한국농공학회논문집 (Journal of The Korean Society of Agricultural Engineers)

  • 제53권2호
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  • Pages.1-8
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  • 2011
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  • 1738-3692(pISSN)
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  • 2093-7709(eISSN)
한국농공학회 (The Korean Society of Agricultural Engineers)
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설마천 유역 CO2 Flux 실측 자료에 의한 총일차생산성 (GPP)과 MODIS GPP간의 비교 평가

Evaluation of MODIS Gross Primary Production (GPP) by Comparing with GPP from CO2 Flux Data Measured in a Mixed Forest Area

  • 정충길 (건국대학교 대학원 사회환경시스템공학과) ;
  • 신형진 (건국대학교 대학원 사회환경시스템공학과) ;
  • 박민지 (건국대학교 대학원 사회환경시스템공학과) ;
  • 조형경 (건국대학교 대학원 사회환경시스템공학과) ;
  • 김성준 (건국대학교 사회환경시스템공학과)
  • 투고 : 2010.11.29
  • 심사 : 2011.02.05
  • 발행 : 2011.03.31
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초록

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 ($CO_2$ Flux and air temperature) measured in Seolmacheon watershed ($8.48\;km^2$) were used. The Flux tower GPP was estimated as the sum of $CO_2$ Flux and $R_{ec}$ (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 $1133.2\;g/m^2/year$ and $1464.3\;g/m^2/year$ respectively and the determination coefficient ($R^2$) 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.

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참고문헌

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피인용 문헌

  1. Estimation of Net Primary Production for Nakdong River Basin using Vegetation Index vol.15, pp.10, 2014, https://doi.org/10.14481/jkges.2014.15.10.35