El Locos por la Tierra retoma las sesiones presenciales

Después de hacer diversas sesiones en formato virtual, el programa Locos por la Tierra impartido por el ICTA-UAB reanudó el pasado día 27 de junio sus sesiones formativas en formato presencial.

What do we breathe when in the forest?

For the first time, a study characterizes the forest chemistry of the air under the canopy of a Mediterranean holm oak forest and detects maximum concentrations in July and August.

Catalonia's Scientific Contributions to Fighting Covid-19

Sixty ICREA researchers, including Isabelle Anguelovski of the ICTA-UAB, lead more than a hundred research activities on Covid-19.

Academia in the Time of COVID-19: Towards an Ethics of Care


Computer Platform Gives Visibility to Catalonia's Small Villages

A research team from the UAB, in collaboration with the Association of Microvillages of Catalonia, has created a Geographic Information System (GIS) for Active and Sustainable Hamlets (GISASH), which gathers information on the state of and services offered by the more than 330 municipalities in Catalonia with fewer than 500 inhabitants.

Environmental justice defenders victims of violence and murder

Grassroots movements halt environmental degradation in up to 27% of environmental conflicts worldwide, according to a study by the ICTA-UAB.

Technological changes and new low-carbon lifestyles, key to mitigating climate change impacts

In order to mitigate climate change impacts and achieve a more sustainable society, it is necessary to transform the current energy system based on fossil fuels into a model based on renewable energies.

Exploring climate change impacts through popular proverbs

Members of an irrigation community doing maintenance work in an acequia de careo (irrigation canal built at the top of the mountain) to improve the circulation of water for irrigation and human consumption.

Neolithic vessels reveal dairy consumption in Europe 7,000 years ago

Pottery from the site located in Verson (Francia) analysed during the research (Picture by Annabelle Cocollos, Conseil départemental du Calvados ou CD14 publicada en Germain-Vallée et al.

Mapping out the impacts of pollution upon Indigenous Peoples worldwide

Sulphur mine in Ijen, Java, Indonesia. Picture by Joan de la Malla.

Economic growth is incompatible with biodiversity conservation

A study involving more than 20 specialists in conservation ecology and ecological economics highlights the contradiction between economic growth and biodiversity conservation.

Encuesta: El rol del verde residencial durante el confinamiento por el brote de COVID-19 en España

El grupo de investigación BCNUEJ (www.bcnuej.org) del ICTA-UAB (https://ictaweb.uab.cat/) y del IMIM (www.imim.es) está realizando un estudio sobre el papel del verde residencial (vegetación interior, en balcones, en terrazas, cubiertas verdes, jardines particulares, etc.

ICTA-UAB shares protective material with hospitals

ICTA-UAB is since last Monday 16 March 2020, an Institute with Restricted Access. Most of the laboratories are empty, the Scientific and Technical Services are closed, only the basic services are working and most of the people is working and staying at home.

Higher and earlier pollen concentrations expected for this spring

Spring and summer pollination will begin a few days earlier than usual and in important numbers, reaching higher than average levels (from the 1994-2019 period).

Power struggles hinder urban adaptation policies to climate change

Transformative actions implemented by cities to address and mitigate the impacts of climate change may be hindered by political struggles for municipal power.

Analysis of tropical fire soot deposited in the ocean will help predict future global climate changes

The ICTA-UAB begins a scientific expedition in the Atlantic Ocean to collect dust and smoke samples from the fires of tropical Africa deposited in marine sediments.

What elements and characteristics should forests have to influence human health?

Despite the increasing interest of the scientific community and society towards the potential of forests as a source of human health, the existing scientific literature does not allow for a coherent relationship between the type of forest and different health variables.

Red coral effectively recovers in Mediterranean protected areas after decades of overexploitation

Protection measures of the Marine Protected Areas have enable red coral colonies (Corallium rubrum) to recover partially in the Mediterranean Sea, reaching health levels similar to those of the 1980s in Catalonia and of the 1960s in the Ligurian Sea (Northwestern Italy).

Sub-national “climate clubs” could offer key to combating climate change

‘Climate clubs’ offering membership for sub-national states, in addition to just countries, could speed up progress towards a globally-harmonised climate change policy, which in turn offers a way to achieve stronger climate policies in all countries.

