印尼贯穿流源区马鲁古海与哈马黑拉海水团来源的季节和年际变化   总被引：2，自引：1，他引：1  

王露  周磊  谢玲玲  郑全安  李强  李明明 《海洋学报(英文版)》2019,38(4):58-71

So far, large uncertainties of the Indonesian throughflow(ITF) reside in the eastern Indonesian seas, such as the Maluku Sea and the Halmahera Sea. In this study, the water sources of the Maluku Sea and the Halmahera Sea are diagnosed at seasonal and interannual timescales and at different vertical layers, using the state-of-the-art simulations of the Ocean General Circulation Model(OGCM) for Earth Simulator(OFES). Asian monsoon leaves clear seasonal footprints on the eastern Indonesian seas. Consequently, the subsurface waters(around 24.5σ_θ and at ～150 m) in both the Maluku Sea and the Halmahera Sea stem from the South Pacific(SP) during winter monsoon, but during summer monsoon the Maluku Sea is from the North Pacific(NP), and the Halmahera Sea is a mixture of waters originating from the NP and the SP. The monsoon impact decreases with depth, so that in the Maluku Sea, the intermediate water(around 26.8σ_θ and at ～480 m) is always from the northern Banda Sea and the Halmahera Sea water is mainly from the SP in winter and the Banda Sea in summer. The deep waters(around27.2σ_θ and at ～1 040 m) in both seas are from the SP, with weak seasonal variability. At the interannual timescale,the subsurface water in the Maluku Sea originates from the NP/SP during El Ni?o/La Ni?a, while the subsurface water in the Halmahera Sea always originates from the SP. Similar to the seasonal variability, the intermediate water in Maluku Sea mainly comes from the Banda Sea and the Halmahera Sea always originates from the SP. The deep waters in both seas are from the SP. Our findings are helpful for drawing a comprehensive picture of the water properties in the Indonesian seas and will contribute to a better understanding of the ocean-atmosphere interaction over the maritime continent.  相似文献   

基于多模式交通网络的开封市公园景点可达性     

郑智成  张丽君  秦耀辰  王霞  张晶飞  于燕 《地域研究与开发》2019,38(4)

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大连贺家圈黄土粒度所指示的物源特征     

郑树森  李永化  魏东岚 《云南地理环境研究》2020,(1):41-47

基于大连长兴岛的一套完整的晚更新世黄土剖面(贺家圈剖面),应用端元分析模型,对所采集的21个沉积样品的粒度数据进行分析。结论认为:从贺家圈剖面沉积物粒级组分中可以分离出3个代表不同沉积动力以及改造作用的沉积端元组分。并结合地球化学元素的对比分析,初步认为:端元1可能代表了剖面原始的粒度沉积组分,主峰为近源沉积,次峰为远源沉积;端元2可能代表了沉积物在沉积之后受到的淋溶作用和残积作用;端元3可能代表的是沉积物沉积之后受到的化学风化作用。  相似文献   

白令海峡区域太平洋入流水主要特征及其影响因素研究进展          下载免费PDF全文

张瑜  邓永飞  陈长胜 《极地研究》2020,32(2):151-163

作为北极海洋要素的重要来源之一,白令海峡区域的太平洋入流水在北冰洋表层海洋环流和物质能量输运过程中发挥着重要作用,对区域乃至全球气候和生态系统产生深远影响,然而现今的研究对太平洋入流水出现的新变化以及其如何参与北冰洋的海洋–大气过程了解得还不够深入。本文梳理了目前国内外有关太平洋入流水流量、环流与水团等主要特征的相关研究进展,总结了太平洋入流水的流量变化和驱动机制、环流路径和影响因素,以及与太平洋水有关的水团特征,并在前人研究的基础上对未来的研究方向予以展望。  相似文献   

电针联合重复经颅磁刺激治疗亚健康失眠34例临床观察          下载免费PDF全文

陈婷 《应用海洋学学报》2018,34(10):81-84

目的：观察电针联合重复经颅磁刺激治疗亚健康失眠（肝郁气滞型）的临床疗效。方法：将亚健康失眠（肝郁气滞型）患者68例随机分为治疗组和对照组各34例。治疗组采用电针联合重复经颅磁刺激治疗，对照组口服艾司唑仑治疗。观察2组临床疗效及匹兹堡睡眠质量指数（PSQI）评分、焦虑抑郁量表（SAS、SDS）评分改善情况。结果：总有效率治疗组为91.18%，对照组为85.29%，2组比较，差异有统计学意义（P<0.05）；2组PSQI各项指标评分治疗前后组内比较，差异均有统计学意义（P＜0.05）；PSQI总分及睡眠质量、入睡时间、睡眠效率、日间功能障碍4个项目评分治疗后组间比较，差异均有统计学意义（P<0.05）；2组SAS、SDS评分治疗前后组内比较及治疗后组间比较，差异均有统计学意义（P<0.05）。结论：电针联合重复经颅磁刺激治疗亚健康失眠（肝郁气滞型）有明显疗效，且对情志有明显调节作用。  相似文献   

基于问题式教学的地理核心素养 的培养与反思 ——以人教版"气压带与风带"一节为例     

董满超 《地理教学》2019,(4)

