Ondřej Lhotka
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View article: Heat Waves in Regional Climate Models: Three‐Dimensional Insight and Links to Atmospheric Circulation Over Middle Europe
Heat Waves in Regional Climate Models: Three‐Dimensional Insight and Links to Atmospheric Circulation Over Middle Europe Open
To improve understanding of heat waves' biases in regional climate models (RCMs), we employ a novel approach to study them as three‐dimensional phenomena. Heat waves over Middle Europe are classified into four types based on their vertical…
View article: Vertical characteristics of heat waves at sub-daily scales in ERA5 over Europe
Vertical characteristics of heat waves at sub-daily scales in ERA5 over Europe Open
Heat waves are considered among the greatest hazards associated with climate change. Defined as prolonged periods of anomalously high temperatures during summer, they are linked to substantial impacts on both natural ecosystems and human s…
View article: Precipitation variability in CMIP6 climate models across the North Atlantic–European region and their Links to Atmospheric Circulation
Precipitation variability in CMIP6 climate models across the North Atlantic–European region and their Links to Atmospheric Circulation Open
Long-term changes in climate variability represent an important aspect of climate change, with various impacts on society and environment. In this study, we analyze outputs from 13 CMIP6 global climate models (GCMs) across the North Atlant…
View article: Solar cycle signatures in lightning activity
Solar cycle signatures in lightning activity Open
The cross-correlation between annual lightning frequency and solar activity and the heliospheric magnetic field (HMF) is examined on a global scale using corrected data from the World Wide Lightning Location Network (WWLLN) for the period …
View article: Atmospheric circulation associated with 3D heat wave types in Middle Europe
Atmospheric circulation associated with 3D heat wave types in Middle Europe Open
Heat waves are phenomena associated with large negative impacts on society and environment. We evaluate links between atmospheric circulation and three-dimensional (3D) heat wave types in Middle Europe (one of the PRUDENCE regions) over 19…
View article: Three-dimensional analysis reveals diverse heat wave types in Europe
Three-dimensional analysis reveals diverse heat wave types in Europe Open
Heat waves are among the most studied atmospheric hazards but commonly investigated near-surface temperature patterns provide only limited insight into their complex structure. Here we propose and evaluate a novel approach to the analysis …
View article: Warm‐Season Drying Across Europe and Its Links to Atmospheric Circulation
Warm‐Season Drying Across Europe and Its Links to Atmospheric Circulation Open
We study drying trends across the central latitude strip of Europe (47.5–52.5°N and 2.5–27.5°E) during 1980–2019 and their links to atmospheric circulation. Daily differences between potential evapotranspiration and precipitation (PET–P) c…
View article: Links of atmospheric circulation to cold days in simulations of EURO-CORDEX climate models for central Europe
Links of atmospheric circulation to cold days in simulations of EURO-CORDEX climate models for central Europe Open
Despite ongoing climate change and warming, extreme cold events still negatively affect human society. Since cold air incursions are related to specific circulation patterns, the main aims of this study are (1) to validate how well current…
View article: Stochastic Spatial Weather Generator SPAGETTA: Development and Applications
Stochastic Spatial Weather Generator SPAGETTA: Development and Applications Open
Stochastic weather generators are one of the most frequently used methodologies for producing input weather series for various process-based models (especially agricultural crop growth models and hydrological rainfall-runoff models) used e…
View article: Precipitation variability in CMIP6 climate models across the North Atlantic–European region
Precipitation variability in CMIP6 climate models across the North Atlantic–European region Open
Long-term changes in climate variability are an important aspect of the climate change with various impacts on society and environment. In contrast to numerous studies which evaluated projected changes in mean values and extremes of precip…
View article: Links between heat waves, drought, and atmospheric circulation in Central Europe
Links between heat waves, drought, and atmospheric circulation in Central Europe Open
Heat waves and drought are phenomena associated with large negative impacts on society and environment. Their common features include increasing frequency and intensity in recent decades in many regions of Europe, as well as interconnected…
View article: Capability of regional climate models to reproduce three-dimensional (3D) characteristics of heat waves
Capability of regional climate models to reproduce three-dimensional (3D) characteristics of heat waves Open
In this study, we evaluate capabilities of 9 CORDEX regional climate models (RCMs) with lateral boundary conditions provided by the ERA-Interim reanalysis to reproduce three-dimensional (3D) structures of heat waves in several European reg…
View article: Solar cycle signatures in lightning activity
Solar cycle signatures in lightning activity Open
The cross-correlation between lightning occurrence and cosmic ray intensity, solar activity and solar wind is examined on a global scale using data from the World Wide Lightning Location Network (WWLLN) for the period 2009 to 2022. The cro…
View article: Validation and Selection of a Representative Subset from the Ensemble of EURO-CORDEX EUR11 Regional Climate Model Outputs for the Czech Republic
Validation and Selection of a Representative Subset from the Ensemble of EURO-CORDEX EUR11 Regional Climate Model Outputs for the Czech Republic Open
To better understand the impact of climate change at a given location, it is crucial to consider a wide range of climate models that are representative of the area. In this study, we emphasize the importance of the careful validation and s…
View article: Prolongation of Compound Dry–Hot Seasons Over Europe Under Climate Change Scenarios
Prolongation of Compound Dry–Hot Seasons Over Europe Under Climate Change Scenarios Open
Compound effects of drought and heat are regarded as one of the greatest hazards in relation to climate change. We study characteristics of dry–hot seasons in Europe in an ensemble of CORDEX regional climate models (RCMs). Evaluation again…
