Ionospheric structure usually changes dramatically during a strong geomagnetic storm period, which will significantly affect the short-wave communication and satellite navigation systems. It is critically important to make accurate ionospheric predictions under extreme space weather conditions. However, prediction always challenge, pure physical methods often fail get satisfactory result since behavior varies greatly with different storms. In this paper, in order find an effective method,...

Abstract Observations with a global coverage are very important for space physics research and weather monitoring. However, due to the technical limitations, it would be expensive or even impossible achieve seamless advanced observational devices. It useful fill missing data gaps create map from available data, but up until now this has been challenging. Fortunately, deep learning method, recent breakthrough in artificial intelligence, may provide an effective way solve problem by making...

Abstract We present a study of the quasi 10‐day waves (Q10DWs) in mesosphere and lower thermosphere (MLT) during sudden stratospheric warming (SSW) event February 2018 based on three meteor radars located at Mohe (MH, 53.5°N, 122.3°E), Beijing (BJ, 40.3°N, 116.2°E), Wuhan (WH, 30.5°N, 116.6°E). The enhanced Q10DWs are observed meridional component MH zonal BJ WH. In component, monthly mean Q10DW amplitudes greater than 10 m/s but weaker ∼7 ∼15 WH only 9 MH. These latitudinal differences MLT...

Abstract Responses of quasi‐6‐day waves (Q6DWs) to the extreme 2019 Antarctic stratospheric sudden warming (SSW) have been widely reported in ionosphere, while excitation mechanism global Q6DWs is still unclear mesosphere and lower thermosphere (MLT) region. According Aura satellite measurements, amplitudes upper MLT region are found be higher than their climatological activities from 2005 2020 at mid‐latitudes both Northern Southern Hemispheres. Combined with Modern‐Era Retrospective...

Abstract. This paper presents characteristics of quasi-two-day waves (QTDWs) in the mesosphere and lower thermosphere (MLT) between 52° S N from 2002 to 2011 using TIMED/SABER temperature data. Spectral analysis suggests that dominant QTDW components at mid-high latitudes Southern Hemisphere (SH) Northern (NH) are (2.13, W3) (2.04, W4), respectively. The most remarkable is W3), which happened southern summer 2002–2003 32° 60 90 km altitude. Its downward phase propagation indicates upward...

Abstract An extensive analysis of quasi 5‐day waves (5DWs) in the mesosphere and lower thermosphere their responses to a major sudden stratospheric warming (SSW) event (January 2013) are presented. The is based on data conducted from meteor radar chain period December 2008 November 2017 Aura Microwave Limb Sounder satellite. includes three stations located at Mohe (MH, 53.5°N, 122.3°E), Beijing (BJ, 40.3°N, 116.2°E), Wuhan (WH, 30.5°N, 114.6°E). 5DWs present clear interannual seasonal...

Abstract Using radiosonde and ERA5 reanalysis data, we investigated the spatial temporal variations in tropopause inversion layer (TIL) Antarctic region during 2002 2019 southern sudden stratospheric warming (SSW) events mechanism involved. Following these SSW there was a sharper TIL warmer lower tropopause. After onset of rapid major event minor 2019, magnitudes anomalies increased reached their respective first peaks. The peaked again following early final breakdown polar vortex (i.e.,...

The semiconductor-metal transition of vanadium dioxide (VO2) thin films epitaxially grown on C-plane sapphire is studied by depositing Au nanoparticles onto the thermochromic forming a metal-semiconductor contact, namely, nano-Au-VO2 junction. It reveals that have marked effect reduction in phase temperature VO2. A process electron injection which electrons flow from to VO2 due lower work function metal believed be mechanism. result may support Mott–Hubbard model for

Thermal tuning of the localized surface plasmon resonance (LSPR) Ag nanoparticles on a thermochromic thin film VO2 was studied experimentally. The is strongly temperature dependent and thermally reversible. LSPR wavelength λSPR shifts to blue with increasing from 30 80 °C, back red as decreases. A smart achievable condition that controlled in stepwise manner. tunable range depends particle size or mass thickness metal nanoparticle film. Further, tunability found be enhanced significantly...

