Search Results - "YIZENGAW, E"

Interplanetary shocks and the resulting geomagnetically induced currents at the equator by Carter, B. A., Yizengaw, E., Pradipta, R., Halford, A. J., Norman, R., Zhang, K.

“…Geomagnetically induced currents (GICs) caused by interplanetary shocks represent a serious space weather threat to modern technological infrastructure. The…”
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Global equatorial plasma bubble occurrence during the 2015 St. Patrick's Day storm by Carter, B. A., Yizengaw, E., Pradipta, R., Retterer, J. M., Groves, K., Valladares, C., Caton, R., Bridgwood, C., Norman, R., Zhang, K.

“…An analysis of the occurrence of equatorial plasma bubbles (EPBs) around the world during the 2015 St. Patrick's Day geomagnetic storm is presented. A network…”
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Postmidnight bubbles and scintillations in the quiet-time June solstice by Yizengaw, E., Retterer, J., Pacheco, E. E., Roddy, P., Groves, K., Caton, R., Baki, P.

“…While the mechanism for producing plasma irregularities in the dusk sector is believed to be fairly well understood, the cause of the formation of…”
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An analysis of the quiet time day-to-day variability in the formation of postsunset equatorial plasma bubbles in the Southeast Asian region by Carter, B. A., Yizengaw, E., Retterer, J. M., Francis, M., Terkildsen, M., Marshall, R., Norman, R., Zhang, K.

“…Presented is an analysis of the occurrence of postsunset Equatorial Plasma Bubbles (EPBs) detected using a Global Positioning System (GPS) receiver at Vanimo…”
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Distinct neutrophil effector functions in response to different isolates of Leishmania aethiopica by Adem, E, Cruz Cervera, E, Yizengaw, E, Takele, Y, Shorter, S, Cotton, J. A, Getti, G, Kropf, P

“…In Ethiopia, cutaneous leishmaniasis is mainly caused by Leishmania (L.) aethiopica parasites and presents in three main clinical forms. It is still not clear…”
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The longitudinal variability of equatorial electrojet and vertical drift velocity in the African and American sectors by Yizengaw, E, Moldwin, M B, Zesta, E, Biouele, C M, Damtie, B, Mebrahtu, A, Rabiu, B, Valladares, C F, Stoneback, R

“…While the formation of equatorial electrojet (EEJ) and its temporal variation is believed to be fairly well understood, the longitudinal variability at all…”
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Geomagnetically Induced Currents Around the World During the 17 March 2015 Storm by Carter, B. A., Yizengaw, E., Pradipta, R., Weygand, J. M., Piersanti, M., Pulkkinen, Antti Aleksi, Moldwin, M. B., Norman, R., Zhang, K.

“…Geomagnetically induced currents (GICs) represent a significant space weather issue for power grid and pipeline infrastructure, particularly during severe…”
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Causes of the longitudinal differences in the equatorial vertical E × B drift during the 2013 SSW period as simulated by the TIME-GCM by Maute, A., Hagan, M. E., Yudin, V., Liu, H.-L., Yizengaw, E.

“…During stratospheric sudden warming (SSW) periods large changes in the low‐latitude vertical drift have been observed at Jicamarca as well as in other…”
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Geomagnetic control of equatorial plasma bubble activity modeled by the TIEGCM with Kp by Carter, B. A., Retterer, J. M., Yizengaw, E., Groves, K., Caton, R., McNamara, L., Bridgwood, C., Francis, M., Terkildsen, M., Norman, R., Zhang, K.

“…Describing the day‐to‐day variability of Equatorial Plasma Bubble (EPB) occurrence remains a significant challenge. In this study we use the…”
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Temporal Variations in Solar Irradiance Since 1947 by Tebabal, A., Damtie, B., Nigussie, M., Yizengaw, E.

“…The study of variations in total solar irradiance (TSI) and spectral irradiance is important for understanding how the Sun affects the Earth’s climate. A…”
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Longitudinal differences of ionospheric vertical density distribution and equatorial electrodynamics by Yizengaw, E., Zesta, E., Moldwin, M. B., Damtie, B., Mebrahtu, A., Valladares, C. E., Pfaff, R. F.

“…Accurate estimation of global vertical distribution of ionospheric and plasmaspheric density as a function of local time, season, and magnetic activity is…”
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Using solar wind data to predict daily GPS scintillation occurrence in the African and Asian low-latitude regions by Carter, B. A., Retterer, J. M., Yizengaw, E., Wiens, K., Wing, S., Groves, K., Caton, R., Bridgwood, C., Francis, M., Terkildsen, M., Norman, R., Zhang, K.

“…The feasibility of predicting the daily occurrence of Global Positioning System scintillation events using forecasts of common geophysical indices to drive a…”
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Global plasmaspheric TEC and its relative contribution to GPS TEC by Yizengaw, E., Moldwin, M.B., Galvan, D., Iijima, B.A., Komjathy, A., Mannucci, A.J.

“…The plasmaspheric electron content is directly estimated from the global positioning system (GPS) data onboard JASON-1 Satellite for the first time. Similarly,…”
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Response of the Equatorial Ionosphere to the Geomagnetic DP 2 Current System by Yizengaw, E., Moldwin, M. B., Zesta, E., Magoun, M., Pradipta, R., Biouele, C. M., Rabiu, A. B., Obrou, O. K., Bamba, Z., Paula, E. R. De

“…The response of equatorial ionosphere to the magnetospheric origin DP 2 current system fluctuations is examined using ground-based multiinstrument…”
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ULF Wave-Associated Density Irregularities and Scintillation at the Equator by Yizengaw, E., Zesta, E., Moldwin, M. B., Magoun, M., Tripathi, N. K., Surussavadee, C., Bamba, Z.

“…This paper presents independent multi-instrument observations that address the physical mechanisms of how ultralow-frequency (ULF) wave-associated electric…”
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Modeling total solar irradiance from PMOD composite using feed-forward neural networks by Tebabal, A., Damtie, B., Nigussie, M., Bires, A., Yizengaw, E.

“…The variability of the solar activity dominates the variability of the earth's atmosphere, which affects human life and technology on earth. To understand the…”
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Storm-time characteristics of the equatorial ionization anomaly in the East African sector by Kassa, T., Damtie, B., Bires, A., Yizengaw, E., Cilliers, P.

“…•Storm-time E, neutral wind and composition can affect the EIA’s pattern.•Geomagnetic storms can intensify or suppress the EIA’s development.•The storm effect…”
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Validation of NeQuick TEC data ingestion technique against C/NOFS and EISCAT electron density measurements by Nigussie, M., Radicella, S. M., Damtie, B., Yizengaw, E., Nava, B., Roininen, L.

“…This paper investigates a technique to estimate near‐real‐time electron density structure of the ionosphere. Ground‐based GPS receiver total electron content…”
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The day-to-day longitudinal variability of the global ionospheric density distribution at low latitudes during low solar activity by Pacheco, E. E., Yizengaw, E.

“…One important characteristic of longitudinal variability of the ionosphere is the global wavenumber‐4 signature. Recent investigations have focused mainly on…”
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Low-Latitude Pi2 Waves according to Observations on SWARM Satellites and Ground Stations by Martines-Bedenko, V. A., Pilipenko, V. A., Fedorov, E. N., Nahayo, E., Yizengaw, E.

“…We considered wave disturbances of the Pi2 type geomagnetic field (periods of 1–2 min) recorded simultaneously by magnetometers at low-latitude stations in…”
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