Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 404605
Title The impact of Future Land Use and Land Cover Changes on Atmospheric Chemistry-Climate Interactions
Author(s) Ganzeveld, L.N.; Bouwman, L.
Source Journal of Geophysical Research: Atmospheres 115 (2010)D23. - ISSN 2169-897X - 18 p.
Department(s) Earth System Science
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) general-circulation model - organic-compound emissions - isoprene emissions - technical note - dry deposition - sres scenarios - ozone - surface - echam5/messy1 - exchanges
Abstract To demonstrate potential future consequences of land cover and land use changes beyond those for physical climate and the carbon cycle, we present an analysis of large-scale impacts of land cover and land use changes on atmospheric chemistry using the chemistry-climate model EMAC (ECHAM5/MESSy Atmospheric Chemistry) constrained with present-day and 2050 land cover, land use, and anthropogenic emissions scenarios. Future land use and land cover changes are expected to result in an increase in global annual soil NO emissions by ~1.2 TgN yr-1 (9%), whereas isoprene emissions decrease by ~50 TgC yr-1 (-12%). The analysis shows increases in simulated boundary layer ozone mixing ratios up to ~9 ppbv and more than a doubling in hydroxyl radical concentrations over deforested areas in Africa. Small changes in global atmosphere-biosphere fluxes of NOx and ozone point to compensating effects. Decreases in soil NO emissions in deforested regions are counteracted by a larger canopy release of NOx caused by reduced foliage uptake. Despite this decrease in foliage uptake, the ozone deposition flux does not decrease since surface layer mixing ratios increase because of a reduced oxidation of isoprene by ozone. Our study indicates that the simulated impact of land cover and land use changes on atmospheric chemistry depends on a consistent representation of emissions, deposition, and canopy interactions and their dependence on meteorological, hydrological, and biological drivers to account for these compensating effects. It results in negligible changes in the atmospheric oxidizing capacity and, consequently, in the lifetime of methane. Conversely, we expect a pronounced increase in oxidizing capacity as a consequence of anthropogenic emission increases
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