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Chang KE, Hsiao TC, Tsay SC, Lin TH, Griffith SM, Liu CY, Chou CCK. Embedded information of aerosol type, hygroscopicity and scattering enhancement factor revealed by the relationship between PM 2.5 and aerosol optical depth. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 867:161471. [PMID: 36634778 DOI: 10.1016/j.scitotenv.2023.161471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/16/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
Satellite aerosol optical depth (AOD) provides an alternative way to depict the spatial distribution of near-surface PM2.5. In this study, a mathematical formulation of how PM2.5 is related to AOD is presented. When simplified to a linear equation, a functional dependence of the slope on the aerosol type, scattering enhancement factor f(RH), and boundary layer height is revealed, while the influence of the vertical aerosol profile is embedded in the intercept. Specifically, we focus on the effects of aerosol properties and employ a new aerosol index (Normalized Gradient Aerosol Index, NGAI) for classifying aerosol subtypes. The combination of AOD difference at shorter wavelengths over longer-wavelength AOD from AERONET data could distinguish and subclassify aerosol types previously indistinguishable by AE (i.e., urban-industrial pollution, U/I, and biomass burning, BB). AOD-PM2.5 regressions are performed on these aerosol subtypes at various relative humidity (RH) levels. The results suggest that BB aerosols are nearly hydrophobic until the RH exceeds 80 %, while the AOD-PM2.5 regressions for U/I depend on RH levels. Moreover, the scattering enhancement factor f(RH) can be calculated by taking the ratio of intercepts between dry and humidity conditions, which is proposed and tested for the first time in this study. Our results show an f(RH ≥ 80 %) of ∼2.6 for U/I-dominated aerosols, whereas the value is not over 1.5 for BB aerosols. The f(RH) can be further used to derive the optical hygroscopicity parameter (κsca), demonstrating that the NGAI can be used to exploit differences in aerosol hygroscopicity and improve the AOD-PM2.5 relationship.
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Affiliation(s)
- Kuo-En Chang
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan; Research Centre for Environmental Changes, Academia Sinica, Taipei, Taiwan
| | - Ta-Chih Hsiao
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan; Research Centre for Environmental Changes, Academia Sinica, Taipei, Taiwan.
| | - Si-Chee Tsay
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Tang-Huang Lin
- Center for Space and Remote Sensing Research, National Central University, Taoyuan, Taiwan
| | - Stephen M Griffith
- Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan
| | - Chian-Yi Liu
- Research Centre for Environmental Changes, Academia Sinica, Taipei, Taiwan
| | - Charles C-K Chou
- Research Centre for Environmental Changes, Academia Sinica, Taipei, Taiwan
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Xia C, Sun J, Hu X, Shen X, Zhang Y, Zhang S, Wang J, Liu Q, Lu J, Liu S, Zhang X. Effects of hygroscopicity on aerosol optical properties and direct radiative forcing in Beijing: Based on two-year observations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159233. [PMID: 36208762 DOI: 10.1016/j.scitotenv.2022.159233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 09/16/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
The influence of relative humidity on aerosol properties and the direct radiative forcing of PM10 and PM1 were investigated in Beijing from January 2018 to December 2019. The annual mean scattering hygroscopic growth factor at RH = 80 % [f(80 %)] of PM10 and PM1 were 1.60 ± 0.24 and 1.58 ± 0.22, respectively. The variation of aerosol hygroscopic growth factors of PM10 and PM1 aerosols was similar, which is mainly due to the fact that aerosol scattering in Beijing is dominated by fine particles. The seasonal mean f(80 %) of PM10 from spring to winter were 1.66 ± 0.23, 1.71 ± 0.25, 1.51 ± 0.20, 1.49 ± 0.16, respectively, which were higher in spring and summer, and lower in autumn and winter. The diurnal variation of f(80 %) was relatively higher from 12:00 to 18:00, which could be related to the formation of secondary aerosols by photochemical reactions. f(80 %) shows a strong positive relationship with both the scattering Angström exponent (SAE) and the single scattering albedo (ω0) under dry conditions; therefore, the scattering hygroscopic growth factor could be estimated using these two parameters. The upscatter fraction (β) and single scattering albedo, which are the key aerosol optical properties for the calculation of direct radiative forcing, are also RH-dependent. As RH increases, the upscatter fraction (backscatter fraction) decreases and ω0 increases. The aerosol radiative forcing at RH 80 % was 1.48 times as that in the dry state. The sensitivity experiment showed that the variation in the scattering coefficient with relative humidity had the greatest influence on radiation forcing, followed by β and ω0. The seasonal variation of ΔF(80 %)/ΔF(dry) coincides with that of the aerosol hygroscopic growth factor. Our study suggests that understanding the influence of relative humidity on aerosol properties and direct radiative forcing is important for accurately estimating the radiative forcing of aerosols.
