为了研究中国西北半干旱区卷云几何特征和光学特性的时空分布特征,利用兰州大学半干旱气候与环境观测站(SACOL,35°57′N,104°8′E)的微脉冲激光雷达(MPL-4B)探测卷云过程,分析讨论了卷云的结构、光学性质及其时间变化特征,结果表明,卷云高度分布范围为7～10 km,卷云经历了薄-厚-薄的过程,平均厚度为(2.0±0.5) km.卷云环境温度在-51℃～-39℃范围之内.卷云的光学厚度在0.084～1.649之间,光学厚度随几何厚度的增加而增大,平均光学厚度为0.651±0.403.卷云激光雷达比为(17士17) sr.薄卷云的激光雷达比要比厚卷云的大.光学厚度小于0.3的光学薄卷云出现高度在8.6 km以上,环境温度低于-45°℃,几何厚度小于1.8 km,雷达比分布在5～69 sr.
参考文献
| [1] | Heymsfield A J,McFarquhar G M.Mid-latitude and Tropical Cirrus[M].New York:Oxford Univ.Press,2002:78,101. |
| [2] | Liou K N.Influence of cirrus clouds on weather and climate processes:a global perspective[J].Mon.Weather Rev.,1986,114:1167-1199. |
| [3] | Twomey S.Aerosols,clouds and radiation[J].Atmos.Environ.,1991,25:2435-2442. |
| [4] | McFarquhar G M,Heymsfield A J,Spinhirne J D,et al.Thin and subvisual tropopause tropical cirrus:observations and radiative impacts[J].J.Atmos.Sci.,2000,57:1841-1853. |
| [5] | Baker B M.Cloud microphysics and climate[J].Science,1997,276:1072-1078. |
| [6] | Ramanathan V,Collins W.Thermodynamic regulation of ocean warming by cirrus clouds deduced from observations of the 1987 El Ni(n)io[J].Nature,1991,351:27-32. |
| [7] | Spinhirne J D.Micropluse lidar[J].IEEE Trans.Geosc.Rem.Sens.,1993,31(1):48-54. |
| [8] | Sassen K,Cho B S.Subvisible-thin cirrus lidar dataset for satellite verification and climatological research[J].J.Appl.Mete.,1992,31:1275-1285. |
| [9] | Reichardt J.Optical and geometrical properties of northern midlatitude cirrus clouds observedwith a UV Raman lidar[J].Phys.Chem.Earth,Part B,1999,24:255-260. |
| [10] | Giannakaki E,Balis D S,Amiridis V,et al.Optical and geometrical characteristics of cirrus clouds over a southern European lidar station[J].Atmos.Chem.Phys.,2007,7:5519-5530. |
| [11] | Xue Xinlian,Qi Fudi,Fan Aiyuan,et al..Lidar observations of cirrus clouds over Hefei[J].Chinese Journal of Quantum Electronics(量子电子学报),2006,23(4):527-532 (in Chinese). |
| [12] | Platt C M,Young S A,Carswell A I,et al.The experimental cloud lidar pilot study (ECLIPS) for cloud-radiation research[J].Bull.Amer.Meteor.Soc.,1994,75:1635-1654. |
| [13] | Klett J D.Stable analytical inversion solution for processing lidar returns[J].Appl.Opt.,1981,20:211-220. |
| [14] | Fernald F G.Analysis of atmospheric lidar observations:Some comment[J].Appl.Opt.,1984,23(5):652-653. |
| [15] | Platt C M R.Lidar and radiometric observation of cirrus clouds[J].J.Atmos.Sci.,1973,30:1191-1204. |
| [16] | Young S A.Analysis of lidar backscatter profiles in optically thin clouds[J].Appl.Opt.,1995,34:7019-7031. |
| [17] | Chen W N,Chiang C W,Nee J B.Lidar ratio and depolarization ratio for cirrus clouds[J].Appl.Opt.,2002,41:6470-6476. |
| [18] | Xue Xinlian,Qi Fudi,Fan Aiyuan,et al.A method to determine lidar ratio in high-altitude thin cirrus[J].Chinese Journal ofQuantum Electronics(量子电子学报),2006,23(1):115-119(in Chinese). |
| [19] | Wang X,Boselli A,Avino L D,et al.An algorithm to determine cirrus properties from analysis of multiplescattering influence on lidar signals[J].Appl.Phys.B,2005,80:609-615. |
| [20] | Platt C M R,Dilley A C.Remote sounding of high clouds.Ⅳ:Observed temperature variations in cirrus optical properties[J].J.Atmos.Sci.,1981,38:1069-1082. |
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