Assessment of the Urban Impact on Surface and Screen-Level Temperature in the ALADIN-Climate Driven SURFEX Land Surface Model for Budapest

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Zsebeházi , G & Mahó , S I 2021 , ' Assessment of the Urban Impact on Surface and Screen-Level Temperature in the ALADIN-Climate Driven SURFEX Land Surface Model for Budapest ' , Atmosphere , vol. 12 , no. 6 , 709 . https://doi.org/10.3390/atmos12060709

Title: Assessment of the Urban Impact on Surface and Screen-Level Temperature in the ALADIN-Climate Driven SURFEX Land Surface Model for Budapest
Author: Zsebeházi, Gabriella; Mahó, Sándor István
Other contributor: University of Helsinki, Department of Physics
Date: 2021-06
Language: eng
Number of pages: 20
Belongs to series: Atmosphere
ISSN: 2073-4433
DOI: https://doi.org/10.3390/atmos12060709
URI: http://hdl.handle.net/10138/332744
Abstract: Land surface models with detailed urban parameterization schemes provide adequate tools to estimate the impact of climate change in cities, because they rely on the results of the regional climate model, while operating on km scale at low cost. In this paper, the SURFEX land surface model driven by the evaluation and control runs of ALADIN-Climate regional climate model is validated over Budapest from the aspect of urban impact on temperature. First, surface temperature of SURFEX with forcings from ERA-Interim driven ALADIN-Climate was compared against the MODIS land surface temperature for a 3-year period. Second, the impact of the ARPEGE global climate model driven ALADIN-Climate was assessed on the 2 m temperature of SURFEX and was validated against measurements of a suburban station for 30 years. The spatial extent of surface urban heat island (SUHI) is exaggerated in SURFEX from spring to autumn, because the urbanized gridcells are generally warmer than their rural vicinity, while the observed SUHI extent is more variable. The model reasonably simulates the seasonal means and diurnal cycle of the 2 m temperature in the suburban gridpoint, except summer when strong positive bias occurs. However, comparing the two experiments from the aspect of nocturnal UHI, only minor differences arose. The thorough validation underpins the applicability of SURFEX driven by ALADIN-Climate for future urban climate projections.
Subject: 114 Physical sciences
urban climate modelling
land surface modelling
urban heat island
surface urban heat island
model validation
HEAT-ISLAND
SCHEME
PARAMETERIZATION
INCLUSION
VARIABLES
BRUSSELS
LAYER
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