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DOI	10.1029/2005WR003954
	Application of the band-pass covariance technique to portable flux measurements over the Tibetan Plateau
	Asanuma, J; Ishikawa, H; Tamagawa, I; Ma, YM; Hayashi, T; Qi, YQ; Wang, JM
发表日期	2005
ISSN	0043-1397
EISSN	1944-7973
卷号	41 期号:9
英文摘要	Two versions of the band- pass covariance technique were applied to the turbulence data collected during daytime with a simple and portable measurement system over the sparse grasslands of the Tibetan Plateau. The coherency spectra between the temperature and the specific humidity, which is a spectral counterpart of the correlation coefficient, were used as a dynamic indicator of the energy- containing ranges as well as that of the sensor attenuation at higher frequencies. The comparison with independent measurements by the eddy covariance method showed that the original version of the band- pass covariance technique occasionally fails. This indicates breakdowns of the similarity between the temperature and the water vapor, especially in the lowest- frequency regions. On the other hand, the latent heat flux computed with the advanced version exhibited adequate agreement with the eddy covariance method. This paper demonstrates that the current implementation of the advanced version with the embedded self-calibration procedure provides a robust method of frequency extrapolation in scalar flux measurements under unstable conditions.
关键词	SURFACE-ENERGY BUDGET FREQUENCY-RESPONSE CORRECTIONS WATER-VAPOR LONG-TERM SPECTRAL CHARACTERISTICS DIFFERENTIAL DIFFUSION TURBULENCE SPECTRA LAYER SIMILARITY TEMPERATURE
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS记录号	WOS:000231829800001
来源期刊	WATER RESOURCES RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257390
推荐引用方式 GB/T 7714	Asanuma, J,Ishikawa, H,Tamagawa, I,et al. Application of the band-pass covariance technique to portable flux measurements over the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2005,41(9).
APA	Asanuma, J.,Ishikawa, H.,Tamagawa, I.,Ma, YM.,Hayashi, T.,...&Wang, JM.(2005).Application of the band-pass covariance technique to portable flux measurements over the Tibetan Plateau.WATER RESOURCES RESEARCH,41(9).
MLA	Asanuma, J,et al."Application of the band-pass covariance technique to portable flux measurements over the Tibetan Plateau".WATER RESOURCES RESEARCH 41.9(2005).