發(fā)布時間：2018-04-01 23:08

  本文選題：瓊東　切入點(diǎn)：粵西　出處：《熱帶海洋學(xué)報》2016年05期

【摘要】：以2006—2013年衛(wèi)星遙感海表溫度資料(GHRSST SST)為基礎(chǔ),通過數(shù)字圖像處理的邊緣檢測方法提取溫度鋒面的核心位置,分析了瓊東、粵西海域海表溫度鋒位置及強(qiáng)度的季節(jié)變化和年際變化特征,并進(jìn)一步結(jié)合海面高度異常資料和海面風(fēng)場資料探討了溫度鋒變化的可能機(jī)制。分析結(jié)果表明,瓊東、粵西海域溫度鋒的空間分布及鋒面強(qiáng)度存在顯著的季節(jié)變化,沿岸風(fēng)應(yīng)力是影響該海域鋒面變化的主要動力因素。夏季溫度鋒面主要分布于瓊東沿岸的東部及南部海域近岸50m到100m等深線之間,而冬季則主要分布在瓊東的東部海域和粵西沿岸20m到100m等深線之間,春秋兩季為其過渡季節(jié);鋒面強(qiáng)度的季節(jié)變化表現(xiàn)為冬季最強(qiáng),春季、夏季次之,秋季最弱,其冬季鋒面強(qiáng)度平均值可達(dá)到3℃?100km 1,夏季為1.7℃?100km 1;同時,鋒面核心位置及強(qiáng)度的分析結(jié)果表明,瓊東和粵西海域溫度鋒也存在較強(qiáng)的年際變化。
[Abstract]:Based on satellite remote sensing sea surface temperature data (GHRSST SST) from 2006 to 2013, the core position of temperature front is extracted by edge detection method of digital image processing. The seasonal and interannual variation characteristics of the position and intensity of sea surface temperature front in western Guangdong are discussed, and the possible mechanism of temperature front variation is discussed by combining the sea surface height anomaly data and sea surface wind field data. The spatial distribution of the temperature front and the intensity of the front in western Guangdong have significant seasonal variations. The coastal wind stress is the main dynamic factor affecting the variation of the sea front, and the summer temperature front mainly distributes between the isobath of 50 m to 100 m in the eastern and southern coastal areas of east and south of Qiongdong. In winter, it mainly distributes between the eastern sea area of Qiongdong and the isobath between 20m and 100m along the coast of western Guangdong, and the transition season is spring and autumn, the seasonal variation of frontal intensity is the strongest in winter, followed by spring, summer and autumn. The average winter frontal strength can reach 3 鈩，

本文編號：1697692