View article: Climate change scenarios of hazardous compound events in Central Europe
Climate change scenarios of hazardous compound events in Central Europe Open
Many recent high-impact weather and climate events developed due to several concurrent climatic drivers amplifying their negative impacts on society and environment. In this paper, we analyse scenarios of future changes in cold–windy and d…
View article: Links between major heat waves, drought, and atmospheric circulation in Central Europe
Links between major heat waves, drought, and atmospheric circulation in Central Europe Open
Heat waves and drought are phenomena associated with large negative impacts on society and the environment. Their common features include increasing frequency and intensity in recent decades in many regions of Europe, as well as the interc…
View article: Recent European heat waves under three dimensional insight
Recent European heat waves under three dimensional insight Open
In recent summers, Europe was struck by numerous heat extremes that have almost completely redrawn the map of the most severe heat waves recorded across the continent (Lhotka and Kyselý 2022). For example, daily maximum temperature ov…
View article: Recent and Future Changes in Spatiotemporal Variability of Precipitation and Temperature and the Impacts on Selected Precipitation-Temperature Indices
Recent and Future Changes in Spatiotemporal Variability of Precipitation and Temperature and the Impacts on Selected Precipitation-Temperature Indices Open
While much effort has been devoted to analyzing long-term changes of temperature and precipitation in mean values and extremes, studies on changes in variability have been rather scarce. Trends in variability are, however, important, among…
View article: Trends in drought across Europe and their links to atmospheric circulation
Trends in drought across Europe and their links to atmospheric circulation Open
We study trends in drought across the central latitude strip of Europe (defined as the region 47.5–52.5 °N and 2.5°W–32.5°E) during 1950–2019, and their links to atmospheric circulation. Drought characteris…
View article: Compound dry–hot seasons in Europe – climate change scenarios and uncertainties
Compound dry–hot seasons in Europe – climate change scenarios and uncertainties Open
Compound effects of drought and heat are regarded as one of the largest hazards in relation to climate change. Characteristics of dry–hot seasons in Europe are studied in an ensemble of CORDEX regional climate models (RCMs). Evaluati…
View article: Projected changes in precipitation variability over Europe in CMIP6 climate models
Projected changes in precipitation variability over Europe in CMIP6 climate models Open
Changes in the amount, intensity, frequency and type of precipitation are observed in some places over recent decades (IPCC 2021). While much effort has been devoted to analyzing long-term changes in mean values and extremes, studies on ch…
View article: Spatial and Temporal Variability of Precipitation and Temperature: Analysis of Recent Changes and Future Development with Use of the Weather Generator and RCM-Based Climate Change Scenarios
Spatial and Temporal Variability of Precipitation and Temperature: Analysis of Recent Changes and Future Development with Use of the Weather Generator and RCM-Based Climate Change Scenarios Open
While much effort has been devoted to analyzing long-term changes of temperature and precipitation in mean values and extremes, studies on changes in variability have been rather scarce. Trends in variability are, however, important, among…
View article: The 2021 European Heat Wave in the Context of Past Major Heat Waves
The 2021 European Heat Wave in the Context of Past Major Heat Waves Open
The past two decades in Europe have been characterized by numerous major heat waves, with record‐breaking temperatures reported also during the summer of 2021. While most previous studies on heat waves were based on land‐only datasets (sta…
View article: Varying precipitation variability over Europe in observed data and climate models
Varying precipitation variability over Europe in observed data and climate models Open
<p>Since long-term changes in climate variability are an important aspect of climate change, it is necessary to know whether and how they will change in the future. To this end, it is also important that they are simulated correctly …
View article: Circulation and Climate Variability in the Czech Republic between 1961 and 2020: A Comparison of Changes for Two &#8220;Normal&#8221; Periods
Circulation and Climate Variability in the Czech Republic between 1961 and 2020: A Comparison of Changes for Two “Normal” Periods Open
<p>Thirty-year periods are treated in climatology as spans with relatively representative and stable climatic patterns, which can be used for calculating climate normals. Annual and seasonal series of circulation types were used to c…
View article: Evaluation of temperature extremes over central Europe and their links to atmospheric circulation in CORDEX RCMs
Evaluation of temperature extremes over central Europe and their links to atmospheric circulation in CORDEX RCMs Open
<p>Automated classifications of atmospheric circulation are routinely used to link synoptic-scale circulation with temperature variability. Though powerful in general, classifications have considerable limitations regarding their ski…
View article: European heat waves of summer 2021 in the context of past major heat waves
European heat waves of summer 2021 in the context of past major heat waves Open
<p>Climate change-induced rise in global temperatures is linked to changes in hot extremes. The recent summer of 2021 was marked by extremely high temperatures over the Mediterranean, which together with numerous wildfires considerab…
View article: The Spatial Weather Generator SPAGETTA: Hard Times of its Adolescence
The Spatial Weather Generator SPAGETTA: Hard Times of its Adolescence Open
<p>Stochastic weather generators (WGs) are tools for producing weather series, mimicking statistical properties of their real-world counterparts. They are often used in climate change impact experiments as a source of the data repres…
View article: Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation
Hydroclimate variability in the Czech Republic studied through subjective and objective classifications of atmospheric circulation Open
<p>Investigation of the relationship between climatological variables and circulation patterns expressed by various classifications of circulation types is a key procedure in synoptic climatology. This study provides new insights int…