Shaun W. Bell
Goddard Space Flight Center
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Publication
Featured researches published by Shaun W. Bell.
Journal of Geophysical Research | 2010
Can Li; Si-Chee Tsay; Joshua S. Fu; Russell R. Dickerson; Qiang Ji; Shaun W. Bell; Yang Gao; Wu Zhang; Jianping Huang; Zhanqing Li; Hongbin Chen
anthropogenic emissions. Sizable aerosol mass concentration (153 mg/m 3 ) and light scattering (159 Mm −1 at 500 nm) were largely attributable to dust emissions, and aerosol light absorption (10.3 Mm −1 at 500 nm) was dominated by anthropogenic pollution. Distinct diurnal variations in meteorology and pollution were induced by the local valley terrain. Strong daytime northwest valley wind cleaned out pollution and was replaced by southeast mountain wind that allowed pollutants to build up overnight. In the afternoon, aerosols had single scattering albedo (SSA, 500 nm) of 0.95 and were mainly of supermicron particles, presumably dust, while at night smaller particles and SSA of 0.89–0.91 were related to pollution. The diverse local emission sources were characterized: the CO/SO2, CO/NOy, NOy/SO2 (by moles), and BC/CO (by mass) ratios for small point sources such as factories were 24.6–54.2, 25.8–35.9, 0.79–1.31, and 4.1– 6.1 ×1 0 −3 , respectively, compared to the corresponding inventory ratios of 43.7–71.9, 23.7–25.7, 1.84–2.79, and 3.4– 4.0 ×1 0 −3 for the industrial sector in the area. The mixing between dust and pollution can be ubiquitous in this region. During a dust storm shown as an example, pollutants were observed to mix with dust, causing discernible changes in both SSA and aerosol size distribution. Further interaction between dust and pollutants during transport may modify the properties of dust particles that are critical for their large‐scale impact on radiation, clouds, and global biogeochemical cycles.
Computational Optical Sensing and Imaging | 2011
Richard A. Hansell; Si-Chee Tsay; Christina N. Hsu; Qiang Ji; Shaun W. Bell; Wu Zhang; Jianping Huang; Zhanqing Li; Hongbin Chen
Longwave direct radiative effects of mineral dust are investigated during previous field campaigns. Surface measurements and radiative transfer modeling are employed for probing dust radiative impacts for regions frequented by dust aerosol.
Atmospheric Chemistry and Physics | 2011
Ritesh Gautam; N. C. Hsu; Si-Chee Tsay; K.-M. Lau; Brent N. Holben; Shaun W. Bell; A. Smirnov; Can Li; Richard A. Hansell; Qiang Ji; S. Payra; D. Aryal; Rijan Bhakta Kayastha; K. M. Kim
Atmospheric Environment | 2011
Sheng-Hsiang Wang; Si-Chee Tsay; Neng-Huei Lin; Shaun W. Bell; Can Li; Qiang Ji; Myeong-Jae Jeong; Richard A. Hansell; Ellsworth J. Welton; Brent N. Holben; Guey-Rong Sheu; Yu-Chi Chu; Shuenn-Chin Chang; Jyh-Jian Liu; Wei-Li Chiang
Atmospheric Environment | 2013
Can Li; Si-Chee Tsay; Jin Young Kim; S. Howell; Barry J. Huebert; Qiang Ji; Myeong-Jae Jeong; Sheng-Hsiang Wang; Richard A. Hansell; Shaun W. Bell
Journal of Geophysical Research | 2012
Richard A. Hansell; Si-Chee Tsay; Qiang Ji; Shaun W. Bell; Brent N. Holben; Ellsworth J. Welton; Ted L. Roush; Wanchun Zhang; Jianping Huang; Zhanqing Li; H. Chen
Environmental Monitoring and Assessment | 2013
Sunita Verma; Swagata Payra; Ritesh Gautam; Divya Prakash; Manish Soni; Brent N. Holben; Shaun W. Bell
Atmospheric Environment | 2013
Sheng-Hsiang Wang; Si-Chee Tsay; Neng-Huei Lin; Shuenn-Chin Chang; Can Li; Ellsworth J. Welton; Brent N. Holben; William K. M. Lau; Simone Lolli; Chun-Chiang Kuo; Hao-Ping Chia; Chia-Yang Chiu; Chia-Ching Lin; Shaun W. Bell; Qiang Ji; Richard A. Hansell; Guey-Rong Sheu; Kai Hsien Chi; Chi-Ming Peng
Atmospheric Environment | 2013
Shaun W. Bell; Richard A. Hansell; Judith C. Chow; Si-Chee Tsay; Neng-Huei Lin; Sheng-Hsiang Wang; Qiang Ji; Can Li; John G. Watson; Andrey Khlystov
Atmospheric Chemistry and Physics | 2012
Ritesh Gautam; N. C. Hsu; Si-Chee Tsay; K.-M. Lau; Brent N. Holben; Shaun W. Bell; A. Smirnov; Can Li; Richard A. Hansell; Qiang Ji; S. Payra; D. Aryal; Rijan Bhakta Kayastha; K. M. Kim