Using AVISO satellite altimeter observations during 1993–2015 and a manual eddy detection method, a total of 276 anticyclonic rings and 242 cyclonic rings shed from the Kuroshio Extension(KE) were identified, and the...Using AVISO satellite altimeter observations during 1993–2015 and a manual eddy detection method, a total of 276 anticyclonic rings and 242 cyclonic rings shed from the Kuroshio Extension(KE) were identified, and their three-dimensional(3D) anomaly structures were further reconstructd based on the Argo float data and the Japan Agency for Marine-Earth Science and Technology(JAMSTEC) cruise and buoy data through an interpolation method. It is found that the cyclonic(anticyclonic) rings presented consistent negative(positive) anomalies of potential temperature;meanwhile the relevant maximum anomaly center became increasingly shallow for the cyclonic rings whereas it went deeper for the anticyclonic rings as the potential temperature anomaly decreased from the west to the east. The above deepening or shoaling trend is associated with the zonal change of the depth of the main thermocline. Moreover, the composite cold ring between 140° and 150°E was found to exhibit a double-core vertical structure due to the existence of mode water with low potential vorticity. Specifically, a relatively large negative(positive) salinity anomaly and a small positive(negative) one appeared for the composite cyclonic(anticyclonic) ring at the depth above and below 600 m, respectively. The underlying driving force for the temperature and salinity anomaly of the composite rings was also attempted, which varies depending on the intensity of the background current and the temperature and salinity fields in different areas of the KE region, and the rings’ influences on the temperature and salinity could reach deeper than 1 000 m on average.展开更多
基于环境学、生态学及矿区修复基础理论,从煤矿生态环境定量评价方法、环境评价因子指标体系以及评价等级标准三大模块出发,建立矿山生态环境定量评价规范化方法。根据煤矿生态环境的特点,结合RMMER(Regulation of Multitudinous Mine E...基于环境学、生态学及矿区修复基础理论,从煤矿生态环境定量评价方法、环境评价因子指标体系以及评价等级标准三大模块出发,建立矿山生态环境定量评价规范化方法。根据煤矿生态环境的特点,结合RMMER(Regulation of Multitudinous Mine Ecological Rehabilitation)模式,建立自然禀赋维、生态环境维及人文指数维煤矿生态环境三维定量评价指标体系。通过筛选确定煤矿生态环境两个层次三维体系下的16个指标因子;利用"多手段结合"的原则,确定煤矿生态环境质量等级标准及相应等级阈值。分析辽西阜新矿区煤矿开采状况和生态环境现状,采用信息提取技术定量指标因子;提出利用多次迭代法建立指标因子判断矩阵的方法;建立基于改进式层次分析法(AHP)法确定煤矿生态环境指标权重的阜新煤矿生态环境可拓综合评价模型;通过应用评价,最后对评价结果的客观性与准确性进行分析,给出评价模型的适用性。展开更多
基金The National Key Research and Development Program of China under contract No. 2016YFC1402607Scientific Research Foundation of Third Institude of Oceanography, Ministry of Nature Resources under contract Nos 2017012 and 2018001Global Change and Air-Sea Interaction Program under contract Nos GASI-IPOVAI-02 and GASI-IPOVAI-03.
文摘Using AVISO satellite altimeter observations during 1993–2015 and a manual eddy detection method, a total of 276 anticyclonic rings and 242 cyclonic rings shed from the Kuroshio Extension(KE) were identified, and their three-dimensional(3D) anomaly structures were further reconstructd based on the Argo float data and the Japan Agency for Marine-Earth Science and Technology(JAMSTEC) cruise and buoy data through an interpolation method. It is found that the cyclonic(anticyclonic) rings presented consistent negative(positive) anomalies of potential temperature;meanwhile the relevant maximum anomaly center became increasingly shallow for the cyclonic rings whereas it went deeper for the anticyclonic rings as the potential temperature anomaly decreased from the west to the east. The above deepening or shoaling trend is associated with the zonal change of the depth of the main thermocline. Moreover, the composite cold ring between 140° and 150°E was found to exhibit a double-core vertical structure due to the existence of mode water with low potential vorticity. Specifically, a relatively large negative(positive) salinity anomaly and a small positive(negative) one appeared for the composite cyclonic(anticyclonic) ring at the depth above and below 600 m, respectively. The underlying driving force for the temperature and salinity anomaly of the composite rings was also attempted, which varies depending on the intensity of the background current and the temperature and salinity fields in different areas of the KE region, and the rings’ influences on the temperature and salinity could reach deeper than 1 000 m on average.
