Relationship of atmospheric boundary layer depth with thermodynamic processes at the land surface in arid regions of China

Zhang, Qiang; Zhang, Jie; Qiao, Juan; Wang, Sheng

doi:10.1007/s11430-011-4207-0

Cited by 58 publications

(45 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…By comparison with deserts and other arid regions that also have a high ABL [51]–[53], the elevation of the Tibetan Plateau makes it easy to demonstrate how transport processes in the UTLS over the plateau affect the ABL. A close surface-troposphere-stratospheric coupled system may exist over the plateau.…”

Section: Resultsmentioning

confidence: 99%

The Deep Atmospheric Boundary Layer and Its Significance to the Stratosphere and Troposphere Exchange over the Tibetan Plateau

Chen

Añel

et al. 2013

PLoS ONE

View full text Add to dashboard Cite

In this study the depth of the atmospheric boundary layer (ABL) over the Tibetan Plateau was measured during a regional radiosonde observation campaign in 2008 and found to be deeper than indicated by previously measurements. Results indicate that during fair weather conditions on winter days, the top of the mixed layers can be up to 5 km above the ground (9.4 km above sea level). Measurements also show that the depth of the ABL is quite distinct for three different periods (winter, monsoon-onset, and monsoon seasons). Turbulence at the top of a deep mixing layer can rise up to the upper troposphere. As a consequence, as confirmed by trajectory analysis, interaction occurs between deep ABLs and the low tropopause during winter over the Tibetan Plateau.

show abstract

Section: Resultsmentioning

confidence: 99%

The Deep Atmospheric Boundary Layer and Its Significance to the Stratosphere and Troposphere Exchange over the Tibetan Plateau

Chen

Añel

et al. 2013

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…Previous studies evaluated the accuracy of GTS1 observations [Tao et al, 2006;Bian et al, 2011] and indicated that the GTS1 radiosondes provide temperature profiles as accurate as the Vaisala RS80 profiles in the troposphere. The fine-resolution L-band radiosonde data have been used to study boundary layer features across China [Zhang et al, 2008;Yang et al, 2011;Zhang et al, 2011;Du et al, 2013;Guo et al, 2016].…”

Section: Journal Of Geophysical Research: Atmospheresmentioning

confidence: 99%

Evaluation of retrieval methods of daytime convective boundary layer height based on lidar data

Yang

et al. 2017

JGR Atmospheres

View full text Add to dashboard Cite

The atmospheric boundary layer height is a basic parameter in describing the structure of the lower atmosphere. Because of their high temporal resolution, ground‐based lidar data are widely used to determine the daytime convective boundary layer height (CBLH), but the currently available retrieval methods have their advantages and drawbacks. In this paper, four methods of retrieving the CBLH (i.e., the gradient method, the idealized backscatter method, and two forms of the wavelet covariance transform method) from lidar normalized relative backscatter are evaluated, using two artificial cases (an idealized profile and a case similar to real profile), to test their stability and accuracy. The results show that the gradient method is suitable for high signal‐to‐noise ratio conditions. The idealized backscatter method is less sensitive to the first estimate of the CBLH; however, it is computationally expensive. The results obtained from the two forms of the wavelet covariance transform method are influenced by the selection of the initial input value of the wavelet amplitude. Further sensitivity analysis using real profiles under different orders of magnitude of background counts show that when different initial input values are set, the idealized backscatter method always obtains consistent CBLH. For two wavelet methods, the different CBLH are always obtained with the increase in the wavelet amplitude when noise is significant. Finally, the CBLHs as measured by three lidar‐based methods are evaluated by as measured from L‐band soundings. The boundary layer heights from two instruments coincide with ±200 m in most situations.

show abstract

“…These studies have laid a solid foundation for a detailed understanding of the weather and climate in this region. In China, Zhang et al, , Zhang & Wang, utilized observations over Dunhuang to study the structure of the ABL and land surface processes. They found that the height of the ABL in Dunhuang can exceed 4,000 m in the summer when the sky is clear, which is actually the result of strong solar radiation and an extremely dry surface.…”

Section: Introductionmentioning

confidence: 99%

Features of the Deep Atmospheric Boundary Layer Over the Taklimakan Desert in the Summertime and its Influence on Regional Circulation

Wang

et al. 2019

JGR Atmospheres

View full text Add to dashboard Cite

To investigate the features of the extremely deep atmospheric boundary layer (ABL) over the Taklimakan Desert (TD) and its influence, this paper utilizes sounding data obtained from a month‐long intensive field campaign carried out in July 2016 over the TD to study the structure of the 5,000‐m‐depth ABL over the desert and the features of its temporal and spatial variations. The differences and causes of the regional circulation are analyzed for both the deep ABL and shallow ABL over the TD. We show that (1) deep ABLs occurred frequently in the hinterland and the surrounding areas of the TD in July 2016. The numbers of days when the ABL height reached 4,000 m at Tazhong, Minfeng, Korla, Ruoqiang, and Kashgar are 8, 9, 5, 4, and 2, respectively, and the numbers of days when the ABL height exceeded 3,000 m at the above locations are 20, 22, 13, 15, and 5, respectively. (2) The ABL height reached 5,000 m over the TD on 1 July 2016. The diurnal variation of the ABL appears in such a manner that it develops and intensifies gradually from southeast to northwest direction. The middle of the desert witnesses large values of ABL heights. The ABL height in the desert is obviously higher than those in the surrounding oases and in the northern part of Xinjiang. (3) On 1 July 2016, a deep ABL process is accompanied by a strong easterly low‐level jet on the following night, which triggers significant air accumulation and dynamic convergence in the lower‐level atmosphere over the middle and west of the TD, thus intensifying the divergence and anticyclonic circulation at the 500‐hPa middle‐level atmosphere. (4) The influence of the deep ABL process on 1 July on the regional circulation mainly occurs below 400 hPa, while its influence is relatively small above 400 hPa. This type of influence is also regional, as it mainly occurs over the TD and its surrounding areas. This study enriches the understanding of the deep ABL process over the TD and its influence.

show abstract

Relationship of atmospheric boundary layer depth with thermodynamic processes at the land surface in arid regions of China

Cited by 58 publications

References 9 publications

The Deep Atmospheric Boundary Layer and Its Significance to the Stratosphere and Troposphere Exchange over the Tibetan Plateau

The Deep Atmospheric Boundary Layer and Its Significance to the Stratosphere and Troposphere Exchange over the Tibetan Plateau

Evaluation of retrieval methods of daytime convective boundary layer height based on lidar data

Features of the Deep Atmospheric Boundary Layer Over the Taklimakan Desert in the Summertime and its Influence on Regional Circulation

Contact Info

Product

Resources

About