BrainMap

Viorica Nagavciuc

Dr.

- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research

Other affiliations

Postdoc researcher - UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (Romania)

Researcher

Web of Science ResearcherID: https://www.researchgate.net/profile/Nagavciuc_Viorica2

Expertise & keywords

Exploring beech and oak forests adaptive capacity, and vulnerability to rapid climate change using advanced dendroecological techniques. Call name: P 1 - SP 1.1 - Proiecte de cercetare pentru stimularea tinerelor echipe independente - TE-2021
PN-III-P1-1.1-TE-2021-1419 2022 - 2024

Role in this project:

Coordinating institution: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA

Project partners: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Affiliation:

Project website: http://www.silvic.usv.ro/fastclim/

Abstract:

Forest growth decline induced by a changing climate represents an active process, being present worldwide with colossal implications on global environmental conditions, socio-economic structures, and carbon sequestration. In this context, this proposal will respond to the most stringent ecological issues: Are there species-related differences in the growth reaction to pronounced extreme events? Which are the main biometric and anatomical parameters that could influence the resilience and resistance of tree species to extreme climatic events? How forests will respond to future climatic changes and what are the best practices for sustainable forest management to mitigate the negative effects of climate change? Our project will start off by setting up a complete and integrated dendro-network in Eastern Romania and Republic of Moldavia that will focus on the most widespread species, beech, and oak. After assessing the current status of main forest ecosystems, growth performance, and climate-growth interaction, our next goal will be to quantify the way forest reacts to extreme events and this will be done using an interdisciplinary approach, that involves, dendroecology, wood anatomy, from macro- to microscopic scale and from ecosystem type to individual tree. These data will reveal clues about the present and future climate changes, opening a new door into environmental sciences in Eastern Europe. This is a unique opportunity to answer the above urgent issues regarding Europe.

Looking into the past to anticipate the future: Extreme climate variability in Dobrogea Region from a paleo perspective based on stable oxygen isotope in tree rings Call name: P 1 - SP 1.1 - Proiecte de cercetare Postdoctorală
PN-III-P1-1.1-PD-2019-0469 2021 - 2022

Role in this project:

Coordinating institution: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA

Project partners: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Affiliation: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Project website: https://climextremes.usv.ro/homepage-2/

Abstract:

Reconstruction of droughts and heat waves events are necessary for a better understanding of their dynamics and to improve projections associated with future extreme events, especially in convergent climatic areas such as Dobrogea. The oak ring width from the low altitude regions has, in general, a low correlation with the main climatic parameters, but the stable isotopes in these areas can provide additional information about past climatic variability. As such, the specific objectives of this project are manifold: 1) High-resolution records of past climate extremes from δ18O chronology in tree ring cellulose from the Dobrogea region; 2) Reconstruction of the climatic (e.g. heat waves) and hydroclimatic (e.g. droughts) extreme events from the Dobrogea region over the last centuries (~300 years) and 3) Interpretation of the present climatic and hydroclimatic extremes in the context of the long-term variability, by using proxy-based data (δ18O chronology in tree ring cellulose), observational records and paleoclimate model simulations (available from the Coupled Model Intercomparing Project Phase 5).

The expected results of this project are to reconstruct the past climatic variability based on the new paleo reconstruction made using stable isotopic composition in tree-ring cellulose, at local and large scale, and to analyze the past climatic and hydroclimatic extreme events in the context of the long-term variability. Thus, the results obtained throughout the current project can be regarded as a direct contribution to the improvement of the National Strategy on Climate Change of Romania, which a special focus on the measures needed to adapt and manage the desertification of the south-eastern part of Romania, by improving the climatic models and therefore improving their accuracy for future projection of extreme events and their intensity.

Underwater geological structures prone to the generation and accumulation of biogases - associated geo-biogeochemical processes Call name: P 1 - SP 1.2 - Proiecte complexe realizate in consorții CDI
PN-III-P1-1.2-PCCDI-2017-0178 2018 - 2021

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU GEOLOGIE SI GEOECOLOGIE MARINA - GEOECOMAR

Project partners: INSTITUTUL NATIONAL DE CERCETARE-DEZVOLTARE PENTRU GEOLOGIE SI GEOECOLOGIE MARINA - GEOECOMAR (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); INSTITUTUL NAŢIONAL DE CERCETARE-DEZVOLTARE MARINĂ "GRIGORE ANTIPA"-I.N.C.D.M. CONSTANŢA (RO); INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA SI INGINERIE NUCLEARA " HORIA HULUBEI " - IFIN - HH (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website: https://sites.google.com/view/ubiogas

Abstract:

In comparison with the accumulations of thermogenic methane, the accumulations of biogenic ones are formed in more predictable geological settings. At global level it has been assessed that more than 20% of the total methane reserves are biogenic. In the last decade in Romania the interest for the biogenic methane has increased constantly and the most important discovery, with reserves that can cover the entire needs for methane of Romania for 6-8 years, is methane of biogenic origin. This finding of biogenic methane is in the Domino geological structure, offshore Black Sea, in the Romanian economic exclusive zone.

