Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/5178
標題: 利用陀螺儀於非靜止平台上校正通量之方法
The corrected method of flux using Gyro at non-static platform
作者: 謝祥雲
Hsieh, Hsiang-Yun
關鍵字: Gyro
陀螺儀
eddy covariance system
coordinate rotation
mobile platform
flux correction
渦流協變性系統
座標旋轉
晃動平台
通量校正
出版社: 環境工程學系所
引用: Aubinet, M., A. Grelle, A. Ibrom, Ü. Rannik, J. Moncrieff, T. Foken, A.S. Kowalski, P.H. Martin, P. Berbigier, Ch. Bernhofer, R. Clement, J. Elbers, A. Granier, T. Grünwald, K. Morgenstern, K. Pilegaard, C. Rebmann, W. Snijders, R. Valentini, and T. Vesala, “Estimates of the annual net carbon and water exchange of forests:the EUROFLUX methodology,” Advances in Ecological Research, vol. 30, pp. 114-175 (2000). Baldocchi, D., E. Falge, L. Gu, R. Olson, D. Hollinger, S. Running, P. Anthoni, Ch. Bernhofer, K. Davis, R. Evans, J. Fuentes, A. Goldstein, G. Katul, B. Law, X. Lee, Y. Malhi, T. Meyers, W. Munger, W. Oechel, K.T. Paw U, K. Pilegaard, H.P. Schmid, R. Valentini, S. Verma, T. Vesala, K. Wilson, and S. Wofsyn, ”FLUXNET:a new tool to study the temporal and spatial variability of ecosystem-scale carbon dioxide, water vapor, and energy flux densities,” Bulletin of the American Meteorological Society, vol. 82, pp. 2415-2434 (2001). Brut A., D. Legain, P. Durand, P. Laville, “A Relaxed Eddy Accumulator for Surface Flux Measurements on Ground-Based Platforms and Aboard Research Vessels,” American Meteorological Society, (1998) Edson J.B., A.A. Hinton, and K.E. Prada, J.E. Hare, and C.W. Fairall, “Direct Covariance Flux from Mobile Platform at Sea,” Atmospheric and Oceanic Technology, 15(2) (1998) Fairall C.W., J.E. Hare, and A.A. Grachev, “Turbulent Surface Flux Measurements from Nauru99,” In Proceedings of the Eleventh Atmospheric Radiation Measurements (ARM) Science Team Meeting, U.S. Department of Energy, Washington, D.C. (2001) Fujitani T., “Direct measurements of turbulent fluxes over the sea during Amtex,” Meteorology and Geophysics, 32(3):119-134, September (1981). Fujitani T., “Method of turbulent flux measurement on a ship by using a stable platform system,” Meteorology and Geophysics, 36:157-170, (1985). Gao-Zhiqiu, Lingen-Bian, and Xiuji-Zhou, “Measurements of turbulent transfer in the near-surface layer over a rice paddy in China,” Geophysical Research, vol. 108, No.D13,4387(2003) Grelle, A., and A. Lindroth, “Eddy-correlation system for long-term monitoring of fluxes of heat, water vapor and CO2,” Global Change Biol., vol. 2, pp. 297-307 (1996). Kaimal, J.C., and J.E. Gaynor, “Another Look at Sonic Thermometry,” Boundary-Layer Meteorol., vol. 56, pp. 401-410 (1991). Kaimal, J.C., and J.J. Finnigan, “Atmospheric boundary layer flows:Their structure and measurement,” Oxford university press, 289pp (1994). Lee, X., “On micrometeorological observations of surface-air exchange over tall vegetation,” Agricultural and Forest Meteorology, vol. 91, pp. 39-49 (1998). Li-7500 CO2/H2O Analyzer Introduction Manual, Environmental Version, Li-COR Inc.