ERC FUNDED PROJECTS

Despite its importance for human health and climate change organic aerosol (OA) remains one of the least understood aspects of atmospheric chemistry. We propose to develop an innovative new framework for the description of OA in chemical transport and climate models that will be able to overcome the challenges posed by the chemical complexity of OA while capturing its essential features. The objectives of ATMOPACS are: (i) The development of a new unified framework for the description of OA based on its two most important parameters: volatility and oxygen content. (ii) The development of measurement techniques for the volatility distribution and oxygen content distribution of OA. This will allow the experimental characterization of OA in this new “coordinate system”. (iii) The study of the major OA processes (partitioning, chemical aging, hygroscopicity, CCN formation, nucleation) in this new framework combining lab and field measurements. (iv) The development and evaluation of the next generation of regional and global CTMs using the above framework. (v) The quantification of the importance of the various sources and formation pathways of OA in Europe and the world, of the sensitivity of OA to emission control strategies, and its role in the direct and indirect effects of aerosols on climate. The proposed work involves a combination of laboratory measurements, field measurements including novel “atmospheric perturbation experiments”, OA model development, and modelling in urban, regional, and global scales. Therefore, it will span the system scales starting from the nanoscale to the global. The modelling tools that will be developed will be made available to all other research groups.

2 496 000 €

Start date: 2011-01-01, End date: 2015-12-31

The water cycle in the Himalaya is poorly understood because of its extreme topography that results in complex interactions between climate and water stored in snow and glaciers. Hydrological extremes in the greater Himalayas regularly cause great damage, e.g. the Pakistan floods in 2010, while the Himalayas also supply water to over 25% of the global population. So, the stakes are high and an accurate understanding of the Himalayan water cycle is imperative. The discovery of the monumental error on the future of the Himalayan glaciers in the fourth assessment report of the IPCC is exemplary for the scientific misconceptions which are associated to the Himalayan glaciers and its water supplying function. The underlying reason is the huge scale gap that exists between studies for individual glaciers that are not representative of the entire region and hydrological modelling studies that represent the variability in Himalayan climates. In CAT, I will bridge this knowledge gap and explain spatial differences in Himalayan glacio-hydrology at an unprecedented level of detail by combining high-altitude observations, the latest remote sensing technology and state-of-the-art atmospheric and hydrological models. I will generate a high-altitude meteorological observations and will employ drones to monitor glacier dynamics. The data will be used to parameterize key processes in hydro-meteorological models such as cloud resolving mechanisms, glacier dynamics and the ice and snow energy balance. The results will be integrated into atmospheric and glacio-hyrological models for two representative, but contrasting catchments using in combination with the systematic inclusion of the newly developed algorithms. CAT will unambiguously reveal spatial differences in Himalayan glacio-hydrology necessary to project future changes in water availability and extreme events. As such, CAT may provide the scientific base for climate change adaptation policies in this vulnerable region.

1 499 631 €

Start date: 2016-02-01, End date: 2021-01-31

Do even the smallest clouds simply drift with the wind? Vast areas of our oceans and land are covered with shallow cumulus clouds. These low-level clouds are receiving increased attention as uncertainties in their representation in global climate models lead to a spread in predictions of future climate. This attention emphasizes radiative and thermodynamic impacts of clouds, which are thought to energize the large-scale Hadley circulation. But broadly overlooked is the impact of shallow cumuli on the trade-winds that drive this circulation. Reasons for this negligence are a lack of observations of vertical wind structure and the wide range of scales involved. My project will test the hypothesis that shallow cumuli can also slow down the Hadley circulation by vertical transport of momentum. First, observations of clouds and winds will be explicitly connected and the causality of their relationship will be exposed using ground-based and airborne measurements and high-resolution modeling. Second, new lidar techniques aboard aircraft are exploited to validate low-level winds measured by the space-borne Aeolus wind lidar and collect high-resolution wind and turbulence data. Third, different models of momentum transport by shallow convection will be developed to represent its impact on winds. Last, evidence of global relationships between winds and shallow cumulus are traced in Aeolus and additional satellite data and the impact of momentum transport on circulations in a control and warmer climate is tested in a general circulation model. This project exploits my expertise in observing and modeling clouds and convection focused on a hypothesis which, if true, will strongly influence our understanding of the sensitivity of circulations and the sensitivity of climate. It will increase the predictability of low-level winds and convergence patterns, which are important to many disciplines, including climate studies, numerical weather prediction and wind-energy research.

1 867 120 €

Start date: 2017-01-01, End date: 2021-12-31

Many immigrants enter Europe both legally and illegally every year. This creates multiple challenges for the Union, including the gender and ethnic segregation of migrant groups, especially women. While it strives for an inclusive and integrated society as envisioned by the EU motto ‘Unity in Diversity’, it is still often perceived more as ‘Fortress Europe.’ This project focuses on the ‘connected migrant’, studying how virtual communities of migrants, or digital diasporas, convey issues of technology, migration, globalisation, alienation and belonging capturing the lives of migrants in their interaction with multiple worlds and media. More specifically, it will investigate whether digital technologies enhance European integration or foster gender and ethnic segregation, and, if so, how. Using a multi-layered and cutting-edge approach that draws from the humanities, social science and new media studies (i.e. internet studies and mobile media), this research considers: 1. How migration and digital technologies enable digital diasporas (Somali, Turkish, Romanian) and the impact these have on identity, gender and belonging in European urban centres; 2. How these entanglements are connected to and perceived from outside Europe by focusing on transnational ties; and 3. How digital connections create new possibilities for cosmopolitan outlooks, rearticulating Europe’s motto of ‘Unity in Diversity.’ The outcomes of this work will be innovative at three levels. a) Empirically, the project gathers, maps and critically grounds online behaviour by migrant women from a European comparative perspective. b) Methodologically, it breaks new ground by developing new methods of analysis for digital diasporas contributing to the development of ‘postcolonial’ digital humanities. c) Conceptually, it integrates colonial and migrant relations into the idea of Europe, elaborating on the notion of cosmopolitan belonging through virtual connectivity.

1 992 809 €

Start date: 2016-01-01, End date: 2020-12-31