CAJ | 학술논문

卷云中冰晶粒子的单次光散射计算是卷云辐射传输及云微物理参数反演的重要基础。近年，利用高观测频率的静止气象卫星数据来反演水云和卷云的光学和微物理参数，进而计算地表光通量的研究倍受重视。然而，很多研究中卷云的冰晶用球形模型来模拟。由于不同形状和尺度大小的冰晶对电磁波的散射特征的不同，导致不同冰晶模型计算的卷云环境下卫星观测的辐射值及地表光通量的不同。利用不同尺度大小和电磁波波长的球形和六角形冰晶的单次散射数据，结合 RSTAR辐射传输模式来定量分析了卷云环境下不同形状的冰晶模型对计算卫星观测的辐射和地表光通量中的影响。结果显示利用不同形状的冰晶模块来计算的卫星观测的辐射，地表向下辐射通量明显不同。波长在0.4～1.0μm之间的大气窗口部分的光谱辐射通量的差距最大。总辐射通量受云粒子形状的影响显著。研究证实了正确选择冰晶模型对卫星反演卷云微物理和光学参数的反演及计算地表光通量的重要性。该结果对于云微物理参数的反演及地表向下辐射通量的模拟具有参考价值。
권운중빙정입자적단차광산사계산시권운복사전수급운미물리삼수반연적중요기출。근년，이용고관측빈솔적정지기상위성수거래반연수운화권운적광학화미물리삼수，진이계산지표광통량적연구배수중시。연이，흔다연구중권운적빙정용구형모형래모의。유우불동형상화척도대소적빙정대전자파적산사특정적불동，도치불동빙정모형계산적권운배경하위성관측적복사치급지표광통량적불동。이용불동척도대소화전자파파장적구형화륙각형빙정적단차산사수거，결합 RSTAR복사전수모식래정량분석료권운배경하불동형상적빙정모형대계산위성관측적복사화지표광통량중적영향。결과현시이용불동형상적빙정모괴래계산적위성관측적복사，지표향하복사통량명현불동。파장재0.4～1.0μm지간적대기창구부분적광보복사통량적차거최대。총복사통량수운입자형상적영향현저。연구증실료정학선택빙정모형대위성반연권운미물리화광학삼수적반연급계산지표광통량적중요성。해결과대우운미물리삼수적반연급지표향하복사통량적모의구유삼고개치。
Single scattering properties for spherical and hexagonal ice crystal models with different size parameters and wave-lengths were employed to calculate satellite observed radiation and downward flux in ground surface using RSTAR radiative transfer model .Results indicated that simulated satellite observed radiation and ground surface downward radiant flux from dif-ferent shapes of ice crystal models were different .The difference in the spectral radiation fluxes between 0.4 and 1.0 μm was largest ,and particle shapes affected the downward radiant flux significantly .It was verified that the proper selection of the effec-tive ice crystal model is not only important for retrieval of the microphysical and optical parameters of the cirrus cloud ,but also important for obtaining the radiant flux on the earth’s surface correctly .These results are important for retrieving cloud micro-physical parameters and simulation of the ground surface downward radiant flux .