Stephan Pfahl
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View article: Editor comment on egusphere-2025-3992
Editor comment on egusphere-2025-3992 Open
View article: Supplementary material to "Storm-Resolving Models Advance Atmospheric Blocking Simulations and Climate Change Insights"
Supplementary material to "Storm-Resolving Models Advance Atmospheric Blocking Simulations and Climate Change Insights" Open
View article: Storm-Resolving Models Advance Atmospheric Blocking Simulations and Climate Change Insights
Storm-Resolving Models Advance Atmospheric Blocking Simulations and Climate Change Insights Open
Atmospheric blocking is a key driver of midlatitude weather extremes, including heatwaves and cold spells. Yet general circulation models (GCMs) still struggle to capture the frequency, persistence, and spatial characteristics of blocking.…
View article: Editor comment on egusphere-2025-3308
Editor comment on egusphere-2025-3308 Open
View article: Physical processes leading to extreme day-to-day temperature change – Part 1: Present-day climate
Physical processes leading to extreme day-to-day temperature change – Part 1: Present-day climate Open
Extreme temperature changes from one day to another that are associated with either warming or cooling can have a significant impact on health, the environment, and society. Previous studies have shown that such day-to-day temperature (DTD…
View article: Future extreme precipitation may shift to colder seasons in northern mid- and high latitudes
Future extreme precipitation may shift to colder seasons in northern mid- and high latitudes Open
Despite high confidence in the intensification of the hydrological cycle due to global warming, the future spatiotemporal patterns of extreme precipitation remain uncertain. Here we explore how climate change influences the seasonal timing…
View article: Thermodynamic and Dynamic Contribution in Precipitation Extremes over Europe and theMediterranean Basin.
Thermodynamic and Dynamic Contribution in Precipitation Extremes over Europe and theMediterranean Basin. Open
Extreme weather events such as heavy precipitation and droughts are key indicators of climatechange, yet their variability and underlying drivers remain challenging to assess. This studyinvestigates trends in extreme precipitation over Eur…
View article: Environments and lifting mechanisms of cold-frontal convective cells during the warm season in Germany
Environments and lifting mechanisms of cold-frontal convective cells during the warm season in Germany Open
Convection often initiates in proximity to cold fronts during the warm season, but how various processes favour convective initiation at different regions relative to the front is still not well-understood. By combining automatic front det…
View article: Assessing Lagrangian coherence in atmospheric blocking
Assessing Lagrangian coherence in atmospheric blocking Open
Atmospheric blocking exerts a major influence on mid-latitude atmospheric circulation and is known to be associated with extreme weather events. Previous work has highlighted the importance of the origin of air parcels that define the bloc…
View article: Physical Processes Leading to Extreme day-to-day Temperatures Changes, Part I: Present-day Climate
Physical Processes Leading to Extreme day-to-day Temperatures Changes, Part I: Present-day Climate Open
Extreme temperature changes from one day to another, either associated with warming or cooling, can have a significant impact on health, environment, and society. Previous studies have quantified that such day-to-day temperature (DTDT) var…
View article: Enhanced Blocking Frequencies in Very‐High Resolution Idealized Climate Model Simulations
Enhanced Blocking Frequencies in Very‐High Resolution Idealized Climate Model Simulations Open
Atmospheric blocking is a key dynamical phenomenon in the mid‐ and high latitudes, able to drive day‐to‐day weather changes and meteorological extremes such as heatwaves, droughts and cold waves. Current global circulation models struggle …
View article: Quantifying free tropospheric moisture sources over the western tropical <scp>Atlantic</scp> with numerical water tracers and isotopes
Quantifying free tropospheric moisture sources over the western tropical <span>Atlantic</span> with numerical water tracers and isotopes Open
Tropical free‐tropospheric humidity plays a crucial role for the Earth's radiative balance and climate sensitivity. In addition to atmospheric humidity, stable water isotopes can provide important information about the hydrological cycle. …
View article: Environments and lifting mechanisms of cold-frontal convective cells during the warm-season in Germany
Environments and lifting mechanisms of cold-frontal convective cells during the warm-season in Germany Open
Convection often initiates in proximity to cold fronts during the warm-season, but how various processes favour convective initiation at different regions relative to the front is still not well-understood. By combining automatic front det…
View article: Global estimates of 100-year return values of daily precipitation from ensemble weather prediction data
Global estimates of 100-year return values of daily precipitation from ensemble weather prediction data Open
High-impact river floods are often caused by very extreme precipitation events with return periods of several decades or centuries, and the design of flood protection measures thus relies on reliable estimates of the corresponding return v…
View article: Assessing Lagrangian Coherence in Atmospheric Blocking
Assessing Lagrangian Coherence in Atmospheric Blocking Open
Atmospheric blocking exerts a major influence on mid-latitude atmospheric circulation and is known to be associated with extreme weather events. Previous work has highlighted the importance of the origin of air parcels that define the bloc…
View article: Unraveling the moisture transport in the North Atlantic trade-wind region using passive tracers and stable water isotopes
Unraveling the moisture transport in the North Atlantic trade-wind region using passive tracers and stable water isotopes Open
