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12、雷达回波中提取出的反应降水系统状态的三个基本量是反射率因子、___和径向速度谱宽。
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答案
平均径向速度
解析
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13、新一代天气雷达是多普勒天气雷达,它除了测量回波强度外,还可以测量降水目标物沿雷达波段径向的___和速度谱宽。
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14、风暴运动可以从雷达回波图上获得,通常情况下,当环境为强气流所控制时,风暴运动主要取决于___,而当对流层环境风场较弱时,传播对于风暴运动起着主导作用。
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15、天气雷达的主要局限性有三个:一是波束中心的高度随距离的增加而增加,二是波束宽度随距离的___而展宽,三是静锥区的存在。
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16、预警信号分为台风、___、暴雪、寒潮、___、沙尘暴、高温、干旱、___、冰雹、霜冻、大雾、霾、___等。
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18、 气象灾害预警信号是指各级气象主管机构所属的气象台站向社会公众发布的预警信息。 预警信号由___、___、标准和防御指南组成。
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19 、预警信号的级别依据气象灾害可能造成的危害程度、紧急程度和发展态势一般划分为四级:Ⅳ级___、Ⅲ级___、Ⅱ级___、Ⅰ级___,依次用___、___、___和红色表示,同时以中英文标识。
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9. 国家气象中心负责确定已编号的热带气旋的中心位置。在编号热带气旋未进入国家气象中心的警报发布区之前,每天进行4次定位;当进入国家气象中心的警报发布区后,每天进行___次定位;当进入24小时警戒线后,每天进行___定位。
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18.精细天气预报对气象及相关灾害预报而言,就是短期预报要明确灾害性天气 ___,短时和临近预报要明确灾害性天气出现的___。
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21. 精细天气预报检验要求,对温度预报检验___;对各类气象及相关灾害预报检验___ ) 。
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22.自2006年4月1日6:00___起,全国县级以上城镇天气预报在传输72小时预报的基础上,增加传输___小时预报。
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23.全国城镇天气预报每天传输2次:早晨编发08时-08时天气预报,GG编为___;下午编发20时-20时天气预报,GG编为___。
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24. 流域面雨量预报是一项十分重要的气象业务工作,它既是各级政府组织防汛抗洪以及水库调度等决策的重要依据,又是洪水预报非常重要的___。
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26. 面雨量是指某一时段内一定面积上的平均雨量。全国七大江河流域面雨量计算统一采用___。
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1、支配大气中各种运动的基本方程有:___、___和热力学能量方程。
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2、根据锋在移动过程中冷、暖气团所占的主、次地位可将锋分为:冷锋、暖锋、___和___。
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3、根据气旋形成及热力结构,气旋可以分为___和___两大类。
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4、某一地区降水形成,大致有三个过程。首先是水汽由源地水平输送到降水地区,叫做___条件。其次是水汽在降水地区辐合上升,在上升中膨胀冷却并凝结成云,叫做___的条件。最后是云滴增长变为雨滴而下降,叫做云滴增长的条件。
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5、急流轴的左侧风速具有___性切变,右侧具有___性切变。
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