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Sensitivity of european temperature to albedo parameterization in the regional climate model COSMO-CLM linked to extreme land use changes

Tölle, M. H.; Breil, M.; Radtke, K.; Panitz, H.-J.

Abstract:
Previous studies based on observations and models are uncertain about the biophysical impact of af- and deforestation in the northern hemisphere mid-latitude summers, and show either a cooling or warming. The spatial distribution, magnitude and direction are still uncertain. In this study, the effect of three different albedo parameterizations in the regional climate model COSMO-CLM (v5.09) is examined performing idealized experiments at 0.44° horizontal resolution across the EURO-CORDEX domain during 1986–2015. De- and af-forestation simulations are compared to a simulation with no land cover change. Emphasis is put on the impact of changes in radiation and turbulent fluxes. A clear latitudinal pattern is found, which results partly due to the strong land cover conversion from forest- to grassland in the high latitudes and open land to forest conversion in mid-latitudes. Afforestation warms the climate in winter, and strongest in mid-latitudes. Results are indifferent in summer owing to opposing albedo and evapotranspiration effects of comparable size but different sign. Thus, the net effect is small for summer. Depending on the albedo parameterization in the model, the temperature effect can turn from cooling to warming in mid-latitude summers. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000088425
Veröffentlicht am 17.12.2018
Originalveröffentlichung
DOI: 10.3389/fenvs.2018.00123
Scopus
Zitationen: 1
Coverbild
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2296-665X
urn:nbn:de:swb:90-884251
KITopen-ID: 1000088425
HGF-Programm 12.01.02 (POF III, LK 01)
Erschienen in Frontiers in Environmental Science
Band 6
Seiten Art. Nr.: 123
Schlagworte land cover change, biophysical effect, albedo parameterization, evapotranspiration, regional climate model, climate, de-/afforestation, surface energy balance
Nachgewiesen in Scopus
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