Effects of Environmental Changes on Carbon Chemistry of Seawater in the East China Sea

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Project title

Code/計畫編號

NSC98-2611-M019-013

Translated Name/計畫中文名

東海長期觀測與研究(IV)---子計畫---碳化學系統與環境變遷之關係

Project Coordinator/計畫主持人

Wen-Chen Chou

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Institute of Marine Environment and Ecology

Website

https://www.grb.gov.tw/search/planDetail?id=1885325

Year

2009

Start date/計畫起

01-08-2009

Expected Completion/計畫迄

01-07-2010

Bugetid/研究經費

1438千元

ResearchField/研究領域

海洋科學

"東海長期觀測與研究（四）整合型計畫之總目標，旨在探討氣候變遷與人為擾動對東海生物地球化學循環與生態系統所可能造成的衝擊與影響。在此總目標下，本子計畫所負責之研究項目為瞭解東海海水溶解態無機碳碳化學系統與環境變遷之關係。本子計畫所擬定之具體研究課題，包括下列四項：（1）瞭解何以異營性之東海陸棚水卻仍可以是大氣二氧化碳之「匯」此一矛盾現象的成因；（2）探討夏秋交替時期及極端氣候事件發生時，是否為原本透過生物泵浦所吸收並儲存於次表層水和底層水中之二氧化碳，重新釋放回大氣的關鍵時刻？以及此一現象是否與低溶區的分布有關？（3）瞭解顆粒態有機質在生產與分解過程中，碳和其它營養鹽元素吸收與釋放之相對比例，以及此比例與東海吸收大氣二氧化碳能力之相關性；（4）探討三峽大壩運轉後，東海海水溶解態無機碳碳化學系統的改變情形，及此種改變對東海吸收二氧化碳能力所可能造成的影響。" "The integrated program “Long-term Observation and Research of the East China Sea – IV” aims to understand the influences of both the natural and anthropogenic perturbations on the biogeochemical cycles and ecological system of the East China Sea (ECS), with emphasis on the effect of the construction of the Three-Gorges Dam. As part of the LORECS-IV program, this sub-proposal would focus on the shift of carbon chemistry in the ECS shelf waters in response to global changes. The objectives of this study would include: (1) to elucidate the mechanism resulting in the paradox of “the heterotrophic waters of the ECS shelf can act as a significant CO2 sink”; (2) to examine whether the CO2 stored in the subsurface waters, which is derived from the remineralization of photosynthetically fixed POC in the surface waters, can return to the surface and diffuse back to the atmosphere during the severe weather events in summer (e.g. typhoon) and the prevailing period of northeast monsoon in early autumn; (3) to study whether the nutrients are preferentially recycled with respect to carbon in the ECS and its implication on CO2 sequestration; and (4) to study the shift of carbon chemistry of seawater after the completion of the Three-Gorges Dam, and its potential impact on the capacity of CO2 uptake."

Keyword(s)

二氧化碳
東海
碳循環
carbon dioxide
East China Sea
carbon cycle

DSpace CRIS

Effects of Environmental Changes on Carbon Chemistry of Seawater in the East China Sea

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