Effects of Global Change on Ocean Biogeochemistry and Ecosystems in the Seas Surrounding Taiwan in the Western North Pacific (I): Modeling Studies on the Effects of Iron Deposition from Aerosol Particles

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Project title

Code/計畫編號

NSC102-2611-M019-017

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中鐵沈降量影響之模擬分析

Project Coordinator/計畫主持人

Fu-Jung Tsai

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=3084842

Year

2013

Start date/計畫起

01-08-2013

Expected Completion/計畫迄

01-07-2014

Bugetid/研究經費

385千元

ResearchField/研究領域

海洋科學

Description

Abstract

" 在亞洲因為全球氣候變遷與暖化造成沙漠化的改變及近年來中國大陸經濟的快速成長所造成空氣污染物排放的增加, 兩者都可能使大氣顆粒物中沈降量增加，進而影響到東亞的東海及西北太平洋黑潮海域。其中大氣顆粒物中的鐵為浮游植物所需營養鹽，鐵的增加或改變將會影響到浮游植物的固氮作用，進而影響到海洋生態。目前亞洲環境正在急遽變化中，在2009與2010年因大陸嚴重的乾旱產生大的沙塵暴，造成了台灣近20年來最嚴重的沙塵事件，另外目前研究也顯示近年來中國的大氣污染物急速增加，因此在東亞海域因全球變遷所造成大氣顆粒物中鐵沈降量的影響也有待進一步評估。  為了評估因嚴重的沙塵事件與中國人為污染物劇增所造成的大氣沈降營養鹽中鐵的改變，本研究擬採用3度空間東亞的區域性大氣模式(TAQM)模擬估算全球變遷中，及對東海及西北太平洋海洋生產力的影響。TAQM大氣模式由美國引進，於台灣的大氣與環境領域已應用多年，與環境觀測驗證也有很好的結果，因此適合應用於探討大氣沈降營養成份分析。另外，除了模式模擬，本研究也將利用整合型計畫中的其他觀測結果，配合模式來分析瞭解東亞及西北太平洋海域整個大範圍與長時間的鐵沈降的影響。    本計畫預期以兩年時間分階段完成分析嚴重沙塵事件的觀測資料，中國污染物中鐵的資料收集分析，以及大氣沈降模式的程式修改與模擬；接者分析模擬結果，計算鐵在東海及西北太平洋黑潮海域的沈降量， 浮游植物等基礎生產力的改變，比對衛星資料中葉綠素的增長數據，探討大氣沈降量中鐵因全球變遷對東海及西北太平洋黑潮海域生地化的影響。 " "In Asia, global change results in warming effects can lead to desertification. In addition, recent fast growth of Chinese economics results in increasing emissions of air pollutants. Both can potentially change the deposition amount of atmospheric particles, and therefore change of marine ecology. During 2009 and 2010, the most severe dust storms over the past 20 years have been observed in Taiwan. In addition, the emissions of atmospheric pollution from China have been observed to increase, indicating the rapid environmental change in East Asia. As a result, the change of iron deposition due to change of aerosol particles and thus the ensuing change in marine ecosystem require further investigation. This research intend to apply 3 dimensional-regional atmospheric model (TAQM) to estimate the change of iron deposition due to severe dust events, as well as the rapid increase of anthropogenic pollution from China over East Asia, and to estimate the resulting impacts on the East China Sea and the Western Pacific. TAQM is the atmospheric model originated from the United State, and has been applied in evaluating the Taiwan air quality for many years with good correlations with local observations. Thus, the model is applicable in analyzing the aerosol depositions on oceans. In addition to modeling, this research also intend to use the observations obtained from the conformity projects to analyze the magnitude of iron deposition and the potential impacts on marine primary production. This project intend to finish the following items step by step in two years, including analyzing the observations of severe dust events, the iron data in the China air pollution measurements, modifying the model code and running the model, analyzing the modeling results, calculating the iron deposition in the East China Sea and the Western Pacific Kuroshio areas, estimating the change of the phytoplankton or primary production, comparing the satellite data of chlorophyll production, studying the effects of global environmental change on iron deposition as well as the biogeochemical change over the East China Sea and Western Pacific Kuroshio areas."