scholarly journals GOES 8 aerosol optical thickness assimilation in a mesoscale model: Online integration of aerosol radiative effects

2004 ◽  
Vol 109 (D23) ◽  
Author(s):  
Jun Wang ◽  
U. S. Nair ◽  
Sundar A. Christopher
Keyword(s):  
Optical Thickness ◽  
Mesoscale Model ◽  
Aerosol Optical Thickness ◽  
Radiative Effects ◽  
Aerosol Radiative Effects ◽  
Aerosol Radiative

Aerosol Radiative Effects Over India from Direct Radiation Measurements and Model Estimates

2021 ◽  
Author(s):  
Tamanna Subba ◽  
Mukunda M. Gogoi ◽  
K. Krishna Moorthy ◽  
Pradip K. Bhuyan ◽  
Binita Pathak ◽  
...  
Keyword(s):  
Radiative Effects ◽  
Direct Radiation ◽  
Aerosol Radiative Effects ◽  
Radiation Measurements ◽  
Aerosol Radiative

scholarly journals Aerosol radiative effects with MACv2

2019 ◽  
Author(s):  
Stefan Kinne
Keyword(s):  
Anthropogenic Sources ◽  
Transfer Model ◽  
Strong Impact ◽  
Radiative Effects ◽  
Anthropogenic Aerosols ◽  
Anthropogenic Aerosol ◽  
Aerosol Forcing ◽  
Aerosol Radiative Effects ◽  
The Impact ◽  
Aerosol Radiative

Abstract. onthly global maps for aerosol properties of the MACv2 climatology are applied in an off-line radiative transfer model to determine aerosol radiative effects. For details beyond global averages in most cases global maps are presented to visualize regional and seasonal details. Aside from the direct radiative (aerosol presence) effect, including those for aerosol components as extracted from MACv2 aerosol optics, also the major aerosol indirect radiative effect is covered. Hereby, the impact of smaller drops in water clouds due to added anthropogenic aerosol was simulated by applying a satellite retrieval based fit from locally associations between aerosol and drop concentrations over oceans. Present-day anthropogenic aerosols of MACv2 – on a global average basis – reduce the radiative net-fluxes at the top of the atmosphere (TOA) by −1.0 W/m2 and at the surface by −2.1 W/m2. Direct cooling contributions are only about half of indirect contributions (−.35 vs −.65) at TOA, but about twice at the surface (−1.45 vs −.65), as solar absorption of the direct effect warms the atmosphere by +1.1 W/m2. Natural aerosols are on average less absorbing (for a relatively larger solar TOA cooling) and larger in size (now contributing with IR greenhouse warming). Thus, average TOA direct forcing efficiencies for total and anthropogenic aerosol happen to be similar: −11 W/m2/AOD at all-sky and −24 W/m2/AOD at clear-sky conditions. The present-day direct impact by all soot (BC) is globally averaged +0.55W/m2 and at least half of it should be attributed to anthropogenic sources. Hereby any accuracy of anthropogenic impacts, not just for soot, suffers from the limited access to a pre-industrial reference. Anthropogenic uncertainty has a particular strong impact on aerosol indirect effects, which dominate the (TOA) forcing. Accounting for uncertainties in the anthropogenic definition, present-day aerosol forcing is estimated to stay within the −0.7 to −1.6 W/m2 range, with a best estimate at −1 W/m2. Calculations with model predicted temporal changes to anthropogenic AOD indicate that qualitatively the anthropogenic aerosol forcing has not changed much over the last decades and is not likely to increase over the next decades, despite strong regional shifts. These regional shifts explain most solar insolation (brightening or dimming) trends that have been observed by ground-based radiation data.

scholarly journals Does temperature nudging overwhelm aerosol radiative effects in regional integrated climate models?

