한국농림기상학회지, 제 11권 제2호(2009) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 11, No. 2, (2009), pp. 79~85
DOI: 10.5532/KJAFM.2009.11.2.079
ⓒ Author(s) 2014. CC Attribution 3.0 License.


한국의 세 개의 다른 식생기능형태에서의 순복사 추정

연세대학교 대기과학과/지구환경연구소

(2009년 06월 22일 접수; 2009년 06월 25일 수정; 2009년 06월 25일 수락)

Estimation of Net Radiation in Three Different Plant
Functional Types in Korea

Global Environment Lab., Dept. of Atmospheric Sciences, Yonsei University, Seoul 120-749, Korea

(Received June 22, 2009; Revised June 25, 2009; Accepted June 25, 2009)

ABSTRACT
Net radiation (RN) is a driving force of biological and physical processes between the surface and the atmosphere and its knowledge is critical to weather forecasting and water resource management. The measurement of RN is, however, scarce and it is typically estimated from an empirical relationship. This study presented two different methods of RN estimation over three major plant functional types (i.e., a deciduous forest, a coniferous forest, and a farmland) in Korea. One is a linear regression method between RN and solar radiation and the other is a radiation balance method. The two methods were examined using the data collected in 2008 at the three sites. Based on the linear regression method over a year, RN was 70% of the incoming shortwave radiation (RS↓) for a deciduous forest, 79% for a coniferous forest, and 64% for a farmland, indicating that the relationship was plant functional type-specific. For the radiation balance method, the inclusion of longwave radiation component slightly improved RN estimations. Overall, there was a good agreement between the observed and the estimated RN from both methods, indicating a reliable applicability of the two methods in estimating RN.

Keyword: Net radiation, Solar radiation, Empirical relationship, Plant functional types

MAIN

적요

순복사는 지표와 대기간의 생물학적/물리적 과정을 일으키는 주요 원인이며 순복사에 대한 정확한 정보는 기후 예측뿐만 아니라 수자원관리에 중요한 역할을 한다. 그러나 실제 순복사 관측을 하는 지점은 매우 적으며 일반적으로 순복사는 단순 경험방정식으로부터 추정된다. 이 연구에서는 한국의 세 개의 다른 식생기능형태(예, 혼합림, 침엽수림, 그리고 농경지)에서 순복사를 추정하는 두 방법을 제시하였다. 첫번째 방법은 순복사와 전천일사의 관계를 선형회귀식으로 나타낸 방법이고 두번째 방법은 복사수지방정식을 사용한 방법이다. 세 개의 다른 식생기능형태에서 관측된 2008년 자료를 두 방법에 적용하여 순복사를 추정하였다. 일년자료를 사용하여 선형회귀식을 적용한 결과, 전천일사에 대한 순복사의 비율은 혼합림에서는 70%, 침엽수림에서는 79%, 그리고 농경지에서는 64%를 보였다. 이는 다른 식생기능형태에 따라 순복사와 전천일사의 관계가 달라짐을 보였다. 장파복사를 고려한 복사수지 방정식의 경우, 순복사 추정이 다소 향상되었다. 두 방법 모두 관측된 순복사와 추정된 순복사가 잘 일치함을 보였으며 이는 두 방법을 사용하여 순복사를 추정할 수 있음을 보여준다.

REFERENCES

Al-Yemeni, M., and J. Grace, 1995: Radiation balance of an alfalfa crop in Saudi Arabia. Journal of Arid Environment 29, 447-454crossref(new window)

Alados, I., I. Foyo-Moreno, F. J. Olmo, and L. Alados-Arboledas, 2003: Relationship between net radiation and solar radiation for semi-arid shrub-land. Agricultural and Forest Meteorology 116, 221-227crossref(new window)

Allen, R. G., L. S. Pereira, D. Raes, and M. Smith, 1998: Crop Evapotranspiration: Guidelines for Computing Crop Requirements. Irrigation and Drainage Paper, 56, Food and Agric. Organ. of the U.N., Rome

Betts, A. K., and J. H. Ball, 1997: Albedo over the boreal forest. Journal of Geophysics 102(D24), 28, 901-28, 910

Davies, J. A., 1965: The use of a Gunn-Bellani Distillator to determine net radiative flux in West Africa. Journal of Applied Meteorology 4, 547-549

Davies, J. A., 1966: A note on the relationship between net radiation and solar radiation. Quarterly Journal of the Royal Meteorological Society 93, 109-115crossref(new window)

Ekern, P. C., 1965: The Fraction of Sunlight Retained as Net Radiation in Hawaii. Journal of Geophysical Research 70(4), 785-793crossref(new window)

Ellingson, R. G., 1995: Surface longwave fluxes from satellite observations: A critical review. Remote Sensing Environment 51, 8997

Gay, L. W., 1971: The regression of net radiation upon solar radiation. Archives for Meteorology Geophysics and Bioclimatology 19, 1-14

Hong, J., and J. Kim, 2008: Simulation of surface radiation balance on the Tibetan Plateau. Geophysical Research Letter, 35, L08814, doi:10.1029/2008GL033613crossref(new window)

Korea Meteorological Administration, 2008: Annual climatological report. 304pp

Kim, J., D. Lee, J. Hong, S. Kang, S.-J. Kim, S.-K. Moon, J.-H. Lim, Y. Son, J. Lee, S. Kim, N. Woo, K. Kim, B. Lee, B.-L. Lee, and S. Kim, 2006: HydroKorea and CarboKorea: cross-scale studies of ecohydrology and biogeochemistry in a heterogeneous and complex forest catchment of Korea. Ecological Research 21, 881-889crossref(new window)

Kjaersgarrd, J. H., R. H. Cuenca, F. L. Plauborg, and S. Hansen, 2007: Long-term comparisons of net radiation calculation schemes. Boundary-Layer Meteorology 123, 417-431crossref(new window)

Lee, D., J. Kim, S.-J. Kim, S.-K. Moon, J. Lee, J.-H. Lim, Y. Son, S. Kang, S. Kim, K. Kim, N. Woo, B. Lee, and S. Kim, 2007: Lessons from cross-scale studies of water and carbon cycles in the Gwangneung forest catchment in a complex landscape of monsoon Korea. Korean Journal of Agricultural and Forest Meteorology 9, 149-160

Ryu, Y. S., Kang, S.-K. Moon, and J. Kim, 2008: Evaluation of land surface radiation balance derived from moderate resolution imaging spectroradiometer (MODIS) over complex terrain and heterogeneous landscape on clear sky days. Agricultural and Forest Meteorology 148, 1538-1552crossref(new window)

Shaw, R. H., 1956: A comparison of solar radiation and net radiation. Bulletin of the American Meteorological Society 37, 205-206

Tang, B., and Z.-L. Li, 2008: Estimation of instantaneous net surface longwave radiation from MODIS cloud-free data. Remote Sensing Environment 112, 3482-3492crossref(new window)

Willmott, C. J., 1982: Some comments on the evaluation of model performance. Bulletin of the American Meteorological Society 63, 1309-1313

Zhang, Y. Q., F. H. S. Chiew, L. Zhang, R. Leuning, and H.A. Cleugh, 2008: Estimating catchment vaporation and runoff using MODIS leaf area index and the Penman-Monetith equation. Water Resources Research 44, W10420, doi:10.1029/2007WR006563crossref(new window)