Blar i NTNU Open på forfatter "Orsolini, Yvan J."
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The 11 year solar cycle UV irradiance effect and its dependency on the Pacific Decadal Oscillation
Guttu, Sigmund; Orsolini, Yvan J.; Stordal, Frode; Otterå, Odd Helge; Omrani, Nour-Eddine (Peer reviewed; Journal article, 2021)The stratospheric, tropospheric and surface impacts from the 11 year ultraviolet solar spectral irradiance (SSI) variability have been extensively studied using climate models and observations. Here, we demonstrate using ... -
Abrupt Change in the Lower Thermospheric Mean Meridional Circulation During Sudden Stratospheric Warmings and Its Impact on Trace Species
Orsolini, Yvan J.; Zhang, Jiarong; Limpasuvan, Varavut (Peer reviewed; Journal article, 2022)Based on the hourly output from the 2000–2014 simulations of the National Center for Atmospheric Research's vertically extended version of the Whole Atmosphere Community Climate Model in specified dynamics configuration, ... -
Climatological Westward‐Propagating Semidiurnal Tides and Their Composite Response to Sudden Stratospheric Warmings in SuperDARN and SD‐WACCM‐X
Zhang, Z.; Limpasuvan, Varavut; Orsolini, Yvan J.; Espy, Patrick Joseph; Hibbins, Robert (Peer reviewed; Journal article, 2021)Using the Super Dual Auroral Radar Network observations (clustered around 60°N) and NCAR CESM2.0 extended Whole Atmosphere Community Climate Model nudged with reanalyzes, we examine the climatology of semidiurnal tides in ... -
Eastward-Propagating Planetary Waves Prior to the January 2009 Sudden Stratospheric Warming
Rhodes, Christian Todd; Limpasuvan, Varavut; Orsolini, Yvan J. (Peer reviewed; Journal article, 2021)Eastward-propagating planetary waves (EPWs) were investigated prior to the boreal January 2009 major sudden stratospheric warming (SSW) event simulated by the National Center for Atmospheric Research's Whole Atmosphere ... -
Impact of the major SSWs of February 2018 and January 2019 on the middle atmospheric nitric oxide abundance
Pérot, Kristell; Orsolini, Yvan J. (Peer reviewed; Journal article, 2021)The Arctic middle atmosphere was affected by major sudden stratospheric warmings (SSW) in February 2018 and January 2019, respectively. In this article, we report for the first time the impact of these two events on the ... -
Impact of the Pacific sector sea ice loss on the sudden stratospheric warming characteristics
Zhang, Jiarong; Orsolini, Yvan J.; Limpasuvan, Varavut; Ukita, Jinro (Peer reviewed; Journal article, 2022)The atmospheric response to Arctic sea ice loss remains a subject of much debate. Most studies have focused on the sea ice retreat in the Barents-Kara Seas and its troposphere-stratosphere influence. Here, we investigate ... -
Resolved gravity waves in a high-resolution model
Alexandersen, Håvar (Master thesis, 2022)Denne avhandlingen undersøker interaksjonen mellom planetære bølger og gravitasjonsbølger i en høyoppløst atmosfære modell. Luftstrømning over fjellterreng på jordens overflate kan skape gravitasjonsbølger. Amplituden ... -
The Role of Planetary Waves in Gravity Wave Activity in the Middle Atmosphere During Northern Hemisphere Winter - A High-Resolution General Circulation Model Approach
Moen, Kristoffer Sosulski (Master thesis, 2023)Interaksjonen mellom storskala planetære bølger (PWs) og de langt mindre atmosfæriske tyngebølgene (GWs) i stratosfæren og mesosfæren i nordlige breddegrader, analyseres ved bruk av den høyoppløselige WACCM-X-modellen. ...