Effects of Atmospheric Organic Nitrogen Flux on Ocean Biogeochemistry and Ecosystems

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Project title

Code/計畫編號

MOST103-2611-M019-005

Translated Name/計畫中文名

全球變遷對西北太平洋臺灣海域海洋生物地球化學與生態系統影響之長期觀測與研究 (I)－子計畫：全球變遷因子對東海及西北太平洋黑潮海域大氣懸浮微粒有機氮通量關係之影響

Project Coordinator/計畫主持人

Hung-Yu Chen

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Marine Environmental Informatics

Website

https://www.grb.gov.tw/search/planDetail?id=8346890

Year

2014

Start date/計畫起

01-08-2014

Expected Completion/計畫迄

01-07-2015

Bugetid/研究經費

1157千元

ResearchField/研究領域

海洋科學

"Gruber and Galloway (2008)在 Nature文章中指出，全球人類為獲取更多的食物而大規模土地開發和大量使用肥料，造成氮循環的急遽加速；但是，也導致環境產生一些問題，從陸地與水生環境的優養化到全球的酸化。在過去的 150年間，藉由大氣輸送到海洋的營養鹽濃度，在某些區域，已經增加高達千倍；而且在短期和中期的未來，這個增加趨勢還會持續。在本計畫中，我們將以基隆與彭佳嶼兩測站現場實測資料，探討藉由大氣輸送的有機氮進入東海和西北太平洋的量。從我們過去發表的相關論文 (Chen and Chen, 2008; Chen et al., 2010, 2011)，我們將嘗試將這些資料統整，以估算大氣中無機和有機營養鹽進入西北太平洋表層的通量。我們過去的研究發現，這些通量明顯受到氣團來源區域的影響。因此，本計畫的目標有： (1) 藉由氣膠採樣器採集大氣懸浮微粒，瞭解有機氮物種濃度隨時間分佈的情形，藉以探討有機氮物種之傳輸機制。 (2) 利用主要陰、陽離子鑑識技術及統計分析，針對大氣懸浮微粒中有機氮物種成份含量特徵追蹤來源。 (3) 藉由各樣品間的相關性，判別大氣懸浮微粒中有機氮物種之來源。 (4) 計算有機氮物種之通量值，瞭解區域相對貢獻程度；並提供其他子計畫大氣氮物種輸入資訊，以探討其對海洋環境生態之影響。" "Gruber and Galloway (2008; Nature) indicate that the massive acceleration of the nitrogen cycle as a result of the production and industrial use of artificial nitrogen fertilizers worldwide has enabled humankind to greatly increase food production, but it has also led to a host of environmental problems, ranging from eutrophication of terrestrial and aquatic systems to global acidification. Atmospheric nutrient inputs to the ocean are estimated to have increased by up to a factor of three as a result of increased anthropogenic emissions over the last 150 years, with further increases expected in the short‐ to mid‐term at least. In this work we attempt to derive atmospheric organic nitrogen inputs to the East China Sea and Northwest Pacific Ocean using data obtained from aerosol and rain sampling on a land-based station and remote island. While the results of these data have been published (Chen and Chen, 2008; Chen et al., 2010, 2011), the goal of this research is to draw all our data together and estimate inorganic and organic nutrient inputs to surface Northwest Pacific waters. We have previously observed that nutrient concentrations in aerosol samples collected over the Northwest Pacific are heavily influenced by the air-mass derived source regions. The objective of this research include characterization of (1) transportation mechanisms of organic nitrogen in different season of the study area, (2) derived sources of air mass by using sodium ion and non-sea-salt ions, (3) sources of atmospheric organic species by using correlation analysis, and (4) impact of atmospheric organic nitrogen inputs on marine environment in this region."

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Effects of Atmospheric Organic Nitrogen Flux on Ocean Biogeochemistry and Ecosystems

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