LIVIVO - Search results -

Search results

Result 1 - 10 of total 33

Search options

Book ; Online: Drivers of late Holocene ice core chemistry in Dronning Maud Land

Winton, V. Holly L. / Mulvaney, Robert / Savarino, Joel / Clem, Kyle R. / Frey, Markus M.

eISSN: 1814-9332

The context for the ISOL-ICE project

2023

Abstract: Quantifying the natural variability of the stratospheric ozone layer and understanding the underlying factors that control natural total column ozone (TCO) variability are required to put modern observations into historical context and evaluate the ... ...

Abstract	Quantifying the natural variability of the stratospheric ozone layer and understanding the underlying factors that control natural total column ozone (TCO) variability are required to put modern observations into historical context and evaluate the effectiveness of climate and TCO protection policies. Within the framework of the Isotopic Constraints on Past Ozone Layer in Polar Ice (ISOL-ICE) project, we present initial ice core results from the new ISOL-ICE ice core covering the last millennium from the high-elevation Dronning Maud Land (DML) located under the Antarctic spring stratospheric TCO minimum, and discuss the implications for interpreting the stable isotopic composition of nitrogen in ice core nitrate ( δ 15 N(NO 3 - )) as a surface ultra-violet radiation (UV) and TCO proxy. To interpret the ice core δ 15 N(NO 3 - ) record, an understanding of past snow accumulation changes, as well as aerosol source regions and present-day drivers of their variability are required. We therefore report here the ice core age-depth model, the snow accumulation and ice chemistry records, and correlation analysis of these records with climate variables over the observational era (1979–2016). The ISOL-ICE ice core covers the last 1349 years from 668 to 2017 C.E. ± 3 years extending previous ice core records from the region by two decades and shows excellent reproducibility with those records. The extended ISOL-ICE record of last two decades showed a continuation of the methanesulphonate (MSA) increase from ~1800 to present while there were less frequent large deposition events of sea salts relative to the last millennium. The correlation analysis, combined with the finding that sea salts do not carry a sea ice signature to the site, highlight that sea salt and MSA aerosol concentrations are primarily related to atmospheric transport over the extended two-decade period and not to changes in sea ice source strength. Correlation of the snow accumulation record with climate variables over the observational era showed that ...
Subject code	333 ; 290
Language	English
Publishing date	2023-12-05
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Increasing Accumulation of Perfluorocarboxylate Contaminants Revealed in an Antarctic Firn Core (1958-2017).

Garnett, Jack / Halsall, Crispin / Winton, Holly / Joerss, Hanna / Mulvaney, Robert / Ebinghaus, Ralf / Frey, Markus / Jones, Anna / Leeson, Amber / Wynn, Peter

Environmental science & technology

2022 Volume 56, Issue 16, Page(s) 11246–11255

Abstract: Perfluoroalkyl acids (PFAAs) are synthetic chemicals with a variety of industrial and consumer applications that are now widely distributed in the global environment. Here, we report the measurement of six perfluorocarboxylates (PFCA, ... ...

Abstract	Perfluoroalkyl acids (PFAAs) are synthetic chemicals with a variety of industrial and consumer applications that are now widely distributed in the global environment. Here, we report the measurement of six perfluorocarboxylates (PFCA, C
MeSH term(s)	Antarctic Regions ; Arctic Regions ; Environmental Monitoring ; Fluorocarbons/analysis ; Snow/chemistry ; Water Pollutants, Chemical/analysis
Chemical Substances	Fluorocarbons ; Water Pollutants, Chemical
Language	English
Publishing date	2022-07-26
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.2c02592
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Increasing Accumulation of Perfluorocarboxylate Contaminants Revealed in an Antarctic Firn Core (1958–2017)

Garnett, Jack / Halsall, Crispin / Winton, Holly / Joerss, Hanna / Mulvaney, Robert / Ebinghaus, Ralf / Frey, Markus / Jones, Anna / Leeson, Amber / Wynn, Peter

