한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제46권2호
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  • Pages.111-122
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  • 2013
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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에디공분산 방법 기반의 플럭스 타워 순 복사에너지 검증: 설마천, 청미천 유역

Validation of Net Radiation Measured from Fluxtower Based on Eddy Covariance Method: Case Study in Seolmacheon and Cheongmicheon Watersheds

  • 변규현 (한양대학교 건설환경공학과) ;
  • 신지예 (한양대학교 건설환경공학과) ;
  • 이연길 (유량조사사업단 유사량조사실) ;
  • 최민하 (한양대학교 건설환경공학과)
  • Byun, Kyuhyun (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Shin, Jiyae (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Lee, Yeon-Kil (Hydrological Survey Center) ;
  • Choi, Minha (Department of Civil and Environmental Engineering, Hanyang University)
  • 투고 : 2012.07.14
  • 심사 : 2012.10.02
  • 발행 : 2013.02.28
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초록

최근 들어 기후변화로 인해 물과 에너지 순환에 관한 정확한 이해가 요구되고 있다. 현재 미기상학적 플럭스 타워 네트워크는 수문학적, 생태학적 분석에 있어서 주춧돌역할을 하고 있다. 하지만 플럭스 타워의 에디공분산 방법을 활용한 잠열 플럭스 측정은 여러 가정사항에 따른 시스템적 오류를 내포하고 있고 이에 따라 과소평가된 잠열 플럭스 원시자료의 보정이 필요하다. 몇몇의 보정방법 중 보엔비를 활용한 방법이 가장 유용한 방법 중 하나로서 여기에는 플럭스타워에서 측정한 순 복사에너지 및 기타 플럭스(현열, 지열) 등이 요구되며 이러한 자료에 대한 정확한 측정 및 검증이 필요하다. 본 연구에서는 설마천, 청미천 유역의 플럭스타워에서 측정된 순 복사에너지를 검증하기 위해 두 가지 형태의 이론적으로 계산된 순 복사에너지와의 비교검증을 실시하였다-(1) FAO 56 기반의 일평균 순 복사에너지 (2) Bastiaansen (1995)가 제안한 순간 순 복사에너지. 본 연구의 결과는 플럭스타워에서 측정된 순 복사에너지는 이론적으로 계산된 순 복사에너지와 상당히 비슷한 경향성을 보인다는 것을 제시했다. 또한, 측정된 순 복사에너지를 이용하여 관측된 잠열플럭스를 보엔비 보정방법에 적용시킨 결과 에너지수지에 더욱 부합하는 것을 알 수 있었다.

The necessity of clear understanding of water and energy cycles has been attracted recently due to the climate change. The micrometeorological flux tower networks play a role of cornerstone of the hydrological and ecological analyses. Although the eddy covariance techniques used for flux tower have been proven to be applicable for estimation of latent heat flux, the raw data are often underestimated and needs to be corrected. Among several methods, the Bowen ratio is recognized as the most useful method in which the net radiation and other flux data (Ground heat flux, Sensible heat flux) are used and needed to be validated. In this study, in order to validate the net radiation from flux tower in Seolmacheon and Cheongmicheon watersheds, we compare it with two version of calculated net radiation: (1) FAO 56 Daily net radiation proposed by Allen et al. (1998). (2) Instantaneous net radiation proposed by Bastiaanssen (1995). The results showed that the net radiation from the flux data had similar tendency with those calculated based on physical theory. In addition, after it was applied to Bowen ratio method, the corrected latent heat flux was considerably improved with making the energy balance much more closed.

