An Analytical Model Describing the Basic Structure and Development of Mature Extratropical Cyclones

Heijboer, LC; Kelder, H.; Saraber, M.J.M.; Velthoven, van Pfj Peter

doi:10.1175/1520-0493(1996)124<0571:aamdtb>2.0.co;2

Cited by 3 publications

(2 citation statements)

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“…Typical cyclones generally resembled the idealized extratropical cyclone described by Heuboer et al (1996), though the size of the cyclones analyzed in the current study varied from an area of several states to almost the entire CONUS.…”

Section: Methodsmentioning

confidence: 63%

Study of Synoptic-Scale Tornado Regimes

Garner

2021

EJSSM

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The significant tornado parameter (STP) has been used by severe-thunderstorm forecasters since 2003 to identify environments favoring development of strong to violent tornadoes. The STP and its individual components of mixed-layer (ML) CAPE, 0-6-km bulk wind difference (BWD), 0-1-km storm-relative helicity (SRH), and ML lifted condensation level (LCL) have been calculated here using archived surface objective analysis data, and then examined during the period 2003-2010 over the central and eastern United States. These components then were compared and contrasted in order to distinguish between environmental characteristics analyzed for three different synoptic-cyclone regimes that produced significantly tornadic supercells: cold fronts, warm fronts, and drylines. Results show that MLCAPE contributes strongly to the dryline significant-tornado environment, while it was less pronounced in cold-frontal significant-tornado regimes. The 0-6-km BWD was found to contribute equally to all three significant tornado regimes, while 0-1-km SRH more strongly contributed to the cold-frontal significant-tornado environment than for the warm-frontal and dryline regimes.

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Section: Methodsmentioning

confidence: 63%

Study of Synoptic-Scale Tornado Regimes

Garner

2021

EJSSM

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“…This has already been recognised for the northern hemisphere for almost seventy years (Dobson et al, 1928 andDobson, 1968). In general, a high-pressure region will give rise to low ozone values, while an extratropical low will show up as a region with high gradients in total-ozone values and high total-ozone values behind the centre of the low (Heijboer et al, 1996). This relation can be quantified using the correlation between vertically integrated potential vorticity and total ozone, as found by Allaart et al (1993).…”

Section: Introductionmentioning

confidence: 87%

On the assimilation of total-ozone satellite data

1996

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A two-dimensional model for advection and data assimilation of total-ozone data has been developed. The Assimilation Model KNMI (AMK) is a global model describing the transport of the column amounts of ozone, by a wind field at a single pressure level, assuming that total ozone behaves as a passive tracer. In this study, ozone column amounts measured by the TIROS Operational Vertical Sounder (TOVS) instrument on the National Oceanic and Atmospheric Administration (NOAA) polar satellites and wind fields from the Meteorological Archive and Retrieval System (MARS) archives at ECMWF have been used. By means of the AMK, the incomplete space-time distribution of the TOVS measurements is filled in and global total-ozone maps at any given time can be obtained. The choice of wind field to be used for transporting column amounts of ozone is extensively discussed. It is shown that the 200-hPa wind field is the optimal single-pressure-level wind field for advecting total ozone. Assimilated ozone fields are the basic information for research on atmospheric chemistry and dynamics, but are also important for the validation of ozone measurements.

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