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1.	Andiman, W, et al. (author) The mode of delivery and the risk of vertical transmission of human immunodeficiency virus type 1--a meta-analysis of 15 prospective cohort studies 1999 In: The New England journal of medicine. - 0028-4793. ; 340:13, s. 977-987 Journal article (peer-reviewed)
2.	Ammann, B, et al. (author) The Würmian Late-glacial in lowland Switzerland 1994 In: Journal of Quaternary Science. - : Wiley. - 0267-8179 .- 1099-1417. ; 9:2, s. 119-125 Journal article (peer-reviewed)abstract A synthesis is provided of Late-glacial (14-9 ka BP) environmental changes in lowland Switzerland (the 'Swiss Plateau'). The chronology of deglaciation and subsequent developments in vegetation cover in the area are summarised. The sequence of climatic variations experienced in the region during the Late-glacial is then described and a curve representing the main palaeotemperature variations is presented.
3.	Brehm, Nicolas, et al. (author) Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE 2022 In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 13:1 Journal article (peer-reviewed)abstract The Sun sporadically produces eruptive events leading to intense fluxes of solar energetic particles (SEPs) that dramatically disrupt the near-Earth radiation environment. Such events have been directly studied for the last decades but little is known about the occurrence and magnitude of rare, extreme SEP events. Presently, a few events that produced measurable signals in cosmogenic radionuclides such as 14C, 10Be and 36Cl have been found. Analyzing annual 14C concentrations in tree-rings from Switzerland, Germany, Ireland, Russia, and the USA we discovered two spikes in atmospheric 14C occurring in 7176 and 5259 BCE. The ~2% increases of atmospheric 14C recorded for both events exceed all previously known 14C peaks but after correction for the geomagnetic field, they are comparable to the largest event of this type discovered so far at 775 CE. These strong events serve as accurate time markers for the synchronization with floating tree-ring and ice core records and provide critical information on the previous occurrence of extreme solar events which may threaten modern infrastructure.

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Type of publication: journal article (3)

Type of content: peer-reviewed (3)

Author/Editor: Giaquinto, C (1); Gabiano, C (1); Mur, A (1); de Jose, I (1); Grosch-Worner, I (1); Nadal, D (1); show more...; Wyler, CA (1); Kind, C (1); Rudin, C (1); Cheseaux, JJ (1); Aebi, C (1); Wu, M. (1); Farley, J. (1); Thomas, P. (1); Keller, M. (1); Thomas, D. (1); Guichard, A. (1); Palla, G. (1); Cooper, E (1); De Maria, A (1); De Rossi, A (1); Diaz, C. (1); Ellis, S. (1); Levine, M (1); Hanson, C (1); Romano, A (1); Mcdonald, D. (1); Clark, S (1); Nielsen, K. (1); Levy, J (1); Mechinaud, F (1); Nicolas, J (1); Mazza, A (1); Duse, M (1); Cellini, M (1); Caselli, D (1); Guarino, A (1); Osimani, P (1); Scherpbier, H (1); Bohlin, A (1); Mok, J (1); Perrin, L (1); Gianinazzi, M. (1); Brunelli, A (1); Ho, D (1); Riva, C (1); Rogers, M (1); Koup, R (1); Zara, C (1); Adolphi, Florian (1); show less...

University: Lund University (1); Linnaeus University (1); Karolinska Institutet (1)

Language: English (3)

Research subject (UKÄ/SCB): Natural sciences (1)

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