Meteorological data for Lochnagar 1996-2000

This report summarises the meteorological data collected from the A WS from September 1996 (the first full month of data) through to December 2000. The report is in three sections. Section 1 deals with daily summary data and includes mean, minimum and maximum values for each measured parameter (except wind direction), together a daily rainfall amount. Following these tables the daily data are shown graphically for each year, with mean, minimum and maximum of air temperature and wind speed shown on a single figure for each calendar year. This is followed by annual graphs for daily rainfall, relative humidity and air pressure. Section 2 is concerned with monthly data. Monthly figures (mean, minimum and maximum) for each parameter are given together with a monthly total rainfall and a count of the number of days on which rain fell. This is followed by monthly wind direction data, shown as a series of wind roses. Wind direction is given as a percentage frequency. Each calendar year is presented on a single page. Section 3 finally, and briefly, gives annual summaries for each parameter for 1997 - 2000 with the caveat that data from 2000 are incomplete due to the power failure in the logger

A method for the extraction of carbonaceous particles from lake sediment

Lake sediments provide a record of atmospheric contamination and so have been imponant in recent studies on surfacc water acidification. Carbonaceous panicles derived from fossil-fuel combustion arc found in considerable numbers in upper levels of sediment cores taken from areas with high acid deposition (Griffen & Goldbcrg 1981. Renberg & Wik 1984). Sites in the United Kingdom show close correlation between the onset of atmospheric contamination as indicated by carbonaceous paniclcs. heavy metals and magnetic deposition, and the acidification of lakes as indicated by diatom analysis (Bauarbee et al. 1988)

An extraction technique for mineral ash particles in lake sediment

Lake sediments provide a record of aunospheric contamination and have been important in recent studies of lake acidification. Carbonaceous and mineral ash particles derived from fossilfuel combustion are found in considerable numbers in upper levels of lake sediment cores taken from areas with high acid deposition. Sites in the United Kingdom show close correlation between the onset of aunospheric contamination as indicated by carbonaeeous particles, heavy metals and magnetic deposition and the acidification of lakes as indicated by diatom analysis (Battarbee et al. 1988). Studies in progress seek to examine the aunospheric record provided by mineral ash spheres in lake sediments

A preliminary data report of analyses on lake sediment cores from Loch Coire nan Arr

This report is a presentation of the data resulting from analyses of lake sediment cores taken from Loch Caire nan Arr in February 1994 under contract RC01513. No interpretation of the data is offered here as this will be covered in a future report once the radioisotope chronology data from the master core (CNA 9) has been made available. Until such time any interpretation and date allocation would be incomplete

Fly-ash particles in lake sediments: extraction and characterisation. Report to the CEGB

Fly-ash particles are produced by high temperature combustion of coal and oil. They are dispersed widely in the environment, despite the presence of electrostatic precipitators on coal-fired station chimneys

An assessment of sediment chronologies for 35 lakes in Ireland based on skeleton spheroidal carbonaceous particle profiles

Five samples from each of 35 sediment cores were received for SCP analysis in order to determine an estimate for 1850 and if possible a rough sediment chronology for each core

Mercury pollution in the lake sediments and catchment soils of anthropogenically-disturbed sites across England

Sediment cores and soil samples were taken from nine lakes and their catchments across England with varying degrees of direct human disturbance. Mercury (Hg) analysis demonstrated a range of impacts, many from local sources, resulting from differing historical and contemporary site usage and management. Lakes located in industrially important areas showed clear evidence for early Hg pollution with concentrations in sediments reaching 400–1600 ng g−1 prior to the mid-19th century. Control of inputs resulting from local management practices and a greater than 90% reduction in UK Hg emissions since 1970 were reflected by reduced Hg pollution in some lakes. However, having been a sink for Hg deposition for centuries, polluted catchment soils are now the major Hg source for most lakes and consequently recovery from reduced Hg deposition is being delayed