키워드

참고문헌

  1. Allen, R. G., Pereira, L.S., Raes, D., and Smith, M. (1998). Crop evapotranspiration. Guidelines for computing crop water requirements. FAO Irrigation and Drainage Paper No. 56, Food and Agricultural Organization of the United Nations, Rome, Italy.
  2. Baldocchi, D. (2003). "Assessing the eddy covariance technique for evaluating carbon dioxide exchange rates of ecosystems: past, present and future." Global Change Biology, Vol. 9, No. 4, pp. 479-492. https://doi.org/10.1046/j.1365-2486.2003.00629.x
  3. Baldocchi, D., Hicks, B., and Meyers, T. (1988). "Measuring biosphere-atmosphere exchanges of biologically related gases with micrometeorological methods." Ecology, Vol. 69, pp. 1331-1340. https://doi.org/10.2307/1941631
  4. Bastiaanssen, W.G.M., (1995). Regionalization of surface flux densities and moisture indicators in composite terrain: A remote sensing approach under clear skies in Mediterranean climates. Ph.D. Dissertation, Landbouwuniversiteitte Wageningen, The Netherlands.
  5. Choi, T., Kim, J., and Yun, J. (1999). "On using the eddy covariance method to study the interaction between agro-forest ecosystems and the atmosphere." Korean Journal of Agricultural and Forest Meteorology, Vol. 1, No. 1, pp. 1-15.
  6. Doorenbos, J., and Pruitt, W.O., (1977). "Crop water requirements. Irrigation and Drainage Paper No. 24, (rev.)." Food and Agricultural Organization of the United Nations, Rome, Italy.
  7. Jeong, S., Jang, K., Kang, S., Kim, J., Kondo, H., Gamo, M., Asauma, J., Saigusa, N., Wang, S., and Han, S. (2009). "Evaluation of MODIS-derived evapotranspiration at the flux tower sites in East Asia." Korean Journal of Agricultural and Forest Meteorology, Vol. 11, No. 4, pp. 174-184. https://doi.org/10.5532/KJAFM.2009.11.4.174
  8. Kang, M., Kwon, H., Lim, J.H., and Kim, J. (2009) "Understory evapotranspiration measured by eddycovariance in Gwangneung deciduous and coniferous forests." Korean Journal of Agricultural and Forest Meteorology, Vol. 11, No. 4, pp. 233-246. https://doi.org/10.5532/KJAFM.2009.11.4.233
  9. Kim, D., Lim, Y.J., Lee, S., and Choi, M. (2011). "Validation of energy and water fluxes using Korea Land Data Assimilation and flux tower measurement: Haenam KoFlux site's hydro-environment analysis." KSCE Journal of Civil Engineering, Vol. 31, No. 3, pp. 285-291.
  10. Kim, N.W., and Kim, C.K. (2004). "Comparison of Penman- Monteith method and Morton CARE method for estimating areal evapotranspiration." 2004 Korea Water Resources Association Conference, Incheon, Korea, 14-15 May, 2004. (In Korean with English abstract)
  11. Kim, Y., Cho, K., Kim, H., Um, H., and Choi, B. (2003). "Characteristics of the seasonal variation of the radiation in a mixed forest at Kwangneung arboretum." Journal of Korean Society for Atmospheric Environment, Vol. 19, No. 3, pp. 285-296.
  12. Kwon, H., and Kim, J. (2010) "KoFlux's progress: background, status and direction." Korean Journal of Agricultural and Forest Meteorology, Vol. 12, No. 4, pp. 241-263. https://doi.org/10.5532/KJAFM.2010.12.4.241
  13. Kwon, H., Lee, J.H., Lee, Y.K., Lee, J.W., Jung, S.W., and Kim, J. (2009). "Seasonal variations of evapotranspiration observed in a mixed forest in the Seolmacheon catchment." Korean Journal of Agricultural and Forest Meteorology, Vol. 11, No. 1, pp. 39-47. https://doi.org/10.5532/KJAFM.2009.11.1.039
  14. Lamaud, E., Ogee, J., Brunet, Y., and Berbigier, P. (2001). "Validation of eddy flux measurements above the understory of a pine forest." Agric. Forest. Meteorol., Vol. 106, pp. 187-203. https://doi.org/10.1016/S0168-1923(00)00215-X
  15. Montgomery, R.B. (1948). "Vertical eddy flux of heat in the atmosphere." J Meteorol, Vol. 5, pp. 265-274. https://doi.org/10.1175/1520-0469(1948)005<0265:VEFOHI>2.0.CO;2
  16. Obukhov, A.M. (1951). "Characteristics of the microstructure of the wind in the surface layer of the atmosphere." Izv. AN SSSR ser Geofiz, Vol. 3, pp. 49-68.
  17. Swinbank, W.C. (1951). "The measurement of vertical transfer of heat and water vapor by eddies in the lower atmosphere." J Meteorol., Vol. 8, pp. 135-145. https://doi.org/10.1175/1520-0469(1951)008<0135:TMOVTO>2.0.CO;2
  18. Twine, T.E., Kustas, W.P., Norman, J.M., Cook, D.R., Houser, P.R., Meyers, T.P., Prueger, J.H., Starks, P.J., and Wesely, M.L. (2000). "Correcting eddy-covariance flux underestimates over grassland." Agric. Forest. Meteorol., Vol. 103, pp. 279-300. https://doi.org/10.1016/S0168-1923(00)00123-4
  19. Wilson, K., Goldstein, A., Falge, E., Aubinet, M., Baldocchi, D., Berbigier, P., Bernhofer, C., Ceulemans, R., Dolman, H., Field, C., Grelle, A., Ibrom, A., Law, B.E., Kowalski, A., Meyers, T., Moncrieff, J., Monson, R., Oechel, W., Tenhunen, J., Valentini, R., and Verma, S. (2002). "Energy balance closure at FLUXNET sites." Agric. Forest. Meteorol., Vol. 113, pp. 223-243. https://doi.org/10.1016/S0168-1923(02)00109-0

피인용 문헌

  1. Estimation of Surface Fluxes Using Noah LSM and Assessment of the Applicability in Korean Peninsula vol.15, pp.4, 2013, https://doi.org/10.17663/JWR.2013.15.4.509