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  • Springer Nature  (1,070,394)
  • American Physical Society  (663,490)
  • PANGAEA  (423,007)
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  • 1
    Publication Date: 2024-06-17
    Description: As global temperatures continue to rise, a key uncertainty of terrestrial carbon (C)–climate feedback is the rate of C loss upon abrupt permafrost thaw. This type of thawing—termed thermokarst—may in turn accelerate or dampen the response of microbial degradation of soil organic matter and carbon dioxide (CO2) release to climate warming. However, such impacts have not yet been explored in experimental studies. Here, by experimentally warming three thermo-erosion gullies in an upland thermokarst site combined with incubating soils from five additional thermokarst-impacted sites on the Tibetan Plateau, we investigate how warming responses of soil CO2 release would change upon upland thermokarst formation. Our results show that warming-induced increase in soil CO2 release is ~5.5 times higher in thermokarst features than the adjacent non-thermokarst landforms. This larger warming response is associated with the lower substrate quality and higher abundance of microbial functional genes for recalcitrant C degradation in thermokarst-affected soils. Taken together, our study provides experimental evidence that warming-associated soil CO2 loss becomes stronger upon abrupt permafrost thaw, which could exacerbate the positive soil C–climate feedback in permafrost-affected regions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 2
    Publication Date: 2024-06-17
    Description: Open-conduit basaltic volcanoes can be characterised by sudden large explosive events (paroxysms) that interrupt normal effusive and mild explosive activity. In June-August 2019, one major explosion and two paroxysms occurred at Stromboli volcano (Italy) within only 64 days. Here, via a multifaceted approach using clinopyroxene, we show arrival of mafic recharges up to a few days before the onset of these events and their effects on the eruption pattern at Stromboli, as a prime example of a persistently active, open-conduit basaltic volcano. Our data indicate a rejuvenated Stromboli plumbing system where the extant crystal mush is efficiently permeated by recharge magmas with minimum remobilisation promoting a direct linkage between the deeper and the shallow reservoirs that sustains the currently observed larger variability of eruptive behaviour. Our approach provides vital insights into magma dynamics and their effects on monitoring signals demonstrating the power of petrological studies in interpreting patterns of surficial activity.
    Description: Published
    Description: 7717
    Description: OSV1: Verso la previsione dei fenomeni vulcanici pericolosi
    Description: OSV2: Complessità dei processi vulcanici: approcci multidisciplinari e multiparametrici
    Description: JCR Journal
    Keywords: Stromboli volcano ; clinopyroxene ; paroxysmal activity ; Eruptive timescales ; Thermobarometry ; Petrology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2024-06-17
    Description: The aim of this paper is to investigate, through fnancial-statement analyzes, the economic fnancial performance of Italian hotels, after the international economic crisis, also con sidering the possible macro-regional diferences. The study focuses the fnancial state ments of 5473 hotels from 2009 to 2018. National data are also disaggregated in the three macro-areas that characterize Italy for diferent social and economic aspects. Anova test and Tukey–Kramer test are used. Results show that the crisis afected proftability. Ital ian hotels have a low capitalization, unable to cope with the large structural investments that require signifcant debts. The proftability indicators record similar trends in the three macro-areas, while the fnancial independence index and the coverage index show signif cant diferent values in the three observed areas. Therefore, in the digital era, Italian hotel industry has all the potential to restructure itself. Here fve ratios are considered to observe medium sized hotels. Future research with other variables will be useful, even on smaller hotels, and the analysis of their trends by cohorts of companies is necessary, as well as the integration of quantitative data with qualitative evidence. This paper encourages the cul ture of temporal sector comparison, re-evaluating the potential of accounting information systems, in order to promote data-based growth and development strategies. Furthermore, it contains indications for government ofcials, as well as for countries in the process of developing the hospitality sector following the example of the Italian experience.