The present research program, uBioGas, by its 3 projects: (10 Plio-Quaternary geological structures favorable to the generation and accumulation of biogenic methane in the Romanian zone at the Black Sea; (2) Determination of bio-geochemical parameters associated to the geological structures evidenced in the project (1), requested for 1D modelling of the methane generation processes and development of analogies regarding the generation and accumulation processes that take place in the Plio-Quaternary pile of sediments.

(3) Paleogeographic evolution of the studied region, in the framework of nowadays and Quaternary environment - climate changes, their influence against the processes of generation and accumulation of methane.

According with the project’s topic and with the structure of the consortium that performs the research program, the project is an interdisciplinary one, with researchers from geosciences (geologists, geophysicists, geochemists), natural sciences (chemistry, physics, biology), from almost all Romanian regions.

The projects valorize the available Romanian research infrastructure, but will also contributes to the further development of it, by adding new equipments and updates to the ones needed to perform the researches, in accordance with the global developments, including the training of researchers in using the new technologies.

Reconstruction and analysis of patterns of winter temperature and North Atlantic Oscillation variability in Europe during the past millennium: an underground glaciers perspective Call name: P 1 - SP 1.1 - Proiecte de cercetare pentru stimularea tinerelor echipe independente
PN-III-P1-1.1-TE-2016-2210 2018 - 2020

Role in this project:

Coordinating institution: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA

Project partners: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Affiliation: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Project website: https://sites.google.com/site/tewinteriscoming/

Abstract:

If we are to understand the ongoing climatic changes, adapt to them and/or mitigate their effects, a better understanding of the climate system and of the mechanisms behind its variability is required, and given the shortness of the instrumental climate record, proxy-based reconstructions are needed.

The instrumental temperature data clearly shows that winter climate variability in Europe is much larger than that in summer and that much of this variability is induced by the capriciousness of the North Atlantic Oscillation (NAO), the leading mode of climate variability in the Northern Hemisphere.

In recent years, reconstructing past climate variability advanced in major leaps, however, the majority of these reconstructions are biased towards the warm season, with only a very limited set capturing winter climate. It results from the above that, while the European climate variability is dominated by changes occurring in the winter season, our understanding of the long-term context of these changes is limited in time, patchy in space and difficult to use in studying spatial patterns. In order to address this problem, the aim of our study is to extract ice cores from selected caves, constrain the age of the ice layers with radiocarbon dates and, by analyzing the isotopic composition of ice, reconstruct winter climatic variability (temperature, moisture sources and changes in the phase and strength of the NAO) across Europe during the past 1000 years. Compared with other reconstructions, the advantages of the hereby proposed one, are: 1) a single proxy – δ18O (or δ2H), the same for all areas; 2) consistency between sites in terms of temporal resolution (all ice core will be radiocarbon dated, using the abundant organic matter embedded in ice); 3) the possibility to locate moisture sources (using d-excess, d = δ2H-8*δ18O) for different regions of Europe, thus strongly increasing the value of the reconstructed NAO variability.

Mobilitate cercetător Viorica Nagavciuc Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori, 2019
PN-III-P1-1.1-MC-2019-0765 2019 - 2019

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO)

Project website:

Abstract:

Crossing the Carpathians: environmental and cultural controls of the expansion of Neolithic cultures in SE Europe Call name: Projects for Young Research Teams - RUTE -2014 call
PN-II-RU-TE-2014-4-1993 2015 - 2017

Role in this project:

Coordinating institution: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA

Project partners: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Affiliation: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Project website: https://sites.google.com/site/neolithicexpantion/home

Abstract:

The study of the origin and dispersal of Neolithic cultures has been the subject of heated debate since the seminal work of Childe (1942). To what extent the dispersal process was influenced by environmental factors is still debated, one of the issues being whether climatic conditions influencing agricultural practices could have affected the dispersal route, “blocking” some of the Neolithic societies in front of ecological barriers. Data from Neolithic sites in SE Europe shows that a continuous stream of people and cultures flowed through the Danube’s Iron Gates towards Central Europe, while in the eastern part of Europe this process was delayed, people and cultures “moving” around the Carpathians and crossing it with a delay of ca. 1000 years. The causes of this delay are still unsolved, and in this context, the aim of this project is to investigate the environmental conditions and the possible constrains they have put on the spread of Neolithic populations across the Carpathian Mts. in the processes of neolithization in Central Europe. We will address this issue by providing a spatial reconstruction of climatic and environmental conditions during the neolithization of the Carpathians and use it in combination with absolutely dated Neolithic cultures in the greater Carpathian region to develop models for the neolithization, under a combination of environmental and cultural influences.

project title Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori
PN-III-P1-1.1-MC-2017-1335 2017 -

Role in this project:

Coordinating institution: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA

Project partners: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Affiliation: UNIVERSITATEA "ŞTEFAN CEL MARE" DIN SUCEAVA (RO)

Project website:

Abstract:

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