Upper_Atmosphere: Recent submissions

Now showing items 61-80 of 941

A opto mechanical design for Fabry-Perot Interferometer

Mahavarkar, Prasanna (2023)

Fabry-Perot Interferometer are particularly useful for high-resolution spectroscopy and other applications including astronomy and intra-cavity laser-line narrowing. Fabry-Perot etalon with diameters 1 mm square to 100 mm ...
Monitoring cloud parameters using a ground- based airglow imager

Ghodpage, R. N.; Taori, A.; Patil, R. P.; Patil, M. K.; Gurav, O. B.; Sripathi, S.; Dimri, A. P. (2023)

The current study investigates the application of the photogrammetric technique, commonly used for satellite measurements, on the All Sky Imager (ASI), which is used for night airglow observations from Kolhapur (16.8° N, ...
Climate change over Indonesia and its impact on nutmegproduction: an analysis under high-resolution CORDEX-CORE regional simulation framework

Anripa, Nuralfin; Kumar, A.; Maharana, Pyarimohan; Dimri, A. P. (2023)

Nutmeg is an important spice and contributes significantly to the gross domesticproduct of Indonesia. The study examines the impact of climate change on Indonesia and the production of nutmeg over Banda Neira Island.Forthis,the ...
Impact of monsoon season rainfall spells on the ecosystem carbon exchanges of Himalayan Chir‑Pine and Banj‑Oak‑dominated forests: a comparative assessment

Lohani, Priyanka; Mukherjee, Sandipan; Sekar, K. Chandra; Mehta, Pooja; Kumar, Kireet; Dimri, A. P. (2023)

The Chir-Pine (Pinus roxburghii) and Banj-Oak (Quercus leucotrichophora)-dominated ecosystems of central Himalaya provide signifcant green services. However, responses of these ecosystems, with respect to ecosystem ...
Low latitude ionospheric TEC response to the solar flares during the peak of solar cycle 24

Saharan, Suniti; Maurya, Ajeet K.; Dube, A.; Patil, Omkar M.; Singh, Rajesh; Sharma, Himani (2023)

We describe the newly discovered response of differential vertical total electron content (DVTEC) in the low-equatorial latitude ionosphere to the solar flares during the peak of solar cycle 24 i.e., the year 2014. GPS ...
Kinetic study of ion acoustic waves in Venusian ionosphere

Kamalam, T.; Singh, S. V.; Sreeraj, T.; Lakhina, G. S. (2023)

Kinetic dispersion of the ion acoustic waves has been explored for an unmagnetized five component plasma system comprising of Venusian protons, Venusian oxygen ions, Venusian electrons, solar wind protons, and kappa ...
Quasi-two-day wave amplification through interhemispheric coupling during the 2010 austral summer

Singh, D.; Mitra, G.; Guharay, A.; Pallamraju, D.; Gurubaran, S. (2023)

A quasi-two-day wave (QTDW) event during January-February 2010 is investigated using the MERRA-2 reanalysis dataset. MERRA-2 data reveals the growth of the QTDW westward propagating wavenumber 3 preceded by a weak westward ...
Intense (SYM - H 6<-100 nT ) geomagnetic storms induced by planar magnetic structures in co-rotating interaction regions

Choraghe, Komal; Shaikh, Zubair; Raghav, Anil; Ghag, Kalpesh; Dhamane, Omkar (2023)

Generally, Co-rotating Interaction Region (CIR) induced geomagnetic storms are weak to moderate in magnitude. Moreover, CIRs can also drive intense storms when they are coupled with an ICME or other interplanetary structures. ...
Understanding Quiet and Storm Time EMIC Waves - 2 Van Allen Probes Results

Remya, B.; Halford, A. J.; Sibeck, D. G.; Murphy, K. R.; Fok, M. -C. (2023)

Geomagnetic indices have been used as a proxy for studying electromagnetic ion cyclotron (EMIC) wave occurrences under di erent geomagnetic conditions. However, the drivers of EMIC waves are di erent during non-storm, storm ...
Anisotropy of the near-field coseismic ionospheric perturbation amplitudes reflecting the source process: the 2023 February Turkey earthquakes

Bagiya, Mala S.; Heki, K.; Gahalaut, Vineet K. (2023)

The East Anatolian Fault in southern Turkey ruptured on 6 February 2023, causing a Mw 7.8 earthquake (EQ1), one of the largest strike-slip events recorded on land. ∼9 hr later, earthquake of Mw 7.7 (EQ2) occurred to the ...
Interplanetary shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations