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Affiliation(s)
- Can Xia
- School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China; State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Junying Sun
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China.
| | - Xinyao Hu
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaojing Shen
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Yangmei Zhang
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Sinan Zhang
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Jialing Wang
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Quan Liu
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Jiayuan Lu
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Shuo Liu
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - Xiaoye Zhang
- State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, China
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Li J, Zhang Z, Wu Y, Tao J, Xia Y, Wang C, Zhang R. Effects of chemical compositions in fine particles and their identified sources on hygroscopic growth factor during dry season in urban Guangzhou of South China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 801:149749. [PMID: 34428665 DOI: 10.1016/j.scitotenv.2021.149749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/12/2021] [Accepted: 08/14/2021] [Indexed: 06/13/2023]
Abstract
Knowledge of aerosol hygroscopicity is essential to assess visibility improvement and aerosol radiative forcing. Aerosol hygroscopicity is highly dependent on emission sources, while the hygroscopicity of different sources remains largely unexplored. In the current study, the hygroscopic growth factor (i.e., f(RH)) and relevant chemical compositions (e.g., water-soluble inorganic ions, carbonaceous fractions and elements) in fine particles were synchronously measured for nearly 3 months within 2019-2020 in an urban site of Guangzhou. The mean value (± standard deviation) of f(RH) at 70% RH was 1.50 (± 0.11). The diurnal cycle in aerosol hygroscopic growth strongly depended on the mass fraction of hydrophilic chemical compositions (e.g., SO42-, NO3- and NH4+) in fine particles and variation in contributions of aerosol sources. A Positive Matrix Factorization model was applied to distinguish the different hygroscopicity of specific source factors in a mixed aerosol. Secondary nitrate and secondary sulfate were more hydrophilic, whereas emissions from primary combustion processes (i.e., ship emission, coal combustion and road traffic) were less hygroscopic. Soil dust was almost insoluble. The hygroscopic growth of each source was parameterized that quantified the emission sources and f(RH) relationship for use of air quality and radiative transfer models either as input or as validation.
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Affiliation(s)
- Jiwei Li
- Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhisheng Zhang
- South China Institute of Environmental Sciences, Ministry of Ecology and Environmental, Guangzhou 510655, China; Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Guangzhou 510275, China
| | - Yunfei Wu
- Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
| | - Jun Tao
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 510632, China; South China Institute of Environmental Sciences, Ministry of Ecology and Environmental, Guangzhou 510655, China; Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Guangzhou 510275, China.