Environmental science & technology. 2022 July 26, v. 56, no. 16

2022

Abstract	Perfluoroalkyl acids (PFAAs) are synthetic chemicals with a variety of industrial and consumer applications that are now widely distributed in the global environment. Here, we report the measurement of six perfluorocarboxylates (PFCA, C₄–C₉) in a firn (granular compressed snow) core collected from a non-coastal, high-altitude site in Dronning Maud Land in Eastern Antarctica. Snow accumulation of the extracted core dated from 1958 to 2017, a period coinciding with the advent, use, and geographical shift in the global industrial production of poly/perfluoroalkylated substances, including PFAA. We observed increasing PFCA accumulation in snow over this time period, with chemical fluxes peaking in 2009–2013 for perfluorooctanoate (PFOA, C₈) and nonanoate (PFNA, C₉) with little evidence of a decline in these chemicals despite supposed recent global curtailments in their production. In contrast, the levels of perfluorobutanoate (PFBA, C₄) increased markedly since 2000, with the highest fluxes in the uppermost snow layers. These findings are consistent with those previously made in the Arctic and can be attributed to chlorofluorocarbon replacements (e.g., hydrofluoroethers) as an inadvertent consequence of global regulation.
Keywords	altitude ; chlorofluorocarbons ; environmental science ; perfluorocarbons ; perfluorooctanoic acid ; snow ; technology ; Antarctic region ; Antarctica ; Arctic region
Language	English
Dates of publication	2022-0726
Size	p. 11246-11255.
Publishing place	American Chemical Society
Document type	Article
ISSN	1520-5851
DOI	10.1021/acs.est.2c02592
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Author Correction: Wilkes subglacial basin ice sheet response to Southern Ocean warming during late Pleistocene interglacials.

Crotti, Ilaria / Quiquet, Aurélien / Landais, Amaelle / Stenni, Barbara / Wilson, David J / Severi, Mirko / Mulvaney, Robert / Wilhelms, Frank / Barbante, Carlo / Frezzotti, Massimo

Nature communications

2022 Volume 13, Issue 1, Page(s) 6380

Language	English
Publishing date	2022-10-26
Publishing country	England
Document type	Published Erratum
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-022-34002-4
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Wilkes subglacial basin ice sheet response to Southern Ocean warming during late Pleistocene interglacials.

Crotti, Ilaria / Quiquet, Aurélien / Landais, Amaelle / Stenni, Barbara / Wilson, David J / Severi, Mirko / Mulvaney, Robert / Wilhelms, Frank / Barbante, Carlo / Frezzotti, Massimo

Nature communications

2022 Volume 13, Issue 1, Page(s) 5328

Abstract: The response of the East Antarctic Ice Sheet to past intervals of oceanic and atmospheric warming is still not well constrained but is critical for understanding both past and future sea-level change. Furthermore, the ice sheet in the Wilkes Subglacial ... ...

Abstract	The response of the East Antarctic Ice Sheet to past intervals of oceanic and atmospheric warming is still not well constrained but is critical for understanding both past and future sea-level change. Furthermore, the ice sheet in the Wilkes Subglacial Basin appears to have undergone thinning and ice discharge events during recent decades. Here we combine glaciological evidence on ice sheet elevation from the TALDICE ice core with offshore sedimentological records and ice sheet modelling experiments to reconstruct the ice dynamics in the Wilkes Subglacial Basin over the past 350,000 years. Our results indicate that the Wilkes Subglacial Basin experienced an extensive retreat 330,000 years ago and a more limited retreat 125,000 years ago. These changes coincide with warmer Southern Ocean temperatures and elevated global mean sea level during those interglacial periods, confirming the sensitivity of the Wilkes Subglacial Basin ice sheet to ocean warming and its potential role in sea-level change.
MeSH term(s)	Antarctic Regions ; Ice Cover ; Oceans and Seas ; Temperature
Language	English
Publishing date	2022-09-10
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-022-32847-3
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere.

Liu, Pengfei / Kaplan, Jed O / Mickley, Loretta J / Li, Yang / Chellman, Nathan J / Arienzo, Monica M / Kodros, John K / Pierce, Jeffrey R / Sigl, Michael / Freitag, Johannes / Mulvaney, Robert / Curran, Mark A J / McConnell, Joseph R

Science advances

2021 Volume 7, Issue 22

Abstract: Fire plays a pivotal role in shaping terrestrial ecosystems and the chemical composition of the atmosphere and thus influences Earth's climate. The trend and magnitude of fire activity over the past few centuries are controversial, which hinders ... ...

