Δημοσιεύσεις

Project Acronym: HRCOG
Title: High Resolution Climatology over Greece
Affiliation: ncsr demokritos
Pi: Nadia Politi
Research Field: climatology

A Sensitivity Study of High‐Resolution Climate Simulations for Greece
by Nadia Politi, Athanasios Sfetsos, Diamando Vlachogiannis, Panagiotis T. Nastos, Stylianos Karozis
Abstract:
In the present study, the ability of the Advanced Weather Research and Forecasting numerical model (WRF‐ARW) to perform climate regionalization studies in the topographically complex region of Greece, was examined in order to explore the possibility of a more reliable selection of physical schemes for the simulation of historical and future high resolution (5 km) climate model experiments to investigate the impact of climate change. This work is directly linked to a previous study investigating the performance of seven different model setups for one year, from which the need was derived for further examination of four different simulations to investigate the model sensitivity on the representation of surface variables statistics during a 5‐year period. The results have been compared with observational data for maximum and minimum air temperature and daily precipitation through statistical analysis. Clear similarities were found in precipitation patterns among simulations and observations, yielding smoothly its inter‐annual variability, especially during the wettest months and summer periods, with the lowest positive percentage BIAS calculated at about 19% for the selected combination of physics parameterizations (PP3). Regarding the maximum and minimum temperature, statistical analysis showed a high correlation above 0.9, and negative bias around 1−1.5 °C, and positive bias near 2 °C, respectively.
Reference:
A Sensitivity Study of High‐Resolution Climate Simulations for Greece (Nadia Politi, Athanasios Sfetsos, Diamando Vlachogiannis, Panagiotis T. Nastos, Stylianos Karozis), In Climate, volume 8, 2020.
Bibtex Entry:
@article{doi:10.3390-cli8030044,
 author = {Nadia Politi, Athanasios Sfetsos, Diamando Vlachogiannis, Panagiotis T. Nastos, Stylianos Karozis},
 doi = {10.3390/cli8030044},
 url = {https://doi.org/10.3390/cli8030044},
 year = {2020},
 bibyear = {2020},
 journal = {Climate},
 volume = {8},
 pages = {44},
 title = {A Sensitivity Study of High‐Resolution Climate Simulations for Greece},
 abstract = {In the present study, the ability of the Advanced Weather Research and Forecasting
numerical model (WRF‐ARW) to perform climate regionalization studies in the topographically
complex region of Greece, was examined in order to explore the possibility of a more reliable
selection of physical schemes for the simulation of historical and future high resolution (5 km)
climate model experiments to investigate the impact of climate change. This work is directly linked
to a previous study investigating the performance of seven different model setups for one year,
from which the need was derived for further examination of four different simulations to
investigate the model sensitivity on the representation of surface variables statistics during a 5‐year
period. The results have been compared with observational data for maximum and minimum air
temperature and daily precipitation through statistical analysis. Clear similarities were found in
precipitation patterns among simulations and observations, yielding smoothly its inter‐annual
variability, especially during the wettest months and summer periods, with the lowest positive
percentage BIAS calculated at about 19% for the selected combination of physics parameterizations
(PP3). Regarding the maximum and minimum temperature, statistical analysis showed a high
correlation above 0.9, and negative bias around 1−1.5 °C, and positive bias near 2 °C, respectively.},
}