Filters








1,348 Hits in 7.0 sec

Simulation of aerosol distributions and radiative forcing for INDOEX: Regional climate impacts

William D. Collins
2002 Journal of Geophysical Research  
The magnitude of the difference between all-sky and clear-sky forcing is quite sensitive to the three-dimensional spatial relationship between the aerosol and cloud fields, and other estimates of the difference  ...  The forcing is calculated for the top-of-atmosphere (TOA), surface, and atmosphere by differencing shortwave fluxes computed with and without aerosols.  ...  The surface albedo and surface cloud-forcing data were obtained from the NASA Langley Research Center Atmospheric Sciences Data Center.  ... 
doi:10.1029/2000jd000032 fatcat:bx3mlowz5bazlnpoqhbh4l7irq

Simulating aerosols using a chemical transport model with assimilation of satellite aerosol retrievals: Methodology for INDOEX

William D. Collins, Phillip J. Rasch, Brian E. Eaton, Boris V. Khattatov, Jean-Francois Lamarque, Charles S. Zender
2001 Journal of Geophysical Research  
The magnitude of the difference between all-sky and clear-sky forcing is quite sensitive to the three-dimensional spatial relationship between the aerosol and cloud fields, and other estimates of the difference  ...  The forcing is calculated for the top-of-atmosphere (TOA), surface, and atmosphere by differencing shortwave fluxes computed with and without aerosols.  ...  The surface albedo and surface cloud-forcing data were obtained from the NASA Langley Research Center Atmospheric Sciences Data Center.  ... 
doi:10.1029/2000jd900507 fatcat:6fyciuvvejdvjoweiv5fsqp6tm

The global distribution of mineral dust and its impacts on the climate system: A review

O. Alizadeh Choobari, P. Zawar-Reza, A. Sturman
2014 Atmospheric research  
They are subject to long-range transport of an intercontinental scale, including North African dust plumes over the Atlantic Ocean, summer dust plumes from the Arabian Peninsula over the Arabian Sea and  ...  Mineral dust aerosols are blown into the atmosphere mainly from arid and semi-arid regions where annual rainfall is extremely low and substantial amounts of alluvial sediment have been accumulated over  ...  This work has also benefited from access to the Bluefern supercomputer facilities at the University of Canterbury, New Zealand.  ... 
doi:10.1016/j.atmosres.2013.11.007 fatcat:xvcfg6tnpne7bi3ju4qhveiuje

Direct and semi-direct radiative effects of anthropogenic aerosols in the Western United States: Seasonal and geographical variations according to regional climate characteristics

Jinwon Kim, Yu Gu, Kuo-Nan Liou, Rokjin J. Park, Chang-Keun Song
2011 Climatic Change  
Climate Change Program of Ministry of Environment, Republic of Korea (Grant No. 1600-1637, and the Korea Meteorological Administration Research and Development Program under the grant CATER 2007-3205.  ...  Acknowledgements This study was supported by the grants from NOAA/GAPP (NA03OAR4310012), NASA Applied Sciences Program (NAG5-13248), NSF ATM-0437349 and ATM-0924876, National Comprehensive Measures against  ...  . 2002; Huang et al. 2007; Gu et al. 2006) where the TOA shortwave radiative forcing of −1 to −15 Wm −2 by anthropogenic sulfates was obtained.  ... 
doi:10.1007/s10584-011-0169-7 fatcat:7tj33t6ebbfejgbm74snj3yxdu

Estimation of the dust aerosol shortwave direct forcing over land based on an equi‐albedo method from satellite measurements

Lin Tian, Peng Zhang, Lin Chen
2019 Journal of Geophysical Research - Atmospheres  
It is important but difficult to measure the shortwave radiative forcing of the dust aerosols over land from satellite-observed radiance because the inhomogeneous surface albedo varies in a large dynamic  ...  The aerosol optical depth (AOD) from Moderate Resolution Imaging Spectroradiometer and the shortwave radiance product from Clouds and Earth's Radiant Energy System were used to derive the dust aerosol  ...  ., 2016) have followed this method to calculate shortwave radiative forcing caused by dust aerosols over cloud-free oceans.  ... 
doi:10.1029/2019jd030974 fatcat:xkw5gevd3bdc5a4yqmfqvgmoeq