Abstract	Fire plays a pivotal role in shaping terrestrial ecosystems and the chemical composition of the atmosphere and thus influences Earth's climate. The trend and magnitude of fire activity over the past few centuries are controversial, which hinders understanding of preindustrial to present-day aerosol radiative forcing. Here, we present evidence from records of 14 Antarctic ice cores and 1 central Andean ice core, suggesting that historical fire activity in the Southern Hemisphere (SH) exceeded present-day levels. To understand this observation, we use a global fire model to show that overall SH fire emissions could have declined by 30% over the 20th century, possibly because of the rapid expansion of land use for agriculture and animal production in middle to high latitudes. Radiative forcing calculations suggest that the decreasing trend in SH fire emissions over the past century largely compensates for the cooling effect of increasing aerosols from fossil fuel and biofuel sources.
Language	English
Publishing date	2021-05-28
Publishing country	United States
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
ZDB-ID	2810933-8
ISSN	2375-2548 ; 2375-2548
ISSN (online)	2375-2548
ISSN	2375-2548
DOI	10.1126/sciadv.abc1379
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Hemispheric black carbon increase after the 13th-century Māori arrival in New Zealand.

McConnell, Joseph R / Chellman, Nathan J / Mulvaney, Robert / Eckhardt, Sabine / Stohl, Andreas / Plunkett, Gill / Kipfstuhl, Sepp / Freitag, Johannes / Isaksson, Elisabeth / Gleason, Kelly E / Brugger, Sandra O / McWethy, David B / Abram, Nerilie J / Liu, Pengfei / Aristarain, Alberto J

Nature

2021 Volume 598, Issue 7879, Page(s) 82–85

Abstract: New Zealand was among the last habitable places on earth to be colonized by ... ...

Abstract	New Zealand was among the last habitable places on earth to be colonized by humans
MeSH term(s)	Atmosphere/chemistry ; Biomass ; Fires/history ; History, 15th Century ; History, 16th Century ; History, Medieval ; Human Activities/history ; Humans ; Native Hawaiian or Other Pacific Islander/history ; New Zealand ; Soot/analysis ; Tasmania
Chemical Substances	Soot
Language	English
Publishing date	2021-10-06
Publishing country	England
Document type	Historical Article ; Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-021-03858-9
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 26: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MG 9: Show issues
Zs.MO 244: Show issues

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: Leibniz and American personalism

Mulvaney, Robert J

Nihil sine ratione , p. 854-860

2001 , Page(s) 854–860

Document type	Article
Database	Former special subject collection: coastal and deep sea fishing

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾

Book ; Online: Spatial and temporal distributions of surface mass balance between Concordia and Vostok stations, Antarctica, from combined radar and ice core data

Meur, Emmanuel / Magand, Olivier / Arnaud, Laurent / Fily, Michel / Frezzotti, Massimo / Cavitte, Marie / Mulvaney, Robert / Urbini, Stefano

eISSN: 1994-0424

first results and detailed error analysis

2019

Abstract: Results from ground-penetrating radar (GPR) measurements and shallow ice cores carried out during a scientific traverse between Dome Concordia (DC) and Vostok stations are presented in order to infer both spatial and temporal characteristics of snow ... ...