| | - Yunjie Xia
- Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chaoying Wang
- Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
| | - Renjian Zhang
- Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
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Dumka UC, Kaskaoutis DG, Sagar R, Chen J, Singh N, Tiwari S. First results from light scattering enhancement factor over central Indian Himalayas during GVAX campaign. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 605-606:124-138. [PMID: 28662426 DOI: 10.1016/j.scitotenv.2017.06.138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 06/17/2017] [Indexed: 06/07/2023]
Abstract
The present work examines the influence of relative humidity (RH), physical and optical aerosol properties on the light-scattering enhancement factor [f(RH=85%)] over central Indian Himalayas during the Ganges Valley Aerosol Experiment (GVAX). The aerosol hygroscopic properties were measured by means of DoE/ARM (US Department of Energy, Atmospheric Radiation Measurement) mobile facility focusing on periods with the regular instrumental operation (November-December 2011). The measured optical properties include aerosol light-scattering (σsp) and absorption (σap) coefficients and the intensive parameters i.e., single scattering albedo (SSA), scattering Ångström exponent (SAE), absorption Ångström exponent (AAE) and light scattering enhancement factor (f(RH)=σsp(RH, λ)/σsp(RHdry, λ)). The measurements were separated for sub-micron (<1μm, D1μm) and particles with diameter<10μm (D10μm) in order to examine the influence of particle size on f(RH) and enhancement rate (γ). The particle size affects the aerosol hygroscopicity since mean f(RH=85%) of 1.27±0.12 and 1.32±0.14 are found for D10μm and D1μm, respectively. These f(RH) values are relatively low suggesting the enhanced presence of soot and carbonaceous particles from biomass burning activities, which is verified via backward air-mass trajectories. Similarly, the light-scattering enhancement rates are ~0.20 and 0.17 for the D1μm and D10μm particles, respectively. However, a general tendency for increasing f(RH) and γ is shown for higher σsp and σap values indicating the presence of rather aged smoke plumes, coated with industrial aerosols over northern India, with mean SSA, SAE and AAE values of 0.92, 1.00 and 1.15 respectively. On the other hand, a moderate-to-small dependence of f(RH) and γ on SAE, AAE, and SSA was observed for both particle sizes. Furthermore, f(RH) exhibits an increasing tendency with the number of cloud condensation nuclei (NCCN) indicating larger particle hygroscopicity but without significant dependence on the activation ratio.
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Affiliation(s)
- U C Dumka
- Aryabhatta Research Institute of observational Sciences, Nainital 263 001, India.
| | - D G Kaskaoutis
- Atmospheric Research Team, Institute for Environmental Research and Sustainable Development, National Observatory of Athens, 118 10 Athens, Greece
| | - Ram Sagar
- Aryabhatta Research Institute of observational Sciences, Nainital 263 001, India; NASI-Senior Scientist Platinum Jubilee Fellow, Indian Institute of Astrophysics, Bangalore 560 034, India
| | - Jianmin Chen
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200 433, China; Collaborative Innovation Center of Climate Change, School of Atmospheric Sciences, Nanjing University, Nanjing 210 023, China
| | - Narendra Singh
- Aryabhatta Research Institute of observational Sciences, Nainital 263 001, India
| | - Suresh Tiwari
- Indian Institute of Tropical Meteorology, Pune, New Delhi Branch, New Delhi 110 060, India
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Wu Y, Wang X, Yan P, Zhang L, Tao J, Liu X, Tian P, Han Z, Zhang R. Investigation of hygroscopic growth effect on aerosol scattering coefficient at a rural site in the southern North China Plain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 599-600:76-84. [PMID: 28463703 DOI: 10.1016/j.scitotenv.2017.04.194] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 04/25/2017] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
Aerosol optical properties and the effect of hygroscopic growth on the scattering coefficients at a rural site in the southern North China Plain were investigated based on a two-month observation conducted in the summer of 2014. The scattering coefficient of dry aerosols was high, with a mean (±standard deviation) of 338.8±209.9Mm-1 (520nm) during the observation period. A noticeable enhancement in aerosol scattering due to hygroscopic growth was observed, e.g., by a factor of 2.28±0.69 at RH of 80% (referred to as f(RH=80%)) and 3.39±1.14 at RH of 85% (f(RH=85%)). The high content of water-soluble secondary inorganic aerosols (SIAs), accounting for 53.1% of fine particulate matter (i.e., PM2.5) on average, was mainly responsible for the high hygroscopicity. f(RH=80%) increased with increasing SIA mass fraction in PM2.5. This was especially the case when SIAs were mainly in finer particulate matter, i.e., PM1. A number of considerably low f(RH=80%) values was observed due to relatively low mass fraction of SIAs in PM1 despite high fraction in PM2.5. Particle size distributions, especially those of SIAs, also played a remarkable role in the hygroscopicity of ambient aerosols. No significant difference in hygroscopicity was found between different pollution episodes due to the dominance of SIAs in all the cases. Slightly higher hygroscopic growth factors were observed during the clean episode, which were attributed to the smaller particle sizes.
