多时刻台风Bogus资料同化对台风"天鹅"的影响     

林芳妮  万齐林  管兆勇 《热带气象学报》2011,27(2):230-236

基于GRAPES(Global/Regional Assimilation and Predition System)三维变分同化系统,设计在6小时内分别应用三小时一次和逐小时的台风定位和定强信息对台风进行多次BDA(Bogus Data Assimilation)同化,在多次BDA中只同化近似程度高的涡旋风分量而近似...  相似文献   

OBSERVATIONAL STUDY ON THE PRE-TROPICAL CYCLONE SQUALL LINE OF 8 AUGUST 2007 OVER THE COAST OF SOUTH CHINA     

郑腾飞  黄健  万齐林  刘显通  于鑫 《热带气象学报(英文版)》2016,22(4):508-521

A squall line in front of the tropical cyclone Pabuk occurred in the west of the Pearl River Delta to Zhanjiang on August 8th, 2007 when the storm approached South China. The development, structure and environmental conditions for this squall line were investigated in this study, with particular attention paid to the possible connection of this squall line with Pabuk. The observational data employed in this study are from soundings, Doppler weather radars and wind profile radars. The following six major conclusions are drawn by our observational analyses. (1) This squall line developed gradually from individual convective cells, and land breeze may be responsible for the onset of the squall line. (2) The path and intensity of the squall line were modulated by the environmental conditions. The squall line propagated along the coastline, and it was stronger on the landing side of the coastline compared with the surrounding in-land regions and oceanic regions. (3) The typical characteristics of tropical squall lines were seen in this squall line, including the cold-pool intensity, vertical structure and the wake flow stratiform precipitation at its developing and mature phases. (4) The environmental conditions of this squall line resemble those of tropical squall lines in terms of deep moist air and low convection condensation level. They also resemble mid-latitude squall lines in terms of the convective instable energy and vertical wind shear in the lower troposphere. (5) Two roles were played by the strong wind around Pabuk. On the one hand, it made the atmosphere more unstable via suppressed shallow convection and increased solar radiation. On the other hand, it enhanced the land-sea thermal contrast and therefore strengthened the sea breeze and the resultant water vapor transport. The sinking temperature inversion prevented the occurrence of low-layer weak convection and accumulated convection instability energy for the development of the strong convection.  相似文献   

注浆法在填土地基加固处理中的应用实例     

谢福和  彭溅清  万建文 《国土资源导刊(湖南)》2001,20(2):123-125

泸溪县武溪110 kv变电站场地地基为人工开挖山坡堆填而成,填土厚薄不均,由块石、碎石及粉土构成.变电站建成后,建筑物及地面发生不均匀沉降,建设方要求进行加固处理.经过反复对比和投资验算,确定采用充填、渗透注浆法对填土地基注入浓水泥浆进行加固处理.施工前,先要进行注浆试验,选择合理的注浆方式和技术参数.注浆加固后,通过一年多的观察,建筑物及地面不均匀沉降均得到控制,达到了提高地基承载力,稳定建筑物的目的.  相似文献   

矿业秩序,治你没商量--华蓥市整治规范矿业秩序纪实     

邱海鹰  柏松万  江显兵  兰勇 《国土资源》2005,(11):32-32

近年来,全国各地不断发生的矿难,弄得国人心存余悸,弄得各级地方政府寝食难安.特别是今年以来广东、广西、四川等地发生的特大矿难,更是搞得人们谈矿色变.  相似文献   

泡沫的携带性能     

С.  НИ 万希岭 《地质科学译丛》1996,13(3):92-96

研究泡沫的携带性能，对于清洗钻孔，提高钻进效率是十分重要的。泡沫携带能力的大小取决于球状颗粒在液流中的临界速度。利用专用试验台确定球状颗粒降临速度是较合理较可靠的方法。研究结果表明，球状颗粒临界速度随泡沫流中气体含量的增加而增大。  相似文献   

射电源0420—014,1334—127和2345—167中的视超光速运动   总被引：2，自引：1，他引：1  

沈志强  万同山 《天体物理学报》1997,17(1):8-12

本文叙述南天区５ＧＨｚＶＬＢＩ普查中新发现的视超光速射电源，０４２０－０１４，１３３４－１２７和２３４５－１６７，这些结果尚待进一步的观测加以证实。  相似文献   

关于大比例尺测图平面控制测量的几点联想     

杨按万 《东北测绘》1998,21(1):40-40

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GPS接收机的使用与维护保养     

丁翔宇  赵世万  DING Xiang-yu  ZHAO Shi-wan 《测绘通报》2000

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1993年皮尔戈斯（希腊）地震的震源机制和土层效应     

Bouck.  G 万迪坤 《世界地震译丛》1996,(6):40-43

引言 1993年3月26日,一次中等强度的M_S=5.5的地震发生在希腊南部伯罗奔尼撒半岛的皮尔戈斯市以南3 km处,震源深度15 km。包括前震和余震在内的地震活动性的特征,就其延续时间超过一个月和其活动范围遍及该市周围15 km半径范围  相似文献   

铝土矿中测定Al2O3的几种方法比较     

万琼华 《贵州地质实验》1992,(21):30-35

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