Analysis of Multi‐angle Imaging SpectroRadiometer (MISR) aerosol optical depths over greater India during winter 2001–2004

Girolamo, Larry Di; Bond, Tami C.; Bramer, D. J.; Diner, David J.; Fettinger, F.; Kahn, Ralph A.; Martonchik, John V.; Ramana, M. V.; Ramanathan, V.; Rasch, Philip J.

doi:10.1029/2004gl021273

Cited by 212 publications

(165 citation statements)

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“…The more common aerosol loading indicator, i.e. Aerosol Optical Depth (AOD), has been used in several studies to elucidate the high pollution levels in the region (Massie et al, 2004;Girolamo et al, 2004;Prasad et al, 2004). The detailed characterization of seasonal aerosol loading over single location in IGP, Kanpur (26.45 • N, 80.34 • E), has been documented which has been made possible through NASA's AERONET program (Holben et al, 1998).…”

Section: R Gautam Et Al: Aerosol and Rainfall Variability Over The mentioning

confidence: 99%

“…During spring and summer seasons, dust aerosols are transported from the northwestern arid regions to the IGP (Middleton, 1986;Prospero et al, 2002). On the other hand, fine-mode pollution particles such as soot and sulfate form the bulk of the regional atmospheric loading resulting in dense haze and foggy conditions during winter months (Girolamo et al, 2004;Prasad et al, 2006;. Heavy dust loading results in maximum column AOD during pre-monsoon period, while contribution of fine mode pollution aerosols to the total optical depth, such as sulfate and soot, is highest during the post-monsoon and winter period.…”

Section: Inter-annual Variabilitymentioning

confidence: 99%

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Aerosol and rainfall variability over the Indian monsoon region: distributions, trends and coupling

et al. 2009

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Abstract. Aerosol solar absorption over the Indian monsoon region has a potential role of modulating the monsoon circulation and rainfall distribution as suggested by recent studies based on model simulations. Prior to the onset of the monsoon, northern India is influenced by significant dust transport that constitutes the bulk of the regional aerosol loading over the Gangetic-Himalayan region. In this paper, a multi-sensor characterization of the increasing premonsoon aerosol loading over northern India, in terms of their spatial, temporal and vertical distribution is presented. Aerosol transport from the northwestern arid regions into the Indo-Gangetic Plains and over the foothills of the Himalayas is found to be vertically extended to elevated altitudes (up to 5 km) as observed from the space-borne lidar measurements (CALIPSO). In relation with the enhanced pre-monsoon aerosol loading and the associated solar absorption effects on tropospheric temperature anomalies, this paper investigates the monsoon rainfall variability over India in recent past decades from an observational viewpoint. It is found that the early summer monsoon rainfall over India is on the rise since 1950s, as indicated by historical rainfall data, with over 20% increase for the period 1950-2004. This large sustained increase in the early summer rainfall is led by the observed strengthening of the pre-monsoon tropospheric land-sea thermal gradient over the Indian monsoon region as indicated by microwave satellite measurements (MSU) of tropospheric temperatures from 1979-2007. Combined analysis of changes in tropospheric temperatures and summer monsoon rainfall in the past three decades, suggest a future possibility of an emerging rainfall pattern of a wetter monsoon over South Asia in early summer followed by a drier period.

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Section: R Gautam Et Al: Aerosol and Rainfall Variability Over The mentioning

confidence: 99%

Section: Inter-annual Variabilitymentioning

confidence: 99%

Aerosol and rainfall variability over the Indian monsoon region: distributions, trends and coupling

et al. 2009

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“…In particular, anthropogenic pollution is concentrated in central/northeast India (for example, see Di Girolamo et al, 2004;Prasad et al, 2006), and these polluted air masses may (during active monsoon periods) or may not (during monsoon break periods) reach the TTL.…”

Section: Changes In Deep Convection Between Active and Break Monsoon mentioning

confidence: 99%

A climatological perspective of deep convection penetrating the TTL during the Indian summer monsoon from the AVHRR and MODIS instruments

Devasthale

Fueglistaler

2010

Atmos. Chem. Phys.

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Abstract. The impact of very deep convection on the water budget and thermal structure of the tropical tropopause layer is still not well quantified, not least because of limitations imposed by the available observation techniques. Here, we present detailed analysis of the climatology of the cloud top brightness temperatures as indicators of deep convection during the Indian summer monsoon, and the variations therein due to active and break periods. We make use of the recently newly processed data from the Advanced Very High

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“…In addition, aerosol properties have been studied over India using a variety of in situ and remote-sensing measurements (Sagar et al, 2004;Dey et al, 2005;Devara et al, 2005;Ganguly et al, 2006;Krishna Moorthy et al, 2007;Srivastava et al, 2008;Kuniyal et al, 2009;Kaskaoutis et al, 2009;Vinoj et al, 2009;Pathak et al, 2010;Niranjan et al, 2011;Kumar et al, 2012;Lodhi et al, 2013;Verma et al, 2014). The aerosol scenario over India, study of anthropogenic and natural aerosols (Verma et al, 2011;Ramachandran et al, 2012), identification of pollution hot-spots (Di Girolamo et al, 2004), and the evolution and increase and/or decrease of pollution levels (Krishna over different timescales have also been studied. Several studies have investigated the aerosol climatology and explained it on the basis of prevailing meteorological variables (for example, Ganguly et al (2006)).…”

Section: Introductionmentioning

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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Analysis of Multi‐angle Imaging SpectroRadiometer (MISR) aerosol optical depths over greater India during winter 2001–2004

Cited by 212 publications

References 18 publications

Aerosol and rainfall variability over the Indian monsoon region: distributions, trends and coupling

Aerosol and rainfall variability over the Indian monsoon region: distributions, trends and coupling

A climatological perspective of deep convection penetrating the TTL during the Indian summer monsoon from the AVHRR and MODIS instruments

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

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