Nili Harnik
YOU?
Author Swipe
View article: On storm tracks, weather regimes, and a wave breaking recipe
On storm tracks, weather regimes, and a wave breaking recipe Open
View article: Extreme weather anomalies and surface signatures associated with merged Atlantic–African jets during northern winter
Extreme weather anomalies and surface signatures associated with merged Atlantic–African jets during northern winter Open
The winter-long merging of the African and Atlantic jets during 2009–2010 was associated with extreme winter weather across the Northern Hemisphere. Past studies have shown that merging of these two jets is linked to weaker Atlantic eddy a…
View article: Rare events algorithm study of extreme double jet summers and their connection to heatwaves over Eurasia
Rare events algorithm study of extreme double jet summers and their connection to heatwaves over Eurasia Open
Several large scale circulation patterns have been identified in relation to extreme Northern Hemisphere summer heatwaves. Three main ones are a double jet over Eurasia, a positive phase of the summer northern annular mode, and a quasi-wav…
View article: Rare event algorithm study of extreme double jet summers and their connection to heatwaves over Eurasia
Rare event algorithm study of extreme double jet summers and their connection to heatwaves over Eurasia Open
Several large-scale circulation patterns have been linked to extreme summer heatwaves in the Northern Hemisphere, notably the double jet structure over Eurasia, the positive phase of the summer Northern Annular Mode (NAM), and quasi-wave-3…
View article: A New Quantitative Framework for Mediterranean Cyclogenesis: Local Wave Activity and Cross-Basin Dynamics
A New Quantitative Framework for Mediterranean Cyclogenesis: Local Wave Activity and Cross-Basin Dynamics Open
The North Atlantic large-scale circulation is known to affect Mediterranean cyclonic activity, representing a unique case of interacting storm tracks. Variability in the North Atlantic, such as extratropical storm activity, jet stream posi…
View article: Rossby wave resonance for idealized jets on a beta-plane
Rossby wave resonance for idealized jets on a beta-plane Open
This paper analyzes Rossby wave resonance along a circumglobal midlatitude jet in the framework of the linearized inviscid barotropic vorticity equation on a zonally periodic beta-plane. Zonally symmetric Gaussian-shaped westery jets of va…
View article: Quasi-Resonance in a Leaky Waveguide?
Quasi-Resonance in a Leaky Waveguide? Open
Large-amplitude jet stream undulations, central to impactful phenomena such as blocking, sudden stratospheric warmings, and extreme weather, have been suggested to occasionally occur as a result of resonant amplification. A barotropic β -p…
View article: Influence of a local diabatic heating source on the midlatitude circulation
Influence of a local diabatic heating source on the midlatitude circulation Open
Diabatic heating due to latent heat release in the storm tracks plays an important but poorly understood role in the midlatitude circulation. To examine how localised diabatic heating affects the circulation, a dry model is used to apply m…
View article: Extreme weather anomalies and surface signatures associated with merged Atlantic-African jets during winter
Extreme weather anomalies and surface signatures associated with merged Atlantic-African jets during winter Open
The winter-long merging of the African and Atlantic jets is associated with extreme winter weather across the Northern hemisphere. Past studies have shown that merging of the Atlantic and African jets is linked to weaker Atlantic eddy acti…
View article: The connection between North Atlantic storm track regimes and eastern Mediterranean cyclonic activity
The connection between North Atlantic storm track regimes and eastern Mediterranean cyclonic activity Open
A unique chain connects the flow over the North Atlantic and the development of cyclones within the Mediterranean basin. One typical mechanism includes several successive processes: upper-level flow perturbations upstream cause Rossby wave…
View article: Edge-wave phase shifts versus normal-mode phase tilts in an Eady problem with a sloping boundary
Edge-wave phase shifts versus normal-mode phase tilts in an Eady problem with a sloping boundary Open
One mechanistic interpretation of baroclinic instability is that of mutual constructive interference of Rossby edge waves. The suppression of baroclinic instability over slopes has been widely established, where previous research argues th…
View article: Heatwave Location Changes in Relation to Rossby Wave Phase Speed
Heatwave Location Changes in Relation to Rossby Wave Phase Speed Open
Surface anticyclones connected to the ridge of an upper‐tropospheric Rossby wave are the main dynamical drivers of mid‐latitude summer heatwaves. It is, however, unclear to what extent an anomalously low zonal phase speed of the wave in th…
View article: The three-way feedback between North-Atlantic circulation regimes, Rossby wave breaking, and surface weather.
