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不同DEM数据对卫星遥感影像纠正精度的影响 总被引:6,自引:0,他引:6
从生产的实际工作出发,利用SPOT卫星影像为影像资料源,对卫星遥感影像的纠正方法进行对比试验,研究不同DEM数据对卫星遥感影像纠正精度的影响并对实际工作提供建议。 相似文献
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AN ANALYSIS OF THE CHARACTERISTICS OF EQUATORIAL WESTERLIES 总被引:1,自引:0,他引:1
The real-time data of the high level atmosphere obtained by the R/V Xiangyanghong No.5 involved in the international TOGA-COARE project at 2°S, 155°E and at fixed real time of 05, 11, 19 and 23 h GMT each day from Nov. 5, 1992 to Feb. 18, 1993 are used to analyze diagnostically the vertical structure of wind and humidity over the central area of the warm pool. The results show that (1) the lowfrequency oscillation of the equatorial westerlies (i. e. reconstruction-development-decline) is closely related to the vigour and interruption of the Asian-Australian monsoon (including air flow across the equator caused by East Asia cold wave), (2) the variabilities of the vertical structure of wind and humidity, and the processes of precipitation and gale weather in the troposphere of the warm pool area are closely related to the intensity of the equatorial westerlies, and (3) there are strong wind belts over the high and low level atmosphere in the western equatorial Pacific at the inception of the ENSO event, and jet flow at the high and low level atmosphere during the equatorial westerly burst. 相似文献
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我国东北地区,特别是黑龙江省,无霜期短,温度对农业的影响很显著。夏季低温(下文简称低温)可以造成农业大幅度减产,在1955—1981年间,发生过五次低温冷害过程,使整个东北地区粮食大幅度减产。 相似文献
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李若钝 《海洋学报(英文版)》1985,4(4):548-556
In this paper the relationship between the variation of shrimp resources (which is sensitive to the sea temperature of the Huanghai and Bohai Seas) and the equatorial sea surface temperature is analysed, the results obtained showing high correlation between the two. Therefore, a new approach to studying long-term variational law of fishery resources and forecasting method is made through large-scale air-sea interaction. 相似文献
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本文通过对热带海洋非埃尔-尼诺时期海温场的一种重要分布形式——海温场EOF展开第一特征向量场与高低空大气的相关分析和谱分析发现,该类海温分布典型场不仅对高空大气的起伏振荡有重要影响。而且与低空大气的涛动现象关系密切,其变化领先于低纬涛动现象4~5个月,可能是低纬涛动现象的启动因子。 相似文献
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This paper analyses the sea surface temperature (SST) of the eastern Pacific Ocean, the Kuroshio in the East China Sea, the subtropical high pressure of the Pacific Ocean and the precipitation for rainy season of Qingdao. We obtain a result that if this year the eastern Pacific Equatorial Zone is a warm-water year, the Kuroshio path in the East China Sea for next year will be subject to oscillation westward. The SST of the eastern Pacific Ocean may predict precipitation for rainy season of Qingdao one year earlier than that of the Kuroshio in the East China Sea. 相似文献
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利用我国及美国国家气象局提供的热带太平洋月平均海温、水位、地球向处长波辐射和850hPa纬向风资料,对1980年以来的三次厄尔尼诺事件迁长原因及其特征作一分析的探讨。文章指出,El Nino事件延长的原因主要是:在El Nino事件发生后,热带太平洋在所环流半年左右的韵律活动及在赤道南、北两侧明显的大气振荡加强,从而使大气的El Nino异常过程间隔半年相继发生。 相似文献