives are:1) To develop a new technique to estimate SSI variability, and the atmospheric response to SSI, using atmospheric observations and state-of-the-art models by:a)expanding the Bayesian inference approach developed by Ball et al (2014a) to incorporate, in addition to ozone, other chemistry, temperature and dynamics;b)analysing and preparing observations of stratospheric variables and their uncertainties;c)performing multiple simulations with 2D and 3D models to quantify the atmospheric response and establish the link between SSI and atmospheric variables key to the Bayesian approach;d)evaluating SSI datasets to develop stronger priors, independently of atmospheric observations.2) We will fully appraise the level of uncertainty in observations and modelling, both of SSI and of stratospheric responses to solar variability. 3) A direct outcome will be a database of time-resolved spectral solar irradiance (SSI) for application in studies of variations in the Earth’s atmosphere, climate, and of the Sun, from 1970 to present, in-cluding, crucially, periods when direct measurements are either very poor or missing.The results will advance our understanding of solar variability, its impact on stratospheric dynamics and chemistry, and will benefit, among others: (i) climate scientists working to understand the influ-ence of solar variability on climate; (ii) climate scientists and meteorologists working on regional cli-mate variability, as well as seasonal and decadal prediction; (iii) atmospheric chemists and those re-searching the composition of the middle atmosphere; (iv) atmospheric dynamicists investigating dy-namical coupling between the stratosphere and troposphere; (v) solar physicists studying the relation-ship between the Sun's magnetic activity and its radiative output. In addition, we will also contribute to research and the goals of the international activities of WCRP SPARC SOLARIS/HEPPA and SCOSTEP VarSITI ROSMIC.
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