Central European tornado environments as viewed from a potential vorticity and Lagrangian perspective

Graf, M.; Sprenger, Michael; Moore, Richard W.

doi:10.1016/j.atmosres.2011.01.007

Cited by 13 publications

(10 citation statements)

References 40 publications

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“…Transport from the east is observed in particular in connection with thunderstorms in Germany, but less so in France. Similar results are reported by Busch (2013) for selected (large) hail events and by Graf et al (2011) for tornadoes in Europe. For example, Busch (2013) found using a Lagrangian method based on backward trajectories that air mass transport occurs mainly from the North Atlantic.…”

Section: Anomaly Composites During Blockingsupporting

confidence: 89%

“…Similar results are reported by Busch () for selected (large) hail events and by Graf et al . () for tornadoes in Europe. For example, Busch () found using a Lagrangian method based on backward trajectories that air mass transport occurs mainly from the North Atlantic.…”

Section: Environmental Conditions During Blockingmentioning

confidence: 96%

“…Using the same method, Graf et al . () observed that most low‐level backward trajectories of European tornadoes originated over the Atlantic Ocean, while some events are also related to air from the Mediterranean region. Trefalt et al .…”

Section: Environmental Conditions During Blockingmentioning

confidence: 97%

“…In addition, isolated trajectories also originated in the Mediterranean region and flowed around the Alps. Using the same method, Graf et al (2011) observed that most low-level backward trajectories of European tornadoes originated over the Atlantic Ocean, while some events are also related to air from the Mediterranean region. Trefalt et al (2018) also studied moisture sources for a hailstorm in northern Switzerland and identified the Mediterranean and local sources as the main moisture sources.…”

Section: Anomaly Composites During Blockingmentioning

confidence: 99%

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Relationship between atmospheric blocking and warm‐season thunderstorms over western and central Europe

Mohr

Wandel

Lenggenhager

et al. 2019

Quart J Royal Meteoro Soc

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A statistically significant link is presented between atmospheric blocking located over the eastern North Atlantic and northern Europe and warm‐season thunderstorm activity over western and central Europe. Lightning data from 2001 to 2014 were used to identify thunderstorm days and blocking events were extracted from the ERA‐Interim reanalysis using an objective identification algorithm. The statistical link between the two phenomena is established through odds ratio analysis. Two areas – one over the eastern part of the North Atlantic and one over the Baltic Sea – were identified as locations where blocking influences the occurrence of deep moist convection in parts of western and central Europe. Based on the mean ambient conditions on days with blocking in these two areas, well‐known dynamic and thermodynamic mechanisms supporting or suppressing the development of thunderstorms were confirmed. The anticyclonic circulation of a block over the eastern part of the North Atlantic leads to a northerly to northwesterly advection of dry and stable air masses into Europe on the eastern flank of the block. In addition, these environmental conditions are on average associated with large‐scale subsidence of air masses (convection‐inhibiting conditions). In contrast, the southerly to southwesterly advection of warm, moist and unstable air masses on the western flank of a block over the Baltic Sea results in convection‐favouring conditions over western and central Europe. Both blocking situations are on average associated with weak wind speeds at mid‐tropospheric levels and with weak wind shear. As a consequence, thunderstorms related to atmospheric blocking over the Baltic Sea tend to be on average less organised.

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Section: Anomaly Composites During Blockingsupporting

confidence: 89%

Section: Environmental Conditions During Blockingmentioning

confidence: 96%

Section: Environmental Conditions During Blockingmentioning

confidence: 97%

Section: Anomaly Composites During Blockingmentioning

confidence: 99%

See 2 more Smart Citations

Relationship between atmospheric blocking and warm‐season thunderstorms over western and central Europe

Mohr

Wandel

Lenggenhager

et al. 2019

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

show abstract

“…A comparison with values from U.S. studies indicate that Bangladesh CAPE values are overall much higher than in U.S. significant tornadoes (EF2 or greater). Median values of MLCAPE for the cases highlighted in Table A1 are 48% (Cohen, 2010) and 43% (Thompson et al, 2003 sigtor category) greater than studies over the U.S. CAPE values are also considerably higher than those found in European significant tornadoes (Romero et al, 2007;Graf et al, 2011). Given the large discrepancy in CAPE values between Bangladesh and U.S. tornado events, we may question if midlevel lapse rates are comparable; however, the results in Fig.…”

Section: Tablecontrasting

confidence: 46%

The environment associated with significant tornadoes in Bangladesh

Bikos

Finch

Case

2016

Atmospheric Research

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a b s t r a c t a r t i c l e i n f oThis paper investigates the environmental parameters favoring significant tornadoes in Bangladesh through a simulation of ten high-impact events. A climatological perspective is first presented on classifying significant tornadoes in Bangladesh, noting the challenges since reports of tornadoes are not documented in a formal manner. The statistical relationship between United States and Bangladesh tornado-related deaths suggests that significant tornadoes do occur in Bangladesh so this paper identifies the most significant tornadic events and analyzes the environmental conditions associated with these events. Given the scarcity of observational data to assess the near-storm environment in this region, high-resolution (3-km horizontal grid spacing) numerical weather prediction simulations are performed for events identified to be associated with a significant tornado. In comparison to similar events over the United States, significant tornado environments in Bangladesh are characterized by relatively high convective available potential energy, sufficient deep-layer vertical shear, and a propensity for deviant (i.e., well to the right of the mean flow) storm motion along a low-level convergence boundary.

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Further investigation on stratospheric air intrusion into the troposphere during the episode of tropical cyclone: Numerical simulation and MST radar observations

Das

Sijikumar

Uma

2011

Atmospheric Research

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Central European tornado environments as viewed from a potential vorticity and Lagrangian perspective

Cited by 13 publications

References 40 publications

Relationship between atmospheric blocking and warm‐season thunderstorms over western and central Europe

Relationship between atmospheric blocking and warm‐season thunderstorms over western and central Europe

The environment associated with significant tornadoes in Bangladesh

Further investigation on stratospheric air intrusion into the troposphere during the episode of tropical cyclone: Numerical simulation and MST radar observations

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