| 1. |
- Timmen, Ludger, et al.
(författare)
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Observing Fennoscandian Gravity Change by Absolute Gravimetry
- 2006
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Ingår i: International Association of Geodesy Symposia, Vol. 131, Geodetic Deformation Monitoring: From Geophysical to Engineering Roles. ; , s. 193-199
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- The Nordic countries Norway, Sweden, Denmark and Finland are a key study region for the research of glacial isostasy, and, in addition, it offers a unique opportunity for validating and testing the results of the GRACE experiment. Over a period of five years, the expected life time of GRACE, a temporal geoid variation of 3.0 mm is expected in the centre of the Fennoscandian land uplift area, corresponding to a gravity change of about 100 nm/s2. This is expected to be within the detection capabilities of GRACE. With terrestrial absolute gravimetry, the gravity change due to the land uplift can be observed with an accuracy of ±10 to 20 nm/s2 for a 5-year period. Thus, the terrestrial insitu observations (ground-truth) may be used to validate and test the GRACE results.Since 2003, absolute gravity measurements have been performed in Fennoscandia at about 30 stations covering Norway, Sweden, Finland and Denmark. Four groups with FG5 absolute gravimeters (BKG, FGI, IfE, UMB) are engaged to survey the uplift network annually by a mutually controlled procedure. Nearly all absolute stations are colocated with permanent GPS stations. From the 2003 and 2004 comparisons between the instruments, an overall accuracy of ±30 nm/s2 is indicated for a single absolute gravimeter and a single station determination. This is in full agreement with the project goal.
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| 2. |
- Christensen, Björn, et al.
(författare)
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Everything counts!
- 2015
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Ingår i: AStA Wirtschafts- und Sozialstatistisches Archiv. - : Springer Science and Business Media LLC. - 1863-8155 .- 1863-8163. ; 9:3-4, s. 215-232
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Tidskriftsartikel (refereegranskat)abstract
- Mit der Durchführung des Zensus 2011 ist die Bundesrepublik Deutschland ihrer Verpflichtung aus der EU-Verordnung 763/2008 vom 9. Juli 2008, eine Volkszählung nach festgelegten Kriterien durchzuführen, nachgekommen. Im Gegensatz zu früheren Volkszählungen (1987 BRD und 1981 DDR) wurde beim Zensus 2011 nicht auf eine Vollerhebung zurückgegriffen, sondern ein registergestütztes Verfahren verwendet. Für die Gemeinden stehen, durch die Veröffentlichung der Ergebnisse am 31.05.2013, unter anderem die amtlichen Bevölkerungszahlen zur Verfügung. Der Groß teil der Gemeinden sieht sich elementaren Verringerungen innerhalb ihres Einwohnerbestands gegenüber. Dieses Papier zeigt auf, dass Gemeinden unterhalb von 10.000 Einwohner signifikant geringere relative Verluste in den Einwohnerzahlen durch den Zensus 2011 im Vergleich zu Gemeinden mit mehr als 10.000 Einwohner aufweisen.
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| 3. |
- Christensen, Björn, et al.
(författare)
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Everything counts! : Warum kleine Gemeinden die Gewinner der Zensuserhebung 2011 sind
- 2015
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Ingår i: AStA Wirtschafts- und Sozialstatistisches Archiv. - : Springer Science and Business Media LLC. - 1863-8155 .- 1863-8163. ; 9:3-4, s. 215-232
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Tidskriftsartikel (refereegranskat)abstract
- Mit der Durchführung des Zensus 2011 ist die Bundesrepublik Deutschland ihrer Verpflichtung aus der EU-Verordnung 763/2008 vom 9. Juli 2008, eine Volkszählung nach festgelegten Kriterien durchzuführen, nachgekommen. Im Gegensatz zu früheren Volkszählungen (1987 BRD und 1981 DDR) wurde beim Zensus 2011 nicht auf eine Vollerhebung zurückgegriffen, sondern ein registergestütztes Verfahren verwendet. Für die Gemeinden stehen, durch die Veröffentlichung der Ergebnisse am 31.05.2013, unter anderem die amtlichen Bevölkerungszahlen zur Verfügung. Der Groß teil der Gemeinden sieht sich elementaren Verringerungen innerhalb ihres Einwohnerbestands gegenüber. Dieses Papier zeigt auf, dass Gemeinden unterhalb von 10.000 Einwohner signifikant geringere relative Verluste in den Einwohnerzahlen durch den Zensus 2011 im Vergleich zu Gemeinden mit mehr als 10.000 Einwohner aufweisen.
