Validation of MODIS, MISR, OMI, and CALIPSO aerosol optical thickness using ground-based sunphotometers in Hong Kong

Wong, Man Sing; Shahzad, Muhammad Imran; Nichol, Janet Elizabeth; Lee, Kwon-Ho; Chan, Pak Wai

doi:10.1080/01431161.2012.720739

Cited by 19 publications

(9 citation statements)

References 49 publications

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“…The data analyzes were supported with observations from a Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) mounted onboard a Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite (Wong et al 2013). In addition, a Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT) (Draxler and Rolph 2010) is used to describe the origin of the air masses.…”

Section: Other Datamentioning

confidence: 99%

Modelling and Observation of Mineral Dust Optical Properties over Central Europe

et al. 2016

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This paper is focused on Saharan dust transport to Central Europe/ Poland; we compare properties of atmospheric Saharan dust using data from NAAPS, MACC, AERONET as well as observations obtained during HyMountEcos campaign in June 2012. Ten years of dust climatology shows that long-range transport of Saharan dust to Central Europe is mostly during spring and summer. HYSPLIT back-trajectories indicate airmass transport mainly in November, but it does not agree with modeled maxima of dust optical depth. NAAPS model shows maximum of dust optical depth (~0.04-0.05, 550 nm) in April-May, but the MACC modeled peak is broader (~0.04). During occurrence of mineral dust over Central-Europe for 14% (NAAPS) / 12% (MACC) of days dust optical depths are above 0.05 and during 4% (NAAPS) / 2.5% (MACC) of days in June-July 2012 in the mountainous region of Karkonosze. The analysis includes remote sensing data from lidars, sunphotometers, and numerical simulations from NAAPS, MACC, DREAM8b models. Comparison of simulations with observations demonstrates the ability of models to reasonably reproduce aerosol vertical distributions and their temporal variability. However, significant differences between simulated and measured AODs were found. The best agreement was achieved for MACC model.

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Section: Other Datamentioning

confidence: 99%

Modelling and Observation of Mineral Dust Optical Properties over Central Europe

et al. 2016

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“…Note that differences exist between MISR and MODIS derived AOD also. This is mainly due to the different procedures followed by the two sensors for retrieval of AOD (Prasad and Singh, 2007;Cheng et al, 2012;Wong et al, 2013).…”

Section: Methodsmentioning

confidence: 99%

Quantitative assessment of AOD from 17 CMIP5 models based on satellite-derived AOD over India

2016

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Abstract. Aerosol optical depth (AOD) values from 17 CMIP5 models are compared with Moderate Resolution Imaging Spectroradiometer (MODIS) and Multiangle Imaging Spectroradiometer (MISR) derived AODs over India. The objective is to identify the cases of successful AOD simulation by CMIP5 models, considering satellite-derived AOD as a benchmark. Six years of AOD data (2000)(2001)(2002)(2003)(2004)(2005) from MISR and MODIS are processed to create quality-assured gridded AOD maps over India, which are compared with corresponding maps of 17 CMIP5 models at the same grid resolution. Intercomparison of model and satellite data shows that model-AOD is better correlated with MISR-derived AOD than MODIS. The correlation between model-AOD and MISR-AOD is used to segregate the models into three categories identifying their performance in simulating the AOD over India. Maps of correlation between model-AOD and MISR-/MODIS-AOD are generated to provide quantitative information about the intercomparison. The two sets of data are examined for different seasons and years to examine the seasonal and interannual variation in the correlation coefficients. Latitudinal and longitudinal variations in AOD as simulated by models are also examined and compared with corresponding variations observed by satellites.

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“…This study uses level 2.0 quality assured and cloud screened AERONET data from Lahore and Karachi stations for years 2006-2013. AERONET AOD level 2.0 data from NASA website was downloaded with in ± 30 minutes of the satellite pass time for Lahore and Karachi stations [17] and compared with satellite based AOD extracted at 5x5 pixel (spatial) window over Lahore and Karachi's AERONET stations. This data was used to validate the satellite based AOD retrieved from MODIS, MISR, OMI and CALIPSO at spatial resolutions of 550 nm, 558 nm, 532 nm and 342nm respectively (Table 1).…”

Section: Data Used and Applied Research Methodologymentioning

confidence: 99%

“…MISR sensor was launched into polar Earth orbit aboard the Terra spacecraft in December 1999 to provide an AOD product (MISR_AM1_AS_AEROSOL) at spatial resolution of 17.1 km 2 on every 17 days [26]. Another sensor OMI with advance viewing capabilities is an inheritor of instruments such as the Total Ozone Mapping Spectrometer (TOMS) and provides an AOD product OMI_Aura_L3_OMAEROe at a spatial resolution of 27.8 km 2 [17]. Unlike previous sensors, CALIPSO provides vertical profiles of aerosol loading as well along with spatial and optical properties of aerosols and clouds at footprint of 5 km 2 in form of its AOD product (CAL_LID_L2_05kmAPro_Prov_V3) [27].…”

Section: Data Used and Applied Research Methodologymentioning

confidence: 99%

“…Different algorithms have been developed globally to retrieve AOD from satellite sensors over; water [14], vegetation, [15], bright surfaces such as deserts [16], and complex surfaces such as urban areas [17]. Although most of these algorithms are robust at global level but still, there remains uncertainty as to the prevailing optical and physical characteristics of urban aerosol experienced under each set of meteorological conditions [17]. Globally these AOD data are validated against ground based AERONET which is managed by NASA [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Aerosol Optical Depth Products from Multi-Satellites over Densely Populated Cities of Pakistan

Butt

Shahzad

Khalid

et al. 2018

ILNS

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Air pollution in Pakistan is causing damage to health, environment and quality of life. Air pollution in Pakistan is not effectively monitored due to heavy cost involved in setting up ground stations. However, Satellite remote sensing can effectively monitor the air pollution in terms of Aerosol Optical Depth (AOD) at regional as well as global level. However, algorithms used to derive AOD from different sensors have some inherited differences which can pose challenges in monitoring regional AOD at high temporal resolution using more than one sensor. Therefore, this study focuses on comparison of four major satellite based AOD products namely Moderate Resolution Imaging SpectroRadiometer (MODIS), Multi-angle Imaging SpectroRadiometer (MISR), Ozone Monitoring Instrument multiwavelength (OMI) aerosol product and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) with the ground based AErosol RObotic NETwork (AERONET) AOD which is only available from Lahore and Karachi in Pakistan. The correlation of various AOD products with AERONET AOD is estimated statistically through coefficient of determination (R 2 ), Root Mean Square Error (RMSE), slope and intercept. It is noticed that MODIS is relatively accurate and reliable for monitoring air quality on operational bases over the land cover area of Lahore (R 2 = 0.78; RMSE = 0.18), whereas MISR over the coastal areas of Karachi (R 2 = 0.82; RMSE = 0.20). The results of the study will help the stakeholders in planning additional ground stations for operational monitoring of air quality at regional level.

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Validation of MODIS, MISR, OMI, and CALIPSO aerosol optical thickness using ground-based sunphotometers in Hong Kong

Cited by 19 publications

References 49 publications

Modelling and Observation of Mineral Dust Optical Properties over Central Europe

Modelling and Observation of Mineral Dust Optical Properties over Central Europe

Quantitative assessment of AOD from 17 CMIP5 models based on satellite-derived AOD over India

Comparison of Aerosol Optical Depth Products from Multi-Satellites over Densely Populated Cities of Pakistan

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