Anirban Guha

Research Field

Lightning

10.1016/j.jastp.2020.105527

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Citations (11)

On Use of WWLLN Data as an Initial Guess in the Inverse ELF Problem for Global Lightning

AGUFM (2012)

V. C. Mushtak Elizabeth D. Williams Anirban Guha

Lightning

World wide

Source

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Citations (0)

ELF Radio Waves in the Service of Studying the Lithosphere-Atmosphere-Ionosphere System

Tamás Bozóki Gabriella Sátori Earle Williams Ernö Prácser Karolina Szabóné André

At the lowest end of the radio spectrum, in the extremely low frequency (ELF) band (3 Hz -3 kHz), lightning is by far the most dominant source of natural electromagnetic (EM) waves, the energy of which completely fills the cavity formed by the Earth's surface and the lowest part of the ionosphere.Due to the very weak attenuation they suffer during their propagation in the Earth-ionosphere waveguide (about 0.5 dB/Mm), these EM waves can travel around the Earth several times before their energy is dissipated.Constructive interference of EM waves propagating in opposite directions from the same source (direct and antipodal waves) leads to the formation of global EM resonances, known as Schumann resonances (SRs), with resonance frequencies around 8, 14, 20, etc. Hz.While the EM radiation of the most powerful lightning strokes ("mesoscale lightning") can excite SRs on an individual basis (so called Q-bursts or SR transients), most of the "common" lightning strokes produce a quasisteady "background" field in which the individual pulses cannot be distinguished.

10.46620/ursigass.2023.2949.vzit5035

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First results of fair-weather atmospheric electricity measurements in Northeast India

Journal of Earth System Science (2010)

Anirban Guha Bratati De S. Gurubaran S. S. De K. Jeeva

Atmospheric electricity

Potential gradient

Diurnal temperature variation

10.1007/s12040-010-0014-9

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Citations (15)

Elemental characterization and morphological analysis of atmospheric aerosols in a rural-continental environment of Northeast India

Arabian Journal of Geosciences (2022)

Parminder Kaur Mispaur Rahaman Anirban Guha

Mineral dust

Aethalometer

Particle (ecology)

10.1007/s12517-022-11013-5

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Citations (4)

Seasonal Characteristics of Aerosol Black Carbon in Relation to Long Range Transport over Tripura in Northeast India

Aerosol and Air Quality Research (2014)

Anirban Guha Barin Kumar De Pranab Kumar Dhar Trisanu Banik Monti Chakraborty

This study presents the characteristics of aerosol black carbon (BC) from a rural continental site, Agartala, located in the North-Eastern part of India using two year measurements from September 2010 to September 2012. Diurnal and seasonal variations are examined in relation to the unique geographical location, changeable meteorological conditions and distinct source characteristics. Winter season is characterized by extremely high BC concentration (17.8 ± 9.2 µg/m3) comparable to those seen in urban environments of India, dropping off to much lower values during the monsoon (2.8 ± 1.7 µg/m3). Even this lowest seasonal mean is rather high, given the rural nature of Tripura. Examination of the spectral dependence of aerosol absorption coefficients indicates that the main source of aerosol to total BC burden at Agartala is the fossil fuel combustions. Concentration weighted trajectory (CWT) analysis indicate that the characteristic high BC during winter is mostly associated with the advection from the Indo-Gangetic Plains (IGP), while the air mass pattern is constricted to the oceanic region during monsoon making BC aloft due to local pollution only.

Seasonality

Mass concentration (chemistry)

10.4209/aaqr.2014.02.0029

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Citations (69)

Temporal variability, meteorological influences, and long-range transport of atmospheric aerosols over two contrasting environments Agartala and Patiala in India

Environmental Science and Pollution Research (2023)

Parminder Kaur Pranab Kumar Dhar Onam Bansal Darshan Singh Anirban Guha

Diurnal temperature variation

Seasonality

Sea breeze

10.1007/s11356-023-29580-9