News Archive

12 July 2017

Inter-journal Special Issue for BACCHUS articles set up

A special issue for BACCHUS publications has been created. It summarizes publications in the open-access journals Atmospheric Chemistry and Physics (ACP), Atmospheric Measurement Techniques (AMT) and Geoscientific Model Development (GMD) with their respective discussion journals. A description of the content and a list of the included publications can be found on the BACCHUS Special Issue's website.
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21 June 2017

BACCHUS partners publish in Nature

Jurgita Ovadnevaite, NUI Galway/Ireland and her co-workers published an article in the Nature journal with the title: "Surface tension prevails over solute effect in organic-influenced cloud droplet activation". Read more on their work in the article.
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23 March 2017

European Commission features BACCHUS project

On the World Meteorological Day, the European Commission Research & Innovation features the BACCHUS project in their headline article and addresses the importance of understanding the impact of aerosols on clouds and climate studied in the project. The full article can be found here as well as a Tweet on #EUScience&Innovation.
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20 December 2016

BACCHUS partners participate in the Antarctic Circumnavigation Expedition

In December 2016 the Antarctic Circumnavigation Expedition (ACE) was launched by the Swiss Polar Institute at Cape Town/South Africa. Aboard the Russian research vessel Akademic Treshnikov an international group of researchers started their reaserach cruise to explore the climatology, glaciology, oceanography, biology and biochemistry of the Antarctic during their expedition until March 2017. See what is going on and follow on Twitter.
Julia Schmale, Paul Scherrer Institute/Switzerland, lead the climatology research to study the preindustrial-like aerosol climate effects (ACE-SPACE). More details on their work can be found on Julia Schmale's website and blog.
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08 December 2016

DACCIWA publishes Autumn Newsletter 2016

Our partner FP7 project DACCIWA has recently issued its Autumn Newsletter 2016.
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05 October 2016

2nd StratoClim Newsletter published

Our partner FP7 project StratoClim has issued its Autumn Newsletter 2016.
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13 July 2016

5th ChArMEx International Workshop


The 5th ChArMEx International Workshop will take place in October 2016 in Larnaca (Cyprus). The workshop is jointly organized by the BACCHUS and ACTRIS2 projects. Additional information is available on the The Cyprus Institute's website.
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June 2016

BACCHUS partners report in Science and Nature


F. Bianchi et al., Science, 2016
Many of the particles in the troposphere are formed in situ, but what fraction of all tropospheric particles do they constitute and how exactly are they made? Bianchi et al. report results from the high-altitude research station Jungfraujoch, Switzerland. In the majority of the cases, the particles were formed by the condensation of highly oxygenated molecules without significant contribution by sulfuric acid. This supports similar findings from laboratory studies in the CLOUD chamber at CERN (see Kirkby et al., 2016 below) and together they are an important change in paradigm that sulfuric acid is a requirement for most nucleation in the troposphere. Moreover, model calculations revealed that new particle formation occurs at the Jungfraujoch during a limited time window after the last contact with the planetary boundary layer."
Bianchi, F. et al., New particle formation in the free troposphere: A question of chemistry and timing, Science, Vol. 352, 6289, 2016, doi:10.1126/science.aad5456, Article

J. Kirkby et al., Nature, 2016; J. Tröstl et al., Nature, 2016
"About half of present-day cloud condensation nuclei originate from atmospheric nucleation. Sulfuric acid vapor is often involved in nucleation but is too scarce to explain most subsequent growth, leaving organic vapors as the most plausible alternative. Although recent studies predict that low-volatility organic vapors contribute during initial growth, direct evidence has been lacking. Kirkby et al. present experiments performed in a large chamber under atmospheric conditions and show that organic vapors alone can drive nucleation, in agreement with the field results in Bianchi et al. (2016) above. Tröstl et al. present a particle growth model that quantitatively reproduces the measurements and implement a parameterization of the first steps of growth in a global aerosol model. They find that concentrations of atmospheric cloud concentration nuclei can change substantially in comparison with previously assumed growth rate parameterizations."
Tröstl., J. et al., The role of low-volatility organic compounds in initial particle growth in the atmosphere, Nature, 533, 7604, 527-531, 2016, doi:10.1038/nature18271, Article.
Kirkby, J. et al., Ion-induced nucleation of pure biogenic particles, Nature, 533, 7604, 521-526, 2016, doi:10.1038/nature17953, Article
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12 May 2016

DACCIWA publishes Spring Newsletter 2016

Our partner FP7 project DACCIWA has recently issued its Spring Newsletter 2016.
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30 November 2015