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Affiliation(s)
- Yunfei Wu
- CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
| | - Xiaojia Wang
- CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
| | - Peng Yan
- CAWAS, Meteorological Observation Center of Chinese Meteorological Administration, Beijing, China
| | - Leiming Zhang
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Canada
| | - Jun Tao
- South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China
| | - Xinyu Liu
- CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, China
| | - Ping Tian
- Beijing Weather Modification Office, Beijing, China
| | - Zhiwei Han
- CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
| | - Renjian Zhang
- CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.
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Deng H, Tan H, Li F, Cai M, Chan PW, Xu H, Huang X, Wu D. Impact of relative humidity on visibility degradation during a haze event: A case study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 569-570:1149-1158. [PMID: 27395081 DOI: 10.1016/j.scitotenv.2016.06.190] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/23/2016] [Accepted: 06/23/2016] [Indexed: 06/06/2023]
Abstract
Light scattering of aerosols depends on ambient relative humidity (RH) since hygroscopic particles absorb significant water at high RH, and this results in low visibility. This paper used custom-made parallel nephelometers (PNEPs) to measure aerosol light scattering enhancement factor ƒ(RH), and utilized data including visibility, PM2.5, black carbon, water-soluble ions mass concentrations and surface meteorological parameters, in conjunction with background weather conditions, to analyze a haze event in Guangzhou during 8th-15th Dec. 2013. Unfavorable weather conditions, such as high RH and low wind speed, were observed during the haze event. The hourly average mass concentration of PM2.5 was 127μg/m(3), with concentration of 192.4μg/m(3) on 9th and 196μg/m(3) on 13th. The ƒ(RH) did not exhibit significant changes during this haze process, with value of ƒ(80%)=1.58±0.07. Although the mass fraction of water-soluble ions to PM2.5 decreased after 12th Dec., the aerosol hygroscopicity might not have changed significantly since the mass fraction of nitrate became more dominant, which has stronger ability to take up water. The best-fitted parameterized function for ƒ(RH) is ƒ(RH)=0.731+0.1375∗(1-RH/100)(-1)+0.00719∗(1-RH/100)(-2). Combining the fixed parameterization of ƒ(RH) above, the visibility was calculated with the measured light scattering and absorption coefficient of particles and gas under dry condition, as well as ambient RH. The predicted visibility range agrees well with the measurements without precipitation. Using ISORROPIA II model, the calculated aerosol liquid water content (ALWC) at ambient RH varied consistently with the PM2.5 under lower RH, while it was more influenced by high RH. This work also show that high RH accompanied with precipitation will enhance aerosol hygroscopic growth effect, leading to further visibility degradation, even if PM2.5 mass decreased due to precipitation.
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Affiliation(s)
- Hua Deng
- Guangdong Ecological Meteorology Center, Guangzhou 510080, China
| | - Haobo Tan
- Guangdong Ecological Meteorology Center, Guangzhou 510080, China; Key Laboratory of Regional Numerical Weather Prediction, Guangzhou Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou 510080, China.
| | - Fei Li
- Key Laboratory of Regional Numerical Weather Prediction, Guangzhou Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou 510080, China
| | - Mingfu Cai
- Sun Yat-Sen University, Guangzhou 510275, China
| | - P W Chan
- Hong Kong Observatory, Hong Kong, China
| | - Hanbing Xu
- Sun Yat-Sen University, Guangzhou 510275, China
| | - Xiaoying Huang
- Guangzhou Central Meteorological Observatory, Guangzhou 510080, China
| | - Dui Wu
- Jinan University, Guangzhou, 510632, China
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Jung J, Kim YJ. Tracking sources of severe haze episodes and their physicochemical and hygroscopic properties under Asian continental outflow: Long-range transport pollution, postharvest biomass burning, and Asian dust. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jd014555] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jeong MJ, Li Z. Separating real and apparent effects of cloud, humidity, and dynamics on aerosol optical thickness near cloud edges. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd013547] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Liu X, Zhang Y, Jung J, Gu J, Li Y, Guo S, Chang SY, Yue D, Lin P, Kim YJ, Hu M, Zeng L, Zhu T. Research on the hygroscopic properties of aerosols by measurement and modeling during CAREBeijing-2006. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jd010805] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ramachandran S, Rajesh TA. Asymmetry parameters in the lower troposphere derived from aircraft measurements of aerosol scattering coefficients over tropical India. