Observations Of The Morning Transition Of The Convective Boundary Layer

被引:0
|
作者
Wayne M. Angevine
Henk Klein Baltink
Fred C. Bosveld
机构
[1] University of Colorado,CIRES
[2] and NOAA Aeronomy Laboratory,undefined
[3] Royal Netherlands Meteorological Institute (KNMI),undefined
来源
Boundary-Layer Meteorology | 2001年 / 101卷
关键词
Cabauw tower; Convective boundary layer; Flatland Atmospheric Observatory; Morning transition; Wind profiler;
D O I
暂无
中图分类号
学科分类号
摘要
The morning transition between the stable nocturnal situation and the daytime convective boundary layer (CBL) is of interest both for basic understanding and for initializing prognostic models. While the morning growth phase of the CBL has been studied in detail, relatively little has been published on the transition itself. In this paper, conventional observations of surface temperature, humidity, and turbulent fluxes,and data from a meteorological tower, are combined with measurements of the onset of convection by boundary-layer wind profilers to explore the timing and behaviour of the transition period. The transition is defined here as the period between sunrise and the time at which the depth ofconvection reaches about 200 m AGL. Diagnostic relationships based on surface heat flux, the temperature difference between 2 m and 200 m, and bulk Richardson number are explored. The transition is foundto be enabled by surface heating relaxing the surface stability, while the warming of the layerbetween 2 m and 200 m is in large part due to shear-driven entrainment.
引用
收藏
页码:209 / 227
页数:18
相关论文
共 50 条
  • [1] Observations of the morning transition of the convective boundary layer
    Angevine, WM
    Baltink, HK
    Bosveld, FC
    [J]. 15TH SYMPOSIUM ON BOUNDARY LAYERS AND TURBULENCE, 2002, : 120 - 120
  • [2] Observations of the morning transition of the convective boundary layer
    Angevine, WM
    Baltink, HK
    Bosveld, FC
    [J]. BOUNDARY-LAYER METEOROLOGY, 2001, 101 (02) : 209 - 227
  • [3] Observations of the afternoon transition of the convective boundary layer
    Grimsdell, AW
    Angevine, WM
    [J]. JOURNAL OF APPLIED METEOROLOGY, 2002, 41 (01): : 3 - 11
  • [4] The morning transition of the nocturnal boundary layer
    Lapworth, A.
    [J]. BOUNDARY-LAYER METEOROLOGY, 2006, 119 (03) : 501 - 526
  • [5] The Morning Transition of the Nocturnal Boundary Layer
    A. Lapworth
    [J]. Boundary-Layer Meteorology, 2006, 119 : 501 - 526
  • [6] RAPID MORNING BOUNDARY-LAYER-TRANSITION
    LENSCHOW, DH
    STANKOV, BB
    MAHRT, L
    [J]. JOURNAL OF THE ATMOSPHERIC SCIENCES, 1979, 36 (11) : 2108 - 2124
  • [7] The Role of Shear in the Morning Transition Boundary Layer
    Beare, Robert J.
    [J]. BOUNDARY-LAYER METEOROLOGY, 2008, 129 (03) : 395 - 410
  • [8] The Role of Shear in the Morning Transition Boundary Layer
    Robert J. Beare
    [J]. Boundary-Layer Meteorology, 2008, 129 : 395 - 410
  • [9] Grey zone simulations of the morning convective boundary layer development
    Efstathiou, G. A.
    Beare, R. J.
    Osborne, S.
    Lock, A. P.
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2016, 121 (09) : 4769 - 4782
  • [10] A case study of the morning evolution of the convective boundary layer depth
    García, JA
    Cancillo, ML
    Cano, JL
    [J]. JOURNAL OF APPLIED METEOROLOGY, 2002, 41 (10): : 1053 - 1059