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冰冻圈服务综合区划理论与方法     

林浩曦  黄金川  效存德  漆潇潇  陈云谦 《地理学报》2020,75(3):631-646

冰冻圈是全球气候系统的主要圈层之一,既具有不可替代的气候效应,又维系着寒旱地区社会经济和自然生态系统良好运行,而中国是中低纬度地区冰川、积雪、冻土发育程度最高的国家。长期以来,针对冰冻圈“致害性”的研究众多,而聚焦冰冻圈服务的“致利性”研究则相对滞后,在此背景下着眼于人类福祉的冰冻圈服务识别与综合区划研究成为冰冻圈科学、人地系统可持续发展等的关键科学问题之一,也是目前迫切需要开展的研究方向。首先,确定以地域分异规律理论、人地关系地域系统理论、集合论和信息编码论等跨学科理论为研究基础;尔后,构建面向综合区划研究的冰冻圈服务分类体系,先以供需均衡模型为核心进行单项服务重要性空间识别,再以服务最大化模型为指导,通过区位熵算法判定冰冻圈主导服务的空间分布;最后,以三维魔方展开法为核心制定冰冻圈服务综合区划方案,将研究区划分多重空间层级、彼此独立完整、相互联系密切的冰冻圈服务单元。综上,形成综合自然供给和人文需求因素且适应地区特色的冰冻圈服务空间识别与综合区划技术体系和方法流程,为冰冻圈服务供给与社会经济发展需要架起一座桥梁,是满足国家重大战略需求和合理利用冰冻圈服务的必由之路。  相似文献   

2017年春季季风间期南海中北部浮游植物生长与微型浮游动物摄食     

陈大伟  郭聪聪  余凌晖  鲁远征  孙军 《海洋学报(英文版)》2020,39(6):84-95

Phytoplankton growth rates and mortality rates were experimentally examined at 21 stations during the 2017 spring intermonsoon(April to early May) in the northern and central South China Sea(SCS) using the dilution technique, with emphasis on a comparison between the northern and central SCS areas which had different environmental factors. There had been higher temperature but lower nutrients and chlorophyll a concentrations in the central SCS than those in the northern SCS. The mean rates of phytoplankton growth(μ_0) and microzooplankton grazing(m) were(0.88±0.33) d~(–1) and(0.55±0.22) d~(–1) in the central SCS, and both higher than those in the northern SCS with the values of μ_0((0.81±0.16) d~(–1)) and m((0.30±0.09) d~(–1)), respectively.Phytoplankton growth and microzooplankton grazing rates were significantly coupled in both areas. The microzooplankton grazing impact(m/μ_0) on phytoplankton was also higher in the central SCS(0.63±0.12) than that in the northern SCS(0.37±0.06). The microzooplankton abundance was significantly correlated with temperature in the surface. Temperature might more effectively promote the microzooplankton grazing rate than phytoplankton growth rate, which might contribute to higher m and m/μ_0 in the central SCS. Compared with temperature, nutrients mainly affected the growth rate of phytoplankton. In the nutrient enrichment treatment,the phytoplankton growth rate(μn) was higher than μ_0 in the central SCS, suggesting phytoplankton growth in the central SCS was nutrient limited. The ratio of μ_0/μn was significantly correlated with nutrients concentrations in the both areas, indicating the limitation of nutrients was related to the concentrations of background nutrients in the study stations.  相似文献   

潮汐和风对马六甲海峡海流的影响     

范锦晓  胡松 《热带海洋学报》2020,39(4):13-24

基于非结构有限体积法海洋模型FVCOM(Finite-Volume Community Ocean Model), 建立了马六甲海峡及其毗邻海域高分辨率水动力数值模型, 研究了风和潮流作用下的余环流结构以及水体输运特征。结果表明, 马六甲海峡航道中央潮流运动以往复流为主, 边缘存在旋转流; 主要研究区域内落潮流速略大于涨潮流速, 东南窄道处流速最大; 因峡道束窄变浅, 在涨落潮过程中潮流发生汇聚与分离; 主要研究区域东南段存在3个显著的潮致余环流; 东北季风驱动时模型响应为海峡海流整体向西北方向流动, 西南季风时反之; 季风期间潮致表层余环流结构被破坏, 但底层余流仍存在水平环流结构, 且随着风速增加, 底层余环流的数目、大小、形状、位置均会产生变化; 季风过渡期余环流结构也会发生部分改变, 尤其是小潮期间风场影响效果显著。  相似文献   

南海与周边海域表层塑料颗粒交换的拉格朗日示踪研究     

孟钊  李宁  管玉平  冯洋 《热带海洋学报》2020,39(5):109-116

塑料污染已成为国际海洋界关注的海洋环境问题之一。文章探讨海洋环流对南海及其周边海域表层塑料颗粒交换的影响。在南海周边多个海域, 分别在4个季节投放塑料颗粒。一年后, 用拉格朗日颗粒示踪方法考察投放颗粒的运动轨迹和最终停留位置。结果表明, 在秋、冬季, 大部分塑料颗粒会进入南海和爪哇海, 极少部分颗粒北输送到太平洋; 在春、夏季, 仅有部分颗粒进入南海和爪哇海, 而多数颗粒流到太平洋。南海洋流具有季节特征, 塑料颗粒轨迹特征与之较为符合。  相似文献