气象学报
氣象學報
기상학보
ACTA METEOROLOGICA SINICA
2014年
5期
1039-1053
,共15页
云参数%双光谱反射率算法%气溶胶%降水
雲參數%雙光譜反射率算法%氣溶膠%降水
운삼수%쌍광보반사솔산법%기용효%강수
Cloud parameters%Bispectral reflectance method%Aerosol%Precipitation
云参数特征既是天气模式和云模式中云过程描述的依据,也是人工影响天气、云辐射气候效应、气溶胶-云-降水相互作用等研究的理论与应用基础。在目前的科技水平下,人类还难以获得大范围云内云参数特征信息,但仍可充分利用卫星光谱遥感探测结果,从反演获得的云顶附近云参数入手,逐步推进对全球云特性的认识。首先介绍了云参数的双光谱反射率算法原理及其发展算法,然后介绍了利用云参数研究气溶胶的间接效应问题,最后重点阐述了基于卫星测雨雷达与光谱逐日逐轨探测信号的融合数据,结合云参数双光谱反射率反演算法,对云参数与降水强度、类型及结构关系的研究,指出云顶附近的云粒子尺度及云水路径可以很好地指示对流降水云团的厚度及强度,并指出了内陆和洋面水云及非水云降水的云参数与其降水强度关系的差异。
雲參數特徵既是天氣模式和雲模式中雲過程描述的依據,也是人工影響天氣、雲輻射氣候效應、氣溶膠-雲-降水相互作用等研究的理論與應用基礎。在目前的科技水平下,人類還難以穫得大範圍雲內雲參數特徵信息,但仍可充分利用衛星光譜遙感探測結果,從反縯穫得的雲頂附近雲參數入手,逐步推進對全毬雲特性的認識。首先介紹瞭雲參數的雙光譜反射率算法原理及其髮展算法,然後介紹瞭利用雲參數研究氣溶膠的間接效應問題,最後重點闡述瞭基于衛星測雨雷達與光譜逐日逐軌探測信號的融閤數據,結閤雲參數雙光譜反射率反縯算法,對雲參數與降水彊度、類型及結構關繫的研究,指齣雲頂附近的雲粒子呎度及雲水路徑可以很好地指示對流降水雲糰的厚度及彊度,併指齣瞭內陸和洋麵水雲及非水雲降水的雲參數與其降水彊度關繫的差異。
운삼수특정기시천기모식화운모식중운과정묘술적의거,야시인공영향천기、운복사기후효응、기용효-운-강수상호작용등연구적이론여응용기출。재목전적과기수평하,인류환난이획득대범위운내운삼수특정신식,단잉가충분이용위성광보요감탐측결과,종반연획득적운정부근운삼수입수,축보추진대전구운특성적인식。수선개소료운삼수적쌍광보반사솔산법원리급기발전산법,연후개소료이용운삼수연구기용효적간접효응문제,최후중점천술료기우위성측우뢰체여광보축일축궤탐측신호적융합수거,결합운삼수쌍광보반사솔반연산법,대운삼수여강수강도、류형급결구관계적연구,지출운정부근적운입자척도급운수로경가이흔호지지시대류강수운단적후도급강도,병지출료내륙화양면수운급비수운강수적운삼수여기강수강도관계적차이。
Retrieval of cloud parameters is fundamental for descriptions of the cloud process in weather and cloud models,and is also the base for theoretical and applicational investigations on weather modification,aerosol-cloud-precipitation interaction, cloud-radiative climate effects,and so on.However,it is still difficult to obtain full information of cloud parameters over a wide area under the current level of science and technology.Luckily,parameters at the top of clouds can be retrieved with the satel-lite spectrum remote sensing,which is useful in obtaining global cloud properties.In this paper,cloud parameters retrieved by the bispectral reflectance (BSR)method and other methods developed on the basis of the BSR are briefly summarized.Recent advances in studies on the indirect effects of aerosol on cloud parameters are reviewed.The relationships among cloud parame-ters and precipitation intensity,type,and structure are elaborated on,based upon the pixel-level merged datasets derived from daily measurements of precipitation radar and visible and infrared scanner,together with cloud parameters retrieved by the BSR.It is revealed that cloud particle effective radius and liquid water path near cloud tops are effective to identify the thickness and intensity of convective precipitating clouds.Furthermore,the differences in cloud parameters and precipitation intensity for precipitating and non-precipitating clouds over land and ocean are compared in this paper.