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  1. NTU Scholars
  2. 理學院
  3. 海洋研究所
Please use this identifier to cite or link to this item: https://scholars.lib.ntu.edu.tw/handle/123456789/386557
Title: Synthesis of observed air-sea CO2 exchange fluxes in the river-dominated East China Sea and improved estimates of annual and seasonal net mean fluxes
Authors: Tseng, C.-M.
Shen, P.-Y.
Liu, K.-K.
CHUN-MAO TSENG 
Issue Date: 2014
Journal Volume: 11
Journal Issue: 14
Start page/Pages: 3855-3870
Source: Biogeosciences 
Abstract: 
Limited observations exist for a reliable assessment of annual CO 2 uptake that takes into consideration the strong seasonal variation in the river-dominated East China Sea (ECS). Here we explore seasonally representative CO2 uptakes by the whole East China Sea derived from observations over a 14-year period. We firstly identified the biological sequestration of CO2 taking place in the highly productive, nutrient-enriched Changjiang River plume, dictated by the Changjiang River discharge in warm seasons. We have therefore established an empirical algorithm as a function of sea surface temperature (SST) and Changjiang River discharge (CRD) for predicting sea surface pCO2. Syntheses based on both observations and models show that the annually averaged CO2 uptake from atmosphere during the period 1998-2011 was constrained to about 1.8±0.5 molCm-2 yr-1. This assessment of annual CO2 uptake is more reliable and representative, compared to previous estimates, in terms of temporal and spatial coverage. Additionally, the CO 2 time series, exhibiting distinct seasonal pattern, gives mean fluxes of-3.7±0.5,-1.1±1.3,-0.3±0.8 and-2.5±0.7 molCm-2 yr-1 in spring, summer, fall and winter, respectively, and also reveals apparent interannual variations. The flux seasonality shows a strong sink in spring and a weak source in late summer-mid-fall. The weak sink status during warm periods in summer-fall is fairly sensitive to changes of pCO2 and may easily shift from a sink to a source altered by environmental changes under climate change and anthropogenic forcing. © 2014 Author(s).
URI: http://www.scopus.com/inward/record.url?eid=2-s2.0-84905233240&partnerID=MN8TOARS
http://scholars.lib.ntu.edu.tw/handle/123456789/386557
DOI: 10.5194/bg-11-3855-2014
SDG/Keyword: [SDGs]SDG13
Appears in Collections:海洋研究所

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臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

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開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

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