A reversal in NO3 trends for lakes and rivers in Northern Italy: towards a recovery from N saturation? (Abstract/Comunicazione in atti di convegno)

Type
Label
  • A reversal in NO3 trends for lakes and rivers in Northern Italy: towards a recovery from N saturation? (Abstract/Comunicazione in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Rogora, Michela; Arisci, Silvia; Marchetto, Aldo (2011)
    A reversal in NO3 trends for lakes and rivers in Northern Italy: towards a recovery from N saturation?
    in Nitrogen and global change - key findings, future challenges., Edimburgo, Scozia, 11-14 aprile 2011
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Rogora, Michela; Arisci, Silvia; Marchetto, Aldo (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • ID PUMA:cnr.ise/2011-A6-008 (literal)
Note
  • PuMa (literal)
  • Abstract (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ISE, Pallanza Verbania (literal)
Titolo
  • A reversal in NO3 trends for lakes and rivers in Northern Italy: towards a recovery from N saturation? (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Centre for Ecology & Hydrology (CEH) (literal)
Abstract
  • Long-term studies on the chemistry of atmospheric deposition and surface waters have been performed in North-Western Italy since the 1970s. Deposition of inorganic N in this area is around 20-25 kg N ha-1 y-1, and has remained fairly constant in the last 30 years. This huge flux of N caused N-saturation of terrestrial catchments and increasing levels of NO3 in rivers and lakes. Recently, monitoring data for both rivers and lakes showed a reversal in NO3 Methods/Approach trends: concentrations started to decrease, with a change-point around 2003-2004 at several sites. This change was widespread, affecting both high altitude lakes in the Alps and subalpine lakes and rivers. Atmospheric input of N also showed a recent change, with a slight tendency to decrease, mainly due to the limited precipitation amount occurred between 2003 and 2009. Surface water may be responding to these changing N input, but possible climate change effects, as a higher N uptake in soil and water under a warmer climate, should also be taken into account. (literal)
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