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| 4. |
- Enell, Carl-Fredrik, et al.
(författare)
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The Hotel Payload 2 campaign : Overview of NO, O and electron density measurements in the upper mesosphere and lower thermosphere
- 2011
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Ingår i: Journal of Atmospheric and Solar-Terrestrial Physics. - : Elsevier BV. - 1364-6826 .- 1879-1824. ; 73:14-15, s. 2228-2236
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Tidskriftsartikel (refereegranskat)abstract
- The ALOMAR eARI Hotel Payload 2 (HotPay 2) rocket campaign took place at Andoya Rocket Range, Norway, in January 2008. The rocket was launched on January 31, 2008 at 19:14 UT, when auroral activity appeared after a long geomagnetically quiet period. In this paper we present an overview of the HotPay 2 measurements of upper mesospheric and lower thermospheric (UMLT) electron, atomic oxygen (O) and nitric oxide (NO) densities. [O] and [NO] were retrieved from a set of three photometers, Night-Time Emissions from the Mesosphere and Ionosphere (NEMI). Faraday rotation receivers on the rocket and the EISCAT UHF incoherent scatter radar provided simultaneous electron density profiles, whereas the ALOMAR Na lidar and meteor radar measured the temperature profile and wind. The aurora was also observed with ground-based imagers. The retrieved oxygen number density profile has a maximum at 89 km, some 10 km lower than expected from earlier measurements and modelled profiles based on climatological averages (such as the MSIS model), and the retrieved NO densities are also lower than the expected. Satellite measurements indicate that subsidence over the winter pole controlled the densities. Quantitative chemistry model results based on climatological average atmospheric density and temperature profiles were, therefore, not in good agreement with the measured profiles. The Hotel Payload 2 measurements thus confirm the importance of downward transport from the thermosphere into the winter polar vortex.
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| 5. |
- Hansen, Lea B.S., et al.
(författare)
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A low-gluten diet induces changes in the intestinal microbiome of healthy Danish adults
- 2018
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Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723 .- 2041-1723. ; 9:1
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Tidskriftsartikel (refereegranskat)abstract
- © 2018, The Author(s). Adherence to a low-gluten diet has become increasingly common in parts of the general population. However, the effects of reducing gluten-rich food items including wheat, barley and rye cereals in healthy adults are unclear. Here, we undertook a randomised, controlled, cross-over trial involving 60 middle-aged Danish adults without known disorders with two 8-week interventions comparing a low-gluten diet (2 g gluten per day) and a high-gluten diet (18 g gluten per day), separated by a washout period of at least six weeks with habitual diet (12 g gluten per day). We find that, in comparison with a high-gluten diet, a low-gluten diet induces moderate changes in the intestinal microbiome, reduces fasting and postprandial hydrogen exhalation, and leads to improvements in self-reported bloating. These observations suggest that most of the effects of a low-gluten diet in non-coeliac adults may be driven by qualitative changes in dietary fibres.
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| 8. |
- Pötzelsberger, Elisabeth, et al.
(författare)
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Biotic threats for 23 major non-native tree species in Europe
- 2021
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Ingår i: Scientific Data. - : Nature Publishing Group. - 2052-4463. ; 8:1
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Tidskriftsartikel (refereegranskat)abstract
- For non-native tree species with an origin outside of Europe a detailed compilation of enemy species including the severity of their attack is lacking up to now. We collected information on native and non-native species attacking non-native trees, i.e. type, extent and time of first observation of damage for 23 important non-native trees in 27 European countries. Our database includes about 2300 synthesised attack records (synthesised per biotic threat, tree and country) from over 800 species. Insects (49%) and fungi (45%) are the main observed biotic threats, but also arachnids, bacteria including phytoplasmas, mammals, nematodes, plants and viruses have been recorded. This information will be valuable to identify patterns and drivers of attacks, and trees with a lower current health risk to be considered for planting. In addition, our database will provide a baseline to which future impacts on non-native tree species could be compared with and thus will allow to analyse temporal trends of impacts.
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