지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
We have examined the random error of eddy covariance (EC) measurements on the basis of two-tower approach during daytime. Two EC towers were placed on the grassland with different vegetation density near Gumi-weir. We calculated the random error using three different methods. The first method (M1) is two-tower method suggested by Hollinger and Richardson (2005) where random error is based on differences between simultaneous flux measurements from two towers in very similar environmental conditions. The second one (M2) is suggested by Kessomkiat et al. (2013), which is extended procedure to estimate random error of EC data for two towers in more heterogeneous environmental conditions. They removed systematic flux difference due to the energy balance deficit and evaporative fraction difference between two sites before determining the random error of fluxes using M1 method. Here, we introduce the third method (M3) where we additionally removed systematic flux difference due to available energy difference between two sites. Compared to M1 and M2 methods, application of M3 method results in more symmetric random error distribution. The magnitude of estimated random error is smallest when using M3 method because application of M3 method results in the least systematic flux difference between two sites among three methods. An empirical formula of random error is developed as a function of flux magnitude, wind speed and measurement height for use in single tower sites near Nakdong River. This study suggests that correcting available energy difference between two sites is also required for calculating the random error of EC data from two towers at heterogeneous site where vegetation density is low.
목차
Abstract
1. 서론
2. 자료 및 분석 방법
3. 결과
4. 결론 및 요약
REFERENCES
참고문헌 (23)
참고문헌 신청
[단행본] - Aubinet, M. / 2012 / Eddy covari ance. A practical guide to measurement and data analysis / Springer : 438 ~
[학술지(정기간행물)] - Seon-Young Choi / 2015 / Analysis of Local Wind Induced by Surface Heterogeneity and Sloping Terrain Near Nakdong River / 한국기상학회지 51 (3) : 249 ~ 257
[학술지(정기간행물)] - Finkelstein, P. L. / 2001 / Sampling error in eddy correlation flux measurements / J. Gephys. Res 106 : 3503 ~ 3509
[학술지(정기간행물)] - Foken, T. / 2008 / The energy balance closure problem: an overview / Ecol. Appl 18 : 1351 ~ 1367
[학술지(정기간행물)] - Hollinger, D. Y. / 2005 / Uncertainty in eddy covariance measurements and its application to physiological models / Tree Physio 25 : 873 ~ 885
[학술지(정기간행물)] - Seon-Young Choi / 2015 / Analysis of Local Wind Induced by Surface Heterogeneity and Sloping Terrain Near Nakdong River / 한국기상학회지 51 (3) : 249 ~ 257
[학술지(정기간행물)] - Finkelstein, P. L. / 2001 / Sampling error in eddy correlation flux measurements / J. Gephys. Res 106 : 3503 ~ 3509
[학술지(정기간행물)] - Foken, T. / 2008 / The energy balance closure problem: an overview / Ecol. Appl 18 : 1351 ~ 1367
[학술지(정기간행물)] - Hollinger, D. Y. / 2005 / Uncertainty in eddy covariance measurements and its application to physiological models / Tree Physio 25 : 873 ~ 885
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UCI(KEPA) : I410-ECN-0101-2017-453-001381948