https://novaprd-lb.newcastle.edu.au/vital/access/manager/Index ${session.getAttribute("locale")} 5 Determination of the altitudinal peak of Cosmic Noise Absorption using a vertical parallax technique https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3461 Wed 24 Jul 2013 22:22:24 AEST ]]> Is there a causal relationship between cosmic noise absorption and PMSE? https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3432 Wed 24 Jul 2013 22:22:16 AEST ]]> Observations of Pi2 pulsations by the Wallops HF radar in association with substorm expansion https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3310 Wed 11 Apr 2018 17:20:44 AEST ]]> Ground magnetometer observation of a cross-phase reversal at a steep plasmapause https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3254 Wed 11 Apr 2018 17:06:56 AEST ]]> Improvement of SuperDARN velocity measurements by estimating the index of refraction in the scattering region using interferometry https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:6845 Wed 11 Apr 2018 17:04:44 AEST ]]> Multipoint visualization of ULF oscillations using the Super Dual Auroral Radar Network https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:19525 Wed 11 Apr 2018 17:00:38 AEST ]]> P-T-t-deformation framework of an accretionary prism, southern New England Orogen, eastern Australia: implications for blueschist exhumation and metamorphic switching https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4819 Wed 11 Apr 2018 16:53:24 AEST ]]> Bayesian analysis of input uncertainty in hydrological modeling: 1. theory https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:1276 Wed 11 Apr 2018 16:49:44 AEST ]]> Modeling of the ionospheric Alfvén resonator in dipolar geometry https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:14006 Wed 11 Apr 2018 16:47:31 AEST ]]> Upstream Pc3-4 waves: experimental evidence of propagation to the nightside plasmapause/plasmatrough https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10962 Wed 11 Apr 2018 16:21:53 AEST ]]> Mass and electron densities in the inner magnetosphere during a prolonged disturbed interval https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3259 Wed 11 Apr 2018 16:08:23 AEST ]]> ULF Doppler oscillations in the low latitude ionosphere https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3260 Wed 11 Apr 2018 15:36:10 AEST ]]> Modeling the observed proton aurora and ionospheric convection responses to changes in the IMF clock angle: 1. persistance of cusp proton aurora https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3400 Wed 11 Apr 2018 15:32:00 AEST ]]> Climate-informed stochastic hydrological modeling: incorporating decadal-scale variability using paleo data https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:9505 5 yr, and is rejected in favor of a gamma distribution for simulating the run lengths of the wet/dry IPO-PDO states. For the second level of the hierarchy, a seasonal rainfall model is conditioned on the simulated IPO-PDO state. The model is able to replicate observed statistics such as seasonal and multiyear accumulated rainfall distributions and interannual autocorrelations. Mean seasonal rainfall in the IPO-PDO dry states is found to be 15%–28% lower than the wet state at the case study sites. In comparison, an annual lag-one autoregressive model is unable to adequately capture the observed rainfall distribution within separate IPO-PDO states.]]> Wed 11 Apr 2018 15:27:36 AEST ]]> On the spatial distribution of decameter-scale subauroral ionospheric irregularities observed by SuperDARN radars https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:20533 Wed 11 Apr 2018 15:07:31 AEST ]]> Remote sensing space weather events: Antarctic-Arctic Radiation-belt (Dynamic) Deposition-VLF Atmospheric Research Konsortium network https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:6846 Wed 11 Apr 2018 15:05:10 AEST ]]> Statistical relationship between large-scale upward field-aligned currents and electron precipitation https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:19512 5% contribution from protons, identified by Lyman-alpha intensity, were excluded from the analysis. The Birkeland currents were derived with a spatial resolution of 3° in latitude and 2 h in local time. For southward interplanetary magnetic field (IMF), the electron precipitation occurred primarily within and near large-scale upward currents. The correspondence was less evident for northward IMF, presumably because the spatial variability is large