Climate acid deposition role

In the last decade many experiments have been made in stratosphere and troposphere chemistry, as well as in the laboratory on models, on the causes of acid depositions and on the role of fluorocarbons on the ozone layer and the impact of the COi increase in the atmosphere on the climate and on oceans. The studies have given important results for our knowledge and for the advancement of science. 

It is clear from the above summary that CDOM plays a central role in the interaction of UVR and aquatic ecosystem function, and that the effects and implications of CDOM photochemistry are not always straightforward. Moreover, the effects become exacerbated by climate change and anthropogenic modification of aquatic ecosystems (e.g., acid deposition see Chapter 17). 

Long-Term Changes in Boreal Lake and Stream Chemistry Recovery From Acid Deposition and the Role of Climate... 

Forests in particular must endure the combined stresses imposed by climatic extremes/changes, invasion of insects and diseases, and forest management practices in addition to the added stress of acidic pollutants. All of these stresses modify forest health and productivity. Under this complex situation, it has not been possible to establish the exact role that acidification has had on forest decline nor to develop critical deposition levels at which damages are believed to become important 14), However, the geographical coincidence of forest decline and elevated levels of acidic pollutants offer strong evidence that a linkages exists. 

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