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서기원,Duane E. Waliser,Baijun Tian,김백민,박성찬,Steve Cocke,손병주,Masayoshi Ishii 한국기상학회 2012 Asia-Pacific Journal of Atmospheric Sciences Vol.48 No.2
Variations of global evapotranspiration (ET) and fresh water discharge from land to oceans (D) are important components of global climate change, but have not been well monitored. In this study, we present an estimate of twenty years (1989 to 2008) variations of global D and ET derived from satellite remote-sensed measurements and recent reanalysis products, ERA-Interim and CFSR, by using a novel application of the water balance equations separately over land and over oceans. Time series of annual mean global D and ET from both satellite observations and reanalyses show clear positive and negative trends, respectively, as a result of modest increase of oceanic evaporation (Eo). The inter-annual variations of D are similar to the in-situ-based observations, and the negative trend of ET supports the previous result that relative humidity has decreased while temperature has increased on land. The results suggest considerable sensitivity of the terrestrial hydrological cycles (e.g., D and ET) to small changes in precipitation and oceanic evaporation.
서기원 대한양계협회 1983 월간 양계 Vol.15 No.2
공업과는 달리 농업부문은 생산성향상을 위해 막대한 투자와 장구한 시간을 필요로 한다. 따라서 생산성향상을 위한 여건조성의 시간적 여유를 주지않고 생산성이 낮으니 수입을 자유화해 외국산 농축산물로 수요를 충당하는 것은 매우 위험스러운 접근이다.