한국농림기상학회지, 제 2권 제3호(2000) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 2, No. 3, (2000), pp. 75~79
ⓒ Author(s) 2014. CC Attribution 3.0 License.


증발산 장기 관측에 따른 크립톤 습도계의 흡수 계수의
변화와 이슬점 생성기를 이용한 기기 보정

박윤호(1), 김준(1,2), 이희춘(3), 임종환(4), 권원태(5)
(1)연세대학교 대기과학과, (2)대기모형연구실, (3)기상청,
(4)임업연구원 산림 생태과, (5)기상연구소 기후연구실

(2000년 07월 26일 접수)

Changes in Absorption Coefficient of Krypton Hygrometer in
Long-term Monitoring of Evapotranspiration and Its
Calibration Using a Dew Point Generator

Yunho Park(1), Joon Kim(1,2), Heechoon Lee(3), Jonghwan Lim(4), Wontae Kwon(5)
(1)Depart of Atmospheric Sciences, (2)National Laboratory of Atmospheric Modeling Research, Yonsei University
(3)Korea Meteorological Administration, (4)Forest Ecology, KFRI
(5)Korea Meteorological Research Institute, Climate Research Laboratory

(Manuscript received July 26, 2000)

ABSTRACT
Calibrations of fast-response krypton hygrometers were carried out using a dew-point hygrometer to investigate the changes in their absorption coefficients due to long-term field operation. Absorption coefficients changed proportionally with the number of hours of field operation. The increase in absorption coefficient indicates that the water vapor flux, calculated with the original absorption coefficient, would underestimate the true flux in the field. To minimize the uncertainty in quantifying evapotranspiration and surface energy budget studies, frequent calibrations (for example, every 1500 hours of field operation) of krypton hygrometer are recommended.

Keyword: Calibration, Hygrometer, Dew point generator, Evapotranspiration

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