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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/35326

Title: 印度洋與太平洋相鄰海域之衛星觀測
Satellite Observations of the Indian-Western Pacific Ocean
Authors: Meei-Yur Liu
劉美妤
Contributors: NTOU:Department of Marine Environmental Informatics
國立臺灣海洋大學:海洋環境資訊學系
Keywords: 東北印度洋與西太平洋海域;葉綠素甲濃度;海表面溫度;海表面風場
Northeastern Indian and Western Pacific Ocean;chlorophyll-a concentration;sea surface temperature;sea surface wind
Date: 2012
Issue Date: 2013-10-07T02:53:48Z
Abstract: 本研究利用2002年7月至2011年7月的美國航空暨太空總署之Aqua衛星上的中解析度成像分光輻射計(Moderate Resolution Imaging Spectroradiometer, MODIS)的衛星葉綠素甲濃度與海表溫資料,以及2001年1月至2009年10月的QuikSCAT衛星的微波散射計(SeaWinds)的海表面風場資料,來研究東北印度洋與西太平洋相鄰海域之葉綠素甲濃度、海表溫和海表面風場之長期月平均變化及彼此之間的相關性。研究結果顯示,研究區的葉綠素甲濃度、海表溫和風場依不同經緯度的海域,主要呈現季節性的變化。以葉綠素甲濃度而言,以地理位置來看,陸地沿岸的濃度較高,離岸的海洋中葉綠素甲濃度較低。以季節來看,4月、5月與6月整體的濃度較低,相較之下, 11月、12月與1月的整體濃度最高。海表溫在近岸區低於離岸區,緯度愈低則溫度相對愈高,最低海表溫在1月與2月,且空間變化大。最高海表溫在印度洋區為4月與5月,且整個海域的溫度皆高。在南海區為5月、6月與7月,在西太平洋區為7月、8月與9月。就海表面風場而言,主要呈現季節變化。11月、12月與1月吹東北風,6月、7月與8月吹西南風,4月與9月為季風轉換時期。以區域來看,印度洋區6月、7月與8月的海表面風速高於11月、12月與1月,在南海區與西太平洋區11月、12月與1月的海表面風速則高於6月、7月與8月。就跨年變化而言,葉綠素甲濃度在2008年7月呈現異常高值。且研究顯示:葉綠素甲濃度與海表溫呈現負相關,海表溫和風速呈現負相關,葉綠素甲濃度與風速呈現正相關,但相關性並不十分明顯。
In this study, satellite-derived Aqua/MODIS chlorophyll-a concentration(Chl-a)and sea surface temperature(SST)during the period from July 2002 to July 2011, and QuikSCAT/SeaWinds sea surface wind(SSW)from Jan 2001 to Oct 2009, are used to research their variations in the Northeastern Indian and Western Pacific Ocean. Results show that Chl-a, SST, SSW in various latitude regions, differ according to seasonal change. Geographically, higher Chl-a is always found on coastal areas, and the more offshore the lower Chl-a. Meanwhile, the highest Chl-a is found in December and January. For the SST, it is always lower along the coastal area than the offshore water. Furthermore, winter waters are colder with spatial distribution highly related to the botton topography. Summer water temperatures are warmer and nearly spatially homogeneous. The SST is mainly seasonal in the study area, the lower SST with higher spatial variation happens in December and January. the higher SST with less spatial change happens in June and July. The SSW varies according to seasonal change, prevailing winds come from the northeast, and is stronger in December and January., but prevails southwest and is weaker in June and July. For inter-annual scale, the Chl-a in July 2008 is abnormal higher in the study area. It is also found that Chl-a and SST shows a negative correlation, SSW and SST shows a negative correlation, while Chl-a and SSW are positively correlated, but their relation is not so clear.
URI: http://ethesys.lib.ntou.edu.tw/cdrfb3/record/#G004994E013
http://ntour.ntou.edu.tw/handle/987654321/35326
Appears in Collections:[海洋環境資訊系] 博碩士論文

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