BACCHUS consortium issues mid-term summary for policy makers

After two years of extensive research on the interactions between aerosols and clouds and their effects on climate, BACCHUS issues its mid-term summary for policy makers.
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10 November 2015

E. Stopelli and coauthors publish Nature article

Ice nucleation in cold clouds is a decisive step in the formation of rain and snow. Observations and modelling suggest that variations in the concentrations of ice nucleating particles (INPs) affect timing, location and amount of precipitation. A quantitative description of the abundance and variability of INPs is crucial to assess and predict their influence on precipitation. In the paper, the authors used the hydrological indicator delta-O-18 to derive the fraction of water vapour lost from precipitating clouds and correlated it with the abundance of INPs in freshly fallen snow.
[Read more ...(en)]
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September 2015

Article on Girls Day 2015 published in Eysi Energii

An article about the IACETH experimental day for girls, that took place on 13 August 2015, has been published in the customer magazine "Eysi Energii" of the cantonal utility company Nidwalden (de).
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17 June 2015

First DACCIWA Newsletter

The first DACCIWA Newsletter is now online
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19 March 2015

"Cloud catcher" woman

In order to study clouds, it is necessary to get high up in the atmosphere. At the mountain station Eggishorn in Kanton Wallis, Switzerland, at 2869 metres above sea level, Ulrike Lohmann, professor for atmospheric physics, reports in an interview about the research project HoloGondel. As part of this project, a holographic measurement device has been mounted to the roof of the Eggishorn cable car to measure the composition of clouds from the valley station to the top of the mountain. By running their instruments on the downward moving cable car, the scientists want to learn if the clouds typically consist of cloud droplets, ice crystals, or both, and how the composition varies with altitude.

Watch the video interview about the "cloud catcher" woman and the HoloGondel project. The interview is in german.

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03 March 2015

ChArMEx-BACCHUS campaign in Cyprus started

The Cyprus Institute (Nicosia, Cyprus) coordinates an international field campaign to study cloud properties and desert dust in Cyprus from 3 to 27 March 2015: As part of BACCHUS and the French project ChArMEx, scientists investigate key processes and feedbacks controlling the formation of clouds. Among other instruments, Unmanned Research Aircraft (drones) from Cyprus Institute and Meteo-France are deployed to carry out measurements. Further information on the campaign can be found here.

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06 February 2015

BACCHUS related press release Meteo France

Des mini-drones instrumentés pour la recherche en météorologie (fr). - Mini drone instruments for meteorological research.
Drones have serious advantages for studying the atmosphere: they are able to fly up to a few kilometres altitude and can be directed as required. Researchers at Météo France have recently conducted a test campaign at Atmospheric Research Centre (CRA) of Labotratoire d'Aérologie / Observatoire Midi-Pyrénées, in collaboration with the National Civil Aviation School (ENAC). The objective: to test under real weather conditions the miniaturised sensors that will equip the drones in a planned measurement campaign on Cyprus in this spring.

See the complete article at
http://www.meteofrance.fr/actualites/22577295-des-mini-drones-pour-la-recherche-en-meteorlogie (in FR).

English translation of complete article
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30 December 2015

DACCIWA website online

The DACCIWA website is now online under: http://www.dacciwa.eu/
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30 September 2014

StratoClim website online

The StratoClim website is now online under: http://www.stratoclim.org/
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29 August 2014

"Vacuum cleaning on top of Europe"

Staying at the “top of Europe”, Jungfraujoch in the Swiss Alps, 3600 meters above sea level. Ulrike Lohmann, professor for atmospheric physics, explains in an interview what a cloud is, how aerosols (particulate matter) interact with clouds, how rain forms and why clouds can be dangerous for airplanes in certain situations.
In a current research campaign on Jungfraujoch a newly developed cloud chamber is tested. Lohmann and her team use that to simulate cloud processes. This “oversized vacuum cleaner” sucks ambient air and detects in the inner part of the chamber if certain aerosols form ice crystals or not. The researchers notice that humans pollute air and so affect clouds. But aerosols not only interact with clouds, they also cool the climate like a parasol and thus mask the warming effect of greenhouse gases like CO2. Why we still should try hard to reduce aerosol emissions, explains Lohmann: climate and health protection only work together, if both, aerosols and greenhouse gases will be reduced. Looking at the wonderful glaciers surrounding Jungfraujoch she hopes that this will be done sooner rather than later.

See the workshop interview on vacuum cleaning on Mt Jungfraujoch and why this matters for BACCHUS here. The interview is in german.



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28 August 2014

Get a list of mentoring schemes at BACCHUS partner institutes

You are interested in a mentoring scheme but don't know where to find an adequate programe? Find a list of mentoring schemes offered at BACCHUS partner institutions here.

