The structure and evolution of a wintertime occluded front

Saarikivi, Pirkko; Puhakka, Timo

doi:10.3402/tellusa.v42i1.11866

Cited by 7 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Instead, the prefrontal stratiform precipitation may be punctuated with a variety of precipitation bands associated with an ascent of 30-40 cm s −1 (e.g., Elliott and Hovind 1964), which occasionally reaches as high as 1-6 m s −1 (e.g., Wang and Hobbs 1983;Cronce et al 2007), and enhanced precipitation rates (e.g., Kreitzberg 1968;Kreitzberg and Brown 1970;Hobbs et al 1975;Houze et al 1976a,b;Hertzman and Hobbs 1988;Saarikivi and Puhakka 1990;Bader et al 1995, Fig. 5.4.8;Martin 1998b;Hand et al 2004;Novak et al 2004Novak et al , 2010Grim et al 2007).…”

Section: Tenet 3 : Occlusion Means That the Cyclone Will Stop Deepeningmentioning

confidence: 99%

Occluded Fronts and the Occlusion Process: A Fresh Look at Conventional Wisdom

Schultz

Vaughan

2011

Bulletin of the American Meteorological Society

View full text Add to dashboard Cite

show abstract

Section: Tenet 3 : Occlusion Means That the Cyclone Will Stop Deepeningmentioning

confidence: 99%

Occluded Fronts and the Occlusion Process: A Fresh Look at Conventional Wisdom

Schultz

Vaughan

2011

Bulletin of the American Meteorological Society

View full text Add to dashboard Cite

show abstract

“…In the last 40 years, many studies have attempted to gain additional insight into the mesoscale aspects of fronts. Exceptions include an observational study of an occluded front (Saarikivi and Puhakka 1990), a modeling/observational study of a warm front (Kemppi and Sinclair 2011), and an observational study of an intense, sharp cold front in Moscow (Lokoshchenko and Elansky 2006). Numerical modeling and observational studies of cold fronts, focusing on the mesoscale structure, have been conducted in different geographic regions.…”

Section: Introductionmentioning

confidence: 99%

Structure of a Narrow Cold Front in the Boundary Layer: Observations versus Model Simulation

Sinclair

Niemelä

Leskinen

2012

Monthly Weather Review

View full text Add to dashboard Cite

A narrow and shallow cold front that passed over Finland during the night 30-31 October 2007 is analyzed using model output and observations primarily from the Helsinki Testbed. The aim is to describe the structure of the front, especially within the planetary boundary layer, identify how this structure evolved, and determine the ability of a numerical model to correctly predict this structure. The front was shallow with a small (2.5-3 K) temperature decrease associated with it, which is attributed to the synoptic evolution of the cold front from a frontal wave on a mature, trailing cold front in a region of weak upper-level forcing and where the midtroposphere was strongly stratified. Within the boundary layer, the frontal surface was vertical and the frontal zone was narrow (,8 km). The small cross-front scale was probably a consequence of the weak frontolytical turbulent mixing occurring at night, at high latitudes, combined with strong, localized frontogenetic forcing driven by convergence. The model simulated the mesoscale evolution of the front well, but overestimated the width of the frontal zone. Within the boundary layer, the model adequately predicted the stratification and near-surface temperatures ahead of, and within, the frontal zone, but failed to correctly predict the thermal inversion that developed in the stably stratified postfrontal air mass. This case study highlights the complex structure of fronts both within the nocturnal boundary layer, and in a location far from regions of cyclogenesis, and hence the challenges that both forecasters and operational models face.

show abstract

Extratropical Cyclones: Their Mesoscale Structure, Precipitation and Role in the Transport of Water

Stewart¹

1996

Radiation and Water in the Climate System

View full text Add to dashboard Cite

The structure and evolution of a wintertime occluded front

Cited by 7 publications

References 18 publications

Occluded Fronts and the Occlusion Process: A Fresh Look at Conventional Wisdom

Occluded Fronts and the Occlusion Process: A Fresh Look at Conventional Wisdom

Structure of a Narrow Cold Front in the Boundary Layer: Observations versus Model Simulation

Extratropical Cyclones: Their Mesoscale Structure, Precipitation and Role in the Transport of Water

Contact Info

Product

Resources

About