Results 31 to 40 of about 21,471 (126)

Two‐Day Wave Modulation of Gravity Wave Momentum Fluxes Observed Over South America

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 8, 28 April 2025.
Abstract Planetary wave (PW) modulation of gravity wave (GW) dissipation has long been proposed as a source of longitudinal variability in the mesosphere and lower thermosphere. However, direct measurements of GW drag are rare. We identify 2‐day wave variations in GW momentum fluxes measured by the Southern Argentina Agile Meteor Radar (SAAMER) in Rio ...
Ruth S. Lieberman, Gunter Stober, Erich Becker, Diego Janches, Jun Ma, Alan Liu   +5 more
wiley   +1 more source

Oceanographic Profiling and Spectroradiometer Observations from the MOCE-1 Cruise: 28 August to 8 October 1992 [PDF]

, 1994
This report contains the frrst observations made for the Modis Optical Characterization Experiment (MOCE). Data presented here were obtained on the R/V DeSteiguer between 28 August and 8 October along the central California coast and in Monterey Bay ...
Feinholz, Michael, E., Greene, Nancy, T., Yarbrough, Mark, A.   +2 more
core  

Gravity Wave Activity During the 2024 Sudden Stratospheric Warmings Observed by Atmospheric Waves Experiment (AWE)

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract The National Aeronautics and Space Administration (NASA) Atmospheric Waves Experiment (AWE) instrument, launched in November 2023, provides direct observation of small‐scale (30–300 km) gravity waves (GWs) in the mesosphere on a global scale.
Jiarong Zhang, Yucheng Zhao, Pierre‐Dominique Pautet, Ludger Scherliess, Michael J. Taylor, Hanli Liu   +5 more
wiley   +1 more source

Causes of the Abnormally Strong Easterly Phase of the Mesopause Semiannual Oscillation During the March Equinox of 2023 Revealed by a New Reanalysis Data Covering the Entire Middle Atmosphere

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract During the March equinox of 2023, a strong easterly wind of ∼80 m s−1 appeared at an altitude of ∼82 km in the equatorial upper mesosphere, which is regarded as an enhancement of the mesopause semi‐annual oscillation. In this study, a new reanalysis data available up to 110 km was used to investigate its momentum budget.
Kaoru Sato, Dai Koshin, Jose Suclupe, Jorge L. Chau, Lourivaldo M. Lima, Guozhu Li, S. Vijaya Bhaskara Rao, M. Venkat Ratnam, Rodolfo Rodriguez, Danny Scipion   +9 more
wiley   +1 more source

Design of a microwave radiometer for monitoring high voltage insulator contamination level [PDF]

, 2015
Microwave radiometry is a novel method for monitoring contamination levels on high voltage insulators. The microwave radiometer described measures energy emitted from the contamination layer and could provide a safe, reliable, contactless monitoring ...
Jiang, Yan, Judd, Martin D., McMeekin, Scott G., Nekahi, Azam, Reid, Alistair J., Wilson, Alan   +5 more
core   +1 more source

Unusual Variation in Nitric Oxide Radiative Flux and Neutral Density Over Hunga‐Tonga Region Caused by the Volcanic Eruption

Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract Large‐scale volcanic eruptions, such as the Hunga‐Tonga volcanic eruption that occurred in 2022, can impact the atmospheric structure and dynamics in a highly complex way. The response of Nitric oxide (NO) radiative emissions to the lower atmospheric forcing caused by the Hunga‐Tonga eruption has been examined in this study using Sounding of ...
Dayakrishna Nailwal, M. V. Sunil Krishna, Xian Lu, Haonan Wu, Akash Kumar, Alok Kumar Ranjan   +5 more
wiley   +1 more source

AI sea ice forecasts for Arctic conservation: A case study predicting the timing of caribou sea ice migrations

Ecological Solutions and Evidence, Volume 6, Issue 2, April/June 2025.
This case study explores how new AI‐driven sea ice forecasts can support Arctic wildlife conservation. Focusing on the waterways south of Victoria Island (Nunavut, Canada), we show that predicting freeze‐up dates could help anticipate Dolphin and Union caribou sea ice crossing times weeks in advance.
Ellen Bowler, James Byrne, Lisa‐Marie Leclerc, Amélie Roberto‐Charron, Martin S. J. Rogers, Rachel D. Cavanagh, Jason Harasimo, Melanie L. Lancaster, Ryan S. Y. Chan, Oliver Strickson, Jeremy Wilkinson, Rod Downie, J. Scott Hosking, Tom R. Andersson   +13 more
wiley   +1 more source

Landcover degradation analysis of Mediterranean forest by means of hyperplanes obtained from mixture linear algorithms (MLA) [PDF]

, 2009
The percentage alteration of the Mediterranean forest landscape is one of the primary indicators for its degradation. In this sense, the land cover abundances change analysis by using mixture linear algorithms (MLA), is presented like a good alternative ...
Arquero Hidalgo, Águeda, Martínez Izquierdo, María Estíbaliz, Vázquez Sierra, José Manuel   +2 more
core   +1 more source

Daily Sun‐induced chlorophyll fluorescence vs. irradiance curves reflect the photoadaptation of phytoplankton in surface waters

Limnology and Oceanography, Volume 70, Issue 4, Page 1001-1015, April 2025.
Abstract Phytoplankton chlorophyll Sun‐induced fluorescence is observable in the upwelling light field of the ocean. This allows its observation by radiometers in situ or on satellite sensors. Since it is influenced by both biomass and physiology it can potentially provide information about both.
Yannick Huot, David Antoine, Vincenzo Vellucci   +2 more
wiley   +1 more source

Thermal dosimetry for bladder hyperthermia treatment. An overview. [PDF]

, 2016
The urinary bladder is a fluid-filled organ. This makes, on the one hand, the internal surface of the bladder wall relatively easy to heat and ensures in most cases a relatively homogeneous temperature distribution; on the other hand the variable volume,
Bakker, Akke, Balidemaj, Edmond, Chopra, Rajiv, Crezee, Johannes, Geijsen, Elisabeth D., Hartmann, Josefin, Hulshof, Maarten C.C.M., Kok, H. Petra, Maccarini, Paolo F., Paulides, Margarethus M., Schooneveldt, Gerben, Sousa-Escandon, Alejandro, Stauffer, Paul R.   +12 more
core   +3 more sources