In:
Photochemical & Photobiological Sciences, Springer Science and Business Media LLC, Vol. 14, No. 1 ( 2014-01), p. 127-148
Abstract:
Climate change modulates the effects of solar UV radiation on biogeochemical cycles in terrestrial and aquatic ecosystems, particularly for carbon cycling, resulting in UV-mediated positive or negative feedbacks on climate. Possible positive feedbacks discussed in this assessment include: (i) enhanced UV-induced mineralisation of above ground litter due to aridification; (ii) enhanced UV-induced mineralisation of photoreactive dissolved organic matter (DOM) in aquatic ecosystems due to changes in continental runoff and ice melting; (iii) reduced efficiency of the biological pump due to UV-induced bleaching of coloured dissolved organic matter (CDOM) in stratified aquatic ecosystems, where CDOM protects phytoplankton from the damaging solar UV-B radiation. Mineralisation of organic matter results in the production and release of CO 2 , whereas the biological pump is the main biological process for CO 2 removal by aquatic ecosystems. This paper also assesses the interactive effects of solar UV radiation and climate change on the biogeochemical cycling of aerosols and trace gases other than CO 2 , as well as of chemical and biological contaminants. Interacting effects of solar UV radiation and climate change on biogeochemical cycles are particularly pronounced at terrestrial-aquatic interfaces.
Type of Medium:
Online Resource
ISSN:
1474-905X
,
1474-9092
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2014
detail.hit.zdb_id:
2072584-X
SSG:
12
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