上海及其邻区地震活动与某些“天,地”因子关系初探     

何正檀 《上海国土资源》1991,(2):22-25

本文报导了上海及其邻区M_s≥4 3/4级地震活动与地球自转速率和太阳黑子活动周期有关。据此可望找到该地区地震中期预报的指标。  相似文献   

太阳黑子与全球强震活动   总被引：1，自引：0，他引：1  

方炜  刘春  张春生  邵辉成 《高原地震》2003,15(4):27-31

根据NGDC提供的太阳黑子资料,分析了太阳黑子活动与地球上巨震活动的关系。一般来说,强震发生的平均相位角大致在69 5°～103 7°和256 3°～290 5°之间,在每个太阳黑子活动的双周中,强震容易在黑子活动的峰值出现,而在太阳黑子活动的单周中,强震较易在黑子活动的谷值出现,并指出在今后3～4年内,欧亚大陆发生8级以上巨震的可能性很大。  相似文献   

华东地区大气臭氧总量的变化特点          下载免费PDF全文

洪盛茂 《气象》1997,23(5):44-46

分析了１９９３年１２月至１９９４年１１月的大气臭氧总量资料并与同纬度全球平均值进行比较，分析了大气臭氧总量的年变化、日变化和季节变化。结果表明，臭氧总量的年变化中有双峰特征，它的日变化则以中午时较高，早晚较低；季节变化以春季高，冬季低，与大气透明度的关系较为密切  相似文献   

北方沙尘气溶胶光学厚度和粒子谱的反演   总被引：11，自引：4，他引：11  

刘菲  牛生杰 《南京气象学院学报》2006,29(6):775-781

利用CE-318太阳光度计在内蒙古额济纳旗、东胜、锡林浩特三地观测的2002年6月喇3年5月间的太阳直接辐射数据，应用消光法反演大气气溶胶光学厚度[AOT（λ），Aerosol Optical Thickness]和粒子谱分布，并分析其变化特征。结果表明，该地区气溶胶光学厚度具有明显的时空变化：春季最大，冬季最小，AOT（λ=440nm）平均最大值为0．78，最小值为0．13。3个观测点中，额济纳旗的光学厚度最大，东胜最小。光学厚度的日变化主要有4种形式：1）早晨高傍晚低；2）早晨低傍晚高；3）早晚低中午高；4）变化平缓。这主要与沙尘天气的发生、大气层结稳定度和人类活动等因素有关。气溶胶粒子谱分布基本符合Junge谱，在粒径0．3μm、0．6μm和1．0μm处出现峰值。但是在不同天气条件下粒子谱有很大差异，在沙尘暴天气中，大粒子和巨粒子数有明显的增加，粒子数浓度要比晴天背景大气大了约一个量级。春季气溶胶粒子数浓度最大，夏秋季次之，冬季最小，但相差不超过一个量级。  相似文献   

利用测日实现快速天文定向     

张超  郑勇  孟凡玉 《测绘科学技术学报》2007,24(5):343-345

介绍了天文方位角测量原理,给出了实用的计算太阳视位置的方法;研究了在白天恒星无法应用的情况下,利用电子经纬仪测日进行快速天文定向及方位角测量,给出了具体的实施方法及数据解算过程,并对实际测量数据进行了精度分析.  相似文献   

Probability Distribution of Surface Wave Slope Derived Using Sun Glitter Images from Geostationary Meteorological Satellite and Surface Vector Winds from Scatterometers     