compared to the areas of interest so that the number of events identified is smaller and the derived statistical distributions are less reliable. At dusk, the correlation between upward current and precipitation was especially high, where a larger fraction of the electron precipitation is accelerated downward by a field-aligned potential difference. Unaccelerated electron precipitation dominated in the morning sector, presumably induced by scattering of eastward-drifting energetic electrons into the loss cone through interaction with whistler-mode waves (diffuse precipitation) rather than by field-aligned acceleration. In the upward Region 1 on the dayside, where the electron precipitation is almost exclusively due to field-aligned acceleration, a quadratic relationship between current density and electron energy flux was observed, implying a linear current-voltage relationship in this region. Current density and electron energy flux in the regions of the large-scale upward currents from pre-midnight through dawn to noon are essentially uncorrelated, consistent with diffuse electron precipitation dominating the incident energy flux.]]> Wed 11 Apr 2018 14:53:12 AEST ]]> The 8 June 2000 ULF wave activity: a case study https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:13516 Wed 11 Apr 2018 14:42:09 AEST ]]> Seasonal clockwise gyration and tilt of the Australian continent chasing the center of mass of the Earth's system from GPS and GRACE https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:27686 Wed 11 Apr 2018 14:39:58 AEST ]]> Ecogeomorphic coevolution of semiarid hillslopes: emergence of banded and striped vegetation patterns through interaction of biotic and abiotic processes https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:14198 Wed 11 Apr 2018 14:19:39 AEST ]]> Propagation of electromagnetic ion cyclotron wave energy in the magnetosphere https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:1575 Wed 11 Apr 2018 14:16:48 AEST ]]> Comment on 'An integrated hydrologic Bayesian multimodel combination framework: confronting input, parameter, and model structural uncertainty in hydrologic prediction'' by Newsha K. Ajami et al https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:6842 Wed 11 Apr 2018 14:16:15 AEST ]]> Ancient numerical daemons of conceptual hydrological modeling: 1. fidelity and efficiency of time stepping schemes https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10990 Wed 11 Apr 2018 14:12:36 AEST ]]> Phase coherence analysis of a field line resonance and solar wind oscillation https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4825 Wed 11 Apr 2018 14:11:21 AEST ]]> Understanding predictive uncertainty in hydrologic modeling: the challenge of identifying input and structural errors https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10942 Wed 11 Apr 2018 14:09:47 AEST ]]> Geomagnetically induced currents in the New Zealand power network https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:13517 Wed 11 Apr 2018 14:05:16 AEST ]]> Ancient numerical daemons of conceptual hydrological modeling: 2. impact of time stepping schemes on model analysis and prediction https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10966 Wed 11 Apr 2018 14:00:32 AEST ]]> Transition of Pi2 ULF wave polarization structure from the ionosphere to the ground https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:14005 Wed 11 Apr 2018 13:58:36 AEST ]]> An empirical model of the quiet daily geomagnetic field variation https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:15977 Wed 11 Apr 2018 13:53:31 AEST ]]> Spectral analysis of pipe-to-soil potentials with variations of the Earth's magnetic field in the Australian region https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10963 Wed 11 Apr 2018 13:47:58 AEST ]]> Spontaneous formation and degradation of pool-riffle morphology and sediment sorting using a simple fractional transport model https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:20496 Wed 11 Apr 2018 13:40:24 AEST ]]> Longitudinal and seasonal variations in plasmaspheric electron density: implications for electron precipitation https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3258 Wed 11 Apr 2018 13:39:04 AEST ]]> Critical evaluation of parameter consistency and predictive uncertainty in hydrological modeling: a case study using Bayesian total error analysis https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:6843 Wed 11 Apr 2018 13:16:58 AEST ]]> ULF Doppler oscillations of L=2.5 flux