کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7224203 | 1470567 | 2018 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Determination of the boundary value of the aerosol extinction coefficient and its effects on the extinction coefficient profile of aerosol in lower atmosphere
ترجمه فارسی عنوان
تعیین ارزش مرزی ضریب انقراض آئروسل و اثرات آن بر مشخصات ضریب انقراض آئروسل در فضای پایین تر
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
چکیده انگلیسی
It is known that the boundary condition is important for deriving the aerosol extinction coefficient profiles from the lidar return signals using the popular Fernald's method. However, when the lidar return signals are available only for the lower atmosphere, the determination of the boundary condition is a hard task. In this paper we propose an approach for determining the boundary value of the aerosol extinction coefficient. Starting from the lidar equation we firstly derive a nonlinear equation in terms of the boundary value of the aerosol extinction coefficient, considering the extinction coefficient of the atmosphere molecules. The equation is numerically solved using the known Jarratt's iterative method. The boundary value of the aerosol extinction coefficient is hence obtained. As numerical examples, we obtain the boundary values of the aerosol extinction coefficient and their variations for two lidar signals, considering the effects of the boundary position, aerosol extinction-to-backscattering ratio, signal power, and the extinction coefficient of the atmosphere molecules. Further, the aerosol extinction coefficient profiles are derived using the Fernald's method. Our simulation results reveal that the derived aerosol extinction coefficient profiles have good consistencies. The proposed method is efficient for determining the boundary value of the aerosol extinction coefficient that is necessary for the derivation of the aerosol extinction coefficient profiles. Our method may find applications in investigating aerosol optical properties using lidar signals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - Volume 160, May 2018, Pages 283-297
Journal: Optik - Volume 160, May 2018, Pages 283-297
نویسندگان
Yuzhao Ma, Jiaqi Liu, Nan Chen, Huiliang Gao, Xinglong Xiong,