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海洋锋面对海洋物质输运和生态过程具有显著影响。秦皇岛海域是有害藻华、海洋污染等生态环境灾害的高发区，明确该区域海温锋面时空特征对深入理解其生态环境灾害发生机理具有重要意义。本文利用多尺度超高分辨率海表温度融合数据(MURSST)及温度梯度算法，探究2003—2024年秦皇岛海域海温锋面时空分布与演变特征，并分析其影响因素及生态效应。结论如下：(1)研究期内秦皇岛海温锋面强度及频率均值分别为0.033℃/km、41.51%,锋面中心线位于15～20 m等深线海域及山海关近岸海域，空间分布受水下地形影响。(2)海温锋面发生频率季节变化规律呈现夏秋季高、冬季次之、春季最低；锋面中心线附近海域则呈现秋冬季较高、春夏季较低；中心线夏季分布在10 m等深线附近，冬季外移至20 m等深线附近海域；锋面发生频率及空间结构的年际变化受滦河入海径流量、风速、海流速、海温等因素综合影响。(3)研究期内海温锋面强度及频率年均值呈持续升高趋势，且冬季上升最快；锋面中心线位置的年际变化主要发生在冬季，逐步由20 m等深线处向陆地移至15 m等深线处；锋面的年际变化受太平洋年代际震荡等因素影响。(4)海温锋面影响秦皇岛海域叶绿素浓度时空变化，锋面中心线是近岸叶绿素高值区与外海低值区的边界。
Abstract：Ocean fronts significantly influence material transport and ecological processes in marine environments.The Qinhuangdao sea area is highly susceptible to ecological and environmental disasters, such as harmful algal blooms and marine pollution.Clarifying the spatiotemporal characteristics of fronts in this region is essential for a deeper understanding of the mechanisms underlying these ecological and environmental disasters.Using multi-scale ultra-high resolution sea surface temperature(MURSST) data and a temperature gradient algorithm, this study investigates the distribution, seasonal cycle, and interannual variability of sea surface temperature(SST) fronts in the Qinhuangdao coastal waters from 2003 to 2024.Furthermore, the factors influencing SST front variations and their ecological effects are analyzed.The main findings are as follows.(1) During the study period, the mean intensity and occurrence frequency of SST fronts in the Qinhuangdao coastal waters were 0.033 ℃/km and 41.51%,respectively.The frontal core region is primarily located between the 15 m and 20 m isobaths, as well as in the nearshore waters off Shanhaiguan.This spatial pattern is strongly influenced by the underwater topography.(2) The seasonal occurrence frequency of SST fronts is highest in summer and autumn, moderate in winter, and lowest in spring.In the vicinity of the frontal core region, the occurrence frequency is higher in autumn and winter, and lower in spring and summer.Spatially, the frontal core region shifts to the vicinity of the 10 m isobath in summer and migrates offshore to the 20 m isobath in winter.The interannual variability of frontal occurrence frequency and spatial structure is driven by a combination of factors, including the throughflow of the Luan River, wind speed, current velocity, and sea surface temperature.(3) Over the study period, the annual mean intensity and occurrence frequency of SST fronts have shown a persistent increasing trend, with the fastest increase occurring in winter.The interannual migration of the frontal core region also predominantly occurred in winter, gradually moving landward from the 20 m isobath to the 15 m isobath.These long-term changes are linked to large-scale climate modes such as the Pacific Decadal Oscillation(PDO).(4)SST fronts significantly affect the spatiotemporal variation of chlorophyll-a concentration in the Qinhuangdao coastal waters.The frontal core region serves as the boundary between the nearshore high-concentration areas of chlorophyll-a and the offshore low-concentration areas.
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基本信息:
中图分类号:P731.11;X145
引用信息:
[1]程林,刘西汉,林磊,等.秦皇岛近海温度锋面时空变化特征研究[J].地理与地理信息科学,2026,42(03):27-37.
基金信息:
河北省科学院重点研发项目(25111);河北省科学院基本科研业务费试点项目(2015PF07)
2026-05-25
2026-05-25