tubes https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:1137 Wed 11 Apr 2018 13:05:54 AEST ]]> Spatial uncertainty of (137)Cs-derived net (1950s-1990) soil redistribution for Australia https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:14371 137Cs) technique has been used successfully in many parts of the world to estimate net (ca. 30–50 years) soil redistribution by wind and water erosion and tillage activities. The point‐based technique has hitherto been confined largely to individual fields and hillslopes, particularly in Australia. Its application here to the Australian continent (≈5 km grid) was achieved using geostatistics and nationally coordinated measurements (early 1990s) from ≈200 locations at the ≈1 km scale. A map of the 137Cs reference inventory for Australia has been previously established. Sequential indicator co‐simulation of the 137Cs inventory and the Australian Soil Classification was used to estimate net (between mid‐1950s and early 1990s) soil redistribution using the Australian Empirical Model. This geostatistical approach showed that nearly five times more soil was lost from cultivated land (−4.29 to +0.17t ha-1 yr-1) than from uncultivated (−0.91 to +0.05t ha-1yr-1) land in Australia. This information on spatial uncertainty is essential for regional soil management to assess the risk to soil conservation. Soil erosion exceeding a tolerable threshold value (e.g., 0.5 t ha-1 yr-1) occurred over 16% of Australia, mainly in cultivated regions (median = −1.26t ha-1yr-1). Soil erosion estimates are neglected in carbon balances for greenhouse gas abatement and carbon accounting models. Reliable quantitative data on the recent extent and rates of soil erosion are needed to underpin the selection of effective soil conservation measures, to inform carbon balances and to understand regional soil function for sustainable agricultural systems.]]> Wed 11 Apr 2018 13:01:35 AEST ]]> Propagation of electromagnetic ion cyclotron wave energy in the magnetosphere https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:305 Wed 11 Apr 2018 12:54:14 AEST ]]> Elements of a flexible approach for conceptual hydrological modeling: 1. motivation and theoretical development https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:15968 Wed 11 Apr 2018 12:35:37 AEST ]]> Relationship between ULF wave mode mix, equatorial electric fields, and ground magnetometer data https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:13514 vg, with the radial electric field component in the equatorial plane of the magnetosphere, eveq, via the fields in the ionosphere. In this paper we use a fully coupled ULF wave model to determine the ratio eveq/bvg for a 5 mHz FLR formed at high latitudes. We find that Ozeke et al. (2009) underestimated the ULF wave magnetic field on the ground which varies with ionosphere Hall conductance. This difference is found to be caused by assuming a decoupled wave mode model for the ionosphere fields. Any relationship that involves ULF wavefields in the ionosphere must include the effects of ULF wave mode mixing.]]> Wed 11 Apr 2018 12:31:29 AEST ]]> Technique: large-scale ionospheric conductance estimated from combined satellite and ground-based electromagnetic data https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3499 Wed 11 Apr 2018 12:31:12 AEST ]]> Predicting stress distributions in fold-and-thrust belts and accretionary wedges by optimization https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:7306 Wed 11 Apr 2018 12:25:38 AEST ]]> A limited-memory acceleration strategy for MCMC sampling in hierarchical Bayesian calibration of hydrological models https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10965 Wed 11 Apr 2018 12:21:41 AEST ]]> Field line resonant frequencies and ionospheric conductance: results from a 2-D MHD model https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4837 Wed 11 Apr 2018 12:12:48 AEST ]]> A preliminary risk assessment of the Australian region power network to space weather https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:13515 y indices of 50, 100, 250, and 600 corresponding to the risk levels of “low,” “moderate,” “high,” and “extreme,” respectively. Analysis of GICy indices derived from Australian magnetometer data shows that only southern Australian regions reached the “moderate” risk levels defined in this study with mainland southern Australia stations reaching this risk level twice over the previous two solar cycles. Southern Australian regions such as Tasmania reached moderate levels approximately 20 times during the previous solar cycle. Furthermore, elevated risk levels are typically only observed in Australia during solar maximum and its decline phase.]]