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  Importance of surface roughness for the local biogeophysical effects of deforestation

Winckler, J., Reick, C. H., Bright, R., & Pongratz, J. (2019). Importance of surface roughness for the local biogeophysical effects of deforestation. Journal of Geophysical Research - Atmospheres, 124, 8605-8618. doi:10.1029/2018JD030127.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-9DEC-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-89C1-7
Genre: Journal Article

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Supplementary Material: Monthly mean data of the most relevant variables
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 Creators:
Winckler, Johannes1, Author              
Reick, Christian H.2, Author              
Bright, Ryan, Author
Pongratz, Julia1, Author              
Affiliations:
1Emmy Noether Junior Research Group Forest Management in the Earth System, The Land in the Earth System, MPI for Meteorology, Max Planck Society, ou_1832286              
2Global Vegetation Modelling, The Land in the Earth System, MPI for Meteorology, Max Planck Society, ou_913562              

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 Abstract: Deforestation influences surface properties such as surface roughness, resulting in changes in the surface energy balance and surface temperature. Recent studies suggest that the biogeophysical effects are dominated by changing roughness, and it remains unclear whether this can be reconciled with earlier modeling studies that highlighted the importance of a reduction of evapotranspiration in the low latitudes and a reduction of net shortwave radiation at the surface in the high latitudes. To clarify this situation, we analyze the local effects of deforestation on surface energy balance and temperature in the MPI‐ESM climate model by performing three separate experiments: switching from forest to grass all surface properties, only surface albedo, and only surface roughness. We find that the locally induced changes in surface temperature are dominated by changes in surface roughness for the annual mean, the response of the diurnal amplitude, and the seasonal response to deforestation. For these three quantities, the results of the MPI‐ESM lie within the range of observation‐based data sets. Deforestation‐induced decreases in surface roughness contribute substantially to winter cooling in the boreal regions and to decreases in evapotranspiration in the tropics. By comparing the energy balance decompositions from the three experiments, the view that roughness changes dominate the biogeophysical consequences of deforestation can be reconciled with the earlier studies highlighting the relevance of evapotranspiration

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Language(s): eng - English
 Dates: 2018-112019-072019-082019-08
 Publication Status: Published in print
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1029/2018JD030127
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Title: Journal of Geophysical Research - Atmospheres
  Other : JGR-D
  Abbreviation : J. Geophys. Res. - D
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 124 Sequence Number: - Start / End Page: 8605 - 8618 Identifier: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264_1