Unusual behavior of quiet-time zonal and vertical plasma drift velocities over Jicamarca during the recent extended solar minimum of 2008

Santos, Ângela M.; Abdu, Mangalathayi A.; Souza, Jonas R.; Batista, Inez S.; Sobra, José H. A.
June 2017
Annales Geophysicae (09927689);2017, Vol. 35 Issue 6, p1219
Academic Journal
The influence of the recent deep and prolonged solar minimum on the daytime zonal and vertical plasma drift velocities during quiet time is investigated in this work. Analyzing the data obtained from incoherent scatter radar from Jicamarca (11.95° S, 76.87° W) we observe an anomalous behavior of the zonal plasma drift during June 2008 characterized by lower than usual daytime westward drift and its early afternoon reversal to eastward. As a case study the zonal drift observed on 24 June 2008 is modeled using a realistic low-latitude ionosphere simulated by the Sheffield University Plasmasphere-Ionosphere Model-INPE (SUPIM-INPE). The results show that an anomalously low zonal wind was mainly responsible for the observed anomalous behavior in the zonal drift. A comparative study of the vertical plasma drifts obtained from magnetometer data for some periods of maximum (2000-2002) and minimum solar activity (1998, 2008, 2010) phases reveal a considerable decrease on the E-region conductivity and the dynamo electric field during 2008. However, we believe that the contribution of these characteristics to the unusual behavior of the zonal plasma drift is significantly smaller than that arising from the anomalously low zonal wind. The SUPIM-INPE result of the critical frequency of the F layer (foF2) over Jicamarca suggested a lower radiation flux than that predicted by solar irradiance model (SOLAR2000) for June 2008.


Related Articles

  • Accuracy assessment of the GPS-TEC calibration constants by means of a simulation technique. Conte, Juan; Azpilicueta, Francisco; Brunini, Claudio // Journal of Geodesy;Oct2011, Vol. 85 Issue 10, p707 

    During the last 2 decades, Global Positioning System (GPS) measurements have become a very important data-source for ionospheric studies. However, it is not a direct and easy task to obtain accurate ionospheric information from these measurements because it is necessary to perform a careful...

  • The Influence of Atmospheric Cloud Radiative Effects on the Large-Scale Atmospheric Circulation. Li, Ying; Thompson, David W. J.; Bony, Sandrine // Journal of Climate;Sep2015, Vol. 28 Issue 18, p7263 

    The influence of clouds on the large-scale atmospheric circulation is examined in numerical simulations from an atmospheric general circulation model run with and without atmospheric cloud radiative effects (ACRE). In the extratropics of both hemispheres, the primary impacts of ACRE on the...

  • Substorm-related thermospheric density and wind disturbances derived from CHAMP observations. Ritter, P.; Lühr, H.; Doornbos, E. // Annales Geophysicae (09927689);Jun2010, Vol. 28 Issue 6, p1207 

    The input of energy and momentum from the magnetosphere is most efficiently coupled into the high latitude ionosphere-thermosphere. The phenomenon we are focusing on here is the magnetospheric substorm. This paper presents substorm related observations of the thermosphere derived from the CHAMP...

  • The Influence of Sea Surface Temperatures on the Northern Winter Stratosphere: Ensemble Simulations with the MAECHAM5 Model. Manzini, E.; Giorgetta, M. A.; Esch, M.; Kornblueh, L.; Roeckner, E. // Journal of Climate;Aug2006, Vol. 19 Issue 16, p3863 

    The role of interannual variations in sea surface temperatures (SSTs) on the Northern Hemisphere winter polar stratospheric circulation is addressed by means of an ensemble of nine simulations performed with the middle atmosphere configuration of the ECHAM5 model forced with observed SSTs during...

  • Termination of Indian Ocean Dipole Events in a Coupled General Circulation Model. Rao, Suryachandra A.; Masson, Sebastien; Jing-Jia Luo; Behera, Swadhin K.; Yamagata, Toshio // Journal of Climate;Jul2007, Vol. 20 Issue 13, p3018 

    Using 200 yr of coupled general circulation model (CGCM) results, causes for the termination of Indian Ocean dipole (IOD) events are investigated. The CGCM used here is the Scale Interaction Experiment-Frontier Research Center for Global Change (SINTEX-F1) model, which consists of a version of...

  • How can we understand the global distribution of the solar cycle signal on the Earth's surface? Kunihiko Kodera; Thiéblemont, Rémi; Seiji Yukimoto; Matthes, Katja // Atmospheric Chemistry & Physics;2016, Vol. 16 Issue 20, p12925 

    To understand solar cycle signals on the Earth's surface and identify the physical mechanisms responsible, surface temperature variations from observations as well as climate model data are analysed to characterize their spatial structure. The solar signal in the annual mean surface temperature...

  • The effects of atmospheric waves on the amounts of polar stratospheric clouds. Kohma, M.; Sato, K. // Atmospheric Chemistry & Physics Discussions;2011, Vol. 11 Issue 6, p16967 

    A quantitative analysis on the relationship between atmospheric waves and polar stratospheric clouds (PSCs) in the 2008 austral winter and the 2007/2008 boreal winter is made using CALIPSO, COSMIC and Aura MLS observation data and reanalysis data. A longitude-time section of the frequency of PSC...

  • The Role of Stochastic Forcing in Modulating ENSO Predictability. Flügel, Moritz; Hang, Ping C.; Penland, Cecile // Journal of Climate;Aug2004, Vol. 17 Issue 16, p3125 

    Predictability analysis of a 1000-yr simulated zonal wind stress anomaly in an intermediate coupled model reveals that low-frequency variations in ENSO prediction are closely linked to changes in spatial structures of the uncoupled atmospheric noise. Enhanced predictability well beyond 1 yr is...

  • The Tropospheric Response to Tropical and Subtropical Zonally Asymmetric Torques: Analytical and Idealized Numerical Model Results. Shaw, Tiffany A.; Boos, William R. // Journal of the Atmospheric Sciences;Jan2012, Vol. 69 Issue 1, p214 

    The tropospheric response to prescribed tropical and subtropical zonally asymmetric torques, which can be considered as idealizations of vertical momentum transfers by orographic gravity waves or convection, is investigated. The linear analytical Gill model response to westward...

  • Self-organization of large-scale ULF electromagnetic wave structures in their interaction with nonuniform zonal winds in the ionospheric E region. Aburjania, G.; Chargazia, Kh. // Plasma Physics Reports;Feb2011, Vol. 37 Issue 2, p177 

    study is made of the generation and subsequent linear and nonlinear evolution of ultralow-frequency planetary electromagnetic waves in the E region of a dissipative ionosphere in the presence of a nonuniform zonal wind (a sheared flow). Hall currents flowing in the E region and such permanent...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics