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一、前言花生是山东的主要农作物之一.在全国也占重要地位.而在小麦、花生、玉米、番薯四种主要作物中,花生是受气象因素(尤其是农业热量因子)影响较显著的作物.东太平洋赤道海区,是大尺度海气相互作用最敏感的海区之一,也是对我国东部天气气候(特别是温度和降水)有显著影响的遥相关区.本文仅以10℃累积温度、气温和花生产量为例,分析了东太平洋赤道海温对我国东部农业影响的可能性,以期得到通过东太平洋赤道海温,研究农业热量和农作物产量变化规律及预报方法的新途径. 相似文献
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By using occanographic data (luring 1955-1978, we have analysed aspects of volume transport variation of the Kuroshio tor PN-linc in the East China Sea, and relationships between volume transport variation of the Kuroshio and the subtropical high pressure (SHP) of the Pacific. We have found that volume transport of the Kuroshio is closely related to the long-period oscillations of the subtropical high pressure for 8-9 years and 2-3 years, respectively. The subtropical high pressure has a phase lag behind compared with volume transport of the Kuroshio. In addition, the seasonal volume transport of the Kuroshio is closely related to the subtropical high pressure, too. The results show that volume transport variation of the Kuroshio has certain influence on future variation of the subtropical high pressure. Therefore, the volume transport of the Kuroshio may be an important parameter lor long-period forecasting of the subtropical high pressure. 相似文献
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采用ＴＯＧＡ／ＣＯＡＲＥ国际合作考察期间（１９９２年１０月─１９９３年２月）获得的２６７次定点（２°Ｓ，１５５°Ｅ）定时高空大气探测资料，进行计算分析，发现１９９２年１２月─１９９３年２月低空存在一支西风急流，有两次分别持续半月之久，而１９９２年１１月的两次赤道西风急流，因无赤道高空急流配合，仅持续２ｄ便消失。本文还指出：（１）赤道低空西风急流是各种海－气指数产生ＥＮＳＯ异常的重要信息；（２）赤道高空急流有滞后赤道低空急流２ｄ左右的响应关系；（３）赤道低空急流是纬向水汽输送的狭窄通道。 相似文献
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1983年11月中美首次在南黄海西部开展水文和地质联合调查,该调查共设5个浮标站和54个CTD站,其中CTD站所获的温、盐度和溶解氧、透光度资料早已有过一些报道,并获得了一些有益的结论(丁宗信等,1986;熊庆成等,1986;赵保仁等,1986)。但对这次调查所取得的浮标测流资料尚未有人进行认真的分析研究,也未曾报道过。这次测流还是比较成功的,所揭示的现象使人感到振奋,而且这也是迄今在南黄海西部使用浮标最多、时间最长的一次浮标阵测流工作。
本文试图结合1983年11月调查时的海上风速和沿岸水位变化进行综合分析,并对那里的环流状态提出一些初步看法,以利于对南黄海西部水域的海流变动特征和生成机制进行更深入的研究。 相似文献
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In this paper, the analysis of net volume of the Kuroshio in PN section of the East China Sea, the calculations of volume transports of the North Equatorial Current (NEC) and North Equatorial Countercurrent (NECC) and the upper layer heat content (0～150 m) in 137°E section during 1967-1992,and the sea surface temperature anomaly (SSTA) in the northern Pacific are illustrated. Meanwhile,the long term variation of subtropical high in northern hemisphere and in the western Pacific, and atmosphere oscillation are also analyzed. By using Mann-Kendall method, the verification shows that the ocean condition and atmospheric circulation system mentioned above all presented "climate transition"during the mid-and late-Stage of 1970's, that is, the volume transports of the Kuroshio, the NEC and the NECC varied from weak to strong; the SSTA changed from the type of La Nina to that of E1 Nino,which were coincident with atmospheric circulation system, i. e. the subtropical high in northern hemisphere and in the western Pacific, and atmospheric oscillation all had the feature of changing from weak to strong, which indicated the response of atmospheric "climate transition" to oceanic "climate transition ". 相似文献
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9005号台风北上时间比常年早，到达位置偏北，造成山东东南沿海暴风雨天气过程，主要影响因素是：西太平洋副热带高压西向脊线偏北；河西－河套地区高空西风环流较平直，利于台风西行－北上。台风路径预报可从太平洋副高西向脊线位置、高空环流形势和台风母休云系长轴方向三个方面综合分析。 相似文献
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山东省地处中纬度,东邻黄、渤海,海岸线北起无隶县大口河,南至日照县绣针河口,全长达3024.4公里。东部山东半岛,突出于黄海和渤海之间,有崑嵛山脉横贯半岛。而内陆则与华北大平原相连接,鲁中有太沂山脉东西绵亘,主峰太山(1545米)为全省最高点。全省山地形势呈西北高、东南低。由于海陆分布和地形特点的影响使得我省大风出现次数频繁,且强度较大,持续时间久,成为我省主要灾害性天气之一。 相似文献