Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Aerosol radiative forcing over a high-altitude station Merak, in the trans-Himalayan region during advection of anthropogenic events from the Indo-Gangetic Plain
https://orcid.org/0000-0002-4883-670X
Abstract Advection of anthropogenic aerosols from the Indo-Gangetic Plain (IGP) and dust aerosols from distant deserts towards a high-altitude station Merak, in the trans-Himalayan region are reported during June–July 2011. In order to differentiate the advection event, aerosol optical properties were examined during aged background conditions at the site. During the aged background conditions, aerosol optical depth (AOD at 500 nm) and Angstrom exponent (α) at the station were ∼0.06 and 1.36, respectively which were increased to 0.13 and 1.62, respectively during the advection event. Further, a strong signature of fine-mode aerosol volume size distribution, dominated by absorbing aerosols, was observed during the advection event. The average atmospheric forcing during the aged background condition was found to be 0.57 Wm−2 (with corresponding heating rate of 0.05 Kday−1) and these results were enhanced to 2.58 Wm−2 (with corresponding heating rate of 0.22 Kday−1) during the advection event. The present study reveals that during the advection event, heating rate in the atmosphere was increased by about four times than the aged background condition. Such atmospheric warming in the region may influence the melting of the Himalayan glaciers and consequently it may effect the local atmospheric circulation.
Highlights AOD increases by 117% during advection event (AE) than the background condition. Fine-mode of absorbing aerosols are dominant during the AE. During AE atmospheric forcing increases about 78% than the background condition. Consequently, atmospheric heating rate increases about four times during the AE.
Aerosol radiative forcing over a high-altitude station Merak, in the trans-Himalayan region during advection of anthropogenic events from the Indo-Gangetic Plain
https://orcid.org/0000-0002-4883-670X
Abstract Advection of anthropogenic aerosols from the Indo-Gangetic Plain (IGP) and dust aerosols from distant deserts towards a high-altitude station Merak, in the trans-Himalayan region are reported during June–July 2011. In order to differentiate the advection event, aerosol optical properties were examined during aged background conditions at the site. During the aged background conditions, aerosol optical depth (AOD at 500 nm) and Angstrom exponent (α) at the station were ∼0.06 and 1.36, respectively which were increased to 0.13 and 1.62, respectively during the advection event. Further, a strong signature of fine-mode aerosol volume size distribution, dominated by absorbing aerosols, was observed during the advection event. The average atmospheric forcing during the aged background condition was found to be 0.57 Wm−2 (with corresponding heating rate of 0.05 Kday−1) and these results were enhanced to 2.58 Wm−2 (with corresponding heating rate of 0.22 Kday−1) during the advection event. The present study reveals that during the advection event, heating rate in the atmosphere was increased by about four times than the aged background condition. Such atmospheric warming in the region may influence the melting of the Himalayan glaciers and consequently it may effect the local atmospheric circulation.
Highlights AOD increases by 117% during advection event (AE) than the background condition. Fine-mode of absorbing aerosols are dominant during the AE. During AE atmospheric forcing increases about 78% than the background condition. Consequently, atmospheric heating rate increases about four times during the AE.
Aerosol radiative forcing over a high-altitude station Merak, in the trans-Himalayan region during advection of anthropogenic events from the Indo-Gangetic Plain
https://orcid.org/0000-0002-4883-670X
Abstract Advection of anthropogenic aerosols from the Indo-Gangetic Plain (IGP) and dust aerosols from distant deserts towards a high-altitude station Merak, in the trans-Himalayan region are reported during June–July 2011. In order to differentiate the advection event, aerosol optical properties were examined during aged background conditions at the site. During the aged background conditions, aerosol optical depth (AOD at 500 nm) and Angstrom exponent (α) at the station were ∼0.06 and 1.36, respectively which were increased to 0.13 and 1.62, respectively during the advection event. Further, a strong signature of fine-mode aerosol volume size distribution, dominated by absorbing aerosols, was observed during the advection event. The average atmospheric forcing during the aged background condition was found to be 0.57 Wm−2 (with corresponding heating rate of 0.05 Kday−1) and these results were enhanced to 2.58 Wm−2 (with corresponding heating rate of 0.22 Kday−1) during the advection event. The present study reveals that during the advection event, heating rate in the atmosphere was increased by about four times than the aged background condition. Such atmospheric warming in the region may influence the melting of the Himalayan glaciers and consequently it may effect the local atmospheric circulation.
Highlights AOD increases by 117% during advection event (AE) than the background condition. Fine-mode of absorbing aerosols are dominant during the AE. During AE atmospheric forcing increases about 78% than the background condition. Consequently, atmospheric heating rate increases about four times during the AE.
Aerosol radiative forcing over a high-altitude station Merak, in the trans-Himalayan region during advection of anthropogenic events from the Indo-Gangetic Plain
Ningombam, Shantikumar S. (Autor:in) / Bagare, S.P. (Autor:in) / Srivastava, A.K. (Autor:in) / Sohn, B.J. (Autor:in) / Song, H.-J. (Autor:in) / Larson, E. (Autor:in)
Atmospheric Environment ; 98 ; 253-259
25.08.2014
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Aerosol indirect effect over Indo-Gangetic plain
| Elsevier | 2007
| DOAJ | 2020