Journal
NATURE COMMUNICATIONS
Volume 2, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/ncomms1411
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Categories
Funding
- OMI
- Aura Validation Data Center
- Fundacion BBVA-ECOSENSOR
- Junta de Andalucia AEROGLOBAL
- Ministerio de Medio Ambiente MICROBIOGEOGRAPHY [080/2007]
- Natural Sciences and Engineering Research Council of Canada
- ArcticNet
- Polar Continental Shelf Project
- Parks Canada
- International Polar Year
- Centre detudes nordiques
- Spanish Ministry of Education and Science [CGL2005-06549-C02-02/ANT, CGL2005-06549-C02-01/ANT]
- European FEDER
- Ministerio de Medio Ambiente [011/2008, CSD2007-00067]
- Austrian Science Fund (FWF) [P19245-BO3]
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Remote lakes are usually unaffected by direct human influence, yet they receive inputs of atmospheric pollutants, dust, and other aerosols, both inorganic and organic. In remote, alpine lakes, these atmospheric inputs may influence the pool of dissolved organic matter, a critical constituent for the biogeochemical functioning of aquatic ecosystems. Here, to assess this influence, we evaluate factors related to aerosol deposition, climate, catchment properties, and microbial constituents in a global dataset of 86 alpine and polar lakes. We show significant latitudinal trends in dissolved organic matter quantity and quality, and uncover new evidence that this geographic pattern is influenced by dust deposition, flux of incident ultraviolet radiation, and bacterial processing. Our results suggest that changes in land use and climate that result in increasing dust flux, ultraviolet radiation, and air temperature may act to shift the optical quality of dissolved organic matter in clear, alpine lakes.
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