2017 ◽  
Vol 154 ◽  
pp. 42-52 ◽  
Author(s):  
Jian He ◽  
Timothy Glotfelty ◽  
Khairunnisa Yahya ◽  
Kiran Alapaty ◽  
Shaocai Yu
Keyword(s):  
Climate Models ◽  
Radiative Effects ◽  
Aerosol Radiative Effects ◽  
Aerosol Radiative

Regional simulation of aerosol radiative effects and their influence on rainfall over India using WRFChem model

2016 ◽  
Vol 182 ◽  
pp. 232-242 ◽  
Author(s):  
Sumita Kedia ◽  
Ribu Cherian ◽  
Sahidul Islam ◽  
Subrata Kumar Das ◽  
Akshara Kaginalkar
Keyword(s):  
Radiative Effects ◽  
Regional Simulation ◽  
Aerosol Radiative Effects ◽  
Aerosol Radiative

scholarly journals A Study of the Longer Term Variation of Aerosol Optical Thickness and Direct Shortwave Aerosol Radiative Effect Trends Using MODIS and CERES

2017 ◽  
Author(s):  
Ricardo Alfaro-Contreras ◽  
Jianglong Zhang ◽  
Jeffrey S. Reid ◽  
Sundar Christopher
Keyword(s):  
Optical Thickness ◽  
Broad Band ◽  
Radiant Energy ◽  
Energy System ◽  
Short Wave ◽  
Aerosol Optical Thickness ◽  
Radiative Effect ◽  
Distribution Models ◽  
Direct Forcing ◽  
Aerosol Radiative

Abstract. By combining Collection 6 Moderate Resolution and Imaging Spectroradiometer (MODIS) and Version 22 Multi-angle Imaging Spectroradiometer (MISR) aerosol products with Cloud and Earth’s Radiant Energy System (CERES) flux products, the aerosol optical thickness (AOT, at 0.55 µm) and Short-Wave Aerosol Radiative Effect (SWARE) trends are studied over ocean for the near full Terra (2000–2015) and Aqua (2002–2015) data records. Despite differences in sampling methods, regional SWARE and AOT trends are highly correlated with one another. Over global oceans, weak SWARE (cloud free SW flux) and AOT trends of 0.5–0.6 W m−2 (−0.5 to −0.6 W m−2) and 0.002 AOT decade−1 were found using Terra data. Near zero AOT and SWARE trends are also found for using Aqua data, regardless of Angular Distribution Models (ADMs) used. Regionally, positive SWARE and AOT trends are found over the Bay of Bengal, Arabian Sea, Arabian/Persian Gulf and the Red Sea, while statistically significant negative trends are derived over the Mediterranean Sea and the eastern US coast. In addition, the global mean instantaneous SW aerosol direct forcing efficiencies are found to be ~ −60 W m−2 per AOT, with corresponding SWARE values of ~ −7 W m−2 from both Aqua and Terra data, and again, regardless of CERES ADMs used. Regionally, SW aerosol direct forcing efficiency values of ~ −40 W m−2 per AOT are found over the southwest coast of Africa where smoke aerosol particles dominate in summer. Larger (in magnitude) SW aerosol direct forcing efficiency values of −50 to −80 W m−2 per AOT are found over several other dust and pollutant aerosol dominated regions. Lastly, the AOT and SWARE trends from this study are also inter-compared with aerosol trends (such as active-based) from several previous studies. Findings suggest that a cohesive understanding of the changing aerosol skies can be achieved through the analysis of observations from both passive- and active-based analyses, as well as at both narrow-band and broad-band data sets.

Aerosol radiative effects on mesoscale cloud–precipitation variables over Northeast Asia during the MAPS-Seoul 2015 campaign

2018 ◽  
Vol 172 ◽  
pp. 109-123 ◽  
Author(s):  
Shin-Young Park ◽  
Hyo-Jung Lee ◽  
Jeong-Eon Kang ◽  
Taehyoung Lee ◽  
Cheol-Hee Kim
Keyword(s):  
Northeast Asia ◽  
Radiative Effects ◽  
Aerosol Radiative Effects ◽  
Aerosol Radiative
Sign in / Sign up

Export Citation Format

Share Document