Taklimakan dust aerosol radiative heating derived from CALIPSO observations using the Fu-Liou radiation model with CERES constraints

J. Huang, Q. Fu, J. Su, Q. Tang, P. Minnis, Y. Hu, Y. Yi, Q. Zhao
2009 Atmospheric Chemistry and Physics  
The dust aerosol radiative forcing and heating rate over the Taklimakan Desert in Northwestern China in July 2006 are estimated using the Fu-Liou radiative transfer model along with satellite observations  ...  The vertical distributions of the dust aerosol extinction coefficient are derived from the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) lidar measurements.  ...  This research is supported by the National Science Foundation of China under grant (40628005, and 40633017) and National Basic Research Program of China (2006CB400501). Q.  ... 
doi:10.5194/acp-9-4011-2009 fatcat:ujr2gpisuzclbboajhhvxbcaya

Taklimakan dust aerosol radiative heating derived from CALIPSO observations using the Fu-Liou radiation model with CERES constraints

J. Huang, Q. Fu, J. Su, Q. Tang, P. Minnis, Y. Hu, Y. Yi, Q. Zhao
2009 Atmospheric Chemistry and Physics Discussions  
The dust aerosol radiative forcing and heating rate over the Taklimakan Desert in Northwestern China in July 2006 are estimated using the Fu-Liou radiative transfer model along with satellite observations  ...  The vertical distributions of the dust aerosol extinction coefficient are derived from the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) lidar measurements.  ...  This research is supported by the National Science Foundation of China under grant (40628005, and 40633017) and National Basic Research Program of China (2006CB400501). Q.  ... 
doi:10.5194/acpd-9-5967-2009 fatcat:iifz2y5gdndqvc3kuqb47aliva

Significant aerosol direct radiative effects during a pollution episode in northern China

J. Liu, X. Xia, P. Wang, Z. Li, Y. Zheng, M. Cribb, H. Chen
2007 Geophysical Research Letters  
The CERES data were obtained from the  ...  When the AOD at 550 nm changed from 0.1 to 2.8, the aerosol direct radiative forcing (ADRF) at the TOA changed from about À4 Wm À2 to À58 Wm À2 , and at the surface from about À20 Wm À2 to À390 Wm À2 .  ...  The continuous high-quality measurements of aerosol, cloud and radiative quantities made at this site were used to examine aerosol radiative effects at the surface Xia et al., 2007b] .  ... 
doi:10.1029/2007gl030953 fatcat:453eflwodrgyvncsrisnoaey24

First observational estimates of global clear sky shortwave aerosol direct radiative effect over land

Falguni Patadia, Pawan Gupta, Sundar A. Christopher
2008 Geophysical Research Letters  
Future studies need to separate the 20 anthropogenic component of aerosols from satellite data to 21 examine aerosol climate forcing over global scales. 22 Citation: Patadia, F., P. Gupta, and S. A.  ...  the top of atmosphere 12 cloud-free direct radiative effect (DRE) of aerosols over 13 global land areas.  ...  192 et al., 2002], and over India and China due to a combination193 of dust, smoke and pollution aerosols [Kaufman et al., 194 2002].  ... 
doi:10.1029/2007gl032314 fatcat:2yaqyclfgje4rf6vecvddrnfea

Measurement-based estimation of the spatial gradient of aerosol radiative forcing

Toshihisa Matsui, Roger A. Pielke
2006 Geophysical Research Letters  
1] This paper diagnoses the spatial mean and the spatial gradient of the aerosol radiative forcing in comparison with those of well-mixed green-house gases (GHG).  ...  For this, we diagnose the ormalized Gradient of Radiative Forcing ( GoRF), as a fraction of the present global heterogeneous insolation attributed to human activity.  ...  Rose at NASA Langley for providing the radiative transfer code packages, and Chris Castro and anonymous reviewers for valuable comments. This paper is dedicated to Yoram J.  ... 
doi:10.1029/2006gl025974 fatcat:d56ukkv3pfhqbjjveyokaqcc3m

Changes in the aerosol direct radiative forcing from 2001 to 2015: observational constraints and regional mechanisms

