@article {60,
	title = {Synchronous trends in N-NO3 export from N-saturated river catchments in relation to climate},
	journal = {Biogeochemistry},
	volume = {86},
	year = {2007},
	pages = {251-268},
	abstract = {Long term trends (1978{\textendash}2005) of N{\textendash}NO3 concentrations in river water were investigated for 10 rivers draining forested catchments in Piedmont, North-Western Italy, and Canton Ticino, Switzerland. All the river catchments come into the category of the medium-high stage of N saturation (levels 2{\textendash}3 of the Stoddard{\textquoteright}s classification). The seasonal signal in N{\textendash}NO3 concentrations and its changes in time over the course of the study period was also evaluated. Single trends were analysed for significance and magnitude; statistical techniques for the detection of common trends were then applied to identify a common pattern in the N{\textendash}NO3 time series. Both the increasing NO3 levels and the limited seasonal pattern in recent years indicate an aggrading level of N saturation in time. Synchronous trends of N{\textendash}NO3 export were found for 8 rivers. The main common trend was used to test relationships with: (i) temperature, (ii) precipitation, and (iii) N deposition.
Step-changes in the data series were also assessed, and the main points of change are discussed in relation to meteorological factors and response to the N saturation status. Temperature proved to be the main factor affecting the temporal pattern of N{\textendash}NO3 concentrations: warm periods were usually followed by an N{\textendash}NO3 increase in river water due to enhanced mineralisation and nitrification in soil.},
	keywords = {Climate, Nitrate, Nitrogen saturation, Northern Italy, Trend, Water chemistry},
	author = {Rogora M.}
}
@article {62,
	title = {The water chemistry of Northern Patagonian lakes and their nitrogen status in comparison with remote lakes in different regions of the globe},
	journal = {J. Limnol. },
	volume = {67},
	year = {2008},
	pages = {75-86},
	abstract = {Eighteen small shallow lakes located in the Northern Patagonian Lake District, in southern South America, were sampled in
2001 and analysed for the main chemical variables (pH, conductivity, alkalinity, major ions and nutrients). The study lakes span a
wide geographical and altitudinal range and belong partly to the Pacific and partly to the Atlantic watershed. The main aim of this
study was to investigate the relationships between water chemistry and physical/geographical properties of these lakes. Secondly, the
nitrogen content of the lakes was considered in detail, and results compared to those obtained in previous studies carried out in other
remote areas of the globe (the Central Southern Alps in Italy, the Sierra da Estrela region in Portugal, the Svalbard Islands in the
Arctic, the Khumbu-Himal region in Nepal, and the Terra Nova Bay area in Antarctica). In the Alps, lakes are characterised by
markedly high nitrogen concentrations, manly as nitrate, due to the high inputs of nitrogen compounds from downwind sources like
the Po Plain in Northern Italy. Conversely, lakes at remote locations such as the Andes, Antarctica and Himalaya are characterised
by a low nitrogen content, mainly as organic nitrogen. This status is related to the limited atmospheric inputs of nitrogen affecting
these regions.},
	keywords = {Alps, Antarctica, atmospheric deposition, Nepal, Nitrate},
	author = {Rogora, M and Massaferro J. and Marchetto A. and Tartari G. A. and Mosello R.}
}