The three-way feedback between North-Atlantic circulation regimes, Rossby wave breaking, and surface weather. Open
Rossby Wave Breaking (RWB) events describe the last stage in the life cycle of baroclinic atmospheric disturbances. These breaking events can strongly influence the large-scale circulation and are tightly related to low-frequency weather r…
View article: A Local Wave Activity Interpretation of the Large Scale Drivers Behind the Projected Drying of the Mediterranean
A Local Wave Activity Interpretation of the Large Scale Drivers Behind the Projected Drying of the Mediterranean Open
The projected drying of the Mediterranean basin is a robust signal of future climate change. Dynamically, this is manifested as a large anticyclonic anomaly covering the region, alongside a decrease in cyclonic activity. Various processes …
View article: Winter-long Atlantic-African jet merging and the effect on extreme weather
Winter-long Atlantic-African jet merging and the effect on extreme weather Open
Variability in the jet stream can have a significant influence on the distribution of extreme weather, with winter-long anomalies leading to extreme seasons. During winter of 2009/2010, the Atlantic and African jets were anomalously merged…
View article: Comment on egusphere-2024-1054
Comment on egusphere-2024-1054 Open
Abstract. A unique chain connects the flow over the North Atlantic and the development of cyclones within the Mediterranean basin. One typical mechanism includes several successive processes: upper-level flow perturbations…
View article: Edge-wave phase-shifts versus normal-mode phase-tilts in an Eady problem with a sloping boundary
Edge-wave phase-shifts versus normal-mode phase-tilts in an Eady problem with a sloping boundary Open
One mechanistic interpretation of baroclinic instability is that of mutual constructive interference of Rossby edge-waves. While the two edge-waves and their relative phase-shifts are invoked as part of the mechanistic interpretation, the …
View article: The Connection Between North Atlantic Storm Track Regimes and Eastern Mediterranean Cyclonic Activity
The Connection Between North Atlantic Storm Track Regimes and Eastern Mediterranean Cyclonic Activity Open
A unique chain connects the flow over the North Atlantic and the development of cyclones within the Mediterranean basin. One typical mechanism includes several successive processes: upper-level flow perturbations upstream cause Rossby wave…
View article: Persistent winter merged jets over the Atlantic and extreme weather anomalies
Persistent winter merged jets over the Atlantic and extreme weather anomalies Open
Variabilities in the jet streams have a significant influence on our weather and climate, and could potentially increase the likelihood of a range of extreme weather events. The winter of 2009/2010 witnessed an unusual equatorward displace…
View article: Spontaneous equatorial flow reversals at the equator in  moist shallow water turbulence
Spontaneous equatorial flow reversals at the equator in  moist shallow water turbulence Open
Equatorial superrotation is a striking feature in planetary circulations, also found in atmospheric circulation models. Geological evidence shows that Earth was in a state of super-rotation during the Eocene and Pliocene. On Earth, su…
View article: Influence of diabatic heating on the maintenance of the midlatitude jet
Influence of diabatic heating on the maintenance of the midlatitude jet Open
Diabatic heating due to latent heat release in the storm tracks plays an important but poorly understood role in the maintenance of the zonal-mean midlatitude circulation. To examine how the midlatitude circulation is maintained in the pre…
View article: Long-Term Trends of the Atmospheric Circulation and Moist Static Energy Budget in the JRA-55 Reanalysis 
Long-Term Trends of the Atmospheric Circulation and Moist Static Energy Budget in the JRA-55 Reanalysis  Open
The atmospheric circulation response to global warming is an important problem that is theoretically still not well understood. This is a particular issue since climate model simulations provide uncertain, and at times contradic- tory, pro…
View article: The relation between Rossby wave-breaking events and low-level weather systems
The relation between Rossby wave-breaking events and low-level weather systems Open
Rossby wave-breaking events describe the last stage in the life cycle of baroclinic atmospheric disturbances. These breaking events can strongly influence large-scale circulation and are also related to weather extremes such as heat waves,…
View article: Rossby Wave Phase Speed Influences Heatwave Location through a Shift in Storm Track Position
Rossby Wave Phase Speed Influences Heatwave Location through a Shift in Storm Track Position Open
Surface anticyclones connected to the ridge of an upper-tropospheric Rossby wave are the dynamical drivers of mid-latitude summer heatwaves. It is, however, unclear to which extent an anomalously low zonal phase speed of the wave in the up…
View article: A <scp>multiscale</scp> approach to statistical downscaling of daily precipitation: Israel as a test case
A <span>multiscale</span> approach to statistical downscaling of daily precipitation: Israel as a test case Open
Rainfall in the Eastern Mediterranean is strongly modulated by complex topography and localized mesoscale processes. General circulation models (GCMs) struggle to capture daily precipitation variability in the region, both in time and in s…
View article: The role of tropical and extra-tropical waves in the Hadley circulation
The role of tropical and extra-tropical waves in the Hadley circulation Open
The tropical overturning circulation is examined in a moist aquaplanet general circulation model forced using a non-interactive sea surface temperature (SST) distribution that varies between a present-day Earth-like profile and one that is…
View article: Comment on egusphere-2023-534
Comment on egusphere-2023-534 Open
Abstract. Rossby wave breaking events describe the last stage in the life-cycle of baroclinic atmospheric disturbances. These breaking events can strongly influence the large-scale circulation, and are also related to weat…
View article: Comment on egusphere-2023-534
Comment on egusphere-2023-534 Open
Abstract. Rossby wave breaking events describe the last stage in the life-cycle of baroclinic atmospheric disturbances. These breaking events can strongly influence the large-scale circulation, and are also related to weat…
View article: Comment on egusphere-2023-534
Comment on egusphere-2023-534 Open
Abstract. Rossby wave breaking events describe the last stage in the life-cycle of baroclinic atmospheric disturbances. These breaking events can strongly influence the large-scale circulation, and are also related to weat…
View article: Supplementary material to "The intrinsic relationship between cyclones, anticyclones, and Rossby Wave Breakings in the North-Atlantic"
Supplementary material to "The intrinsic relationship between cyclones, anticyclones, and Rossby Wave Breakings in the North-Atlantic" Open