Evolution of Aerosol Optical Properties from Wood Smoke in Real Atmosphere Influenced by Burning Phase and Solar Radiation

2021 ◽  
Author(s):  
Dantong Liu ◽  
Siyuan Li ◽  
Dawei Hu ◽  
Shaofei Kong ◽  
Yi Cheng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Radiation ◽  
Wood Smoke ◽  
Aerosol Optical Properties ◽  
Real Atmosphere

scholarly journals The direct effect of aerosols on solar radiation based on satellite observations, reanalysis datasets, and spectral aerosol optical properties from Global Aerosol Data Set (GADS)

2007 ◽  
Vol 7 (1) ◽  
pp. 753-783 ◽  
Author(s):  
N. Hatzianastassiou ◽  
C. Matsoukas ◽  
E. Drakakis ◽  
P. W. Stackhouse ◽  
P. Koepke ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Radiation ◽  
Hydrological Cycle ◽  
Regional Scale ◽  
Local Scale ◽  
Transfer Model ◽  
Surface Cooling ◽  
Anthropogenic Aerosols ◽  
Aerosol Optical Properties ◽  
Data Set

Abstract. A global estimate of the seasonal direct radiative effect (DRE) of natural plus anthropogenic aerosols on solar radiation under all-sky conditions is obtained by combining satellite measurements and reanalysis data with a spectral radiative transfer model. The estimates are obtained with detailed spectral model computations separating the ultraviolet (UV), visible and near-infrared wavelengths. The global distribution of spectral aerosol optical properties was taken from the Global Aerosol Data Set (GADS) whereas data for clouds, water vapour, ozone, carbon dioxide, methane and surface albedo were taken from various satellite and reanalysis datasets. Using these aerosol properties and other related variables, we generate climatological (for the 12-year period 1984–1995) monthly mean aerosol DREs. The global annual mean DRE on the outgoing SW radiation at the top of atmosphere (TOA, ΔFTOA) is 1.62 Wm−2 (with a range of –10 to 15 Wm−2, positive values corresponding to planetary cooling), the effect on the atmospheric absorption of SW radiation (ΔFatmab) is 1.6 Wm−2 (values up to 35 Wm−2, corresponding to atmospheric warming), and the effect on the surface downward and absorbed SW radiation (Δ Fsurf, and ΔFsurfnet, respectively) is –3.93 and –3.22 Wm−2 (values up to –45 and –35 Wm−2, respectively, corresponding to surface cooling.) According to our results, aerosols decrease/increase the planetary albedo by –3 to 13% at the local scale, whereas on planetary scale the result is an increase of 1.5%. Aerosols can warm locally the atmosphere by up to 0.98 K day−1, whereas they can cool the Earth's surface by up to –2.9 K day−1. Both these effects, which can significantly modify atmospheric dynamics and the hydrological cycle, can produce significant planetary cooling on a regional scale, although planetary warming can arise over highly reflecting surfaces. The aerosol DRE at the Earth's surface compared to TOA can be up to 15 times larger at the local scale. The largest aerosol DRE takes place in the northern hemisphere both at the surface and the atmosphere, arising mainly at ultraviolet and visible wavelengths.

Aerosol Optical Properties in the Iranian Region Obtained by Ground-Based Solar Radiation Measurements in the Summer Of 1991

1996 ◽  
Vol 35 (8) ◽  
pp. 1265-1278 ◽  
Author(s):  
Teruyuki Nakajima ◽  
Tadahiro Hayasaka ◽  
Akiko Higurashi ◽  
Gen Hashida ◽  
Naser Moharram-Nejad ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Radiation ◽  
Aerosol Optical Properties ◽  
Radiation Measurements

scholarly journals The direct effect of aerosols on solar radiation over the broader Mediterranean basin

2012 ◽  
Vol 12 (15) ◽  
pp. 7165-7185 ◽  
Author(s):  
C. D. Papadimas ◽  
N. Hatzianastassiou ◽  
C. Matsoukas ◽  
M. Kanakidou ◽  
N. Mihalopoulos ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Radiation ◽  
Mediterranean Basin ◽  
Shortwave Radiation ◽  
Transfer Model ◽  
Aerosol Optical Properties ◽  
Spectral Radiation ◽  
Surface Solar Radiation ◽  
Data Set ◽  
Atmospheric Column

Abstract. For the first time, the direct radiative effect (DRE) of aerosols on solar radiation is computed over the entire Mediterranean basin, one of the most climatically sensitive world regions, using a deterministic spectral radiation transfer model (RTM). The DRE effects on the outgoing shortwave radiation at the top of atmosphere (TOA), DRETOA, on the absorption of solar radiation in the atmospheric column, DREatm, and on the downward and absorbed surface solar radiation (SSR), DREsurf and DREnetsurf, respectively, are computed separately. The model uses input data for the period 2000–2007 for various surface and atmospheric parameters, taken from satellite (International Satellite Cloud Climatology Project, ISCCP-D2), Global Reanalysis projects (National Centers for Environmental Prediction – National Center for Atmospheric Research, NCEP/NCAR), and other global databases. The spectral aerosol optical properties (aerosol optical depth, AOD, asymmetry parameter, gaer and single scattering albedo, ωaer), are taken from the MODerate resolution Imaging Spectroradiometer (MODIS) of NASA (National Aeronautics and Space Administration) and they are supplemented by the Global Aerosol Data Set (GADS). The model SSR fluxes have been successfully validated against measurements from 80 surface stations of the Global Energy Balance Archive (GEBA) covering the period 2000–2007. A planetary cooling is found above the Mediterranean on an annual basis (regional mean DRETOA = −2.4 W m−2). Although a planetary cooling is found over most of the region, of up to −7 W m−2, large positive DRETOA values (up to +25 W m−2) are found over North Africa, indicating a strong planetary warming, and a weaker warming over the Alps (+0.5 W m−2). Aerosols are found to increase the absorption of solar radiation in the atmospheric column over the region (DREatm = +11.1 W m−2) and to decrease SSR (DREsurf = −16.5 W m−2 and DREnetsurf−13.5 W m−2) inducing thus significant atmospheric warming and surface radiative cooling. The calculated seasonal and monthly DREs are even larger, reaching −25.4 W m−2 (for DREsurf). Within the range of observed natural or anthropogenic variability of aerosol optical properties, AOD seems to be the main responsible parameter for modifications of regional aerosol radiative effects, which are found to be quasi-linearly dependent on AOD, ωaer and gaer.

