Characteristics of the marine boundary layers during two Lagrangian measurement periods. 2. Turbulence structure

Qing Wang, Donald H. Lenschow, Linlin Pan, Richard D. Schillawski, Gregory L. Kok, Andre S H Prévot, Krista Laursen, Lynn M. Russell, Alan R. Bandy, Donald C. Thornton, Karsten Suhre

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Characteristics of turbulence mixing in remote marine boundary layers are analyzed using aircraft measurements from six flights during the two intensive Lagrangian measurement periods of ACE 1 (the southern hemisphere Aerosol Characterization Experiment). The six cases studied here presented a variety of boundary layer conditions in the region south of Tasmania, Australia. Our study indicated that (1) Lagrangian A (LA) had stronger turbulence mixing and entrainment compared to Lagrangian B (LB) due to greater shear generation of turbulence kinetic energy (TKE), (2) strong mesoscale variation in boundary layer turbulence and thus turbulence mixing existed in the ACE 1 region during LB due to variations in sea surface temperature (SST), (3) stable thermal stratification in the boundary layer was found during the last flight of each Lagrangian, consequently, TKE decreased rapidly with height resulting in small or near-zero entrainment rate in spite of strong shear forcing at the surface and in the boundary layer; and (4) the buffer layer, which lies above the boundary layer and below the main inversion, had weak and intermittent turbulence mostly associated with cloud bands and cumulus. Evidence of entrainment was found in the buffer layer. However, it is difficult by flux measurements due to the weak and intermittent nature of the turbulence field.

Original languageEnglish
JournalJournal of Geophysical Research Atmospheres
Volume104
Issue number17
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

boundary layers
Boundary layers
Turbulence
boundary layer
turbulence
entrainment
ACE 1
Buffer layers
Kinetic energy
kinetic energy
buffers
flight
Tasmania
shear
Thermal stratification
sea surface temperature
airborne survey
Southern Hemisphere
flux measurement
cumulus

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Characteristics of the marine boundary layers during two Lagrangian measurement periods. 2. Turbulence structure. / Wang, Qing; Lenschow, Donald H.; Pan, Linlin; Schillawski, Richard D.; Kok, Gregory L.; Prévot, Andre S H; Laursen, Krista; Russell, Lynn M.; Bandy, Alan R.; Thornton, Donald C.; Suhre, Karsten.

In: Journal of Geophysical Research Atmospheres, Vol. 104, No. 17, 1999.

Research output: Contribution to journalArticle

Wang, Q, Lenschow, DH, Pan, L, Schillawski, RD, Kok, GL, Prévot, ASH, Laursen, K, Russell, LM, Bandy, AR, Thornton, DC & Suhre, K 1999, 'Characteristics of the marine boundary layers during two Lagrangian measurement periods. 2. Turbulence structure', Journal of Geophysical Research Atmospheres, vol. 104, no. 17.
Wang, Qing ; Lenschow, Donald H. ; Pan, Linlin ; Schillawski, Richard D. ; Kok, Gregory L. ; Prévot, Andre S H ; Laursen, Krista ; Russell, Lynn M. ; Bandy, Alan R. ; Thornton, Donald C. ; Suhre, Karsten. / Characteristics of the marine boundary layers during two Lagrangian measurement periods. 2. Turbulence structure. In: Journal of Geophysical Research Atmospheres. 1999 ; Vol. 104, No. 17.
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AU - Prévot, Andre S H

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AU - Bandy, Alan R.

AU - Thornton, Donald C.

AU - Suhre, Karsten

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