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NTIS 바로가기Ocean and polar research, v.32 no.2, 2010년, pp.145 - 156
이태희 (한국해양연구원 남해연구소) , 김동선 (한국해양연구원 기후.연안재해연구부) , 김부근 (부산대학교 자연과학대학 해양시스템과학과) , 최동림 (한국해양연구원 남해연구소)
This study investigated organic carbon fluxes in Ulleung Basin sediments, East Sea based on a chamber experiment and geochemical analyses. At depths greater than 2,000 m, Ulleung Basin sediments have high organic carbon contents (over 2.0%). Apparent sedimentation rates (ASR) calculated from excess ...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
대기의 이산화탄소 농도가 급격하게 증가한 이유는? | 1800년대 이후로 화석연료의 사용량이 급격하게 증가함에 따라 대기의 이산화탄소 농도가 급격하게 증가하였다. 대기의 이산화탄소 농도는 1800년에는 281±2 ppm이었으나 1994년에는 359±0. | |
해양의 표층에서 생산된 입자성 유기탄소의 특징은? | 해양의 표층에서 생산된 입자성 유기탄소(particulate organic carbon: POC)는 해양의 표층(~200 m) 부근에서 대부분 다 분해되어 재순환되고 일부만 심해로 이동하게 된다. 심해로 이동하는 과정에서도 대부분의 유기탄소는 재순환되어 수층으로 되돌려지고 극히 일부만이 퇴적물로 침강하게 된다. | |
입자크기가 충분히 큰 유기물은 대기의 이산화탄소를 심해퇴적물로 수송하는 매우 중요한 역할을 한다고 본 이유는? | 수직적인 유기탄소 플럭스는 입자의 침강속도에 비례하고, 입자의 크기와 침강속도 또한 비례한다. 즉 크기가 큰 입자가 빠른 속도로 침강하게 되면 재순환되어 수층으로 되돌아가는 유기탄소의 양은 감소하고, 퇴적물로 퇴적되는 양은 상대적으로 증가한다. 따라서 입자크기가 충분히 큰 유기물은 대기의 이산화탄소를 심해퇴적물로 수송하는 매우 중요한 역할을 한다(Trull et al. |
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