scholarly journals The direct effect of aerosols on solar radiation based on satellite observations, reanalysis datasets, and spectral aerosol optical properties from Global Aerosol Data Set (GADS)

2007 ◽  
Vol 7 (10) ◽  
pp. 2585-2599 ◽  
Author(s):  
N. Hatzianastassiou ◽  
C. Matsoukas ◽  
E. Drakakis ◽  
P. W. Stackhouse ◽  
P. Koepke ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Radiation ◽  
Hydrological Cycle ◽  
Regional Scale ◽  
Local Scale ◽  
Transfer Model ◽  
Surface Cooling ◽  
Anthropogenic Aerosols ◽  
Aerosol Optical Properties ◽  
Data Set

Abstract. A global estimate of the seasonal direct radiative effect (DRE) of natural plus anthropogenic aerosols on solar radiation under all-sky conditions is obtained by combining satellite measurements and reanalysis data with a spectral radiative transfer model and spectral aerosol optical properties taken from the Global Aerosol Data Set (GADS). The estimates are obtained with detailed spectral model computations separating the ultraviolet (UV), visible and near-infrared wavelengths. The global distribution of spectral aerosol optical properties was taken from GADS whereas data for clouds, water vapour, ozone, carbon dioxide, methane and surface albedo were taken from various satellite and reanalysis datasets. Using these aerosol properties and other related variables, we generate climatological (for the 12-year period 1984–1995) monthly mean aerosol DREs. The global annual mean DRE on the outgoing SW radiation at the top of atmosphere (TOA, ΔFTOA) is −1.62 W m−2 (with a range of −15 to 10 W m−2, negative values corresponding to planetary cooling), the effect on the atmospheric absorption of SW radiation (ΔFatmab) is 1.6 W m−2 (values up to 35 W m−2, corresponding to atmospheric warming), and the effect on the surface downward and absorbed SW radiation (ΔFsurf, and ΔFsurfnet, respectively) is −3.93 and −3.22 W m−2 (values up to −45 and −35 W m−2, respectively, corresponding to surface cooling). According to our results, aerosols decrease/increase the planetary albedo by −3 to 13% at the local scale, whereas on planetary scale the result is an increase of 1.5%. Aerosols can warm locally the atmosphere by up to 0.98 K day−1, whereas they can cool the Earth's surface by up to −2.9 K day−1. Both these effects, which can significantly modify atmospheric dynamics and the hydrological cycle, can produce significant planetary cooling on a regional scale, although planetary warming can arise over highly reflecting surfaces. The aerosol DRE at the Earth's surface compared to TOA can be up to 15 times larger at the local scale. The largest aerosol DRE takes place in the northern hemisphere both at the surface and the atmosphere, arising mainly at ultraviolet and visible wavelengths.

Aerosol Optical Properties of the Free Troposphere

1992 ◽  
Author(s):  
James M. Rosen
Keyword(s):  
Optical Properties ◽  
Free Troposphere ◽  
Aerosol Optical Properties

Temporal and spatial variations of aerosol optical properties over the Korean peninsula during KORUS-AQ

2021 ◽  
pp. 118301
Author(s):  
Yongjoo Choi ◽  
Young Sung Ghim ◽  
Michal Segal Rozenhaimer ◽  
Jens Redemann ◽  
Samuel E. LeBlanc ◽  
...  
Keyword(s):  
Optical Properties ◽  
Korean Peninsula ◽  
Spatial Variations ◽  
Aerosol Optical Properties ◽  
Temporal And Spatial Variations ◽  
Temporal And Spatial

MODELING OF AEROSOL OPTICAL PROPERTIES AT AN INDIAN COASTAL SITE DURING THE 1999 INDOEX FIELD PHASE

2001 ◽  
Vol 32 ◽  
pp. 423-424
Author(s):  
S.C. ALFARO ◽  
L. GOMES ◽  
A. GAUDICHET ◽  
J.L. RAJOT ◽  
J.F. LEON ◽  
...  
Keyword(s):  
Optical Properties ◽  
Field Phase ◽  
Aerosol Optical Properties ◽  
Coastal Site

Aerosol optical properties and precipitable water vapor column in the atmosphere of Norway

2015 ◽  
Vol 54 (6) ◽  
pp. 1505 ◽  
Author(s):  
Dennis Muyimbwa ◽  
Øyvind Frette ◽  
Jakob J. Stamnes ◽  
Taddeo Ssenyonga ◽  
Yi-Chun Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Vapor ◽  
Precipitable Water ◽  
Precipitable Water Vapor ◽  
Aerosol Optical Properties
Sign in / Sign up

Export Citation Format

Share Document