The assessment of aerosol optical properties over Mohal in the northwestern Indian Himalayas using satellite and ground-based measurements and an influence of aerosol transport on aerosol radiative forcing

Guleria, Raj Paul; Kuniyal, Jagdish Chandra; Rawat, P. S.; Sharma, Nand Lal; Thakur, Harinder Kumar; Dhyani, P. P.; Singh, Mahavir

doi:10.1007/s00703-011-0149-5

Cited by 41 publications

(25 citation statements)

References 71 publications

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“…However, the Terra and Aqua MODIS were found to consistently underestimate AOD with respect to the MICROTOPS-II sunphotometer, with slope values of 0.805 (Terra) and 0.767 (Aqua). Gulleria et al (2011) observed the correlation coefficient of 0.76 using daily level 3 MODIS Terra AOD and ground based multi-wavelength radiometer (MWR) data over Mohal, located in the Kullu valley of north-western part of the Indian Himalayas. reported correlation coefficient of 0.29 and 0.47 respectively for summer and winter season based on a validation exercise carried out using daily level 3 MODIS Terra AOD and AERONET data over Kanpur located in IGB.…”

Section: Resultsmentioning

confidence: 99%

Variability of Aerosol Parameters Derived from Ground and Satellite Measurements over Varanasi Located in the Indo-Gangetic Basin

Tiwari

2013

Aerosol Air Qual. Res.

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Atmospheric aerosol plays a very important role in the Earth's radiation budget and global climate studies. This study reports the variability of the physical and optical properties of columnar aerosol and water vapour over Varanasi (25.2°N, 82.9°E), located in the heart of the Indo-Gangetic Basin, for the first time. The study was carried out using a MICROTOPS-II sunphotometer to measure the Aerosol Optical Depth (AOD) and metrological parameters. It is observed that the AOD loading is enhanced during the pre-monsoon and winter seasons, while it is decreased during the monsoon season. The variability of the angstrom coefficient (α) and turbidity coefficient (β) shows that in the pre-monsoon season coarse-mode aerosol particles are dominant, while fine-mode aerosol particles are dominant in the winter. We compared our MICROTOPS-II ground-based data with the level-3 data from the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Terra satellite. A good seasonal correlation (correlation coefficient, R 2 ~0.57) was observed between MICROTOPS-II and MODIS AOD data. The results of the variability of water vapor over Varanasi are also discussed. The correlation coefficient (R 2 ) between daily MICROTOPS-II and MODIS water vapor is found to be more than 0.85 for the year 2011.

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Section: Resultsmentioning

confidence: 99%

Variability of Aerosol Parameters Derived from Ground and Satellite Measurements over Varanasi Located in the Indo-Gangetic Basin

Tiwari

2013

Aerosol Air Qual. Res.

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“…The main source of suspended dust is the arid and desert areas over the globe (Prospero et al, 2002;Ginoux et al, 2012;Crosbie et al, 2014), while depending on the wind field dust is transported from one continent to another (Liu et al, 2012;Nastos, 2012). Middle East, Arabia, southwest Asia, and Thar desert are the main sources for dust which are transported over the IGB depending upon the intensity of westerly winds and meteorological conditions Sharma et al, 2012;Gharai et al, 2013;Aher et al, 2014;Kaskaoutis et al, in press-a), western Himalayan range (Hegde et al, 2007;Guleria et al, 2011;Srivastava et al, 2011a;Kumar et al, 2014) and beyond to the far east up to the Everest region and Darjeeling (Duchi et al, 2011;Chatterjee et al, 2012), hundreds to thousands of kilometers away from the dust source. These dust storms modify the atmospheric composition, meteorological parameters and aerosol optical properties, as well as the radiation balance, heating rates and atmospheric stability over Indian sub-continent (Bhattacharjee et al, 2007;Gautam et al, 2009aGautam et al, , 2010Gautam et al, , 2013Kaskaoutis et al, 2012Kaskaoutis et al, , 2013 Dust storms are common over the north-western parts of India during the pre-monsoon (April-June) season Das et al, in press-a), with more than 10 events per year, whose influence is progressively reducing towards the downwind areas (eastern IGB), where only 5 events, on an average, can be considered as dust storms as per the criteria of World Meteorological Organization (visibility < 1000 m) (Middleton, 1986).…”

Section: Introductionmentioning

confidence: 97%

Meteorological, atmospheric and climatic perturbations during major dust storms over Indo-Gangetic Basin

Kumar

Kaskaoutis

et al. 2015

Aeolian Research

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“…The study on aerosol transport carried out by [9] [10] [11] [12] at Mohal in the northwestern region of the Indian Himalaya infers that this region gets influenced by dust aerosols due to its transport from the western deserts. The comprehension of the variability in the ASD is the main concern to measure the radiative effect of aerosol, but it is a difficult task due to insufficient information [13].…”

Section: Introductionmentioning

confidence: 99%

Importance of Aerosol Optical Depth in the Atmospheric Correction of Ocean Colour Remote Sensing Data

Laxmi¹,

Sonnati²,

Nagamani³

et al. 2017

OJMS

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Atmospheric aerosols being an important component of the atmosphere play an important role in global and regional climate change. Aerosols can affect air quality, climate change and human health and have a significant effect on the solar energy budget. To study their quantitative effect is a challenging task due to their high spatial and temporal variability. This parameter represents one of the extinction coefficients of solar radiation and rate of suspended particles in the atmosphere. Ocean Colour Remote Sensing provides information about the four major geophysical parameters like chlorophyll and total suspended sediment concentration, vertical diffuse attenuation co-efficient and the aerosol optical thickness measured at 865 nm. , where " α " and " β " are known as Angstrom parameters. The Angstrom exponent, " α " is related to the size distribution of the aerosol particles and " β " represents the amount of aerosols present in the atmosphere. In this present study, an attempt is made to study the impact of these two parameters by changing values from 0 to 0.05 for " α " and from 0.0 to 0.6 for " β " in SeaDAS processing for estimating the aerosol optical depth. From this study, it is clear that for most of the applications either in the coastal or open ocean waters, alpha value varies from 0.0 to 0.3 over the north Indian Ocean. However, this has been further evaluated by various combinations for retrieving the AOD using OCM-2 data.

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The assessment of aerosol optical properties over Mohal in the northwestern Indian Himalayas using satellite and ground-based measurements and an influence of aerosol transport on aerosol radiative forcing

Cited by 41 publications

References 71 publications

Variability of Aerosol Parameters Derived from Ground and Satellite Measurements over Varanasi Located in the Indo-Gangetic Basin

Variability of Aerosol Parameters Derived from Ground and Satellite Measurements over Varanasi Located in the Indo-Gangetic Basin

Meteorological, atmospheric and climatic perturbations during major dust storms over Indo-Gangetic Basin

Importance of Aerosol Optical Depth in the Atmospheric Correction of Ocean Colour Remote Sensing Data

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