> Wed 11 Apr 2018 11:49:40 AEST ]]> Relativistic electron loss due to ultralow frequency waves and enhanced outward radial diffusion https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10964 2 MeV electron flux observed at geosynchronous orbit, starting at 00 UT on 25 June 2008, is attributed to a rapid (1–4 h) nonadiabatic loss process. ULF waves were observed by the THEMIS-A, -D, and -E probes in the afternoon-to-dusk sector from the magnetopause to geosynchronous altitude. Estimates of the electron resonant energies indicate strong drift resonant interactions occurring between the energetic electrons and the observed waves. The rate of outward radial diffusion was estimated for MeV electrons using the observed ULF wave azimuthal electric field and compressional magnetic field and the diffusion time (~2.5 h) was found to be in good agreement with the observed time for nonadiabatic flux decreases at geosynchronous orbit. The magnetopause was compressed inside of its nominal position because of increased solar wind dynamic pressure. The electron loss is interpreted as a combination of magnetopause shadowing (from the compressed magnetosphere) and enhanced outward diffusion from ULF wave-particle drift resonant interactions. The enhanced day-night asymmetry of the MeV electron drift path from the compression suggests that enhanced losses may have also occurred around local noon as well as in the afternoon-to-dusk sector.]]> Wed 11 Apr 2018 11:48:02 AEST ]]> Combining site and regional flood information using a Bayesian Monte Carlo approach https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:6844 Wed 11 Apr 2018 11:45:04 AEST ]]> Quarter-wave modes of standing Alfvén waves detected by cross-phase analysis https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4836 Wed 11 Apr 2018 11:44:59 AEST ]]> Toward a reliable decomposition of predictive uncertainty in hydrological modeling: characterizing rainfall errors using conditional simulation https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:15366 Wed 11 Apr 2018 11:37:54 AEST ]]> Modeling weathering pathways and processes of the fragmentation of salt weathered quartz-chlorite schist https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4831 Wed 11 Apr 2018 10:57:25 AEST ]]> Flood frequency censoring errors associated with daily-read flood observations https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3008 Wed 11 Apr 2018 10:56:24 AEST ]]> Observations of geomagnetically induced currents in the Australian power network https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:14007 Wed 11 Apr 2018 10:54:18 AEST ]]> Plasmaspheric dynamics resulting from the Hallowe'en 2003 geomagnetic storms https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:6847 Wed 11 Apr 2018 10:21:51 AEST ]]> The mARM spatially distributed soil evolution model: a computationally efficient modeling framework and analysis of hillslope soil surface organization https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:7281 Wed 11 Apr 2018 10:18:13 AEST ]]> Energetic electron precipitation during substorm injection events: high-latitude fluxes and an unexpected midlatitude signature https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4834 Wed 11 Apr 2018 10:16:13 AEST ]]> Revised time-of-flight calculations for high-latitude geomagnetic pulsations using a realistic magnetospheric magnetic field model https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3311 Wed 11 Apr 2018 09:40:09 AEST ]]> Analytical approximation for the recession of a sloping aquifer https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:19457 Wed 11 Apr 2018 09:30:05 AEST ]]> Ground observations of high-latitude Pc3-4 ULF waves https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:262 0.6) across the entire station array. Most of these had well-defined wave packet appearance in time series records and a clear peak in power spectra. Their occurrence and frequency suggest the waves are generated by the upstream ion-cyclotron resonance mechanism, with no evidence of generation by the Kelvin-Helmholtz instability. For each event the amplitude, phase, coherence, ellipticity, azimuth angle, and degree of polarization across the ground array were examined. The coherence length, azimuthal wave number, and hence the apparent wave propagation velocity were