Naoto Ebuchi  Shoichi Kizu 《Journal of Oceanography》2002,58(3):477-486

The probability distribution of the sea surface slope has been estimated using sun glitter images derived from the visible wavelength radiometer on the Geostationary Meteorological Satellite (GMS) and surface vector winds observed by spaceborne scatterometers. The brightness of the visible images is converted to the probability of wave surfaces which reflect the sunlight toward GMS in grids of 0.25° × 0.25° (latitude × longitude). The slope and azimuth angle required for the reflection of the sun's rays toward GMS are calculated for each grid from the geometry of GMS observation and location of the sun. The GMS images are then collocated with surface wind data observed by three scatterometers. Using the collocated data set of about 30 million points obtained in a period of 4 years from 1995 to 1999, the probability distribution function of the surface slope is estimated as a function of wind speed and azimuth angle relative to the wind direction. The results are compared with those of Cox and Munk (1954a). The surface slope estimated by the present method shows a narrower distribution and much less directivity relative to the wind direction than that reported by Cox and Munk. It is expected that their data were obtained under conditions of growing wind waves. In general, wind waves are not always developing, and the slope distribution might differ from the results of Cox and Munk. Most of our data are obtained in the subtropical seas under clear-sky conditions. This difference in the conditions may be the reason for the difference of slope distribution. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

SOLAR-TERRESTRIAL AND CLIMATIC PHENOMENA IN RELATION TO SOLAR INERTIAL MOTION     

I. CHARVÀTOVÀ 《Surveys in Geophysics》1997,18(2-3):131-146

The time series of solar and volcanic activities have been processed to show, mostly by means of statistical characteristics, the exceptional and recurring pattern of these phenomena in the intervals of the exceptional and recurring pattern of solar motion, i.e. in the intervals of the Sun's motion along the trefoils which reoccur in steps of 178.7 years. Nearly the same sets of five sunspot cycles have been found in the latest trefoil intervals (1730–1780 and 1910–1960), their length being constant and equal to 10 years (cycles No. 15–19). The steadily attenuated volcanic activity have been pointed out in the three latest trefoil intervals. The long-term maxima of surface air temperature occured in the central decades of the trefoil intervals. The results indicate a primary role of solar motion in a causal chain of ST-relations and a need of taking the Solar System as a whole into account to explain climatic changes. The solar motion can be computed in advance. Predictive assesments, so far in form of analogies, have been made: Because the solar motion in the next decades will be chaotic, lower and longer solar cycles (with irregular length), ocurrence of huge volcanic events and a decrease of global surface air temperature can be expected.  相似文献   

A Computation on Velocity Field of the Post-flare Loop System of August 17, 1989     

Gu Xiaoma    Dun Jinping  Zhong Shuhua 《天文研究与技术》1999,(Z1)

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Observational Evidence for Solar Radio Microflares with Unusual Characteristics     

Xie R. X.  Wang M. 《天文研究与技术》1999,(Z1)

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The Characteristics of the X-ray Flares (1-8, GOES) of the Different Classes and Their Variations in Two Cycles of Solar Activity     

Sotnikova R. T 《天文研究与技术》1999,(Z1)

1　ＩｎｔｒｏｄｕｃｔｉｏｎＳｏｌａｒｆｌａｒｅｓｒｅｆｌｅｃｔｔｈｅｅｎｅｒｇｅｔｉｃｓｏｆｃｏｒｒｅｓｐｏｎｄｉｎｇｍａｇｎｅｔｉｃｆｉｅｌｄｓ.Ｒｅｓｅａｒｃｈｉｎｇｔｈｅｓｏｌａｒｆｌａｒｅｐａｒａｍｅｔｅｒｓｉｎ 1 1 - ｙｅａｒｓｏｌａｒｃｙｃｌｅｓｃｏｕｌｄｔｈｒｏｗｌｉｇｈｔｏｎｔｈｅｅｎｅｒｇｅｔｉｃｓｏｆｍａｇｎｅｔｉｃｓｔｒｕｃｔｕｒｅｓｆｏｒｍｉｎｇｔｈｅｂａｓｉｓｏｆｔｈｅｃｈｒｏｍｏｓｐｈｅｒｉｃａｎｄｃｏｒｏｎａｌａｃｔｉｖｉｔｙ .Ｔｈｅｖａｒｉａｂｉｌｉｔｙｏｆｔｈｅ…  相似文献