Boundary-Layer Meteorology

, Volume 22, Issue 1, pp 21–48

Observations in the nocturnal boundary layer

  • J. R. Garratt

DOI: 10.1007/BF00128054

Cite this article as:
Garratt, J.R. Boundary-Layer Meteorol (1982) 22: 21. doi:10.1007/BF00128054


Low-latitude observations of the stably-stratified planetary boundary layer (SBL) above rough terrain are compared to observations of the mid-latitude SBL mainly through the depth h and its dependence upon surface fluxes. This involves the quantity h/L and the similarity prediction h = γ(u*L/f)1/2.

Mid-latitude observations are consistent with model calculations for nighttime-averaged quantities and their deviations, as functions of latitude and surface roughness, from the equilibrium values found at large t. The above applies to horizontally-homogeneous terrain.

Low-latitude observations of % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGafq4SdCMbae% baaaa!37AB!\[\bar \gamma \] and h/L are significantly smaller than mid-latitude values, apparently the result of katabatic flows at the site and not the differences in latitude. This is consistent with model calculations for non-zero slope terrain.

Copyright information

© D. Reidel Publishing Co 1982

Authors and Affiliations

  • J. R. Garratt
    • 1
  1. 1.National Center for Atmospheric ResearchBoulderUSA
  2. 2.Division of Atmospheric PhysicsCSIROMordiallacAustralia

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