thus determined, with emphasis on the precision and significance of these measurements. It was found that these daytime Pc3-4 pulsations usually have maximum amplitude near the magnetopause projection, meridional coherence lengths of order 1.5-2.0 x 10(3) km, and low azimuthal wave numbers during morning hours, averaging around -4.0 (indicating westward propagation). Over 80% of events propagated poleward and westward, with average equivalent ground velocity of 41 km/s N43 degrees W for the H component. About 24-30% of the events are higher harmonics of field line resonances. There is no evidence that the remaining events arise from cavity modes or localized modulated electron precipitation. The observations instead suggest a mechanism involving mode coupling and field-guided propagation. In this model, fast mode waves in the Pc3-4 range entering near the subsolar point propagate earthward and due to the inhomogeneity of the magnetosphere couple to the field-guided Alfven mode. At certain latitudes, standing oscillations are established at harmonics of the local resonant frequency, while at other latitudes traveling waves convey energy to low altitudes. The expected L dependence of wave power and travel time agree well with observed amplitude and phase profiles.]]> Wed 11 Apr 2018 09:26:46 AEST ]]> Optimizing water supply headworks operating rules under stochastic inputs: Assessment of genetic algorithm performance https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:188 Wed 11 Apr 2018 09:19:47 AEST ]]> Impact of temporal data resolution on parameter inference and model identification in conceptual hydrological modeling: insights from an experimental catchment https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:13521 Wed 11 Apr 2018 09:19:41 AEST ]]> Reduction in field-aligned currents preceding and local to auroral substorm onset https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:13518 Wed 11 Apr 2018 09:16:12 AEST ]]> Pursuing the method of multiple working hypotheses for hydrological modeling https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:15969 Wed 11 Apr 2018 09:13:42 AEST ]]> Novel Along-Track Processing of GRACE Follow-On Laser Ranging Measurements Found Abrupt Water Storage Increase and Land Subsidence During the 2021 March Australian Flooding https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:44039 Wed 05 Oct 2022 15:26:03 AEDT ]]> Classification of Pc1-2 electromagnetic ion cyclotron waves at geosynchronous orbit https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:21768 Tue 08 Dec 2015 08:57:57 AEDT ]]> Nonparametric data assimilation scheme for land hydrological applications https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:33497 Tue 03 Sep 2019 17:54:34 AEST ]]> North-south asymmetry of the amplitude of high-latitude Pc 3-5 pulsations: Observations at conjugate stations https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:480 Thu 25 Jul 2013 09:09:53 AEST ]]> A time series approach to inferring groundwater recharge using the water table fluctuation method https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:160 Thu 25 Jul 2013 09:09:41 AEST ]]> Nature and causes of protracted droughts in southeast Australia: comparison between the Federation, WWII, and Big Dry droughts https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:6946 Thu 20 Oct 2022 13:29:11 AEDT ]]> Steps toward "useful" hydroclimatic scenarios for water resource management in the Murray-Darling Basin https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:15970 Thu 20 Oct 2022 13:28:30 AEDT ]]> Indian Ocean sea surface temperature variability and winter rainfall: Eastern Australia https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:608 Thu 20 Oct 2022 09:45:17 AEDT ]]> Long-term behaviour of ENSO: interactions with the PDO over the past 400 years inferred from paleoclimate records https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:1269 Thu 20 Oct 2022 09:39:40 AEDT ]]> Representing spatial variability of snow water equivalent in hydrologic and land-surface models: a review https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:15978 Thu 12 Apr 2018 13:20:00 AEST ]]> Remote sensing the magnetosphere using ground-based observations of ULF waves https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:2239 Sat 24 Mar 2018 11:11:37 AEDT ]]> Multipoint observations of Pc1-2 waves in the afternoon sector https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:7819 Sat 24 Mar 2018 08:37:35 AEDT ]]> Transverse-scale