Flux Footprint Climatology Estimated by Three Analytical Models over a Subtropical Coniferous Plantation in Southeast China
Zhang, H; Wen, XF
2015
Source PublicationJOURNAL OF METEOROLOGICAL RESEARCH
ISSN2095-6037
Volume29Issue:4Pages:654-666
AbstractSpatial heterogeneity poses a major challenge for the appropriate interpretation of eddy covariance data. The quantification of footprint climatology is fundamental to improving our understanding of carbon budgets, assessing the quality of eddy covariance data, and upscaling the representativeness of a tower flux to regional or global scales. In this study, we elucidated the seasonal variation of flux footprint climatologies and the major factors that influence them using the analytical FSAM (Flux Source Area Model), KM (Kormann and Meixner, 2001), and H (Hsieh et al., 2000) models based on eddy covariance measurements at two and three times the canopy height at the Qianyanzhou site of ChinaFLUX in 2003. The differences in footprints among the three models resulted from different underlying theories used to construct the models. A comparison demonstrated that atmospheric stability was the main factor leading to differences among the three models. In neutral and stable conditions, the KM and FSAM values agreed with each other, but they were both lower than the H values. In unstable conditions, the agreement among the three models for rough surfaces was better than that for smooth surfaces, and the models showed greater agreement for a low measurement height than for a high measurement height. The seasonal flux footprint climatologies were asymmetrically distributed around the tower and corresponded well to the prevailing wind direction, which was north-northwest in winter and south-southeast in summer. The average sizes of the 90% flux footprint climatologies were 0.36-0.74 and 1.5-3.2 km(2) at altitudes of two and three times the canopy height, respectively. The average sizes were ranked by season as follows: spring > summer > winter > autumn. The footprint climatology depended more on atmospheric stability on daily scale than on seasonal scale, and it increased with the increasing standard deviation of the lateral wind fluctuations.
SubtypeJournal
Keywordeddy covariance flux footprint flux footprint climatology model comparison
Subject AreaMeteorology & Atmospheric Sciences
WOS Subject ExtendedMeteorology & Atmospheric Sciences
WOS KeywordEDDY-COVARIANCE MEASUREMENTS ; SEASONAL DROUGHT ; CARBON-DIOXIDE ; SCALAR FLUXES ; ECOSYSTEM ; EVAPOTRANSPIRATION ; SITES ; EXCHANGE ; NETWORK ; LAYER
Indexed BySCI
Language英语
WOS IDWOS:000361481500009
PublisherSPRINGER HEIDELBERG
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44379
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zhang, H,Wen, XF. Flux Footprint Climatology Estimated by Three Analytical Models over a Subtropical Coniferous Plantation in Southeast China[J]. JOURNAL OF METEOROLOGICAL RESEARCH,2015,29(4):654-666.
APA Zhang, H,&Wen, XF.(2015).Flux Footprint Climatology Estimated by Three Analytical Models over a Subtropical Coniferous Plantation in Southeast China.JOURNAL OF METEOROLOGICAL RESEARCH,29(4),654-666.
MLA Zhang, H,et al."Flux Footprint Climatology Estimated by Three Analytical Models over a Subtropical Coniferous Plantation in Southeast China".JOURNAL OF METEOROLOGICAL RESEARCH 29.4(2015):654-666.
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