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008jd009795] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ramanathan V, Li F, Ramana MV, Praveen PS, Kim D, Corrigan CE, Nguyen H, Stone EA, Schauer JJ, Carmichael GR, Adhikary B, Yoon SC. Atmospheric brown clouds: Hemispherical and regional variations in long-range transport, absorption, and radiative forcing. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd008124] [Citation(s) in RCA: 342] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Michalsky JJ, Anderson GP, Barnard J, Delamere J, Gueymard C, Kato S, Kiedron P, McComiskey A, Ricchiazzi P. Shortwave radiative closure studies for clear skies during the Atmospheric Radiation Measurement 2003 Aerosol Intensive Observation Period. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006341] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ferrare R, Turner D, Clayton M, Schmid B, Redemann J, Covert D, Elleman R, Ogren J, Andrews E, Goldsmith JEM, Jonsson H. Evaluation of daytime measurements of aerosols and water vapor made by an operational Raman lidar over the Southern Great Plains. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd005836] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Andrews E, Sheridan PJ, Fiebig M, McComiskey A, Ogren JA, Arnott P, Covert D, Elleman R, Gasparini R, Collins D, Jonsson H, Schmid B, Wang J. Comparison of methods for deriving aerosol asymmetry parameter. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2004jd005734] [Citation(s) in RCA: 191] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Chazette P. Optical properties of urban aerosol from airborne and ground-based in situ measurements performed during the Etude et Simulation de la Qualité de l'air en Ile de France (ESQUIF) program. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jd004810] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Andrews E, Sheridan PJ, Ogren JA, Ferrare R. In situ aerosol profiles over the Southern Great Plains cloud and radiation test bed site: 1. Aerosol optical properties. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jd004025] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Elisabeth Andrews
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Climate Monitoring and Diagnostics Laboratory, National Oceanic and Atmospheric Administration; Boulder Colorado USA
| | - Patrick J. Sheridan
- Climate Monitoring and Diagnostics Laboratory, National Oceanic and Atmospheric Administration; Boulder Colorado USA
| | - John A. Ogren
- Climate Monitoring and Diagnostics Laboratory, National Oceanic and Atmospheric Administration; Boulder Colorado USA
| | - Richard Ferrare
- Chemistry and Dynamics Branch, Atmospheric Sciences Research, NASA Langley Research Center; Hampton Virginia USA
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Jordan CE, Anderson BE, Talbot RW, Dibb JE, Fuelberg HE, Hudgins CH, Kiley CM, Russo R, Scheuer E, Seid G, Thornhill KL, Winstead E. Chemical and physical properties of bulk aerosols within four sectors observed during TRACE-P. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd003337] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- C. E. Jordan
- National Research Council, NASA Langley Research Center; Hampton Virginia USA
| | - B. E. Anderson
- Atmospheric Sciences Competency, NASA Langley Research Center; Hampton Virginia USA
| | - R. W. Talbot
- Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space; University of New Hampshire; Durham New Hampshire USA
| | - J. E. Dibb
- Climate Change Research Center, Institute for the Study of Earth, Oceans, and Space; University of New Hampshire; Durham New Hampshire USA
| | - H. E. Fuelberg
- Department of Meteorology; Florida State University; Tallahassee Florida USA
| | - C. H. Hudgins
- Atmospheric Sciences Competency, NASA Langley Research Center; Hampton Virginia USA
| | - C. M. Kiley
- Department of Meteorology; Florida State University; Tallahassee Florida USA
| | - R. Russo
- Climate Change Research Center, Institute for the Study of Earth, Oceans, and Space; University of New Hampshire; Durham New Hampshire USA
| | - E. Scheuer
- Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space; University of New Hampshire; Durham New Hampshire USA
| | - G. Seid
- Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space; University of New Hampshire; Durham New Hampshire USA
| | | | - E. Winstead
- GATS, NASA Langley Research Center; Hampton Virginia USA
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Müller D. Indo-Asian pollution during INDOEX: Microphysical particle properties and single-scattering albedo inferred from multiwavelength lidar observations. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2003jd003538] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Masonis SJ. An intercomparison of aerosol light extinction and 180° backscatter as derived using in situ instruments and Raman lidar during the INDOEX field campaign. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2000jd000035] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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