size of Pc3 ULF waves near the exterior cusp https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:7818 Sat 24 Mar 2018 08:37:35 AEDT ]]> No evidence for externally triggered substorms based on superposed epoch analysis of IMF B-z https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:7606 Sat 24 Mar 2018 08:34:44 AEDT ]]> Spatial organization of soil depths using a landform evolution model https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:867 Sat 24 Mar 2018 08:31:31 AEDT ]]> Stalagmite evidence for the onset of the Last Interglacial in southern Europe at 129 ± 1 ka https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:1524 Sat 24 Mar 2018 08:30:48 AEDT ]]> The relationship between plasma density structure and EMIC waves at geosynchronous orbit https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:2395 Sat 24 Mar 2018 08:29:30 AEDT ]]> Kinematic dispersion effects of hillslope velocities https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:2408 Sat 24 Mar 2018 08:29:28 AEDT ]]> Electromagnetic ion cyclotron waves in the magnetosphere https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:2240 Sat 24 Mar 2018 08:29:03 AEDT ]]> Heavy ion mass loading of the geomagnetic field near the plasmapause and ULF wave implications https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:1768 Sat 24 Mar 2018 08:27:36 AEDT ]]> A coastal retracking system for satellite radar altimeter waveforms: application to ERS-2 around Australia https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:2444 Sat 24 Mar 2018 08:26:53 AEDT ]]> Plasma refilling rates for L = 2.3-3.8 flux tubes https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10740 3.3. Plasmaspheric refilling progressed with a clear diurnal variation associated with linearly increasing plasma density in the daytime and decreasing plasma density at nighttime. The daytime increases in plasma mass density related to refilling rates ranging from ~250 to ~13 amu cm⁻³ h⁻¹ over L = 2.3–3.8. The resultant upward plasma flux at the 1000 km level was in the range 0.9–5.2 × 10⁸ amu cm⁻² s⁻¹. We also determined the daily averaged refilling rate to be ~420 amu cm⁻³ d⁻¹ at L = 2.9–3.1, including the nighttime downward flux. By comparison with Imager for Magnetopause-to-Aurora Global Exploration–EUV and VLF whistler data we were able to estimate the plasma composition and found the O⁺ proportion was of order 3%–7% at L = 2.3 and 6%–13% at L = 3.0.]]> Sat 24 Mar 2018 08:14:29 AEDT ]]> The mARM3D spatially distributed soil evolution model: three-dimensional model framework and analysis of hillslope and landform responses https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10682 Sat 24 Mar 2018 08:09:30 AEDT ]]> EMIC wave activity during geomagnetic storm and nonstorm periods: CRRES results https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10987 Sat 24 Mar 2018 08:07:56 AEDT ]]> Energetic outer radiation belt electron precipitation during recurrent solar activity https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10989 300 keV and ~1 MeV trapped electrons, and also consistent with the daily average ULF (ultralow frequency) Pc1–2 power (L = 3.9) from Lucky Lake, Canada, which was elevated during the ~1 MeV electron precipitation period. This suggests that Pc1–2 waves may play a role in outer radiation belt loss processes during this interval. We show that the >300 keV trapped electron flux from POES is a reasonable proxy for electron precipitation during recurrent high-speed solar wind streams, although it did not describe all of the variability that occurred. While energetic electron precipitation can be described through a proxy such as Kp or Dst, careful incorporation of time delays for different electron energies must be included. Dst was found to be the most accurate proxy for electron precipitation during the weak recurrent-activity period studied.]]