Victoria Reyes-García receives an ERC Proof of Concept grant linked to the LICCI project

Victoria Reyes-García ICREA Research Professor at the Institute of Environmental Science and Technology of the Universitat Autònoma de Barcelona (ICTA-UAB) is one of the 76 top researchers that will receive ERC Proof of Concept grants.

ICTA-UAB demands the UAB to reduce number of flights

Given our current climate emergency, recently acknowledged by the UAB, the Institute of Environmental Science and Technology of the Universitat Autònoma de Barcelona (ICTA-UAB) has drawn up a proposal urging the University to put into action a new travel policy to tackle one of its most polluting activities: Flying.

New assessment finds EU electricity decarbonization discourse in need of overhaul

It’s well known that the EU is focusing its efforts on decarbonizing its economy.

Mining waste dumped into Portmán Bay continues to release metals into the sea 25 years later

The waters of the Mediterranean Sea continue to receive dissolved metals from the mining waste deposited in Portmán Bay (Murcia) 25 years after the cessation of mining activity.

A new ICTA-UAB project to assess the impacts of micro- and nano-plastics in the tropical and temperate oceans

A new project led by ICTA-UAB researcher Patrizia Ziveri is one of five projects selected for funding by the Joint Programming Initiative Healthy and Productive Seas and Oceans (JPI Oceans).
OCEAN & CLIMATE SEMINAR: "Hydroxylated tetraether lipids as sea surface temperature proxies in the Gulf of Lions and the Iberian Margin during the last glacial cycle", by Nina Davtian

Date: 2020-02-03



Title: "Hydroxylated tetraether lipids as sea surface temperature proxies in the Gulf of Lions and the Iberian Margin during the last glacial cycle"
Speaker: Nina Davtian,  Collège de France, CEREGE, France

Date: Monday, February 3rd 2020
Time: 12h
Venue: Room Z/022-23


Abstract: Hydroxylated tetraethers (OH-GDGTs) are membrane lipids produced by ammonia-oxidizing archaea. Following a regional and global core-top study, the ubiquity of OH-GDGTs has been established in the marine realm and novel organic proxies, the Ring Indices of OH-GDGTs (RI-OH and RI-OH') have been proposed for sea surface temperature (SST) reconstructions. The novel RI-OH and RI-OH' proxies are thus potential alternatives to established SST proxies, such as the oxygen isotopic composition of planktic foraminifers, the C37 ketone unsaturation ratio (UK′37) and the TetraEther indeX of tetraethers consisting of 86 carbon atoms (TEX86). However, the paleothermometric potential of RI-OH and RI-OH' has barely been tested in paleoclimatic archives. In this seminar, I will report the analytical developments I conducted during my PhD to improve the analysis of tetraether-based proxies. Then, I will introduce two promising attempts to validate the novel RI-OH and RI-OH' SST proxies under contrasting (paleo)environemental contexts during the last glacial cycle (last 160,000 years). The first attempt focuses on RI-OH-based paleothermometry in a shallow core from the Gulf of Lions in the western Mediterranean Sea. The second attempt focuses on RI-OH'-based paleothermometry in a deep-sea sediment core located in the Iberian Margin. More specifically, I will present the main results based on proxy-proxy comparisons for both attempts, a regional compilation of glacial-interglacial SST anomalies for the first attempt and phase relationship studies as well as the application of the bipolar seesaw model for the second attempt. 

Nina Davtian is a postdoctoral research assistant at the Collège de France, Climate and Ocean Evolution, CEREGE, France. She started her education as an undergraduate at the prestigious ENS de Lyon, and completed several research internships, including one at CEREGE (cosmogenic isotopes) and another at MARUM, Germany (organic geochemistry). After her PhD at CEREGE/Aix-Marseille University, she started to further validate novel organic paleothermometers, which she first tested with the analytical method that she developed during her PhD. More specifically, Nina performs proxy-proxy comparisons and phase relationship studies between proxies in a given study site as well as between marine and ice core climatic records. Nina's present reasearch interests include tetraether-based paleothermometers and source indicators as well as paleoclimatology, paleoenvironments and paleoceanography (Quaternary glacial-interglacial cycles and millenial climatic events). Furthermore, Nina is motivated to broaden her areas of expertise by working on other biomarkers than tetraethers, conducting compound specific isotope analyses, including radiocarbon, and studying modern samples as well as pre-Quaternary climatic archives.

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