    Description: Published
    Description: 383–407
    Description: OSA5: Energia e georisorse
    Description: N/A or not JCR
    Keywords: Italian hotels ; Tourism in Italy ; Economic-fnancial performance ; Crisis
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
    Publication Date: 2024-06-17
    Description: Two loess sections from the Upper Palaeolithic site of Kammern-Grubgraben (Lower Austria) were analysed to test geochemical proxies, as well as radiocarbon data of different components for their reliability and consistency in an archaeological context. Only a reliable basal age (28.9  27.8 ka cal BP) was obtained from charcoal fragments derived from a tundra gley underlying the archaeological horizons and assigned to Greenland Interstadials 3 or 4. Grain size, organic and inorganic geochemistry, and stable isotopes of the fine organic fraction (13Corg) and of rhizoconcretions (13C, 18O) were analysed to provide information on palaeoenvironmental conditions. Low-resolution geochemical and sedimentological analyses document a humidity-related variability, while 13Corg values indicate a predominant C3 vegetation. High-resolution elemental variations derived from X-ray fluorescence scanning exhibit increasing Ca and decreasing Fe and Ti values indicating drier conditions towards the top. Secondary pedogenic carbonate concretions provide post-sedimentary (Holocene) ages and are not suitable for assessing climate and environmental changes for the Palaeolithic.
    Keywords: 14C dating; Last Glacial Maximum; secondary carbonates; Stable isotopes; Upper Palaeolithic; XRF-core scanning
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 5
    Publication Date: 2024-06-17
    Keywords: DATE/TIME; Lagos_SL; SeaLevel; Sea level; South Atlantic Ocean; TGS; Tide gauge station; w9103; WOCE; World Ocean Circulation Experiment
    Type: Dataset
    Format: text/tab-separated-values, 39 data points
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  • 6
    Publication Date: 2024-06-17
    Description: This dataset includes counts, percentages and concentrations of all dinoflagellate cyst taxa identified in the benthic nephloid layer (BNL), cyst rain and surface sediments collected along a land-sea transect off Figueira da Foz (NW Portugal, Atlantic Iberian margin) during the Hydrographic Institute (IH)-HABWAVE cruise (16th-19th September 2019). Sampling of the dinoflagellate cyst community in the BNL, the water column (sediment trap) and the surface sediments (together with studies of spatio-temporal changes in physical properties) were carried out in order to investigate the dinoflagellate cyst distribution and the factors (physical and biological) affecting it. Water samples for cyst analyses were collected by a rosette firing system associated with the CTD, and the cyst rain using a sediment trap situated above the BNL. They were filtered (40-47 l) on board through a 150µm-nylon mesh sieve onto a 10µm-calibrated stainless steel sieve (Retsch). In the laboratory, cysts were concentrated by centrifugation. Full and empty cysts were counted to investigate whether a reservoir of viable cysts existed in the BNL. Surface sediments were sampled with a Smith McIntyre grab and using Plexiglass tubes (3.6 cm internal diameter) that were inserted in the sediment to recover the top 1-cm layer. Cysts from sediments were concentrated by density separation with sodium polytungstate (2.016 g/ml).
    Keywords: Benthic nepheloid layer; Coastal dynamics; Dinoflagellate cysts; NW portuguese margin; surface sediments
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 7
    Publication Date: 2024-06-17
    Keywords: DATE/TIME; Lagos_SL; SeaLevel; Sea level; South Atlantic Ocean; TGS; Tide gauge station; w9103; WOCE; World Ocean Circulation Experiment
    Type: Dataset
    Format: text/tab-separated-values, 2728 data points
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  • 8
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    PANGAEA
    In:  Sea Level Center, University of Hawaii
    Publication Date: 2024-06-17
    Keywords: Comment; DATE/TIME; Lagos_SL; SeaLevel; Sea level; South Atlantic Ocean; TGS; Tide gauge station; w9103; WOCE; World Ocean Circulation Experiment
    Type: Dataset
    Format: text/tab-separated-values, 120 data points
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  • 9
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    PANGAEA
    In:  Sea Level Center, University of Hawaii
    Publication Date: 2024-06-17
    Keywords: DATE/TIME; Lagos_SL; SeaLevel; Sea level; South Atlantic Ocean; TGS; Tide gauge station; w9103; WOCE; World Ocean Circulation Experiment
    Type: Dataset
    Format: text/tab-separated-values, 205 data points
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  • 10
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    PANGAEA
    In:  Sea Level Center, University of Hawaii
    Publication Date: 2024-06-17
    Keywords: DATE/TIME; Lagos_SL; SeaLevel; Sea level; South Atlantic Ocean; TGS; Tide gauge station; w9103; WOCE; World Ocean Circulation Experiment
    Type: Dataset
    Format: text/tab-separated-values, 181 data points
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