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Validation of the ALARO-0 model within the EURO-CORDEX framework

Olivier Giot, Piet Termonia UGent, Daan Degrauwe UGent, Rozemien De Troch, Steven Caluwaerts UGent, Geert Smet, Julie Berckmans, Alex Deckmyn UGent, Lesley De Cruz, Pieter De Meutter UGent, et al. (2016) GEOSCIENTIFIC MODEL DEVELOPMENT. 9(3). p.1143-1152
abstract
Using the regional climate model ALARO-0, the Royal Meteorological Institute of Belgium and Ghent University have performed two simulations of the past observed climate within the framework of the Coordinated Regional Climate Downscaling Experiment (CORDEX). The ERA-Interim reanalysis was used to drive the model for the period 1979–2010 on the EURO-CORDEX domain with two horizontal resolutions, 0.11 and 0.44°. ALARO-0 is characterised by the new microphysics scheme 3MT, which allows for a better representation of convective precipitation. In Kotlarski et al. (2014) several metrics assessing the performance in representing seasonal mean near-surface air temperature and precipitation are defined and the corresponding scores are calculated for an ensemble of models for different regions and seasons for the period 1989–2008. Of special interest within this ensemble is the ARPEGE model by the Centre National de Recherches Météorologiques (CNRM), which shares a large amount of core code with ALARO-0. Results show that ALARO-0 is capable of representing the European climate in an acceptable way as most of the ALARO-0 scores lie within the existing ensemble. However, for near-surface air temperature, some large biases, which are often also found in the ARPEGE results, persist. For precipitation, on the other hand, the ALARO-0 model produces some of the best scores within the ensemble and no clear resemblance to ARPEGE is found, which is attributed to the inclusion of 3MT. Additionally, a jackknife procedure is applied to the ALARO-0 results in order to test whether the scores are robust, meaning independent of the period used to calculate them. Periods of 20 years are sampled from the 32-year simulation and used to construct the 95 % confidence interval for each score. For most scores, these intervals are very small compared to the total ensemble spread, implying that model differences in the scores are significant.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
CLIMATE MODELS, SCALES, CLOUD, SIMULATIONS, REANALYSIS, CONVECTION, RESOLUTION
journal title
GEOSCIENTIFIC MODEL DEVELOPMENT
Geosci. Model Dev.
volume
9
issue
3
pages
1143 - 1152
Web of Science type
Article
Web of Science id
000376934900013
JCR category
GEOSCIENCES, MULTIDISCIPLINARY
JCR impact factor
3.458 (2016)
JCR rank
31/188 (2016)
JCR quartile
1 (2016)
ISSN
1991-959X
DOI
10.5194/gmd-9-1143-2016
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
7196240
handle
http://hdl.handle.net/1854/LU-7196240
date created
2016-04-26 14:16:43
date last changed
2017-08-02 11:29:50
@article{7196240,
  abstract     = {Using the regional climate model ALARO-0, the Royal Meteorological Institute of Belgium and Ghent University have performed two simulations of the past observed climate within the framework of the Coordinated Regional Climate Downscaling Experiment (CORDEX). The ERA-Interim reanalysis was used to drive the model for the period 1979--2010 on the EURO-CORDEX domain with two horizontal resolutions, 0.11 and 0.44{\textdegree}. ALARO-0 is characterised by the new microphysics scheme 3MT, which allows for a better representation of convective precipitation. In Kotlarski et al. (2014) several metrics assessing the performance in representing seasonal mean near-surface air temperature and precipitation are defined and the corresponding scores are calculated for an ensemble of models for different regions and seasons for the period 1989--2008. Of special interest within this ensemble is the ARPEGE model by the Centre National de Recherches M{\'e}t{\'e}orologiques (CNRM), which shares a large amount of core code with ALARO-0.
Results show that ALARO-0 is capable of representing the European climate in an acceptable way as most of the ALARO-0 scores lie within the existing ensemble. However, for near-surface air temperature, some large biases, which are often also found in the ARPEGE results, persist. For precipitation, on the other hand, the ALARO-0 model produces some of the best scores within the ensemble and no clear resemblance to ARPEGE is found, which is attributed to the inclusion of 3MT.
Additionally, a jackknife procedure is applied to the ALARO-0 results in order to test whether the scores are robust, meaning independent of the period used to calculate them. Periods of 20 years are sampled from the 32-year simulation and used to construct the 95 \% confidence interval for each score. For most scores, these intervals are very small compared to the total ensemble spread, implying that model differences in the scores are significant.},
  author       = {Giot, Olivier and Termonia, Piet and Degrauwe, Daan and De Troch, Rozemien and Caluwaerts, Steven and Smet, Geert and Berckmans, Julie and Deckmyn, Alex and De Cruz, Lesley and De Meutter, Pieter and Duerinckx, Annelies and Gerard, Luc and Hamdi, Rafiq and Van den Bergh, Joris and Van Ginderachter, Michiel and Van Schaeybroeck, Bert},
  issn         = {1991-959X},
  journal      = {GEOSCIENTIFIC MODEL DEVELOPMENT},
  keyword      = {CLIMATE MODELS,SCALES,CLOUD,SIMULATIONS,REANALYSIS,CONVECTION,RESOLUTION},
  language     = {eng},
  number       = {3},
  pages        = {1143--1152},
  title        = {Validation of the ALARO-0 model within the EURO-CORDEX framework},
  url          = {http://dx.doi.org/10.5194/gmd-9-1143-2016},
  volume       = {9},
  year         = {2016},
}

Chicago
Giot, Olivier, Piet Termonia, Daan Degrauwe, Rozemien De Troch, Steven Caluwaerts, Geert Smet, Julie Berckmans, et al. 2016. “Validation of the ALARO-0 Model Within the EURO-CORDEX Framework.” Geoscientific Model Development 9 (3): 1143–1152.
APA
Giot, O., Termonia, P., Degrauwe, D., De Troch, R., Caluwaerts, S., Smet, G., Berckmans, J., et al. (2016). Validation of the ALARO-0 model within the EURO-CORDEX framework. GEOSCIENTIFIC MODEL DEVELOPMENT, 9(3), 1143–1152.
Vancouver
1.
Giot O, Termonia P, Degrauwe D, De Troch R, Caluwaerts S, Smet G, et al. Validation of the ALARO-0 model within the EURO-CORDEX framework. GEOSCIENTIFIC MODEL DEVELOPMENT. 2016;9(3):1143–52.
MLA
Giot, Olivier, Piet Termonia, Daan Degrauwe, et al. “Validation of the ALARO-0 Model Within the EURO-CORDEX Framework.” GEOSCIENTIFIC MODEL DEVELOPMENT 9.3 (2016): 1143–1152. Print.