한국농림기상학회지, 제 1권 제1호(1999) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 1, No. 1, (1999), pp. 52~59
ⓒ Author(s) 2014. CC Attribution 3.0 License.


생화학 및 생물리 모수들의 도출과 생권 모형(SiB2)에의 적용

채남이, 김준
연세대학교 대기과학과/지구환경연구소

(1999년 08월 11일 접수)

Derivation of Biochemical and Biophysical Parameters and Their
Application to the Simple Biosphere Model (SiB2)

Nam-Yi Chae, Joon Kim
Department of Atmoshperic Sciences, Global Environment Laboratory,
Yonsei University, Seoul, Korea, 120-749

(Manuscript received 11 August 1999)

ABSTRACT
Vegetation canopy plays an important role in $CO_2$ 수식 이미지/$H_2$ 수식 이미지O exchange between the biosphere and the atmosphere by controlling leaf stomata. In this study, rice (Oryza sativa L.), a staple crop in Asia was investigated to formulate its single leaf model of photosynthesis and stomatal conductance. Photosynthesis and stomatal conductance were measured with a portable infrared gas analyzer system. Other plant and meteorological variables were also measured. To evaluate empirical constants in this biochemical leaf model, nonlinear least squares technique was used. The maximum catalytic activity of enzyme and the maximum rate of electron transport were $ 100\mu$ 수식 이미지$m^{-2}$ 수식 이미지 $s^{-1}$ 수식 이미지 and $140 \mu$ 수식 이미지㏖ m$^{-2}$ 수식 이미지 s$^{-1}$ 수식 이미지 (@ 35$^{\circ}C$ 수식 이미지), respectively. The empirical constants, m and b, associated with stomatal conductance model were 9.7 and $0.06 m^{-2}$ 수식 이미지 $s^{-1}$ 수식 이미지 , respectively. On a leaf scale, agreements between the modeled and the measured values of photosynthesis and stomatal conductance were on average within 20%, and the simulation of diurnal variation was also satisfactory On a canopy scale, the Simple Biosphere model(SiB2) was tested using the derived parameters. The modeled energy fluxes were compared against the micrometeorologically measured fluxes over a rice canopy. Agreements between the modeled and the measured values of net radiation, sensible heat and latent heat fluxes, and $CO_2$ 수식 이미지 flux (i.e., net canopy photosynthesis) were on average within 25%.

Keyword : photosynthesis, stomatal conductance, rice, biochemical model, SiB2

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