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27 August 2014

First scientific deliverable available

Workpackage 1 of the BACCHUS team has published the first scientific deliverable of BACCHUS. It is about the " Definition of the BACCHUS aerosol/cloud database (structure, contents), first preliminary data set (some cloud products from satellite observations and first CCN/IN data)". [Read more... (en)]

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21 July 2014

Successful IAC ETH experimental day for girls carried out

The Institute for Atmospheric and Climate Science (ETH Zurich) offered once again an experimental day for girls in July this year. Under the motto „Being weather and climate researcher at ETH“ 20 girls aged between 10 and 13 years and one boy spent one day at IAC, guided by meteorologists and researchers of the institute. In so doing, they could experience in a playful way how it is to be a scientist and discover their enthusiasm for the natural sciences. [Read more... (en)]

source: feriennet.ch

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May 2014

R. Makkonen and co-authors publish article on improved nucleation parameterization in the Norwegian earth system model.

The Norwegian Earth System Model (NorESM) is evaluated against atmospheric observations of aerosol number concentrations. The model is extended to include an explicit mechanism for new particle formation and secondary organic aerosol (SOA) formation from biogenic precursors.[...] Comparison of monthly averaged aerosol number concentrations against 60 measurement sites reveals that the model with explicit nucleation and SOA scheme performs well in terms of correlation coefficient [...]. NorESM generally overestimates the amplitude of the seasonal cycle, possibly due to underestimated sinks or exaggerated sensitivity to biogenic precursors. [Read more... (en)]

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30 May 2014

How to achieve gender equality?

The BACCHUS gender action plan is now available for download.


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April 2014

"Does the Sky Have a Faulty Filter?" .

First results from StratoClim have been featured in the Science Magazine: "Does the Sky Have a Faulty Filter?" [Read more... (en)]

source: www.sciencemag.org

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April 2014

DACCIWA kick-off in Karlsruhe

The DACCIWA Kick-off meeting took place in Karlsruhe, 8-9th April 2014.
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April 2014

StratoClim kick-off in Berlin

The StratoClim kick-off meeting took place in Berlin from 31st March to 1st April 2014 with 71 participants.
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March 2014

P. Connolly and co-authors publish article on the activation of cloud drops.
We present a parameterisation of aerosol activation, including co-condensation of semi-volatile organics, for warm clouds that has applications in large-scale numerical models. It is found that the scheme is consistent with parcel model calculations of co- condensation under different regimes. Such a parameterisation may find use in evaluating important feedbacks in climate models. [Read more... (en)]

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4 Febraury 2014

Article on BACCHUS project start in ETH Zukunftsblog online.

Wie Wolken und Feinstaubpartikel die Erdatmosphaere beeinflussen ist in vieler Hinsicht unklar. Die komplexen Zusammenhaenge sind auch in Klimamodellen nur schwer vorhersagbar. Ein neues EU-Forschungsprojekt will nun genauer klaeren, welche Rolle Wolken und Feinstaub fuer das Klima spielen.[Read more... (de)]

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January 2014

D. Rosenfeld and co-authors publish article on climatic effects of aerosol-cloud interactions.

Aerosols counteract part of the warming effects of greenhouse gases, mostly by increasing the amount of sunlight reflected back to space. However, the ways in which aerosols affect climate through their interaction with clouds are complex and incompletely captured by climate models. [Read more... (en)]

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16 January 2014

Cluster factsheets available

DACCIWA, BACCHUS and StratoClim factsheets are ready to download.

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8-9 January 2014

BACCHUS kick-off in Zurich

The BACCHUS consortium successfully held its kick-off on 8-9 January 2014 in Zurich. 50 scientists from over Europe and Israel attended the meeting for discussing and deciding about how to best achieve the first milestones.
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9 December 2013

ClimPol project joins the Cluster

We are delighted that the ClimPol project located at the IASS joined the Aerosols and Climate research cluster. ClimPol, launched in May 2012, is dedicated to investigate the research needs and pathways to policy implementation regarding the reduction of short-lived climate-forcing pollutants (SLCPs), which include anthropogenic aerosols.
The project will virtually be located between the various SLCP related science communities and the diverse stakeholder communities such as decision-makers, civil societies, the private business sector and others to broker information in both directions. ClimPol will help the Aerosols and Climate research cluster to interact with its stakeholders, better understand their needs and to transform scientific progress into impact on policy and society. [Read more...]

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Cluster kick-off event in Potsdam
The Aerosols and Climate research cluster was officially launched during a kick-off event at the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI). [Read more...]





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