Publikationen
Es wurden 5 Publikationen gefunden
Häusser, M.; Aryal, S.; Barth, J.; Bendix, J.; Garel, E.; van Geldern, R.; Huneau, F.; Juhlke, T.; Knerr, I.; Santoni, S.; Szymczak, S.; Trachte, K. & Bräuning, A. (2023): Xylem formation patterns from Mediterranean to subalpine climate conditions reveal high growth plasticity of pine species on Corsica. Trees -, 1--13.
Häusser, M.; Szymczak, S.; Knerr, I.; Bendix, J.; Garel, E.; Huneau, F.; Trachte, K.; Santoni, S. & Bräuning, A. (2021): The Dry and the Wet Case: Tree Growth Response in Climatologically Contrasting Years on the Island of Corsica. Forests 12(9), 1-16.
Knerr, I.; Trachte, K.; Egli, S.; Barth, J.; Bräuning, A.; Garel, E.; Häusser, M.; Huneau, F.; Juhlke, T.; Santoni, S.; Szymczak, S.; van Geldern, R. & Bendix, J. (2021): Fog - low stratus (FLS) regimes on Corsica with wind and PBLH as key drivers. Atmospheric Research 261, 105731.
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DOI: 10.1016/j.atmosres.2021.105731
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Abstract:
Abstract:
The French Mediterranean island of Corsica is already today confronted with a clear tendency towards water shortage, leading not only to socio-economical, but also to ecological problems. A potential, but not very widespread source of water is the presence of near-ground clouds, mostly fog. In this study, we investigate fog-low stratus (FLS) frequencies in Corsica, derived from a data set of Meteosat Second Generation SEVIRI, whereby a distinction between fog and low stratus is hardly feasible using remote sensing data. The FLS frequency was studied with respect to its interaction with distinct locally-generated wind and its dependence on the planetary boundary layer height (PBLH) obtained by ERA5 reanalysis (the fifth generation of the European Centre for Medium-Range Weather Forecasts, ECMWF). Results show that radiation FLS is formed in coastal areas at sunrise, with low PBLH. On the other hand, in the interior of the island at sunset, a maximum of advection FLS is formed, fostered by locally-generated and related transport of moisture. On the east side of the island, FLS frequency is lower throughout the year due to frequent lee situations. This situation is reinforced by reduced synoptic moisture transport by westerly winds, so that westerly exposed slopes benefit from moisture input by FLS formation.
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Keywords: |
Corsica |
Mediterranean |
Fog Low Stratus |
Meteosat Second Generation (MSG) |
Planetary Boundary Layer |
Locally-generated wind |
Szymczak, S.; Häusser, M.; Garel, E.; Santoni, S.; Huneau, F.; Knerr, I.; Trachte, K.; Bendix, J. & Bräuning, A. (2020): How Do Mediterranean Pine Trees Respond to Drought and Precipitation Events along an Elevation Gradient?. Forests 11(7), 1.
Knerr, I.; Trachte, K.; Garel, E.; Huneau, F.; Santoni, S. & Bendix, J. (2020): Partitioning of Large-Scale and Local-Scale Precipitation Events by Means of Spatio-Temporal Precipitation Regimes on Corsica. Atmosphere 11(4), 417.
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DOI: 10.3390/atmos11040417
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Abstract:
Abstract:
The island of Corsica in the western Mediterranean is characterized by a pronounced topography in which local breeze systems develop in the diurnal cycle. In interaction with the large-scale synoptic situation, various precipitation events occur, which are classified in this study with regard to their duration and intensity. For this purpose, the island was grouped into five precipitation regimes using a cluster analysis, namely the western coastal area, the central mountainous region, the southern coastal area, the northeast coastal area, and the eastern coastal area. Based on principal component analysis using mean sea level pressure (mslp) obtained from ERA5 reanalysis (the fifth generation of the European Centre for Medium-Range Weather Forecasts, ECMWF), six spatial patterns were identified which explain 98% of the large-scale synoptic situation, while the diurnal breeze systems within the regimes characterize local drivers. It is shown that on radiation days with weak large-scale pressure gradients, pronounced local circulations in mountainous regions are coupled with sea breezes, leading to a higher number of short and intense precipitation events. Meridional circulation patterns lead to more intensive precipitation events on the eastern part of the island (30% intensive events with meridional patterns on the east side compared to 11% on the west side). On the west side of Corsica, however, coastal precipitation events are seldom and less intense than further inland, which can be attributed to the influence of the topography in frontal passages.
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Keywords: |
precipitation |
clustering |
corsica |
era-5 |
mediterranean |
principal component analysis |