Investigating Flash Droughts in Sicily Using Evapotranspiration and Soil Moisture Analysis
Run analysis of potential
Run analysis of potential
evapotranspiration and soil moisture for
evapotranspiration and soil moisture for
investigating flash droughts in Sicily
investigating flash droughts in Sicily
Tagele Mossie Aschale
1
,
David J. Peres
1
, Nunziarita Palazzolo
1
, Guido Scuito
2
, Antonino Cancelliere
1
(1)
University of Catania, Department of Civil Engineering and Architecture, Catania, Italy (tagele.aschale@phd.unict.it)
(2)
Ambiens Srl, Via Roma, 44, 94019 Valguarnera Caropepe, Italy
Aim of the study
•
The identification of a rapid and exceptional increase of evapotranspiration and decrease
of soil moisture is considered as key for identifying
flash drought
onset.
•
A
preliminary investigation
on the possible recent occurrence of flash droughts in
Sicily
has been carried out
Data
•
Soil moisture from ERA5 Land (daily average)
•
ET0 computed by Penman-Monteith in 46 meteorological stations in Sicily island for the
last 22 years
Analysis
•
Anomalies of soil moisture and ET0
respect to daily long-term means have been
considered (
runs
) in order to spot possible past flash droughts
•
The
trend of ET0
has been analysed. In
5 locations a significant annual
trend has been
observed.
•
The
Evaporative Demand Drought Index (EDDI)
for these 5 stations has been computed
at various aggregations
Results show
possible flash drought occurrence
in eastern Sicily within
year 2002
SOIL MOISTURE AND ET0
ANOMALIES
Soil moisture anomaly – Catania
0.72 m depth
1.89 m depth
drougth
drougth
ET0 anomaly – Catania
Very high ET0 anomaly
ET0 TREND ANALYSIS
Results
•
The MK
of the PET trend for each
meteorological station at different
temporal scales.
•
Yellow shading represents the
Z
value decreasing PET trend,
whereas the reddish shading is the
Z
value increasing PET trend.
•
Sen’s Slope (the PET Trend
Magnitude) in mm for
monthly, seasonally and
annually scales.
•
Five metrological stations
showed a positive trend in
annual scale.
•
The highest decreasing trend
of PET was detected at
Maletto in July
&
Summer
trend of the PET.
•
•
The five meteorological
stations which showed
positive annul PET trend.
Different temporal scale trend
Spatial PET trend over Sicily
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
W
inter
Spring
Summer
Autumn
Annual
EDDI
EDDI – Catania
Very high ET0
Very fast increase
•
Th ETo spatiotemporal trend paper is:
An Assessment of Trends of Potential
Evapotranspiration at Multiple Timescales and
Locations in Sicily from 2002 to 2022
DOI:
https://doi.org/10.3390/w15071273
This study focuses on identifying flash droughts in Sicily by analyzing potential evapotranspiration and soil moisture anomalies. The research examines trends in evapotranspiration and soil moisture levels over the past 22 years, pinpointing a possible flash drought occurrence in eastern Sicily in 2002.
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Presentation Transcript
Run analysis of potential evapotranspiration and soil moisture for investigating flash droughts in Sicily Tagele Mossie Aschale1, David J. Peres1 , Nunziarita Palazzolo1, Guido Scuito2, Antonino Cancelliere1 (1) University of Catania, Department of Civil Engineering and Architecture, Catania, Italy (tagele.aschale@phd.unict.it) (2) Ambiens Srl, Via Roma, 44, 94019 Valguarnera Caropepe, Italy Programme group: NH Session: NH9.16 Tue, 25 Apr, 09:07 09:09 Room: PICO spot 3b | PICO3b.13
Aim of the study The identification of a rapid and exceptional increase of evapotranspiration and decrease of soil moisture is considered as key for identifying flash drought onset. A preliminary investigation on the possible recent occurrence of flash droughts in Sicily has been carried out Data Soil moisture from ERA5 Land (daily average) ET0 computed by Penman-Monteith in 46 meteorological stations in Sicily island for the last 22 years Analysis Anomalies of soil moisture and ET0 respect to daily long-term means have been considered (runs) in order to spot possible past flash droughts The trend of ET0 has been analysed. In 5 locations a significant annual trend has been observed. The Evaporative Demand Drought Index (EDDI) for these 5 stations has been computed at various aggregations Results show possible flash drought occurrence in eastern Sicily within year 2002
SOIL MOISTURE AND ET0 ANOMALIES
Soil moisture anomaly Catania 0.72 m depth drougth 1.89 m depth drougth
ET0 anomaly Catania Very high ET0 anomaly
Results The MK of the PET trend for each meteorological station at different temporal scales. Yellow shading represents the Z value decreasing whereas the reddish shading is the Z value increasing PET trend. PET trend,
Sen s Slope (the PET Trend Magnitude) in mm for monthly, seasonally annually scales. Five metrological stations showed a positive trend in annual scale. The highest decreasing trend of PET was detected at Maletto in July & Summer trend of the PET. and
The stations positive annul PET trend. five meteorological which showed
Spatial PET trend over Sicily JAN FEB MAR JUN APR MAY
JUL AUG SEP DEC OCT NOV
Winter Spring Summer Autumn Annual
EDDI Catania Very fast increase Very high ET0
Th ETo spatiotemporal trend paper is: An Assessment of Trends of Potential Evapotranspiration at Multiple Timescales and Locations in Sicily from 2002 to 2022 DOI: https://doi.org/10.3390/w15071273