(2004) McMillen, R.T., “An eddy correlation technique with extended applicability to non-simple terrain,” Boundary-Layer Meteorology, vol. 43, pp. 231-245 (1988). Meek, D.W., and J.H. Prueger, “Solutions for three regression problems commonly found in meteorological data analysis,” American Meteorological Society, pp. 141-145 (1998). Msssman, W.J., and X. Lee, “Eddy covariance flux correction and uncertainties in long-term stydies of carbon and energy exchanges,” Agricultural and Forest Meteorology, vol. 113, pp. 121-144 (2002). Tsai J-L, B-J Tsuang, “Aerodynamic roughness over an urban area and over two farmlands in a populated area as determined by wind profiles and surface energy flux measurements,” Agricultural and Forest Meteorology, vol. 132, pp. 154-170 (2005). Tsuang, B-J, J-L Tsai, M-D Lin, and C-L Chen, “Determining aerodynamic roughness using tethersonde and heat flux measurements in an urban area over a complex terrain,” Atmospheric Environment, vol. 37, pp. 1993-2003 (2003). Webb, E.K., G.I. Pearman, and R. Leuning, “Correction of flux measurements for density effects due to heat and water vapor transfer,” Quart. J. R. Met. Soc., vol. 106, pp. 67-90 (1980). Wilczak, J.M., S.P. Oncley, and S.A. Stage, “Sonic anemometer tilt correction algorithms,” Boundary-Layer Meteorology, vol. 99, pp. 127-150 (2001) Wilson, K.B., A. Goldstein, E. Falge, M. Aubinet, D. Baldocchi, P. Berbigier, C. Bernhofer, R. Ceulemans, H. Dolman, C. Field, A. Grelle, A. Ibrom, B.E. Law, A. Kowalski, T. Meyers, J. Moncrieff, R. Monson, W. Oechel, J. Tenhunen, R. Valentini, and S. Verma, “Energy balance closure at FLUXNET sites,” Agricultural and Forest Meteorology, vol. 113, pp. 223-243 (2002). Zhang, S., C. Qiu, and W. Zhang, “Estimating heat fluxes by merging profile formulae and the energy budget with a variational technique,” Advances in Atmospheric Science, vol. 21, pp. 627-636 (2004). 盧伯勝、莊秉潔,「渦流協變性系統量測紊流熱通量之研究」,碩士論文,國立中興大學環境工程研究所,台中 (2005)。 朱佳仁,「環境流體力學」,(2003)。
摘要: 要在海洋上量測到準確的大氣通量,需要克服的因子甚多,包括:海水波浪所造成的受壓項、船體所引起之晃動及搖動的變形量及其他海洋環境因素所造成的影響等等。 本研究利用可測得pitch、roll、yaw三軸角度向量之陀螺儀搭配二套渦流協變性系統在台中縣霧峰農業試驗所 (24°01´ N ,120°41´ E)之大豆田區進行模擬海洋平台晃動試驗。實驗設計為三個不同的晃動條件試驗下測量大氣變異通量(靜止vs 0rpm、靜止vs 5rpm、靜止 vs 10rpm;2005/12/27~2006/1/17、2006/1/18~1/20、2006/1/20~1/24)並利用最小平方法、均方根誤差、絕對平均誤差及標準偏差等統計方法對經過二維座標旋轉、三維座標旋轉及Edson(1998)所提出之海洋平台修正方法進行比對。結果顯示,經由海洋平台修正方法最為適當,其次是二維座標旋轉。雖然三維座標旋轉較不理想,但仍然比未校正前表現還好,故原始資料都應經過校正。
There are lots of factors needed to be overcome when measuring “accurate” flux at sea, including wave stress reduced by sea-spray、flow distortion cause of the mobile vessel and other environmental contaminations. This study is trying to simulate mobile platform at sea which using Gyro that could measure angle vectors(pitch, roll, yaw)along three axis and setup two eddy covariance systems on soybean field of Wu-Feng Agricultural Research Institute, Taichung, Taiwan (24°01´ N ,120°41´ E).There are three different experimental designs to measure covariance flux of atmosphere(still vs 0 rom、still vs 5rpm and still vs 10 rpm;between 27 Dec. 2005 and 17 Jan. 2006, between 18 Jan. 2006 and 20 Jan 2006, between 20 Jan. 2006 and 24 Jan. 2006)and then use statistics methods of OLS, RMSE, MAE, STDEV to compare three different correction methods of two-axis rotation correction、three-axis rotation correction and sea correction method published by Edson(1998).The results showing that the sea correction method is the most appropriate method, secondly is two-axis rotation correction. Although three-axis rotation correction is relatively unsatisfactory, it is still better than uncorrected data. Therefore, the raw data is needed to be corrected certainly.
URI: http://hdl.handle.net/11455/5178
其他識別: U0005-1907200617454000
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-1907200617454000
Appears in Collections:環境工程學系所

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.