Deposition of sulphur and nitrogen in Europe 1900-2050. Model calculations and comparison to historical observations
Artikel i vetenskaplig tidskrift, 2017

As a contribution to an EU project which dealt with the effects of climate change, air pollution impacts and ecosystems, two different atmospheric chemical transport models were used to simulate the depositions of acidifying and eutrophying pollutants over Europe for the period 1900-2050. Given the unavoidable uncertainties in the historical inputs to these simulations (emissions, meteorology), we generated a new and unique data-set for the purposes of model evaluation; comprising data from the European Air Chemistry Network (EACN) in operation from 1955 to early 1980s and more recent data from the EMEP monitoring network. The two models showed similar and reasonable skills in reproducing both the EACN and EMEP observational data although the MATCH model consistently simulates higher concentrations and depositions than the EMEP model. To further assess the models' ability to reproduce the long-term trend in sulphur and nitrogen deposition we compared modelled concentrations of major ions in precipitation with data extracted from a glacier in the European Alps. While, the shape and timing of the nss-sulphate data agrees reasonably, the ice core data indicate persistently high nitrogen concentrations of oxidised and reduced nitrogen after the 1980s which does not correspond to the model simulations or data from Western Europe in the EMEP monitoring network. This study concludes that nss-sulphate deposition to Europe was already clearly elevated in the year 1900, but has now (mid-2010s) decreased to about 70% of what it was at the beginning of the last century. The deposition of oxidised nitrogen to Europe peaked during the 1980s but has since decreased to half of its maximum value; still it is 3-4 times higher than in the year 1900. The annual deposition of reduced nitrogen to Europe is currently more than two times as high as the conditions in the year 1900.

Acid-Rain

Future Changes

EMEP

EACN

Emissions

Baltic Sea

ECLAIRE

MATCH

Climate-Change

Reactive Nitrogen

European Air Chemistry Network

Air-Pollution

Surface Ozone

Atmospheric Chemistry

EMEP MSC-W

Författare

M. Engardt

M. Schwikowski

L. Granat

Tellus, Series B: Chemical and Physical Meteorology

0280-6509 (ISSN) 1600-0889 (eISSN)

Vol. 69 Article: 1328945-

Drivkrafter

Hållbar utveckling

Ämneskategorier

Meteorologi och atmosfärforskning

Fundament

Grundläggande vetenskaper

DOI

10.1080/16000889.2017.1328945

Mer information

Skapat

2017-10-08