Institution
University of Iceland
Education•Reykjavik, Suðurnes, Iceland•
About: University of Iceland is a education organization based out in Reykjavik, Suðurnes, Iceland. It is known for research contribution in the topics: Population & Genome-wide association study. The organization has 5423 authors who have published 16199 publications receiving 694762 citations. The organization is also known as: Háskóli Íslands.
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TL;DR: In this article, a 30-minute total grainsize distribution based on both ground and MSG-SEVIRI satellite measurements is characterized by Mdphi of about 2 phi and a fine-ash content of about 30wt%.
Abstract: The April-May 2010 eruption of Eyjafjallajokull volcano (Iceland) was characterized by a nearly continuous injection of tephra in the atmosphere that affected various economic sectors in Iceland and caused a global-wide interruption of air traffic. Eruptive activity during 4-8 May 2010 was characterized based on short-duration physical parameters in order to capture transient eruptive behavior of a long-lasting eruption (i.e., total grainsize distribution, erupted mass and mass eruption rate averaged over 30-minute activity). Resulting 30-minute total grainsize distribution based on both ground and MSG-SEVIRI satellite measurements is characterized by Mdphi of about 2 phi and a fine-ash content of about 30wt%. Accumulation rate varied by two orders of magnitude with an exponential decay away from the vent, whereas Mdphi shows a linear increase until about 18 km from vent reaching a plateau of about 4.5 phi between 20-56 km. Associated mass eruption rate is in between 0.6-1.2 x 10^5 kg s^-1. In-situ sampling showed how fine ash mainly fell as aggregates of various typologies. About 5 to 9 wt% of the erupted mass remained in the cloud up to 1000 km from the vent, suggesting that nearly half of the ash >7 phi settled as aggregates within the first 60 km. Particle sphericity and shape factor varied between 0.4 and 1 with no clear correlation with size and distance from vent. Our experiments also demonstrate how satellite retrievals and Doppler radar grainsize detection can provide real-time description of the source term but for a limited particle-size range.
156 citations
Duke University1, Karolinska Institutet2, Université de Montréal3, Rutgers University4, University of North Carolina at Chapel Hill5, Norwegian Institute of Public Health6, National Cheng Kung University7, Social Insurance Institution8, University of Bordeaux9, University of Southern Denmark10, University of South Australia11, University of Iceland12, University of New South Wales13, Utrecht University14, Li Ka Shing Faculty of Medicine, University of Hong Kong15, University of Melbourne16, University of Hong Kong17, University College London18
TL;DR: The results show increases over time but large variations in ADHD medication use in multiple regions, particularly in adults.
156 citations
TL;DR: Based on studies of the microbicidal activities of lipids, the possibility of using such lipids as active ingredients in prophylactic and therapeutic dosage forms is considered and examples are given of studies of such pharmaceutical dosage forms in experimental animal models and in clinical trials.
155 citations
TL;DR: In this article, the authors investigated the effect of the COVID-19 pandemic on mental health and substance use during this sensitive developmental stage and found that the decrease observed in substance use might be an unintended benefit of isolation, and might serve as a protective factor against future substance use disorders and dependence.
155 citations
TL;DR: A combination of spatial ICA with spectral Bayesian positive source (BPSS) with a rough classification of pixels is proposed, which allows selection of small, but relevant, number of pixels for the component extraction and consequently the endmember classification.
155 citations
Authors
Showing all 5561 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Albert Hofman | 267 | 2530 | 321405 |
| Kari Stefansson | 206 | 794 | 174819 |
| Ronald Klein | 194 | 1305 | 149140 |
| Eric Boerwinkle | 183 | 1321 | 170971 |
| Unnur Thorsteinsdottir | 167 | 444 | 121009 |
| Vilmundur Gudnason | 159 | 837 | 123802 |
| Hakon Hakonarson | 152 | 968 | 101604 |
| Bernhard O. Palsson | 147 | 831 | 85051 |
| Andrew T. Hattersley | 146 | 768 | 106949 |
| Fernando Rivadeneira | 146 | 628 | 86582 |
| Rattan Lal | 140 | 1383 | 87691 |
| Jonathan G. Seidman | 137 | 563 | 89782 |
| Christine E. Seidman | 134 | 519 | 67895 |
| Augustine Kong | 134 | 237 | 89818 |
| Timothy M. Frayling | 133 | 500 | 100344 |