H2020Индивидуална стипендия2019–2021

GOLD-ICE · Next generation analysis of the oldest ice core layers

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-01-15 → 2021-01-14
Финансиране от ЕС: 180 277 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Ледени ядра от Антарктика се анализират с лазерна спектрометрия, за да се проследи разпределението на химичните примеси в най-старите слоеве лед. Това помага за разбирането на природната климатична динамика и причините за промените в климата преди 1,2 милиона години.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Next generation analysis of the oldest ice core layers

"Polar ice cores are an indispensable key to understanding the natural climate dynamics and have become one of the cornerstones in today’s paleoclimate research. The next generation of international polar drilling projects aims to conduct ground-breaking research investigating the cause of the so-called “mid-Pleistocene transition” around 1.2 million years ago. A prominent example in this regard is the prestigious European project ""Beyond EPICA Oldest Ice Core"", funded by the EU, which has already taken off to retrieve and exploit a 1.5 million year ice core record from central Antarctica. Since the “oldest ice” is also inevitably most highly thinned, the introduction of novel technology for high-resolution ice core measurements becomes of special interest. The MSCA-IF project “GOLD-ICE” successfully accomplished taking a novel approach to establish laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) for ice core analysis at the Università Ca' Foscari Venezia (UNIVE). The novelty of the GOLD-ICE approach lies in the careful consideration of the potential and limitations to a paleo-climatic interpretation of LA-ICP-MS signals, in view of the ice core micro stratigraphy. Only so, misinterpretation of the novel micron-scale LA-ICP-MS signals is reliably avoided. Recent advances in the laser ablation community have turned LA-ICP-MS into a particularly powerful technique for producing high-resolution, artifact-free images of the chemical sample composition. Using this imaging technique for carefully mapping the spatial impurity distribution in ice core samples can provide important insights into the connection between the LA-ICP-MS signals and the ice crystal features. Such state-of-the-art imaging remained to be fully exploited for ice cores, thus far. GOLD-ICE has not only established a new LA-ICP-MS setup for refined glacio-chemical ice core analysis at UNIVE. The project has also, for the first time, demonstrated how the application of LA-ICP-MS for imaging the impurity distribution in ice cores can be refined and strongly improved. This next generation of LA-ICP-MS ice core analysis now offers scan speeds increased by one order of magnitude for single line profiles and the ability to map the localization of impurities with LA-ICP-MS at unsurpassed high spatial resolution (tens of microns). As a result, LA-ICP-MS ice core analysis has taken the step from 1D into 2D, making the close relationship between high-resolution LA-ICP-MS signals and the ice crystal matrix fully evident."

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

In order to prepare for future climate changes we need to understand the fundamental dynamics of our climate system. To this end it is crucial to understand the role of greenhouse gases in the past shift some 1.2 million years ago from 40k to 100k year periodicities dominating our climate system. Only studying the deepest, and oldest ice layers of Antarctica can provide us with an answer. However, the deepest layers are inevitably highly thinned, thus calling for ice core analysis at unprecedented detail. Succeeding where conventional cm-resolution melting techniques fail, Laser-Ablation Inductively-Coupled Plasma Mass Spectrometry (LA-ICP-MS) has recently started to emerge for glaciochemical analysis at sub-millimeter depth resolution. The project proposed here takes a novel approach to establish LA-ICP-MS for ice core analysis at the Università Ca' Foscari Venezia. Unique synergy exists for this purpose, based on the leading expertise in trace element ice core analysis of Professor Carlo Barbante at the Institute for the Dynamics of Environmental Processes and the state-of-the-art know-how in applying LA-ICP-MS to ice cores recently obtained by the proposer. LA-ICP-MS is an essentially non-destructive technique, and offers the opportunity to re-visit existing archive pieces from previous ice core drillings. In so doing, the project targets a two-fold application to investigate previously untapped paleoclimatic signals stored in the highly thinned deep layers of Antarctic ice cores. At the same time, a comprehensive view on potential limitations arising on this fine is integrated in its unique approach to avoid misinterpretation of the novel LA-ICP-MS signals. By this means, the project will fully unfold the potential of LA-ICP-MS for ice core analysis, opening new avenues of research in Europe at the forefront of future prestigious ice coring projects.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITA CA' FOSCARI VENEZIA · VeneziaКоординаторИталия