Abstract	Results from ground-penetrating radar (GPR) measurements and shallow ice cores carried out during a scientific traverse between Dome Concordia (DC) and Vostok stations are presented in order to infer both spatial and temporal characteristics of snow accumulation over the East Antarctic Plateau. Spatially continuous accumulation rates along the traverse are computed from the identification of three equally spaced radar reflections spanning about the last 600 years. Accurate dating of these internal reflection horizons (IRHs) is obtained from a depth–age relationship derived from volcanic horizons and bomb testing fallouts on a DC ice core and shows a very good consistency when tested against extra ice cores drilled along the radar profile. Accumulation rates are then inferred by accounting for density profiles down to each IRH. For the latter purpose, a careful error analysis showed that using a single and more accurate density profile along a DC core provided more reliable results than trying to include the potential spatial variability in density from extra (but less accurate) ice cores distributed along the profile. The most striking feature is an accumulation pattern that remains constant through time with persistent gradients such as a marked decrease from 26 mm w.e. yr −1 at DC to 20 mm w.e. yr −1 at the south-west end of the profile over the last 234 years on average (with a similar decrease from 25 to 19 mm w.e. yr −1 over the last 592 years). As for the time dependency, despite an overall consistency with similar measurements carried out along the main East Antarctic divides, interpreting possible trends remains difficult. Indeed, error bars in our measurements are still too large to unambiguously infer an apparent time increase in accumulation rate. For the proposed absolute values, maximum margins of error are in the range 4 mm w.e. yr −1 (last 234 years) to 2 mm w.e. yr −1 (last 592 years), a decrease with depth mainly resulting from the time-averaging when computing accumulation rates.
Subject code	333 ; 511
Language	English
Publishing date	2019-01-11
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Book ; Online: Magnitude, frequency and climate forcing of global volcanism during the last glacial period as seen in Greenland and Antarctic ice cores (60–9 ka)

Lin, Jiamei / Svensson, Anders / Hvidberg, Christine S. / Lohmann, Johannes / Kristiansen, Steffen / Dahl-Jensen, Dorthe / Steffensen, Jørgen Peder / Rasmussen, Sune Olander / Cook, Eliza / Kjær, Helle Astrid / Vinther, Bo M. / Fischer, Hubertus / Stocker, Thomas / Sigl, Michael / Bigler, Matthias / Severi, Mirko / Traversi, Rita / Mulvaney, Robert

eISSN: 1814-9332

2022

Abstract: Large volcanic eruptions occurring in the last glacial period can be detected by their accompanying sulfuric acid deposition in continuous ice cores. Here we employ continuous sulfate and sulfur records from three Greenland and three Antarctic ice cores ... ...

Abstract	Large volcanic eruptions occurring in the last glacial period can be detected by their accompanying sulfuric acid deposition in continuous ice cores. Here we employ continuous sulfate and sulfur records from three Greenland and three Antarctic ice cores to estimate the emission strength, the frequency and the climatic forcing of large volcanic eruptions that occurred during the second half of the last glacial period and the early Holocene, 60–9 kyr before 2000 CE ( b2k ). Over most of the investigated interval the ice cores are synchronized, making it possible to distinguish large eruptions with a global sulfate distribution from eruptions detectable in one hemisphere only. Due to limited data resolution and large variability in the sulfate background signal, particularly in the Greenland glacial climate, we only list Greenland sulfate depositions larger than 20 kg km −2 and Antarctic sulfate depositions larger than 10 kg km −2 . With those restrictions, we identify 1113 volcanic eruptions in Greenland and 737 eruptions in Antarctica within the 51 kyr period – for which the sulfate deposition of 85 eruptions is found at both poles (bipolar eruptions). Based on the ratio of Greenland and Antarctic sulfate deposition, we estimate the latitudinal band of the bipolar eruptions and assess their approximate climatic forcing based on established methods. A total of 25 of the identified bipolar eruptions are larger than any volcanic eruption occurring in the last 2500 years, and 69 eruptions are estimated to have larger sulfur emission strengths than the Tambora, Indonesia, eruption (1815 CE). Throughout the investigated period, the frequency of volcanic eruptions is rather constant and comparable to that of recent times. During the deglacial period (16–9 ka b2k ), however, there is a notable increase in the frequency of volcanic events recorded in Greenland and an obvious increase in the fraction of very large eruptions. For Antarctica, the deglacial period cannot be distinguished from other periods. This confirms the suggestion that the isostatic unloading of the Northern Hemisphere (NH) ice sheets may be related to the enhanced NH volcanic activity. Our ice-core-based volcanic sulfate records provide the atmospheric sulfate burden and estimates of climate forcing for further research on climate impact and understanding the mechanism of the Earth system.
Subject code	550 ; 333
Language	English
Publishing date	2022-03-15
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

Your last searches

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Inter-library loan at ZB MED