Project acronym DEEP PURPLE
Project DEEP PURPLE: darkening of the Greenland Ice Sheet
Researcher (PI) Martyn TRANTER, Alexandre Barbosa Anesio, Liane Benning
Host Institution (HI) AARHUS UNIVERSITET
Country Denmark
Call Details Synergy Grants (SyG), SyG, ERC-2019-SyG
Summary The stability of the Greenland Ice Sheet (GrIS) is a threat to coastal communities worldwide. The PIs have changed our understanding of why it darkens during the melt season, becoming increasingly deep purple due to pigmented ice algal blooms in the ice surface, producing more melt and accelerating the GrIS towards its tipping point, and increasing sea level. The next step jump in our understanding of biological darkening will be provided by DEEP PURPLE, which will establish the factors that control ice algal blooms. These factors are essential for modelling of future melting, which require a process-based understanding of blooming. DEEP PURPLE will quantify the synergies between the biology, chemistry and physics of ice algae micro-niches in rotting, melting ice, and examine the combination of factors which stabilise them. State-of-the-science analytical and observational methods will be employed to characterise the complex mosaic of wet ice habitats, dependent on factors such as the hydrology, nutrient status, particulate content and light fields within these continually evolving ice-water-particulate-microbe systems. We will quantitatively assess why and how the fine light mineral dust particulates contained within the melting ice amplify the growth of ice algae. The particulate content and composition of different layers in the GrIS is dependent on age, and so the algae that the melting ice can support may fundamentally change over time. We look back to understand if the ice biome has changed through the Anthropocene via analyse of fjord sediments. The first draft genome of ice algae will show their key adaptations to glacier surface habitats. DEEP PURPLE looks forward by providing the critical field data sets and conceptual models of ice algal growth that will facilitate the next generation of predictive models of sea level rise due to biologically enhanced melting of the GrIS.
Summary
The stability of the Greenland Ice Sheet (GrIS) is a threat to coastal communities worldwide. The PIs have changed our understanding of why it darkens during the melt season, becoming increasingly deep purple due to pigmented ice algal blooms in the ice surface, producing more melt and accelerating the GrIS towards its tipping point, and increasing sea level. The next step jump in our understanding of biological darkening will be provided by DEEP PURPLE, which will establish the factors that control ice algal blooms. These factors are essential for modelling of future melting, which require a process-based understanding of blooming. DEEP PURPLE will quantify the synergies between the biology, chemistry and physics of ice algae micro-niches in rotting, melting ice, and examine the combination of factors which stabilise them. State-of-the-science analytical and observational methods will be employed to characterise the complex mosaic of wet ice habitats, dependent on factors such as the hydrology, nutrient status, particulate content and light fields within these continually evolving ice-water-particulate-microbe systems. We will quantitatively assess why and how the fine light mineral dust particulates contained within the melting ice amplify the growth of ice algae. The particulate content and composition of different layers in the GrIS is dependent on age, and so the algae that the melting ice can support may fundamentally change over time. We look back to understand if the ice biome has changed through the Anthropocene via analyse of fjord sediments. The first draft genome of ice algae will show their key adaptations to glacier surface habitats. DEEP PURPLE looks forward by providing the critical field data sets and conceptual models of ice algal growth that will facilitate the next generation of predictive models of sea level rise due to biologically enhanced melting of the GrIS.
Max ERC Funding
11 007 344 €
Duration
Start date: 2020-01-01, End date: 2025-12-31
Project acronym HistoGenes
Project Integrating genetic, archaeological and historical perspectives on Eastern Central Europe, 400-900 CE
Researcher (PI) Walter POHL, Patrick Geary, Johannes Krause, Tivadar Vida
Host Institution (HI) OESTERREICHISCHE AKADEMIE DER WISSENSCHAFTEN
Country Austria
Call Details Synergy Grants (SyG), SyG, ERC-2019-SyG
Summary Few parts of Europe witnessed so many population shifts in a few centuries as the Carpathian Basin in 400-900 CE. In this macro-region along the middle Danube, Pannonians, Romans, Goths, Gepids, Longobards, Avars, Bulgars, Slavs, Franks and many others came and went. This is an intriguing test case for the relationship between ethnic identities constructed in texts, cultural habitus attested in the archaeological record, and genetic profiles that can now be analysed through ancient DNA. What was the impact of migrations and mobility on the population of the Carpathian Basin? Was the late antique population replaced, did it mix with the newcomers, or did its descendants only adopt new cultural styles? To what degree did biological distinctions correspond to the cultural boundaries and/or ethnonyms in the texts? If pursued with methodological caution, this case study will have implications beyond the field.
HistoGenes will analyse c. 6,000 samples from graves with cutting edge scientific methods, and contextualize the interpretation of these data in their archaeological and historical setting. The rapid progress of aDNA analysis and of bio-informatics now make such an enterprise viable. However, the methods of historical interpretation have not kept pace. HistoGenes will, for the first time, unite historians, archaeologists, geneticist, anthropologists, and specialists in bio-informatics, isotope analysis and other scientific methods. Many team members have already collaborated successfully in a pilot project, which has demonstrated the feasibility of the approach and of the integrated workflow at the core of the project. A wide range of particular historical questions will be addressed from an interdisciplinary perspective, and fundamental theoretical and methodological issues can be explored. HistoGenes will not only advance our knowledge about a key period in European history, but also establish new standards for the historical interpretation of genetic data.
Summary
Few parts of Europe witnessed so many population shifts in a few centuries as the Carpathian Basin in 400-900 CE. In this macro-region along the middle Danube, Pannonians, Romans, Goths, Gepids, Longobards, Avars, Bulgars, Slavs, Franks and many others came and went. This is an intriguing test case for the relationship between ethnic identities constructed in texts, cultural habitus attested in the archaeological record, and genetic profiles that can now be analysed through ancient DNA. What was the impact of migrations and mobility on the population of the Carpathian Basin? Was the late antique population replaced, did it mix with the newcomers, or did its descendants only adopt new cultural styles? To what degree did biological distinctions correspond to the cultural boundaries and/or ethnonyms in the texts? If pursued with methodological caution, this case study will have implications beyond the field.
HistoGenes will analyse c. 6,000 samples from graves with cutting edge scientific methods, and contextualize the interpretation of these data in their archaeological and historical setting. The rapid progress of aDNA analysis and of bio-informatics now make such an enterprise viable. However, the methods of historical interpretation have not kept pace. HistoGenes will, for the first time, unite historians, archaeologists, geneticist, anthropologists, and specialists in bio-informatics, isotope analysis and other scientific methods. Many team members have already collaborated successfully in a pilot project, which has demonstrated the feasibility of the approach and of the integrated workflow at the core of the project. A wide range of particular historical questions will be addressed from an interdisciplinary perspective, and fundamental theoretical and methodological issues can be explored. HistoGenes will not only advance our knowledge about a key period in European history, but also establish new standards for the historical interpretation of genetic data.
Max ERC Funding
9 996 574 €
Duration
Start date: 2020-05-01, End date: 2026-04-30