Fabien Paulot, David Paynter, Paul Ginoux, Vaishali Naik, Larry W. Horowitz
2018 Atmospheric Chemistry and Physics  
AM3 is evaluated against observed changes in the clear-sky shortwave direct aerosol effect (DRE<sub>sw</sub><sup>clr</sup>) derived from the Clouds and the Earth's Radiant Energy System (CERES) over polluted  ...  This is in sharp contrast to the forcing from 1850 to 2001 in which forcings by sulfate and black carbon largely cancel each other out, with minor contributions from nitrate.  ...  We thank the many researchers, who have contributed to the CERES, MODIS, and MISR products used in this study. We thank Bo Zheng and Qiang Zhang for providing MEIC gridded emissions.  ... 
doi:10.5194/acp-18-13265-2018 fatcat:mjmbqqm7kngxdkblr54j2y2wqu

Geographical features of changes in surface shortwave irradiance in East Asia estimated using the potential radiative forcing index

K. Kawamoto, T. Hayasaka
2010 Atmospheric research  
of surface shortwave irradiance (S) over East Asia in July from 2003 to 2004.  ...  Using a recently-proposed index of the potential radiative forcing (PRF), we quantified 2-dimentional relative contributions of atmospheric parameters (clouds, aerosols and precipitable water) on the change  ...  K.) was supported by a Japan Society for the Promotion of Science (JSPS) grant-in-aid for scientific research (C) and the President's discretionary funds of Nagasaki University.  ... 
doi:10.1016/j.atmosres.2009.09.016 fatcat:hycvfdan55cyfoy7ya3kqti3z4

Atmospheric Teleconnection over Eurasia Induced by Aerosol Radiative Forcing during Boreal Spring

Maeng-Ki Kim, William K. M. Lau, Mian Chin, Kyu-Myong Kim, Y. C. Sud, Greg K. Walker
2006 Journal of Climate  
The aerosol extinction coefficient, single scattering albedo, and asymmetric factor are computed as wavelength-dependent radiative forcing in the radiative transfer scheme of the fvGCM, and as a function  ...  The aerosol loading are prescribed from three-dimensional monthly distribution of tropospheric aerosols viz., sulfate, black carbon, organic carbon, soil dust, and sea salt from output of the Goddard Ozone  ...  For example, without perturbation to these fields by the dust forcing, global mean surface net radiative forcing in summer was estimated to be -2.7 Wm-2 as computed by Miller and Tegen (1998) .  ... 
doi:10.1175/jcli3871.1 fatcat:4jcvjuotsjdghjddgpc62rr7by

Climate effects of dust aerosols over East Asian arid and semiarid regions

Jianping Huang, Tianhe Wang, Wencai Wang, Zhanqing Li, Hongru Yan
2014 Journal of Geophysical Research - Atmospheres  
Compared with the aerosols of Saharan dust, those of East Asian dust are more absorptive of solar radiation, and its direct radiative forcing at the top of atmosphere is nearly positive or nil.  ...  Converting visible light to thermal energy, dust aerosols can burn clouds to produce a warming effect on climate, which is opposite to the first and second indirect effects of aerosols.  ...  Acknowledgments This work is jointly supported by the National Basic Research Program of China (2012CB955301 and 2013CB955804), the National Science Foundation of China (under grants 41375031 and 41175134  ... 
doi:10.1002/2014jd021796 fatcat:gspcjtpm6vgqjms7isn2z6476y

A Review of Modeling Approaches Accounting for Aerosol Impacts on Climate [chapter]

Abhilash S., Dong-In Lee
2012 Climate Models  
They concluded that the carbonaceous aerosol induced radiative forcing can cause the surface temperature to increase in southern china and india, and decreased the total cloud cover and precipitation over  ...  Over dark surfaces, the sum of shortwave (SW) and longwave (LW) top of the atmosphere (TOA) direct radiative forcing averaged found to −5.25 to −4.0 Wm-2 while over bright surfaces it was close to zero  ...  Subjects range from planetary-scale phenomena to regional ecology, from impacts of air pollution to the factors influencing floods and heat waves.  ... 
doi:10.5772/32261 fatcat:gsmubplisjahdei6qas7b3vecu
« Previous Showing results 1 — 15 out of 1,348 results