Aircraft observations of elevated pollution layers near the foothills of the Himalayas during CAIPEEX‐2009

Padmakumari, B.; Maheskumar, R. S.; Morwal, Savita B.; Harikishan, G.; Konwar, Mahen; Kulkarni, J. R.; Goswami, Bedartha

doi:10.1002/qj.1989

Cited by 45 publications

(32 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They attributed it to dust transport and wet removal due to monsoon rainfall (both has high inter-annual variability). The aircraft observations from Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) investigated that, there exist a thick layer of haze and elevated aerosol layers up to 4 km over North India and foothills of Himalayas during pre-monsoon (May in the present study) period (Padmakumari et al, 2012). They further examined that the sources of these elevated layers are mainly dominated by local anthropogenic activities (e.g., biomass burning) and transported dust due to long range transport.…”

Section: Observational Approachmentioning

confidence: 96%

The effect of absorbing aerosols on Indian monsoon circulation and rainfall: A review

Sanap

Pandithurai

2015

Atmospheric Research

View full text Add to dashboard Cite

Section: Observational Approachmentioning

confidence: 96%

The effect of absorbing aerosols on Indian monsoon circulation and rainfall: A review

Sanap

Pandithurai

2015

Atmospheric Research

View full text Add to dashboard Cite

“…The Indian subcontinent has elevated aerosol concentrations (e.g., PM 10 concentrations of >250 μg/m 3 in the Indo‐Gangetic Basin) relative to typical continental conditions due to anthropogenic emissions (Pande et al, ). Padmakumari et al () observed high aerosol loading (above 5,000 particles cm −3 ) with hazy conditions and cloud ice above 6 km with temperatures below −14 °C. For the referenced case study the high aerosol loading was due to local emissions and dust from long‐range transport.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Ice‐Nucleating Particles Over Northern India

et al. 2019

View full text Add to dashboard Cite

The sources and concentrations of ice‐nucleating particles (INPs) over India are not well known. Here, INP concentrations in rainwater from Northern India and a dust sample from the Thar Desert are characterized. Rainwater INP concentrations ranged between 104 and 3 × 107 L−1 water, spanning temperatures between −4 and −28 °C. During the monsoon season, INP concentrations were low and approached those in remote marine air mass. During the winter season, INPs active between −4 to −10 °C were occasionally observed. An increase in INP activity sometimes occurred after the initial onset of rain. The onset freezing temperature of samples active at warmer temperatures was shifted to colder temperature after heat treatment, suggesting that the INP activity stemmed from biological influence. Plating was used to isolate and sequence INP active bacterial strains from some of the rainwater samples, specifically strains of close taxonomic affiliation with the ice nucleating genera Pantoea. The size‐resolved ice nucleation active site density for 200–600‐nm particles of Thar Desert Dust ranged between 107 and 109 m−2 at −20 °C, values similar to dusts from other regions of the world. The data reported herein may help constrain models that seek to predict the impact of INP on the properties of mixed‐phased clouds over the Indian subcontinent.

show abstract

“…Using the balloon-borne observations over Hyderabad located in central India, Babu et al (2011) reported BC concentrations as high as 12 mg m À3 at about 4.5 km and~5 mg m À3 at about 8.5 km altitude. Recent study by Padmakumari et al (2013) has reported elevated aerosol pollution layers up to altitudes of 4 km in the foot hills of Himalaya during CAIPEEX 2009. The reason for the existence of these elevated BC layers may either be associated with the long range transport of BC mass in higher altitudes or it may be of local origin at the surface, lifted up by vertical winds.…”

Section: Elevated Bc Layers In Cloud Regimes Over Guwahatimentioning

confidence: 98%

“…These measurements were made at an interval of 1 s and the aircraft flew at an average speed of 100 m s À1 . Detailed descriptions of instrumentation used in the air craft for cloud/meteorological observations and its calibration details during CAIPEEX phaseeI Campaign are available elsewhere Padmakumari et al, 2013;Pandithurai et al, 2012;Prabha et al, 2012).…”

Section: Datamentioning

confidence: 99%