کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7846100 | 1508605 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Extinction effects of atmospheric compositions on return signals of space-based lidar from numerical simulation
ترجمه فارسی عنوان
اثرات انقراض ترکیبات جوی بر سیگنال های بازگشتی لیادار مبتنی بر فضا از شبیه سازی عددی
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
طیف سنجی
چکیده انگلیسی
The atmospheric composition induced extinction effect on return signals of space-based lidar remains incomprehensively understood, especially around 355â¯nm and 2051â¯nm channels. Here we simulated the extinction effects of atmospheric gases (e.g., H2O, CO2, and O3) and six types of aerosols (clean continental, clean marine, dust, polluted continental, polluted dust, and smoke) on return signals of space-based lidar system at 355â¯nm, 532â¯nm, 1064â¯nm, and 2051â¯nm channels, based on a robust lidar return signal simulator in combination with radiative transfer model (LBLRTM). Results show significant Rayleigh (molecular) scattering effects in the return signals at 355â¯nm and 532â¯nm channels, which markedly decays with increases in wavelength. The spectral transmittance of CO2 is nearly 0, yet the transmittance of H2O is approximately 100% at 2051â¯nm, which verifies this 2051â¯nm channel is suitable for CO2 retrieval. The spectral transmittance also reveals another possible window for CO2 and H2O detection at 2051.6â¯nm, since their transmittance both near 0.5. Moreover the corresponding Doppler return signals at 2051.6â¯nm channel can be used to retrieve wind field. Thus we suggest 2051â¯nm channel may better be centered at 2051.6â¯nm. Using the threshold for the signal-to-noise ratio (SNR) of return signals, the detection ranges for three representative distribution scenarios for the six types of aerosols at four typical lidar channels are determined. The results clearly show that high SNR values can be seen ubiquitously in the atmosphere ranging from the height of aerosol layer top to 25â¯km at 355â¯nm, and can been found at 2051.6â¯nm in the lower troposphere that highly depends on aerosol distribution scenario in the vertical. This indicates that the Doppler space-based lidar system with a double-channel joint detection mode is able to retrieve atmospheric wind field or profile from 0 to 25â¯km.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 210, May 2018, Pages 180-188
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 210, May 2018, Pages 180-188
نویسندگان
Lilin Yao, Fu Wang, Min Min, Ying Zhang, Jianping Guo, Xiao Yu, Binglong Chen, Yiming Zhao, Lidong Wang,