Abstract We present an analysis of the responses quasi 2 day waves (QTDWs) to 2013 sudden stratosphere warming (SSW) in mesosphere and lower thermosphere (MLT) region. The study is based on data collected by a meteor radar chain along 120°E meridian Northern Hemisphere which consists four stations at Mohe (52.5°N, 122.3°E), Beijing (40.3°N, 116.2°E), Wuhan (30.5°N, 114.6°E), Sanya (18.3°N, 109.6°E). It first time that enhancement QTDW neutral wind during SSW observed midlatitudes Hemisphere....

Abstract This study presents an analysis of the long‐term variations four propagating quasi 16‐day waves with Wavenumbers 1 and 2 investigates their association sudden stratospheric warming (SSW) events. The is based on data obtained from Aura Microwave Limb Sounder satellite Modern‐Era Retrospective Analysis for Research Applications‐2 reanalysis in period 2004 to 2018. Strong are found winter hemisphere. Wavenumber prominent Northern Hemisphere eastward‐propagating dominant Southern...

Abstract Based on the temperature and dust opacity data from Mars Reconnaissance Orbiter/Mars Climate Sounder OpenMars reanalysis, we report an extremely strong quasi‐20‐sol wave (Q20SW) during global storm (GDS) in Year (MY) 34. After onset of GDS MY34, amplitude Q20SW reaches approximately 12 K temperature, which is strongest MY29 to MY35. By analyzing Eliassen‐Palm fluxes their divergences, conclude that enhanced due unseasonal increase caused by GDS. Moreover, find a eastward propagating...

This study analyzed trends in the incidence and mortality of laryngeal cancer (LC) China from 2004 to 2018, provided projections up 2033, identified contributing factors influencing these trends. LC data were obtained Chinese Cancer Registry Annual Reports for 2018. Estimated Percent Change (EAPC) 95% confidence intervals (CI) calculated using Joinpoint Regression Software evaluate rates registry areas, combined with national population data, used estimate new cases deaths. Projections made...

Honeywell's new packaging technique uses silicon as a multichip substrate. Multiple integrated circuit (IC) chips are flip bonded by controlled collapse joining to The substratc provides the interconnections between and next level of interface. substrate is subseqently epoxy ceramic substrate, package then completed wire bonding hermetic sealing. Silicon-on-silicon offers six advantages: 1) excellent thermal matching, 2) high density, 3) commonality fabrication using conventional IC...

Abstract. Relative to extensive studies of interactions between the quasi 2-day wave and tides, nonlinear interaction 16-day with tides was reported less, in particular diurnal tide. We present an observational study a possible event tide based on meteor radar measurement at Maui. An obvious can be observed from raw wind data. Its maximum meridional amplitude attain 18.0 m s−1 height 92 km during time our attention, which is larger than that previous reports. Sum difference are have rather...

Abstract The Sounding of the Atmosphere using Broadband Emission Radiometry satellite instrument has been measuring mesospheric global temperature since February 2002, providing longest continuous data set to statistically study climatology and anomaly quasi‐two‐day waves (QTDWs), including westward zonal wave number 2 (W2), 3 (W3), 4 (W4) modes. It is found that W2 QTDW generally peaks earliest, followed by W3 mode with W4 being amplified lastly. This temporal pattern always disordered...

Abstract Using version 2.0 of the TIMED/SABER kinetic temperature data, we have conducted a study on annual and interannual variations 6.5DWs at 20–110 km, from 52°S to 52°N for 2002–2016. First, obtained global in spectral power amplitudes 6.5DWs. We found that strong wave emerged 25°S/N 52°S/N peaked altitudes stratosphere, mesosphere, lower thermosphere. The are similar both hemispheres but different various altitudes. At 40–50 maxima emerge mostly winters. In MLT, peaks occurred twice...

We investigate the impact of 3d-electron configuration on magnetic and DC conductive properties La2MMnO6 (M = Co, Ni, Cu, Zn) offer evidence to an enhanced ionic ordering degree with increase in 3d electron number M ion. A key role electronic that influences B-site arrangement is revealed by changing both radii bond covalency. The position valence band edge shifted away from Fermi level electrons, which reveals a strengthened localization behavior. Magnetic characterization indicates Zn...