Aerosol optical properties based on ground measurements over the Chinese Yangtze Delta Region

Pan, Liang; Che, Huizheng; Geng, Feng; Xia, Xiangao; Wang, Yaqiang; Zhu, Chize; Chen, Min; Gao, Wei; Guo, Jianping

doi:10.1016/j.atmosenv.2010.04.013

Cited by 107 publications

(65 citation statements)

References 33 publications

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“…5(b), followed by that in autumn, and the aerosol particles presented largest values in spring. The seasonal variation of AOD and α derived by MODIS is consistent with those recent observations using Cimel sunphotometer data in the YRD of China (Che et al, 2009;Pan et al, 2010). Seasonal and spatial variations of derived AOD from MODIS were related to Asian dust and anthropogenic emission patterns in spring, but modified by precipitation in summer.…”

Section: Seasonal Characteristics Of Aod Over East Chinasupporting

confidence: 76%

Study on Long-term Aerosol Distribution over the Land of East China Using MODIS Data

Geng

et al. 2012

Aerosol Air Qual. Res.

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East China is among the fastest developing area in Asia, where atmospheric aerosol loading is high due to heavy urban and industrial emission. The Moderate Resolution Imaging Spectroradiometer (MODIS) level 2 aerosol products (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007) were used to study aerosol spatial and temporal distributions, as well as their variations with local meteorological conditions over East China. By combining Aerosol Optical Depth (AOD) and aerosol Fine Mode Fraction (FMF), we found that the urban/industrial aerosol and soil dust are possibly two dominant species over northern part, whereas continental and marine aerosols possibly dominate the southern part of East China. Both annual mean AOD and area with high AOD increased from 2000 to 2007, with the largest increase seen in Yangtze River Delta region (YRD). In summer, AOD in East China reached the maximum of about 0.8 in YRD, dominated by fine mode particles. The minimum AOD occurred in winter with mostly coarse mode particles. Local aerosol properties were analyzed in three typical zones: the northern dry zone (I), the central urban/industrial zone (II) and the southern natural background zone (III). Monthly mean AODs in zone I and II were above 0.5 throughout the entire year, with the maximum AOD in June. High FMFs in this period indicated heavy urban and industrial pollution. Monthly mean AODs and FMFs in zone III reached maximum of 0.51 in April and September (up to 90.7%) respectively. High AOD in spring in zone III appears mostly due to the long-range dust transport from the North.

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Section: Seasonal Characteristics Of Aod Over East Chinasupporting

confidence: 76%

Study on Long-term Aerosol Distribution over the Land of East China Using MODIS Data

Geng

et al. 2012

Aerosol Air Qual. Res.

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“…Just like the Aerosol Robotic Network (AERONET), CARSNET has become a major resource for validating and analyzing aerosol properties over different areas of China [38]. There are similar accuracies for retrieving AOD between CARSNET and AERONET; for example, the bias for AOD between Lin'an (CARSNET) and ZFU (AERONET), two ground sites nearby YRD, is less than 0.02 [39]. The CARSNET retrieved AOD using the sun-photometer CE318 every 15 min at 4 wavelengths (440, 670, 870 and 1020 nm) for Level-1.0 (unscreened) and Level-1.5 (cloud-screened) data [40].…”

Section: Satellite and Ground Datamentioning

confidence: 85%

Aerosol Optical Properties and Associated Direct Radiative Forcing over the Yangtze River Basin during 2001–2015

Wang

Lin

et al. 2017

Remote Sensing

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Abstract:The spatiotemporal variation of aerosol optical depth at 550 nm (AOD 550 ), Ångström exponent at 470-660 nm (AE ), water vapor content (WVC), and shortwave (SW) instantaneous aerosol direct radiative effects (IADRE) at the top-of-atmosphere (TOA) in clear skies obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) and Clouds and the Earth's Radiant Energy System (CERES) are quantitatively analyzed over the Yangtze River Basin (YRB) in China during [2001][2002][2003][2004][2005][2006][2007][2008][2009][2010][2011][2012][2013][2014][2015]. The annual and seasonal frequency distributions of AE and AOD 550 reveal the dominance of fine aerosol particles over YRB. The regional average AOD 550 is 0.49 ± 0.31, with high value in spring (0.58 ± 0.35) and low value in winter (0.42 ± 0.29). The higher AOD 550 (≥0.6) is observed in midstream and downstream regions of YRB and Sichuan Basin due to local anthropogenic emissions and long-distance transport of dust particles, while lower AOD 550 (≤0.3) is in high mountains of upstream regions. The IADRE is estimated using a linear relationship between SW upward flux and coincident AOD 550 from CERES and MODIS at the satellite passing time. The regional average IADRE is −35.60 ± 6.71 Wm −2 , with high value (−40.71 ± 6.86 Wm −2 ) in summer and low value (−29.19 ± 7.04 Wm −2 ) in winter, suggesting a significant cooling effect at TOA. The IADRE at TOA is lower over Yangtze River Delta (YRD) (≤−30 Wm −2 ) and higher in midstream region of YRB, Sichuan Basin and the source area of YRB (≥−45 Wm −2 ). The correlation coefficient between the 15-year monthly IADRE and AOD 550 values is 0.63, which confirms the consistent spatiotemporal variation patterns over most of the YRB. However, a good agreement between IADRE and AOD is not observed in YRD and the source area of YRB, which is probably due to the combined effects of aerosol and surface properties.

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“…The accuracy and coherence of aerosol retrievals for its C005 version show significant improvement after several times optimization of retrieval algorithm [24][25][26][27]. The relationship between MODIS retrieved and ground-based measured AOD shows good agreement over well vegetated areas in China with more than 50% of the MODIS AODs fall within the ex-pected error envelope [28,29]. What's more, AODs derived from MODIS data are somewhat more accurate than that derived from MISR and OMI in desert area [30].…”

Section: Datamentioning

confidence: 99%

Analysis of variation trends and causes of aerosol optical depth in Shaanxi Province using MODIS data

Dong

et al. 2013

Chin. Sci. Bull.

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Aerosol optical properties based on ground measurements over the Chinese Yangtze Delta Region

Cited by 107 publications

References 33 publications

Study on Long-term Aerosol Distribution over the Land of East China Using MODIS Data

Study on Long-term Aerosol Distribution over the Land of East China Using MODIS Data

Aerosol Optical Properties and Associated Direct Radiative Forcing over the Yangtze River Basin during 2001–2015

Analysis of variation trends and causes of aerosol optical depth in Shaanxi Province using MODIS data

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