@article{fdi:010063940,
  title = {{T}urbulence characteristics in the atmospheric surface layer for different wind regimes over the tropical {Z}ongo glacier ({B}olivia,16 degrees {S})},
  author = {{L}itt, {M}. and {S}icart, {J}ean-{E}mmanuel and {H}elgason, {W}. {D}. and {W}agnon, {P}atrick},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigate properties of the turbulent flow and sensible heat fluxes in the atmospheric surface layer of the high elevation tropical {Z}ongo glacier ( m a.s.l., {S}, {B}olivia) from data collected in the dry season from {J}uly to {A}ugust 2007, with an eddy-covariance system and a 6-m mast for wind speed and temperature profiles. {F}ocus is on the predominant downslope wind regime. {A} low-level wind-speed maximum, around a height of m, is detected in low wind conditions (37 % of the time). {I}n strong wind conditions (39 % of the time), no wind-speed maximum is detected. {S}tatistical and spectral analyses reveal low frequency oscillations of the horizontal wind speed that increase vertical mixing. {I}n strong winds, wavelet analysis shows that coherent structures systematically enhance the turbulent sensible heat fluxes, accounting for 44-52 % of the flux. {I}n contrast, in low wind conditions, the katabatic flow is perturbed by its slow oscillations or meandering motions, inducing erratic turbulent sensible heat fluxes. {T}hese motions account for 37-43 % of the flux. {O}n tropical glaciers, the commonly used bulk aerodynamic profile method underestimates the eddy-covariance-based flux, probably because it does not account for low frequency disturbances that influence the surface flow in both wind regimes.},
  keywords = {{C}oherent structures ; {E}ddy covariance ; {E}nergy balance ; {K}atabatic wind ; {T}ropical glaciers ; {BOLIVIE}},
  booktitle = {},
  journal = {{B}oundary-{L}ayer {M}eteorology},
  volume = {154},
  numero = {3},
  pages = {471--495},
  ISSN = {0006-8314},
  year = {2015},
  DOI = {10.1007/s10546-014-9975-6},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063940},
}