> Sat 24 Mar 2018 08:07:56 AEDT ]]> Storm time observations of electromagnetic ion cyclotron waves at geosynchronous orbit: GOES results https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:10988 Sat 24 Mar 2018 08:07:55 AEDT ]]> Heavy ion mass loading of the geomagnetic field near the plasmapause and ULF wave implications https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:282 Sat 24 Mar 2018 07:42:51 AEDT ]]> Observing the open-closed boundary using cusp-latitude magnetometers https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:50 Sat 24 Mar 2018 07:42:00 AEDT ]]> On the association between northward turnings of the interplanetary magnetic field and substorm onsets https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3245 Sat 24 Mar 2018 07:23:17 AEDT ]]> Horizontal amplitude and phase structure of low-latitude Pc 3 pulsations around the dawn terminator https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3342 Sat 24 Mar 2018 07:22:35 AEDT ]]> A coastal retracking system for satellite radar altimeter waveforms: application to ERS-2 around Australia https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3444 Sat 24 Mar 2018 07:20:28 AEDT ]]> Estimating relativistic electron pitch angle scattering rates using properties of the electromagnetic ion cyclotron wave spectrum https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3462 Sat 24 Mar 2018 07:20:27 AEDT ]]> A methodology for calculating the spatial distribution of the area-slope equation and the hypsometric integral within a catchment https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4824 Sat 24 Mar 2018 07:18:53 AEDT ]]> Phase structure of Pc3 waves observed by Cluster and ground stations near the cusp https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4853 Sat 24 Mar 2018 07:18:52 AEDT ]]> High-speed solar wind streams: a call for key research https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4835 Sat 24 Mar 2018 07:18:51 AEDT ]]> Regional methods for trend detection: assessing field significance and regional consistency https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:4840 Sat 24 Mar 2018 07:18:48 AEDT ]]> Kinky profiles: effects of soil surface heating upon vertical dust concentration profiles in the Channel Country of western Queensland, Australia https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:3176 Sat 24 Mar 2018 07:18:11 AEDT ]]> Relating wave attenuation to pancake ice thickness, using field measurements and model results https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:28230 -1) were calculated from in situ data transmitted by custom wave buoys deployed into the advancing pancake ice region of the Weddell Sea. Data cover a 12day period as the buoy array was first compressed and then dilated under the influence of a passing low-pressure system. Attenuation was found to vary over more than 2 orders of magnitude and to be far higher than that observed in broken-floe marginal ice zones. A clear linear relation between a and ice thickness was demonstrated, using ice thickness from a novel dynamic/thermodynamic model. A simple expression for a in terms of wave period and ice thickness was derived, for application in research and operational models. The variation of a was further investigated with a two-layer viscous model, and a linear relation was found between eddy viscosity in the sub-ice boundary layer and ice thickness.]]> Mon 30 Oct 2023 15:41:03 AEDT ]]> A tale of two riffles: using multidimensional, multifractional, time-varying sediment transport to assess self-maintenance in pool-riffle sequences https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:30589 Fri 24 Aug 2018 09:03:28 AEST ]]> CubeSat GPS Observation of Traveling Ionospheric Disturbances After the 2022 Hunga‐Tonga Hunga‐Ha'apai Volcanic Eruption and Its Potential Use for Tsunami Warning https://novaprd-lb.newcastle.edu.au/vital/access/manager/Repository/uon:51959 550 km) from CubeSat GPS tracking data. The satellite sampling along many CubeSat orbits enable to map broader spatio-temporal patterns of the TID propagation compared to ground receivers. Due to the larger spatial coverage over a shorter period of time, the CubeSat measurements provide complementary information to stationary ground receivers. We found that the amplitude of the HTHH-induced ionospheric perturbations at high altitudes (>550 km) are as large as 10 TECU (1 TECU = 1016 electrons/m2) in slant total electron content between CubeSats and GPS satellites. The TIDs traveled along with the Lamb waves and were recorded by CubeSats above India 12 hr after the eruption and at the antipode of the eruption 16 hr after. These suggest that the ionospheric disturbances reached to the high altitudes and traveled globally as a speed of ∼350 m/s. The TIDs were also detected by CubeSats above the Australian continent several hours before the (conventional) tsunami made landfall on the Australian coasts. We discuss a new opportunity to study the upper ionosphere and its coupling with the solid Earth and to develop advanced monitoring systems of geohazards by the advent of low-cost small satellite technology.]]> Fri 22 Sep 2023 17:04:28 AEST ]]>