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Atmospheric Trends Above Finland:I Mesosphere and Thermosphere
Ionosphere global change evolution of the atmosphere ionosphere atmosphere interactions atmospheric composition and structure, atmosphere
2009/6/10
In the present study we analyse various long-term data series of measurements run by the
Sodankylä Geophysical Observatory for possible indications of cooling trends in the upper atmosphere.We r...
Predicting soil acidification trends at Plynlimon using the SAFE model
soil acidification trends Plynlimon SAFE model
2009/6/8
The SAFE model has been applied to an acid grassland site, located on base-poor stagnopodzol soils derived from Lower Palaeozoic greywackes. The model predicts that acidification of the soil has occur...
Trends and seasonality in stream water chemistry in two moorland catchments of the Upper River Wye, Plynlimon
stream water chemistry Upper River Wye moorland catchments
2009/6/8
Stream water chemistry in the Cyff and Gwy subcatchments within the headwaters of the River Wye has been monitored regularly since 1980. In the Gwy, which is a predominantly semi-natural grassland ca...
Acidification in Three Lake District Tarns：Historical Iong term trends and modelled future behaviour under changing sulphate and nitrate deposition
Acidification nitrate deposition sulphate
2009/6/8
Three upland Lake District Tarns, Scoat, Greendale and Burnmoor, have been evaluated using MAGIC (Model of Acidification of Groundwater In Catchments) to reconstruct past, present and future chemical ...
Throughfall and temporal trends of rainfall redistribution in an open tropical rainforest, south-western Amazonia (Rondônia, Brazil)
rainfall redistribution open tropical rainforest south-western Amazonia
2009/5/13
Throughfall volumes and incident rainfall were measured between 23 August and 2 December 2004 as well as from 6 January to 15 April 2005 for individual rain events of differing intensities and magnitu...
Defining the climatic signal in stream salinity trends using the Interdecadal Pacific Oscillation and its rate of change
Interdecadal Pacific Oscillation Interdecadal Pacific Oscillation
2009/5/8
The impact of landuse on stream salinity is currently difficult to separate from the effect of climate, as the decadal scale climatic cycles in groundwater and stream hydrology have similar wavelength...
The contribution of anthropogenic bromine emissions to past stratospheric ozone trends: a modelling study
anthropogenic bromine emissions stratospheric ozone trends modelling study
2009/5/6
Bromine compounds play an important role in the depletion of stratospheric ozone. We have calculated the changes in stratospheric ozone in response to changes in the halogen loading over the past deca...
Winter climate affects long-term trends in stream water nitrate in acid-sensitive catchments in southern Norway
Winter climate acid-sensitive catchments stream water nitrate
2009/4/29
Controls of stream water NO3 in mountainous and forested catchments are not thoroughly understood. Long-term trends in stream water NO3 are positive, neutral and negative, often apparently independent...
Modelling trends in OH radical concentrations using generalized additive models
Modelling trends OH radical concentrations generalized additive models
2009/3/31
During the TORCH campaign a zero dimensional box model based on the Master Chemical Mechanism was used to model concentrations of OH radicals. The model provided a close overall fit to measured concen...
Seasonality, water quality trends and biological responses in four streams in the Cairngorm Mountains, Scotland
hydrochemistry hydrology trends
2009/3/24
The chemical composition and invertebrate communities found in four streams in the Cairngorms, Scotland, were monitored between 1985-1997. Stream waters were mildly acidic (mean pH ca. 6.5), with low ...
Trends in the chemistry of atmospheric deposition and surface waters in the Lake Maggiore catchment
trend atmospheric deposition
2009/3/24
The Lake Maggiore catchment is the area of Italy most affected by acid deposition. Trend analysis was performed on long-term (15-30 years) series of chemical analyses of atmospheric deposition, four s...
Chemical trends at lakes and streams in the UK Acid Waters Monitoring Network, 1988-2000: Evidence for recent recovery at a national scale
acidification recovery long-term trends climate
2009/3/24
A detailed trend analysis of 12 years of data (1988-2000) for 22 surface waters in acid-sensitive regions of the United Kingdom, in which individual site data have been combined to identify national-s...
Trends in nitrogen deposition and leaching in acid-sensitive streams in Europe
Europe acid deposition nitrogen
2009/3/23
Long-term records of nitrogen in deposition and streamwater were analysed at 30 sites covering major acid sensitive regions in Europe. Large regions of Europe have received high inputs of inorganic ni...
Fitting and testing the significance of linear trends in Gumbel-distributed data
Extreme value probability distribution Gumbel distribution
2009/3/17
The widely-used hydrological procedures for calculating events with T-year return periods from data that follow a Gumbel distribution assume that the data sequence from which the Gumbel distribution i...
The oxidation efficiency of the troposphere is largely determined by the hydroxyl radical and its global distribution. Its presence limits the lifetime of most trace gases. Because of the great import...