지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
In this study, In order to evaluate reliable of MODIS GPP, the MODIS GPP and Flux tower measured GPP were compared to evaluate the use of method on 8 days composite MODIS GPP. The 2008 Flux data (CO₂Flux and air temperature) measured in Seolmacheon watershed (8.48 ㎢) were used. The Flux tower GPP was estimated as the sum of CO₂Flux and Re(ecosystem respiration) by Lloyd and Taylor method (1994). The summer Monsoon period from June to August mostly contributed the underestimation of MODIS GPP by cloud contamination on MODIS pixels. The 2008 MODIS GPP and Flux tower GPP of the watershed were 1133.2 g/m2/year and 1464.3 g/m2/year respectively and the determination coefficient (R2) after correction of cloud-originated errors was 0.74 (0.63 before correction). Even though effect of Cloud-Originated Errors was eliminated, Solar radiation and Temperature are affected at GPP. Measurement of correct GPP is difficult. But, If errors of MODIS GPP analyze on Cloud Moonsoon Climate in korea and eliminated effect of Cloud-Originated Errors, MODIS GPP will be considered GPP increasing of 9 %. There, Our results indicate that MODIS GPP show reliable and useful data except for summer period in Moonsoon Climate.
목차
등록된 정보가 없습니다.
참고문헌 (19)
참고문헌 신청
Cohen, W. B / 1999 / Validating MODIS terrestrial ecology products: linking in situ and satellite measurements / Remote Sensing of Environment 70 : 1 ~ 4
Heinsch, F. A / / User’s guide: GPP and NPP (MOD17A2/A3) products, NASA MODIS Land Algorithm
Hong, J. K / 2009 / Measurement of Evapotranspiration by Eddy-Covariance Technique : 2 ~ 4
Hong, W. Y / 2007 / Extraction of Snow Cover Area and Depth using MODIS Image for 5 River Basins in South Korea / KCID J 14 (2) : 65 ~ 75
Houghton, R. A / 1990 / Carbon Flux to the Atmosphere From Land-use Changes: 1850 to 1990
Heinsch, F. A / / User’s guide: GPP and NPP (MOD17A2/A3) products, NASA MODIS Land Algorithm
Hong, J. K / 2009 / Measurement of Evapotranspiration by Eddy-Covariance Technique : 2 ~ 4
Hong, W. Y / 2007 / Extraction of Snow Cover Area and Depth using MODIS Image for 5 River Basins in South Korea / KCID J 14 (2) : 65 ~ 75
Houghton, R. A / 1990 / Carbon Flux to the Atmosphere From Land-use Changes: 1850 to 1990
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