Hajra, Rajkumar; Tsurutani, Bruce T.; Lakhina, G. S.; Lu, Quanming; Du, Aimin; Shan, Lican (2023)

The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ∼0.3 and 1.0 au from the Sun. With increasing heliocentric distance (rh), the plasma speed is found to increase at ∼34–40 km ...
Kinetic Alfvén waves excited by multiple free energy sources in the magnetotail

Barik, K. C.; Singh, S. V.; Lakhina, G. S. (2023)

The generation of kinetic Alfvén waves (KAWs) is investigated through a three-component theoretical model incorporating ion beam and velocity shear as the sources of free energy in a non-Maxwellian κ-distributed plasmas. The ...
Electrostatic solitary waves in the Venusian ionosphere pervaded by the solar wind: a theoretical perspective

Rubia, R.; Singh, S. V.; Lakhina, G. S.; Devanandhan, S.; Dhanya, M. B.; Kamalam, T. (2023)

Electrostatic solitary waves (ESWs) in the Venusian ionosphere that are impinged by the solar wind are investigated using a homogeneous, collisionless, and magnetized multicomponent plasma consisting of Venusian H+ and ...
Equatorial plasma bubble association with lower atmospheric gravity waves – Further evidences

Ghodpage, R.N.; Taori, A.; Patil, M.K.; Gurav, O.B.; Patil, R.P.; Sripathi, S. (2023)

Space based radio wave communication and navigation has become need of the society. Atmospheric (thermospheric-ionospheric) processes, such as Equatorial Plasma Bubbles (EPBs), affect the radio waves propagating through ...
A mechanism for large-amplitude parallel electrostatic waves observed at the Magnetopause

Lakhina, G. S.; Singh, Satyavir; Sreeraj, Thekkeyil; Devanandhan, Selvaraj; Rubia, Rajith (2023)

Large-amplitude electrostatic waves propagating parallel to the background magnetic field have been observed at the Earth’s magnetopause by the Magnetospheric Multiscale (MMS) spacecraft. These waves are observed in the ...
Day-to-day quantification of changes in global lightning activity based on Schumann resonances

Bozóki, T.; Sátori, G.; Williams, E.; Guha, A.; Liu, Y.; Steinbach, P.; Leal, A.; Herein, M.; Atkinson, M.; Beggan, C. D.; DiGangi, E.; Koloskov, A.; Kulak, A.; LaPierre, J.; Milling, D. K.; Mlynarczyk, J.; Neska, A.; Potapov, A.; Raita, T.; Rawat, R.; Said, R.; Sinha, A. K.; Yampolski, Y. (2023)

The importance of lightning has long been recognized from the point of view of climate-related phenomena. However, the detailed investigation of lightning on global scales is currently hindered by the incomplete and ...
The possible cause of most intense geomagnetic superstorm of the 21st century on 20 November 2003

Raghav, Anil; Shaikh, Zubair; Vemareddy, P.; Bhaskar, Ankush; Dhamane, Omkar; Ghag, Kalpesh; Tari, Prathmesh; Dayanandan, Baiju; Suti, Badar Mohammed Al (2023)

An extreme geomagnetic storm has the potential to affect various technologies and activities in space and on the ground, e.g., power grids, oil and gas industries, communications, ground transportation, satellite ...
Enhanced gravity wave activity in the mesosphere lower thermosphere region over Tirunelveli as a response to tropospheric convective event

Krishnapriya, K.; Sathishkumar, S.; Sridharan, S. (2023)

The recent upgrade of Medium-Frequency (MF) wind radar at Tirunelveli (8.7⁰N, 77.8⁰E) has improved the height and time resolution of the wind measurements, which are utilized in the present study to examine high frequency ...
Machine learning approach for detection of plasma depletions from TEC

Kapil, Chandan; Seemala, Gopi K. (2023)

Ionospheric delay is of concern for trans-ionospheric radio communication, especially for the navigation systems relying on these satellite signals. Most of the ionospheric delays are estimated to a degree of first-order ...
Performance of the CORDEX-SA regional climate models in simulating summer monsoon rainfall and future projections over East India

Barde, Vasundhara; Nageswararao, M. M.; Mohanty, U. C.; Panda, R. K. (2023)

—The Indian summer monsoon rainfall (ISMR, June– September) is an important factor in agricultural planning and the Indian economy. The ISMR over East India (EI: ChhattisgarhBihar-Jharkhand-Odisha) is particularly ...

Now showing items 61-80 of 941

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