Next Article in Journal
Emission and Cytotoxicity of Surgical Smoke: Cholesta-3,5-Diene Released from Pyrolysis of Prostate Tissue
Previous Article in Journal
A Controlled Study on the Characterisation of Bioaerosols Emissions from Compost
Previous Article in Special Issue
Analysis of Dust Aerosol Retrievals Using Satellite Data in Central Asia
Article Menu

Export Article

Open AccessArticle
Atmosphere 2018, 9(10), 380;

Large-Scale Modeling of Absorbing Aerosols and Their Semi-Direct Effects

Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany
Author to whom correspondence should be addressed.
Received: 19 July 2018 / Revised: 22 September 2018 / Accepted: 24 September 2018 / Published: 28 September 2018
(This article belongs to the Special Issue Radiative Transfer in the Earth Atmosphere)
Full-Text   |   PDF [4171 KB, uploaded 28 September 2018]   |  


Radiative effects of absorbing black carbon and mineral dust aerosols are estimated from global aerosol climate model simulations with fixed sea surface temperatures as a boundary condition. Semi-direct effects are approximated as the residual between the total direct radiative effect and the instantaneous direct radiative effect of the simulated absorbing aerosol species. No distinction is made for aerosols from natural and anthropogenic sources. Results for global average are highly uncertain due to high model variability, but consistent with previous estimates. The global average results for black carbon aerosol semi-direct effects are small due to cancellation of regionally positive or negative effects, and may be positive or negative overall, depending on the model setup. The presence of mineral dust aerosol above dark surfaces and below a layer containing black carbon aerosol may enhance the reflectivity and act to enhance the positive radiative effect of black carbon aerosol. When mineral dust is absent the semi-direct effect at the top-of-atmosphere of black carbon aerosol from both anthropogenic and natural sources is −0.03 Wm−2, while averaging to +0.09 Wm−2 if dust is included. View Full-Text
Keywords: absorbing aerosol; radiative budget; semi-direct effect absorbing aerosol; radiative budget; semi-direct effect

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Tegen, I.; Heinold, B. Large-Scale Modeling of Absorbing Aerosols and Their Semi-Direct Effects. Atmosphere 2018, 9, 380.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Atmosphere EISSN 2073-4433 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top