The atmospheric hydrologic cycle and the formation of shallow cumulus clouds in the marine trade-wind region are important for the Earth’s radiative budget and climate sensitivity. Furthermore, the understanding of air mixing and tra…
View article: Climatology, characteristics and forcing mechanisms of warm-season cold-frontal convection in Europe
Climatology, characteristics and forcing mechanisms of warm-season cold-frontal convection in Europe Open
Convection frequently initiates in proximity to cold fronts during the European warm-season and can also be associated with hazards such as flooding, rain, and hail. Despite this, the frequency and underlying processes that drive such even…
View article: Future shifts in timing of regional extreme precipitation
Future shifts in timing of regional extreme precipitation Open
Despite the high confidence in the overall intensification of the hydrological cycle in response to global warming, future changes in the spatiotemporal distribution of extreme precipitation remain uncertain. We here explore how climate ch…
View article: Lagrangian Coherence in Atmospheric Blocking
Lagrangian Coherence in Atmospheric Blocking Open
Atmospheric Blocking - also known as Quasi-Stationary Atmospheric States (QSAS) - exert a major influence on mid-latitude atmospheric circulation and are known to be associated with extreme weather events. Previous work has highlighted the…
View article: Projected future changes of very extreme precipitation events over central European river catchments from ensemble climate simulations
Projected future changes of very extreme precipitation events over central European river catchments from ensemble climate simulations Open
Extreme precipitation events can cause flooding in central European river catchments. Climate simulations show that extreme precipitation, especially towards longer return periods, will intensify in a warmer climate for most parts of Europ…
View article: Lagrangian analysis of tracked anticyclonic structures in reanalysis data&#160;
Lagrangian analysis of tracked anticyclonic structures in reanalysis data  Open
Since heatwaves are among the most impactful natural hazards, a better understanding of the atmospheric processes that drive near-surface temperature extremes may help to mitigate the future outcomes of such events in a warming climate. On…
View article: Future changes in North Atlantic winter cyclones in CESM-LE – Part 2: A Lagrangian analysis
Future changes in North Atlantic winter cyclones in CESM-LE – Part 2: A Lagrangian analysis Open
Future changes in extratropical cyclone structure and dynamics may lead to important impacts but are not yet fully understood. In the first part of this study, we have applied a composite approach together with potential vorticity (PV) inv…
View article: Warm conveyor belt activity over the Pacific: modulation by the Madden–Julian Oscillation and impact on tropical–extratropical teleconnections
Warm conveyor belt activity over the Pacific: modulation by the Madden–Julian Oscillation and impact on tropical–extratropical teleconnections Open
Research in the last few decades has revealed that rapidly ascending airstreams in extratropical cyclones – so-called warm conveyor belts (WCBs) – play an important role in extratropical atmospheric dynamics. However on the subseasonal tim…
View article: Lagrangian Coherence in Atmospheric Blocking
Lagrangian Coherence in Atmospheric Blocking Open
Atmospheric blockings -- also known as Quasi-Stationary Atmospheric States (QSAS) -- exert a major influence on mid-latitude atmospheric circulation and are known to be associated with extreme weather events. Previous work has highlighted …
View article: Die Dynamik von extratropischen Zyklonen im Nordatlantik in einem wärmeren Klima
Die Dynamik von extratropischen Zyklonen im Nordatlantik in einem wärmeren Klima Open
Extratropische Zyklone verursachen einen Großteil der extremen Wind- und Niederschlagsereignisse in den mittleren Breiten, und es ist deshalb wichtig zu verstehen, wie sich die Dynamik dieser Systeme in einem wärmeren Klima ä…
View article: Editor comment on egusphere-2023-2353
Editor comment on egusphere-2023-2353 Open
Abstract. Conventionally, teleconnections in the atmosphere are described by correlations between monthly mean fields. These correlations are supposedly caused by stationary Rossby waves. The main hypothesis explored in th…
View article: The climatology and nature of warm-season convective cells in cold-frontal environments over Germany
The climatology and nature of warm-season convective cells in cold-frontal environments over Germany Open
Cold fronts provide an environment particularly favourable for convective initiation in the mid-latitudes and can also be associated with convective hazards such as flooding, wind, hail and lightning. We build a climatology of cold-frontal…
View article: Water isotopic characterisation of the cloud–circulation coupling in the North Atlantic trades – Part 1: A process-oriented evaluation of COSMO <sub>iso</sub> simulations with EUREC <sup>4</sup> A observations
Water isotopic characterisation of the cloud–circulation coupling in the North Atlantic trades – Part 1: A process-oriented evaluation of COSMO <sub>iso</sub> simulations with EUREC <sup>4</sup> A observations Open
Naturally available, stable, and heavy water molecules such as HDO and H218O have a lower saturation vapour pressure than the most abundant light water molecule H216O; therefore, these heavy water molecules preferentially condense and rain…
View article: Supplementary material to "Global estimates of 100-year return values of daily precipitation from ensemble weather prediction data"
Supplementary material to "Global estimates of 100-year return values of daily precipitation from ensemble weather prediction data" Open
View article: Global estimates of 100-year return values of daily precipitation from ensemble weather prediction data
Global estimates of 100-year return values of daily precipitation from ensemble weather prediction data Open
High-impact river floods are often caused by very extreme precipitation events with return periods of several decades or centuries, and the design of flood protection measures thus relies on reliable estimates of the corresponding return v…