The structure of an inversion above a convective boundary layer as observed using high-power pulsed doppler radar

Browning, K. A.; Starr, J. R.; Whyman, A. J.

doi:10.1007/bf02265226

Cited by 40 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This was because the sensor travelled in and out of two different regions; the upper region was warmer than that below with no turbulence, the other region (onshore flow) was colder than above, turbulent, with a SE wind of 2 m s '. This is typical of the flow between two layers having different characteristics and is similar to that observed by Browning et al (1973) andReadings et al (1973) in convective boundary layers. They referred to such motion as hummock motion.…”

Section: Theturbulent Structure Afterthe Penetration Ofthe Lake Breezsupporting

confidence: 61%

Observation of lake breeze penetration and subsequent development of the thermal internal boundary layer for the Nanticoke II Shoreline Diffusion Experiment

Ogawa

Ohara

Wakamatsu

et al. 1986

Boundary-Layer Meteorol

View full text Add to dashboard Cite

The turbulent structure of the lake breeze penetration and subsequent development of the thermal internal boundary layer (TIBL) was observed using a kytoon-mounted ultrasonic anemometer-thermometer. The lake breeze penetrated with an upward rolling motion associated with the upward flow near the lake breeze front. After the lake breeze front passed, the behaviors of the velocity and temperature at the top of the lake breeze layer were similar to those found in convective boundary layers (CBL). Comparing %I@, 3 %.lW* and a,,,/~ * between the present observation of TIBL development after the passage of the lake breeze front and CBL data from the literature, the uJBiB* values showed reasonable agreement; however, uJw* and c,Jw* had smaller values in the TIBL than in the CBL at higher altitudes. This is due to the differences in the mean velocity profiles. While the CBL has a uniform velocity profile, the TIBL has a peak at lower elevation due to the lake breeze penetration; the velocity then decreases with height.

show abstract

Section: Theturbulent Structure Afterthe Penetration Ofthe Lake Breezsupporting

confidence: 61%

Observation of lake breeze penetration and subsequent development of the thermal internal boundary layer for the Nanticoke II Shoreline Diffusion Experiment

Ogawa

Ohara

Wakamatsu

et al. 1986

Boundary-Layer Meteorol

View full text Add to dashboard Cite

show abstract

“…This is quite plausible, since momentum must be subject to turbulent mixing in the same manner as potential temperature, although the momentum is not strictly a conservative property of the air. Moreover, there is observational evidence to support the assumption (Browning et al, 1973). There is usually an inversion in the vertical temperature gradient at the top of a well-mixed boundary layer.…”

Section: Introductionmentioning

confidence: 78%

Modelling the height, temperature and relative humidity of a well-mixed planetary boundary layer over a water surface

Økland

1983

Boundary-Layer Meteorol

View full text Add to dashboard Cite

A vertically integrated model of a developing boundary layer over a wet surface is presented, and the expected change in the relative humidity is discussed. For the case of cold air moving over a water surface of constant temperature, analytical solutions of the model equations are obtained, giving the height, temperature and relative humidity of the boundary layer as functions of the distance travelled by the air column. The relation to the problem of sea smoke is discussed.

show abstract

“…Layers are commonly observed in the lowest 4 km of the atmosphere with wind profilers, radars and acoustic sounders (Browning et al, 1973;Gossard and Strauch, 1983;Luce et al, 1995;Anderson, 2003). Multiple layering has also been detected, but only when several thin stable layers separate larger regions of weaker stability associated with turbulence generated by dynamical instability (James, 1980).…”

Section: Observations Of Multiple Stable Layersmentioning

confidence: 99%

Observations of the development of convection through a series of stable layers during the Convective Storm Initiation Project

Bennett

Blyth

Browning

et al. 2008

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

This article describes the development of convection through a series of stable layers on 20 July 2004 during the pilot project of the Convective Storm Initiation Project (CSIP). Convective clouds developed in south central England as a result of diurnal heating. They formed near the south coast and grew gradually as they moved northwards, eventually producing light precipitation. Several stable layers and associated dry layers (or lids) were observed by sequential radiosondes launched every two hours. Most of these lids were also detected by the Chilbolton L-band radar and with a wind profiler as prominent layers of Bragg echo. One particular lid at 820 mb (1.7 km) inhibited the early development of the convection for about an hour, delaying the production of precipitation. The uppermost lid at 650 mb stopped all convection from intensifying in the CSIP domain. Estimates of the growth of convection through the lids were sensitive to the values of temperature and humidity chosen to represent the ascending parcels. The development of the thermals in the boundary layer was best explained by using the surface-layer average values. Parcels would not have been sufficiently buoyant to reach the lifting condensation level (LCL) unless these values were used. However, such parcels in the absence of mixing would then have been too buoyant to be capped by the main lid at 1.7 km, as was observed by the radars. In fact the development of the cumulus clouds above the LCL is best represented by using 950-1000-mb average thermodynamic values. The results highlight the importance of predicting the altitude, strength and persistence of such lids in order to forecast the intensity, location and timing of convective precipitation more accurately.

show abstract

The structure of an inversion above a convective boundary layer as observed using high-power pulsed doppler radar

Cited by 40 publications

References 16 publications

Observation of lake breeze penetration and subsequent development of the thermal internal boundary layer for the Nanticoke II Shoreline Diffusion Experiment

Observation of lake breeze penetration and subsequent development of the thermal internal boundary layer for the Nanticoke II Shoreline Diffusion Experiment

Modelling the height, temperature and relative humidity of a well-mixed planetary boundary layer over a water surface

Observations of the development of convection through a series of stable layers during the Convective Storm Initiation Project

Contact Info

Product

Resources

About