OBSERVATIONAL ANALYSIS ON WINTER TURBULENCE FEATURE OVER SHRUB ECOSYSTEM IN ZENGCHENG HILLY REGION
LIU Hai-kun
HUANG Jian
WANG Xin
ZHANG Su-ping
Abstract：A brief introduction of a Zengcheng land-surface processes observation tower is given,including the equipment and geographical environment.Based on the turbulence data collected from December 2014 to February 2015 the basic micrometeorological characteristics such as wind direction,atmospheric stability,turbulence intensity etc.in the near-surface layer were investigated.The results show that:(1) The observation tower is under small northerly wind condition in winter with high amplitude of temperature variation;(2) The distribution of atmospheric stability is concentrated in ± 0.5 and mainly near 0;Turbulence is active when the wind velocity is lower than 1 m/s,the intensity of turbulence will decrease with the increase of wind speed until it becomes a constant;(3) The normalized standard deviation of wind velocity components generally meet the 1/3 power low with Z/L and has the synchronous changes with |Z/L|,when |Z/L |→0,δu/u*、δv/u*、δw/u* tend to be constant;(4) Sensible heat flux is the leading energy consumption of in winter,especially in sunny days;the maximum average diurnal absorption of CO2 is 0.236 mg/(m2· s).
Keywords：Zengchengshrub ecosystemturbulent charactersdiurnal variationwinter
Publication Date：2017-09-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 706-715 )