Search Results - "DACRE, H. F"

How much Northern Hemisphere precipitation is associated with extratropical cyclones? by Hawcroft, M. K., Shaffrey, L. C., Hodges, K. I., Dacre, H. F.

“…Extratropical cyclones are often associated with heavy precipitation events and can have major socio‐economic impacts. This study investigates how much of the…”
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Linking Atmospheric Rivers and Warm Conveyor Belt Airflows by Dacre, H. F., Martínez-Alvarado, O., Mbengue, C. O.

“…Extreme precipitation associated with extratropical cyclones can lead to flooding if cyclones track over land. However, the dynamical mechanisms by which moist…”
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HOW DO ATMOSPHERIC RIVERS FORM? by Dacre, H. F., Clark, P. A., Martinez-Alvarado, O., Stringer, M. A., Lavers, D. A.

“…The term “atmospheric river” is used to describe corridors of strong water vapor transport in the troposphere. Filaments of enhanced water vapor, commonly…”
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How have surface NO2 concentrations changed as a result of the UK's COVID-19 travel restrictions? by Dacre, H F, Mortimer, A H, Neal, L S

“…Restrictions as a result of the COVID-19 pandemic have led to fewer vehicles on UK roads. Since fuel combustion is responsible for a large fraction of UK…”
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Spatial evaluation of volcanic ash forecasts using satellite observations by Harvey, N J, Dacre, H F

“…The decision to close airspace in the event of a volcanic eruption is based on hazard maps of predicted ash extent. These are produced using output from…”
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An Extratropical Cyclone Atlas: A Tool for Illustrating Cyclone Structure and Evolution Characteristics by Dacre, H. F., Hawcroft, M. K., Stringer, M. A., Hodges, K. I.

“…The cold conveyor belt is a flow of air characterized by lower temperatures that flows rearward, relative to the advancing system and ahead of the warm front,…”
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Evaluating the structure and magnitude of the ash plume during the initial phase of the 2010 Eyjafjallajökull eruption using lidar observations and NAME simulations by Dacre, H. F., Grant, A. L. M., Hogan, R. J., Belcher, S. E., Thomson, D. J., Devenish, B. J., Marenco, F., Hort, M. C., Haywood, J. M., Ansmann, A., Mattis, I., Clarisse, L.

“…The Eyjafjallajökull volcano in Iceland erupted explosively on 14 April 2010, emitting a plume of ash into the atmosphere. The ash was transported from Iceland…”
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Aircraft observations and model simulations of concentration and particle size distribution in the Eyjafjallajökull volcanic ash cloud by Dacre, H. F., Grant, A. L. M., Johnson, B. T.

“…The Eyjafjallajökull volcano in Iceland emitted a cloud of ash into the atmosphere during April and May 2010. Over the UK the ash cloud was observed by the…”
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A new method for evaluating regional air quality forecasts by Dacre, H.F.

“…A Kriging interpolation method is combined with an object-based evaluation measure to assess the ability of the UK Met Office’s dispersion and weather…”
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Meteorological factors controlling low-level continental pollutant outflow across a coast by Peake, D. L, Dacre, H. F, Methven, J, Coceal, O

“…Coastal outflow describes the horizontal advection of pollutants from the continental boundary layer (BL) across a coastline. The outflow can ventilate…”
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Horizontal and vertical structure of the Eyjafjallajökull ash cloud over the UK: a comparison of airborne lidar observations and simulations by Grant, A. L. M., Dacre, H. F., Thomson, D. J., Marenco, F.

“…During April and May 2010 the ash cloud from the eruption of the Icelandic volcano Eyjafjallajökull caused widespread disruption to aviation over northern…”
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A case study of boundary layer ventilation by convection and coastal processes by Dacre, H. F., Gray, S. L., Belcher, S. E.

“…It is often assumed that ventilation of the atmospheric boundary layer is weak in the absence of fronts, but is this always true? In this paper we investigate…”
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Evaluating the ability of a numerical weather prediction model to forecast tracer concentrations during ETEX 2 by Dacre, H.F.

“…In this paper the meteorological processes responsible for transporting tracer during the second ETEX (European Tracer EXperiment) release are determined using…”
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Classifying dynamical forcing mechanisms using a climatology of extratropical cyclones by Gray, S. L., Dacre, H. F.

“…A climatology of almost 700 extratropical cyclones is compiled by applying an automated feature‐tracking algorithm to a database of objectively identified…”
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Life‐cycle simulations of shallow frontal waves and the impact of deformation strain by Dacre, H. F., Gray, S. L.

“…The life cycle of shallow frontal waves and the impact of deformation strain on their development is investigated using the idealized version of the Met Office…”
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Characterizing the Atmospheric Conditions Leading to Large Error Growth in Volcanic Ash Cloud Forecasts by Dacre, H. F., Harvey, N. J.

“…Volcanic ash poses an ongoing risk to safety in the airspace worldwide. The accuracy with which volcanic ash dispersion can be forecast depends on the…”
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Quantifying the climatological relationship between extratropical cyclone intensity and atmospheric precursors by Dacre, H. F., Gray, S. L.

“…We introduce a novel technique in which linear regression analysis is applied to clusters of tracked cyclones to statistically assess the factors controlling…”
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The impact of deformation strain on the formation of banded clouds in idealized modelling experiments by Gray, S. L., Dacre, H. F.

“…Experiments are performed using an idealized version of an operational forecast model to determine the impact on banded frontal clouds of the strength of…”
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Which Extratropical Cyclones Contribute Most to the Transport of Moisture in the Southern Hemisphere? by Sinclair, V. A., Dacre, H. F.

“…Predicted changes in Southern Hemisphere (SH) precipitation and Antarctic ice mass correspond to variations in the meridional moisture flux (MMF). Thirty‐five…”
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How accurate are volcanic ash simulations of the 2010 Eyjafjallajökull eruption? by Dacre, H. F., Harvey, N. J., Webley, P. W., Morton, D.

“…In the event of a volcanic eruption the decision to close airspace is based on forecast ash maps, produced using volcanic ash transport and dispersion models…”
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