Growing season total gaseous mercury (TGM) flux measurements over an Acer rubrum L. stand
Growing season total gaseous mercury (TGM) flux measurements over an Acer rubrum L. stand
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DOI：
10.1016/j.atmosenv.2009.08.008
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发表时间：
2009-12-01
影响因子：
5
通讯作者：
Miller, David R.
中科院分区：
文献类型：
--
作者：
Bash, Jesse O.;Miller, David R.
在2004年生长季和2005年生长季的下半年，在主要由红枫（Acer rubrum L）组成的落叶林中进行了总气态汞（TGM）通量测量的松弛涡积（REA）测量。通量估计值的幅度范围内的其他微气象汞通量发表的结果采取以上高大的树冠和大于通量室的估计。在生长季节，通量的大小和方向不是静止的。有一个显着的趋势（p < 0.001），从净沉积的TGM在初夏到净逃避在夏末和初秋之前完全衰老。在不稳定的白天条件下，生长季节大气-冠层总汞（TGM）补偿点估计为背景环境浓度（1.41 ng m（-3））。季节性净TGM通量的趋势表明，需要进行长期的干沉降监测，以准确估计森林生态系统的汞负荷。爱思唯尔有限公司出版
Relaxed eddy accumulation (REA) measurements of the total gaseous mercury (TGM) flux measurements were taken over a deciduous forest predominantly composed of Red Maple (Acer rubrum L) during the growing season of 2004 and the second half of the growing season of 2005. The magnitudes of the flux estimates were in the range of published results from other micrometeorological mercury fluxes taken above a tall canopy and larger than estimates from flux chambers. The magnitude and direction of the flux were not static during the growing season. There was a significant trend (p < 0.001), from net deposition of TGM in early summer to net evasion in the late summer and early fall before complete senescence. A growing season atmosphere-canopy total mercury (TGM) compensation point during unstable daytime conditions was estimated at background ambient concentrations (1.41 ng m(-3)). The trend in the seasonal net TGM flux indicates that long term dry deposition monitoring is needed to accurately estimate mercury loading over a forest ecosystem. Published by Elsevier Ltd.