Large aperture scintillometer intercomparison study

被引：69

作者：

Kleissl, J. ^{[1
]}

Gomez, J. ^{[1
]}

Hong, S. -H. ^{[1
]}

Hendrickx, J. M. H. ^{[1
]}

Rahn, T. ^{[2
]}

Defoor, W. L. ^{[1
]}

机构：

[1] Dept Earth & Environm Sci, Socorro, NM USA

[2] Los Alamos Natl Lab, Los Alamos, NM USA

来源：

BOUNDARY-LAYER METEOROLOGY | 2008年 / 128卷 / 01期

基金：

美国国家科学基金会;

关键词：

instrument intercomparison; large aperture scintillometer; sensible heat flux;

D O I：

10.1007/s10546-008-9274-1

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Two field studies with six large aperture scintillometers (LASs) were performed using horizontal and slant paths. The accuracy of this novel and increasingly popular technique for measuring sensible heat fluxes was quantified by comparing measurements from different instruments over nearly identical transects. Random errors in LAS measurements were small, since correlation coefficients between adjacent measurements were greater than 0.995. However, for an ideal set-up differences in linear regression slopes of up to 21% were observed with typical inter-instrument differences of 6%. Differences of 10% are typical in more realistic measurement scenarios over homogeneous natural vegetation and different transect heights and locations. Inaccuracies in the optics, which affect the effective aperture diameter, are the most likely explanation for the observed differences.

引用

页码：133 / 150

页数：18

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