Compound extreme events in Africa - UNOOSA
Compound extreme events in Africa
Mastawesha Misganaw Engdaw
University of Graz, Austria
mastaweshamisganaw@
mastawesha.engdaw@uni-graz.at
12 May 2022
Accra, Ghana
Outline
? Introduction
? Climate change and changes in compound
extreme events
? Drought related compound extreme events
? Detection and Attribution
? Risk and vulnerability assessment
2
Climate (hydrological) extremes
IPCC WG II
Climate change has intensified the global
hydrological cycle causing several societal impacts,
which are felt disproportionately by vulnerable
people (high confidence)
Compound hazards increasing with global warming
include increased frequency of concurrent
heatwaves and droughts (high confidence)
3
Compound extreme events
? CEs as the combination of multiple drivers and/or
hazards that contribute to societal or environmental
risk.
Drivers: weather and/or climate processes, variables and
phenomena that may span multiple spatial and temporal
scales.
Hazards: Changes in variability and extremes, Long-term
changes/trends in average conditions and
abrupt/singular changes
? Primary means of interaction: temporal compounding,
spatial compounding, preconditioning, and concurrence
of multiple variables
Raymond et al. (2020), Nature Climate Change
4
Compound extreme events:
hazards and drivers
Raymond et al. (2020), Nature Climate Change
5
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