EFFECTS OF ANOMALOUS HEATING ON SUMMER MONSOON OVER ASIA^*     

Shen Rujin  Ji Liren 《Acta Meteorologica Sinica》1991,5(5):564-576

Based on a zonally non-uniform mean circulation in summer simulated by numerical modelling,perturbation heatings ever South Asia and a perturbation cooling over Northwest Australia were incorporated in a numerical model to discuss their effects on summer monsoon over Asia and the structure of flow disturbance.  相似文献   

金沙江地震带强震动及其与现今弱震活动关系   总被引：2，自引：0，他引：2  

廖志和 《四川地震》1994,(4):13-24

包括川滇菱块及马边－大关，宣威－弥勒地区在内的金沙江地震带记载（录）了川滇两省发生的绝大部分中、强以上地震，为我国西南一主要地震区。本文重点研究了该范围内强震的重复性及现今弱震密集区的强震危险性问题。金沙江地震带强震具有很高的原地重复性，７级以上强震原地重复率达６５．４％，平均复发时间１５７年；６级地震原地重复率达４１．８％，平均复发时间为２７．２年。川滇地区现今弱震活动密集区在活动期内本身发生６级以上强震的可能性很小。四川地区大多数情况下强震发生在距密集区４０－５０千米处，云南情况较复杂。但在作今后较长时间危险性分析预测时，现今弱震密集区本身仍有发生６级地震的危险，虽然发生７级以上地震可能性不大。  相似文献   

苏北平原井下摆观测效果的讨论     

徐元耀 《地震地磁观测与研究》1994,15(6):31-35

文章以江苏省大丰台、盐城台、淮阴台、海安台，射阳台井下摆观测为例。比较它们的观测结果，分析认为井下摆的观测效果不仅与地面复盖层的厚度有关，而且与井下摆周围的环境干扰，观测用井的质量有关。为了提高井下摆观测效果，应尽量减少环境干扰，并注意井的垂直度和固井，文章还指出，沿海地区井下摆受海浪干扰相当显著的。  相似文献   

大气有机污染分析和评价I．采样方法及采样误差     

郎庆勇 《岩矿测试》1994,(3)

对近１０年来国外有关大气污染物的采样方法、有机污染物在气、固相中的分配以及采样误差的主要文献做了简要回顾。对不同采样器的采样效率、误差来源及误差校正方法进行了讨论。列举了一些富有指导意义的研究成果和结论。可以看出，在消除或限制了采样误差后，所得分析结果为客观评价环境污染问题提供了更可靠的依据。  相似文献   

伊朗卡尔赫水电站坝址松散砾岩钻探工艺          下载免费PDF全文

路殿忠 《探矿工程》1994,(3):30-31

在伊朗卡尔赫水电站坝址工程勘察中，采用金刚石双管单动钻具和ＳＭ胶冲洗液进行取样钻探，用清水钻进压水试验，由于钻探工艺合理，钻探质量均达到了设计要求。  相似文献   

NOAA WP-3D instrumentation and flight operations on AGASP-II     

R. C. Schnell  T. B. Watson  B. A. Bodhaine 《Journal of Atmospheric Chemistry》1989,9(1-3):3-16

The second Arctic Gas and Aerosol Sampling Program (AGASP-II) was conducted across the non-Soviet Arctic in March and April 1986, to study the aerosol, gaseous, chemical, and optical properties of Arctic haze. One component of the program was supported with an instrumented NOAA WP-3D atmospheric research aircraft. Measurements of wind, temperature, ozone, water vapor, condensation nucleus concentration, and aerosol scattering extinction coefficient were used to determine the locations and properties of haze layers. The first three NOAA WP-3D research flights were conducted north of Barrow, Alaska, and over the Beaufort Sea northeast of Barter Island, Alaska. The next three sampled conditions in the high Arctic near Alert, Northwest Territories, Canada. All basic meteorological, gas, and aerosol systems are described. The WP-3D flight tracks and operations are presented.  相似文献   

航摄底片信息容量的确定     

宣家斌  S.A.Hempenius 《武汉大学学报(信息科学版)》1986,(4)

为了定量地分析航摄底片的信息容量,本文在影象数字化的基础上,从理论上分析信息容量的估算公式,监重点研究用“比特分割”的方法确定其有效的比特数。  相似文献   

安太堡露天煤矿排土场基底黄土的微结构演化与弱层的形成机理          下载免费PDF全文

陈敏 《地质论评》1995,41(6):571-576

本文根据安太堡露天煤矿排土场基底黄土的粘土矿物组成的微结构及其在分级荷载下微结构变化的研究，论述了排土场基底黄土内弱层的形成机理，提出弱层是在上覆排土压力下由于黄土的微结构变化而形成的演化弱层。并指出弱层的形成是导致排土场失稳滑坡的主要控制因素，这种弱层在新排土场设计时期并不存在，极具隐蔽性，但在设计时必须考虑在排土增至一定高度后，弱层的形成对排土场稳定性的影响，否则必将会存在重大滑坡隐患。  相似文献   

The tropospheric distribution of formaldehyde during TROPOZ II     

D. W. Arlander  D. Brüning  U. Schmidt  D. H. Ehhalt 《Journal of Atmospheric Chemistry》1995,22(3):251-269

A series of 149 measurements of the HCHO mixing ratio were made between 0 and 10 km altitude and 70° N to 60° S latitude during TROPOZ II. The data show a vertical decrease of the HCHO mixing ratio with altitude at all latitudes and a broad latitudinal maximum in the HCHO mixing ratio between 30° N and 30° S at all altitudes. The measured mixing ratios of HCHO are considerably higher than those expected from CH₄ oxidation alone, but agree broadly with the average latitude by altitude distribution of HCHO derived by a 2D model including emissions of C₁–C₇ hydrocarbons. A number of the regional scale deviations of the measured HCHO distribution from the average modelled one can be explained in terms of the local wind field.  相似文献   

Field survey of the East Java earthquake and tsunami of June 3, 1994     

Yoshinobu Tsuji  Fumihiko Imamura  Hideo Matsutomi  Costas E. Synolakis  Puspito T. Nanang  Jumadi  Satoshi Harada  Se Sub Han  Ken'ichi Arai  Benjamin Cook 《Pure and Applied Geophysics》1995,144(3-4):839-854

A field survey of the June 3, 1994 East Java earthquake tsunami was conducted within three weeks, and the distributions of the seismic intensities, tsunami heights, and human and house damages were surveyed. The seismic intensities on the south coasts of Java and Bali Islands were small for an earthquake with magnitudeM 7.6. The earthquake caused no land damage. About 40 minutes after the main shock, a huge tsunami attacked the coasts, several villages in East Java Province were damaged severely, and 223 persons perished. At Pancer Village about 70 percent of the houses were swept away and 121 persons were killed by the tsunami. The relationship between tsunami heights and distances from the source shows that the Hatori's tsunami magnitude wasm=3, which seems to be larger for the earthquake magnitude. But we should not consider this an extraordinary event because it was pointed out byHatori (1994) that the magnitudes of tsunamis in the Indonesia-Philippine region generally exceed 1–2 grade larger than those of other regions.  相似文献