| 辽东湾表层叶绿素浓度时空变化遥感分析 |
| Remote Sensing Analysis of Temporal and Spatial Changes of Sea Surface Chlorophyll Concentration in Liaodong Bay |
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| DOI： |
| 中文关键词: GOCI 辽东湾 叶绿素a 时空变化 |
| 英文关键词:GOCI Liaodong bay chlorophyll-a variation of temporal and spatia |
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| 中文摘要: |
| 叶绿素浓度是评价海水的一项重要指标，它对于渤海北部的辽东湾海域具有重要的研究价值。2011年投入使用的静止轨道水色传感器GOCI有较高的时空分辨率，本文利用GOCI数据获取叶绿素含量的季节分布规律，分析了辽东湾海域表层叶绿素含量时空变化及演变特征，证明了利用GOCI叶绿素产品观察赤潮的可行性。结果显示：2015年辽东湾海域叶绿素浓度在总体空间分布上呈现近岸较高、海湾中央海域较低的特点。叶绿素浓度的月平均值为3.50～5.35 域叶绿素，秋冬季高于春夏季。秦皇岛海域叶绿素浓度普遍高于其他海域，营口海域也有较高的分布，但不及秦皇岛海域。秦皇岛沿岸海域叶绿素浓度常年保持在一个较高水平，冬季及早春受西北风影响，秦皇岛附近海域表层海流携带浮游植物流动形成了自西北向东南叶绿素浓度从高到低的分布趋势。通过2015年6月14、17和20日秦皇岛海域的叶绿素浓度分布观察到了一次夜光藻赤潮的发生和消亡。因此，GOCI数据可以应用于监测叶绿素浓度的时空变化和观察赤潮的发生和消亡。 |
| 英文摘要: |
| Chlorophyll concentration is an important index for evaluating sea water. It isvaluable toresearchin Liaodong Bay of the northern Bohai Sea.The geostationary orbit water color sensor GOCI, which was put into use in 2011, has a high spatial and temporal resolution, in this paper, the seasonal distribution of chlorophyll concentration was obtained, the temporal and spatial variation and evolution characteristics of chlorophyll concentration in the surface water of Liaodong Bay were analyzedby GOCI data. The feasibility of observing the red tide by using GOCI chlorophyll products was proved. The results showed that chlorophyll concentration in Liaodong Bay in 2015 was high in the coastal area and low in the central sea area.The monthly mean of chlorophyll concentration ranged from 3.50 to 5.35 μg/L, and that in autumn and winter was higher than spring and summer.The chlorophyll concentration of Qinhuangdao sea area was generally higher than that of other sea areas, and Yingkou sea area also had a high distribution, but it was lower than that of Qinhuangdao sea area.The chlorophyll concentration in the coastal waters of Qinhuangdao kept at a high level all the year round.Affected by the northwest wind in winter and early spring, Phytoplankton carried by surface currents in the waters near Qinhuangdao formed a distribution trend of chlorophyll concentration from high to low from northwest to southeast. The occurrence and disappearance of noctilucent algae red tide was observed by chlorophyll concentration distribution in Qinhuangdao waters on June 14, 17 and 20, 2015.Therefore, GOCI data canbeusedtomonitor the spatial and temporal changes of chlorophyll concentration and the occurrence and disappearance of red tide. |
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