A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...
A Look at Amazon Basin Seasonal Dynamics with the Biophysical ... A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...
Impact of land cover and land use changes on surface trace gas exchanges.Laurens GanzeveldMax-Planck Institute for ChemistryJoh.-Joachim-Becher-Weg 27, P.O. Box 3060, 55020 Mainz, GermanyE-mail: ganzeveld@mpch-mainz.mpg.deSurface trace gases exchanges are controlled to a large extent by land cover and landuse. Dry deposition as well as biogenic emissions depend on turbulent exchange and thebiogeo-physical and -chemical properties of the surface. Moreover, interactions between drydeposition and biogenic emissions within the vegetation canopy depend on land coverproperties through modification of the turbulent exchange and (photo)-chemicaltransformations within the canopy. Hence it is expected that changes in land cover and landuse, e.g., deforestation, will alter surface trace gas exchanges and consequently atmosphericchemistry.The complexity of surface trace gas exchange processes requires the use of explicit,mechanistic models to assess potential impacts of land cover and land use changes. Thechemistry-GCM ECHAM contains such an explicit representation of dry deposition, biogenicemissions, canopy interactions and meteorology. To indicate the complexity of the impact ofland cover and land use changes on surface trace gas exchanges, through changes in thePlanetary Boundary Layer- and micrometeorology, we will present some results of adeforestation scenario for the Amazon region, using a Single Column Model version ofECHAM.
- Page 738: Relation between photosintesys and
- Page 742: Laura Tillmann Viana University of
- Page 746: HUMAN DIMENSIONS AND METRICS OF LAN
- Page 750: ABSTRACTDEFORESTATION CONTROL IN MA
- Page 754: 1PREDICTORS OF DEFORESTATION IN THE
- Page 758: Simulating land cover change along
- Page 762: ASSESSING THE EVOLUTION OF LAND USE
- Page 766: Introducing New Agricultural Techno
- Page 770: Forest susceptibility to fire durin
- Page 774: Committed carbon emissions from def
- Page 778: Changes in land use in the city of
- Page 782: Título: Land Occupation and Use in
- Page 786: Effect of labile carbon additions o
- Page 792: Soil trace gas emissions influenced
- Page 796: Emissions of CO 2 , CH 4 , N 2 O, a
- Page 800: NO x and CO emissions from soil and
- Page 804: Methane dynamics in undisturbed for
- Page 808: ut soil temperature was not. Absenc
- Page 812: Influence of Amazônia Land-use Cha
- Page 816: ISOPRENOID FLUXES AND PHOTOSYNTHETI
- Page 820: Concentration profiles of volatile
- Page 824: Abstract submitted for presentation
- Page 828: The meteorological conditions durin
- Page 832: THE INFLUENCE OF FLOODING ON THE EX
- Page 836: Vegetation Dynamics in a Changing E
Impact of land cover and land use changes on surface trace gas exchanges.Laurens GanzeveldMax-Planck Institute for ChemistryJoh.-Joachim-Becher-Weg 27, P.O. Box 3060, 55020 Mainz, GermanyE-mail: ganzeveld@mpch-mainz.mpg.deSurface trace gases exchanges are controlled to a large extent by land cover and landuse. Dry deposition as well as biogenic emissions depend on turbulent exchange and <strong>the</strong>biogeo-physical and -chemical properties of <strong>the</strong> surface. Moreover, interactions between drydeposition and biogenic emissions <strong>with</strong>in <strong>the</strong> veget<strong>at</strong>ion canopy depend on land coverproperties through modific<strong>at</strong>ion of <strong>the</strong> turbulent exchange and (photo)-chemicaltransform<strong>at</strong>ions <strong>with</strong>in <strong>the</strong> canopy. Hence it is expected th<strong>at</strong> changes in land cover and landuse, e.g., deforest<strong>at</strong>ion, will alter surface trace gas exchanges and consequently <strong>at</strong>mosphericchemistry.The complexity of surface trace gas exchange processes requires <strong>the</strong> use of explicit,mechanistic models to assess potential impacts of land cover and land use changes. Thechemistry-GCM ECHAM contains such an explicit represent<strong>at</strong>ion of dry deposition, biogenicemissions, canopy interactions and meteorology. To indic<strong>at</strong>e <strong>the</strong> complexity of <strong>the</strong> impact ofland cover and land use changes on surface trace gas exchanges, through changes in <strong>the</strong>Planetary Boundary Layer- and micrometeorology, we will present some results of adeforest<strong>at</strong>ion scenario for <strong>the</strong> <strong>Amazon</strong> region, using a Single Column Model version ofECHAM.
Change language