کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8863864 | 1620292 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Radiative impact of Etna volcanic aerosols over south eastern Italy on 3 December 2015
ترجمه فارسی عنوان
تأثیرات تابشی آئروسلهای آتشفشانی اتنا در جنوب شرقی ایتالیا در 3 دسامبر 2015
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
Irradiance and LiDAR measurements at the surface combined with satellite products from SEVIRI (Spinning Enhanced Visible and InfraRed Imager) and MODIS (MODerate resolution Imaging Spectroradiometer) were used to detect and characterize the Etna volcano (Italy) plume that crossed southeastern Italy on 3 December 2015, from about 10:00 up to 11:30 UTC, and estimate its radiative impact. The volcanic plume was delivered by a violent and short paroxysmal eruption that occurred from 02:30 to 03:10 UTC of 3 December 2015, about 400â¯km away from the monitoring site. Measurements from the LiDAR combined with model results showed that the aerosol optical depth of the volcanic plume, located from about 11 to 13â¯km above sea level (asl), was equal to 0.80â¯Â±â¯0.07â¯at 532â¯nm. A low tropospheric aerosol load, located up to about 7â¯km asl, with optical depth equal to 0.19â¯Â±â¯0.01â¯at 532â¯nm was also revealed by the LiDAR measurements. Short-Wave (SW) downward and upward irradiance measurements revealed that the instantaneous SW direct radiative forcing at the surface (DRFsurf) decreased to â146â¯Â±â¯16â¯Wâ¯mâ2 at 10:50 UTC because of the volcanic plume passage. A Two-Stream radiative transfer model integrated with experimental measurements, which took into account the volcanic plume and the low tropospheric aerosol properties, was used to reproduce the SW radiative flux measurements at the surface and estimate the aerosol DRF both at the top of the atmosphere (TOA) and at the surface, in addition to the aerosol heating rate vertical profile. We found that the clear-sky, instantaneous, SW DRF at the TOA and the atmospheric forcing were equal to â112 and 33â¯Wâ¯m-2, respectively, at 10:50 UTC that represented the time at which the volcanic plume radiative impact was the highest. The SW aerosol heating rate reached the peak value of 1.24â¯K dayâ1â¯at 12â¯km asl and decreased to â0.06â¯K dayâ1â¯at 11â¯km asl, at 10:50 UTC. The role of the aerosol load located up to about 7â¯km asl and the corresponding radiative impact has also been evaluated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 182, June 2018, Pages 155-170
Journal: Atmospheric Environment - Volume 182, June 2018, Pages 155-170
نویسندگان
S. Romano, P. Burlizzi, S. Kinne, F. De Tomasi, U. Hamann, M.R. Perrone,