Title page for etd-0809114-023901


[Back to Results | New Search]

URN etd-0809114-023901
Author Jian-chih Chen
Author's Email Address No Public.
Statistics This thesis had been viewed 5351 times. Download 4 times.
Department Department of Oceanography
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Short-term variation of particulate organic carbon fluxes in different marine environments
Date of Defense 2014-07-01
Page Count 71
Keyword
  • particle solubilization
  • POC flux
  • sediment trap
  • time-series
  • short-term deployment
  • Abstract Sediment traps have been used to directly collect sinking particles in the ocean. Long-term (days to weeks) deployment of sediment traps are frequently used to measure particulate organic carbon (POC) fluxes at the bottom of the euphotic zone of the ocean. However, long-term deployment of traps may confront difficulties, for example, longer deployment-recovery time (at least 24 hours), unexpected weather conditions, and/or interference by fishing activity, which may result in trap damage or lost. To better understand if short-term (hours) trap deployment can be used to evaluate POC fluxes in the ocean, we conducted short-term deployment of floating sediment traps and measured fluxes of sinking POC in different marine environments, including the southern East China Sea, northern South China Sea and western North Pacific Ocean. The results demonstrate that total trapped masses and POC significantly and positively correlated with deployment time at all the study sites, suggesting that fluxes of mass and POC in sinking particles are proportional to deployment time. At all the study sites, the characteristics of the water column did not show remarkable variation before and after deployments of sediment traps; moreover, the integrated chlorophyll a concentrations and POC inventories in the water column exhibited only small variation during trap-deployment periods. POC fluxes (average ± SD) were 134 ± 32 mg m−2 d−1 in the southern East China Sea, 23 ± 5 mg m−2 d−1 in the northern South China Sea and 73 ± 4 mg m−2 d−1 in the western North Pacific Ocean. Particle fluxes had no remarkable diel variation. Overall, the results of this study suggest that short-term deployment of sediment traps can be used to evaluate POC fluxes in the ocean if the characteristics of the water column are stable. Such the short-term deployment of traps could potentially reduce the error in POC flux estimation caused by particle solubilization and the probability of trap damage or lost.
    Advisory Committee
  • Hung-yu Chen - chair
  • Fung-Chi Ko - co-chair
  • Wen-Tseng Lo - co-chair
  • Shih-Chieh Hsu - co-chair
  • Chin-Chang Hung - advisor
  • Files
  • etd-0809114-023901.pdf
  • Indicate in-campus at 3 year and off-campus access at 5 year.
    Date of Submission 2014-09-09

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys