A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, India
Implications of aerosol characteristics, observed during a five-year (2004–2009) period over Pune (a tropical urban location), to short-wave radiation budget are reported. A discrete ordinate radiative transfer (DISORT) model with a code, namely, Santa Barbara DISORT Atmospheric Radiative...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Stockholm University Press
2012-12-01
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| Series: | Tellus: Series B, Chemical and Physical Meteorology |
| Subjects: | |
| Online Access: | http://www.tellusb.net/index.php/tellusb/article/view/18420/pdf_1 |
| _version_ | 1811302393596346368 |
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| author | Sumit Kumar P. C. S. Devara |
| author_facet | Sumit Kumar P. C. S. Devara |
| author_sort | Sumit Kumar |
| collection | DOAJ |
| description | Implications of aerosol characteristics, observed during a five-year (2004–2009) period over Pune (a tropical urban location), to short-wave radiation budget are reported. A discrete ordinate radiative transfer (DISORT) model with a code, namely, Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART), has been used to carry out the radiative transfer computations. The validity of the method is demonstrated using independent ground-based remote sensing observations. Uncertainties in the estimates are also quantified. Clear-sky forcing reveals the points that include (1) Large negative bottom-of-the-atmosphere (BOA) forcing (more than−30 Wm−2) in all the months with peaks during October, December and March when the surface forcing exceeds~−40 Wm−2, and (2) Surface forcing values are higher for pre-monsoon months, while they are comparable for winter and post-monsoon months. The top-of-the-atmosphere (TOA) forcing is found to be negative during all the seasons. Large differences between TOA and BOA forcing during pre-monsoon, winter and post-monsoon indicate large absorption of radiant energy (~30 Wm−2) within the atmosphere during these seasons, thus increasing atmospheric heating by~1 K/d. These values imply that aerosols have considerable impact on the atmosphere–surface system by causing substantial warming/cooling at the atmosphere/surface. This persistent trend in strong atmospheric absorption is likely to alter atmospheric thermodynamic conditions and thus affects circulation considerably. |
| first_indexed | 2024-04-13T07:28:28Z |
| format | Article |
| id | doaj.art-c9c0e5ab19394f829dc74d2f8a1d8788 |
| institution | Directory Open Access Journal |
| issn | 1600-0889 |
| language | English |
| last_indexed | 2024-04-13T07:28:28Z |
| publishDate | 2012-12-01 |
| publisher | Stockholm University Press |
| record_format | Article |
| series | Tellus: Series B, Chemical and Physical Meteorology |
| spelling | doaj.art-c9c0e5ab19394f829dc74d2f8a1d87882022-12-22T02:56:26ZengStockholm University PressTellus: Series B, Chemical and Physical Meteorology1600-08892012-12-0164011310.3402/tellusb.v64i0.18420A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, IndiaSumit KumarP. C. S. DevaraImplications of aerosol characteristics, observed during a five-year (2004–2009) period over Pune (a tropical urban location), to short-wave radiation budget are reported. A discrete ordinate radiative transfer (DISORT) model with a code, namely, Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART), has been used to carry out the radiative transfer computations. The validity of the method is demonstrated using independent ground-based remote sensing observations. Uncertainties in the estimates are also quantified. Clear-sky forcing reveals the points that include (1) Large negative bottom-of-the-atmosphere (BOA) forcing (more than−30 Wm−2) in all the months with peaks during October, December and March when the surface forcing exceeds~−40 Wm−2, and (2) Surface forcing values are higher for pre-monsoon months, while they are comparable for winter and post-monsoon months. The top-of-the-atmosphere (TOA) forcing is found to be negative during all the seasons. Large differences between TOA and BOA forcing during pre-monsoon, winter and post-monsoon indicate large absorption of radiant energy (~30 Wm−2) within the atmosphere during these seasons, thus increasing atmospheric heating by~1 K/d. These values imply that aerosols have considerable impact on the atmosphere–surface system by causing substantial warming/cooling at the atmosphere/surface. This persistent trend in strong atmospheric absorption is likely to alter atmospheric thermodynamic conditions and thus affects circulation considerably.http://www.tellusb.net/index.php/tellusb/article/view/18420/pdf_1aerosol optical propertiesdirect radiative effectsurface albedosun/sky radiometerheating rates |
| spellingShingle | Sumit Kumar P. C. S. Devara A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, India Tellus: Series B, Chemical and Physical Meteorology aerosol optical properties direct radiative effect surface albedo sun/sky radiometer heating rates |
| title | A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, India |
| title_full | A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, India |
| title_fullStr | A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, India |
| title_full_unstemmed | A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, India |
| title_short | A long-term study of aerosol modulation of atmospheric and surface solar heating over Pune, India |
| title_sort | long term study of aerosol modulation of atmospheric and surface solar heating over pune india |
| topic | aerosol optical properties direct radiative effect surface albedo sun/sky radiometer heating rates |
| url | http://www.tellusb.net/index.php/tellusb/article/view/18420/pdf_1 |
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