344 research outputs found
Acidification in the Cairngorms and Lochnagar: a palaeoecological assessment
No full textSensitive lakes in areas of the United Kingdom with moderate to high sulphur
deposition have been acidified since the middle of the nineteenth century- (Battarbee et al.
1988). Regions such as Galloway, south west Scotland (eg. Flower and Battarbee 1983,
Flower et al. 1987), Wales (eg. Battarbee et al. 1988, Fritz et aL 1990), Cumbria (eg.
Battarbee et al 1988, Atkinson and Haworth 1990), and Rannoch Moor in the central
Scottish Highlands (eg. Flower et al 1988) have been affected. This study extends the
geographical survey of lake acidification to the Caimgorm and Lochnagar regions of north
east Scotland (Figure 1). The Caimgorms and Lochnagar are areas of considerable
conservation value, forming the largest single area of land over 1000 m in the UK. The
Caimgorm mountain plateau is a National Nature Reserve, noted for its alpine flora and
fauna, whilst the Lochnagar range is a Scottish Wildlife Trust reserve.
A secondary- aim of the study was to evaluate the 11land-use 11 hypothesis (eg.
Rosenqvist 1977, 1978, 1981) as a mechanism for lake acidification by examining high
altitude sites with no active land-management. Sites selected are all remote, lie above the
tree line and have undisturbed catchments.
Lochnagar and the Caimgorms are situated on sensitive granite geology (Kinniburgh
and Edmunds 1986, Wells et al. 1986) in an area of moderate acid deposition (c. 0.95 g S
yr-1
). It can be predicted that sensitive lakes in this area (those having Ca2
+ values of <60
μeq i-1
) will have acidified (Battarbee 1989)
fmihpc/vlasiator: eVlasiator initial pre-release
No full textRelease used in publication
Vlasov simulation of electrons in the context of hybrid global models: an eVlasiator approach, M. Battarbee, T. Brito, M. Alho, Y. Pfau-Kempf, M. Grandin, U. ganse, K. Papadakis, A. Johlander, L. Turc, M. Dubart, and M. Palmroth. Ann. Geophys. 39, 85–103 (2021)
https://doi.org/10.5194/angeo-39-85-202
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Giving voice to equitable collaboration in participatory design
No full textAn AHRC funded research project titled Experimenting with the Co-experience Environment (June 2005 – June 2006) culminated in a physical environment designed in resonance with a small group of participants. The participants emerged from different disciplines coming together as a group to share their expertise and contribute their knowledge to design. They engaged in storytelling, individual and co-thinking, creating and co-creating, sharing ideas that did not require justification, proposed designs even though most were not designers …and played. The research questioned how a physical environment designed specifically for co-experiencing might contribute to new knowledge in design? Through play and by working in action together the participants demonstrated the potential of a physical co-experience environment to function as a scaffold for inter-disciplinary design thinking,saying, doing and making (Ivey & Sanders 2006). Ultimately the research questioned how this outcome might influence our approach to engaging participants in design research and experimentation
Raw Diatom data from Lateglacial to late Holocene from sediment core MLC from Moss Lake, Washington, USA
No full textDiatom preparation followed a standard procedure (Battarbee, 1986), and followed Renberg's (1990) recommendation of bulk preparation using a water-bath. Microspheres were added to each sample to determine diatom concentration (Battarbee and Kneen, 1982). The concentration of microspheres added was 2 ml of 5.01x10^6 per 0.01 g dry weight of sediment. The samples were then diluted, placed on a cover slip and mounted to the microscope slide using Naphrax®. Diatoms were identified and counted at 1000x magnification. Identification was aided by the website “Diatoms of the United States” (Spaulding, 2014) and identification keys (Krammer and Lange-Bertalot, 1991, 1999a,b). At least 300 diatom frustules were counted per slide
Climate variability in Europe and Africa during PAGES-PEPIII times stream II : a synthesis.
No full textThe PEP III Europe-Africa transect extends from the arctic fringes of NW Eurasia to South Africa. It encompasses the presently temperate sector of mid-latitude Europe, the Mediterranean region, the arid and semi-arid lands of the Sahara, Sahel and the Arabian Peninsula, and the inter-tropical belt of Africa. The palaeoenvironmental evidence available from these regions, which has been summarised in earlier chapters of this volume and which collectively spans the last 250,000 years, clearly bears the stamp of long-term global climate forcing induced by variations in solar insolation. External forcing is ultimately the reason why the Eurasian continental ice sheets waxed and waned repeatedly during the late Quaternary, and why the southerly limit of permafrost migrated southwards across mid-latitude Europe, periodically becoming degraded during warmer episodes. At the same time, pronounced fluctuations in atmospheric and soil moisture have affected the Mediterranean, desert and Sahel regions, while there is abundant evidence from every sector of the PEP III transect for marked migrations of the principal vegetation belts, as well as for other major environmental changes, that are also considered to reflect long-term climate forcing. It is only in the last decade or so, however, that the full complexity of the history of climate changes during the last interglacial-glacial cycle, and their environmental impacts in continental Europe and Africa, have begun to be recognised. The discovery of evidence for the abrupt Dansgaard-Oeschger (D-O) and Heinrich (H) climatic oscillations in Greenland ice-core (Johnsen et al. 1992) and North Atlantic (Bond et al. 1993) records, have prompted a re-examination of the continental record. This, together with a number of technical improvements in field and laboratory equipment, greater access to sites in remote and difficult terrain, diversification in the range of available palaeoecological and geochronological tools, and closer inter-disciplinary collaboration, have led to a more penetrating examination of the field evidence, which has progressed the science considerably. We can now see that the stratigraphical record is much more complex than appreciated hitherto, and more detailed and refined models of past climatic and environmental models are beginning to emerge. There is, for example, a growing body of evidence which suggests that D-O and H events had significant impacts on the environment of Europe and Africa, as well as on the Mediterranean Sea
M. Kernan, R.W. Battarbee and B.R. Moss (eds): Climate change Impacts on freshwater ecosystems, Wiley-Blackwell 2010 [Rezension]
No full textA late glacial and holocene record of biological and environmental changes from the crater Lake Albano, Central Italy: an interdisciplinary European project (Paliclas)
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Recovery of Lakes and Streams in the UK from Acid Rain. The United Kingdom Acid Waters Monitoring Network 20 year Interpretative Report
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