| 本文已被：浏览 65次 下载 77次 |
码上扫一扫！ |
|
|
| 基于卫星遥感资料的2003—2019年南黄海浮游植物春季水华发生时间及其与海面湍动能生成率的关系 |
|
田晓露1, 毛新燕1, 史洁2, 王海燕3, 张芳苒4, 鹿有余5
|
|
1.中国海洋大学海洋与大气学院, 山东 青岛 266100;2.中国海洋大学 海洋环境与生态教育部重点实验室, 山东 青岛 266100;3.国家海洋环境预报中心, 北京 100080;4.北京5111信箱, 北京 100094;5.Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, Nova Scotia, Canada B2Y 4A2
|
|
| 摘要: |
| 春季是黄海一年中浮游生物生产力最高的时期,研究春季水华的时空变化对深入认识生态系统和渔业资源具有重要意义。针对水华发生时间这一重要指标,本文利用MODIS-Aqua卫星的叶绿素a浓度产品,将南黄海研究区域分为5个区块,分析了2003—2019年春季水华发生时间的空间分布和年际变化特征,并与该海域水动力条件进行对比。结果显示:南黄海春季水华从西北向东南逐渐推迟,时间跨度约40 d;于西部区块最早发生,约在3月下旬;在位于朝鲜半岛西岸的东部、北部区块与黄、东海交界处的南部区块最晚发生,约在5月上旬。在2003—2019年间,中部和北部区块的水华发生时间变化较小;东部和南部区块次之;西部区块变化最大。其中,各区块水华发生时间均以2008年最为特殊,较多年平均值提前10 d以上。本文发现,10 d内海面湍动能生成率的平均值小于3.5×10–6 m3/s3,是春季水华发生的必要动力条件。除上层海洋的稳定性之外,确定水华的发生还需要考虑浮游植物生长所需的营养盐供给等其它生化条件。 |
| 关键词: 浮游植物春季水华 发生时间 年际变化 海洋动力条件 南黄海 |
| DOI：10.11759/hykx20230916001 |
| 分类号:000 |
| 基金项目:国家自然科学基金联合基金项目(U2106204) |
|
| Onset dates of spring phytoplankton bloom in the Southern Yellow Sea during 2003-2019 based on satellite remote sensing data and the relationship with the generation rate of sea surface turbulent kinetic energy |
|
TIAN Xiaolu1, MAO Xinyan1, SHI Jie2, WANG Haiyan3, ZHANG Fangran4, LU Youyu5
|
|
1.College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China;2.Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, China;3.National Marine Environmental Forecasting Center, Beijing 100080, China;4.Beijing 5111 Mailbox, Beijing 100094, China;5.Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, Nova Scotia, B2Y 4A2, Canada
|
| Abstract: |
| Spring phytoplankton bloom (SPB) is a season in a year when the plankton productivity reaches its peak. Studying the space–time variations of SPB is important for understanding marine ecosystems and fishery resources. The onset time is one of the important parameters of SPB. In this study, the characteristics of the space–time variations of the SPB onset time in the southern Yellow Sea (SYS) during 2003–2019 are derived based on the chlorophyll-a concentration (Chl-a) product from the MODIS-Aqua satellite remote sensing. The results revealed that the SPB of the SYS gradually delayed from northwest to southeast, with a time of about 40 days. It begins in the western area in late March and finally ends off the west coast of the Korean Peninsula and near the boundary between the Yellow Sea and the East China Sea in early May. Interannual variations of the SPB onset time are assessed for five subregions of the SYS. The variability was weakest at the onset dates in the central and northern subregions, followed by the eastern and southern, and was strongest in the western subregion. During 2003–2019, 2008 was quite exceptional due to an earlier SPB onset by >10 days than the multi-year average, which occurred in all five subregions. To determine the relationship between variations of the SPB onset dates and ocean dynamic conditions, a condition for the SPB onset at 10-day averaged generation rate of the sea surface turbulent kinetic energy (TKERT) being less than 3.5×10−6 m3/s3is required. In addition to the upper ocean stability, the onset of SPB depends on other biochemical conditions, such as the supply of nutrients required for phytoplankton growth. |
| Key words: spring phytoplankton bloom onset time interannual variation ocean dynamic condition southern Yellow Sea |