Polarimetric radar observations of dust storms at C- and S-band

Broeke, Matthew S. Van Den; Alsarraf, Hussain

doi:10.15191/nwajom.2016.0409

Cited by 6 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We speculate that this increase may have been related to convergence on the edge of the convective cell. High particle concentration has been noted previously along convective outflow boundaries [42,43].…”

Section: Comparison Of Disdrometer Polarimetric Radar and Cn Datasetssupporting

confidence: 59%

Disdrometer, Polarimetric Radar, and Condensation Nuclei Observations of Supercell and Multicell Storms on 11 June 2018 in Eastern Nebraska

Broeke

2020

Atmosphere

Self Cite

View full text Add to dashboard Cite

Disdrometer and condensation nuclei (CN) data are compared with operational polarimetric radar data for one multicell and one supercell storm in eastern Nebraska on 11 June 2018. The radar was located ~14.3 km from the instrumentation location and provided excellent observation time series with new low-level samples every 1–2 min. Reflectivity derived by the disdrometer and radar compared well, especially in regions with high number concentration of drops and reflectivity <45 dBZ. Differential reflectivity also compared well between the datasets, though it was most similar in the supercell storm. Rain rate calculated by the disdrometer closely matched values estimated by the radar when reflectivity and differential reflectivity were used to produce the estimate. Concentration of CN generally followed precipitation intensity for the leading convective cell, with evidence for higher particle concentration on the edges of the convective cell associated with outflow. The distribution of CN in the supercell was more complex and generally did not follow precipitation intensity.

show abstract

Section: Comparison Of Disdrometer Polarimetric Radar and Cn Datasetssupporting

confidence: 59%

Disdrometer, Polarimetric Radar, and Condensation Nuclei Observations of Supercell and Multicell Storms on 11 June 2018 in Eastern Nebraska

Broeke

2020

Atmosphere

Self Cite

View full text Add to dashboard Cite

show abstract

“…We extended the formalism used in Refs. [17][18][19][20]22] to investigate HOTIs, where the bulk-boundary correspondence relates the closure of the band gap with the zero modes that occur at the corners of the system. We numerically calculated the spectrum of Hamiltonian (1), which was proposed in Ref.…”

Section: Discussionmentioning

confidence: 99%

“…The solution to this conundrum is provided by an approach inspired by Hill thermodynamics [17][18][19][20][21][22]. Within this method, the system is divided into many subsets and the thermodynamic identity is derived without the assumption of extensivity of the energy.…”

Section: Thermodynamics Of the Quadrupolar Phase Transitionmentioning

confidence: 99%

“…A very interesting question posed by this kind of topological phase is the fate of the bulk-boundary correspondence [16]. A thermodynamic analysis of topological quantum phase transitions (TQPT) [17][18][19][20] inspired by Hill's thermodynamics [21] has been successful in describing the critical behaviour of several models and recently this method was used to devise topological heat machines [22]. Here, we extend this thermodynamical approach to describe HOTIs, i.e., to deal with systems that have both edge and corner modes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermodynamics of a higher-order topological insulator

Arouca

Kempkes

Smith

2020

Phys. Rev. Research

View full text Add to dashboard Cite

We investigate the order of the topological quantum phase transition in a two dimensional quadrupolar topological insulator within a thermodynamic approach. Using numerical methods, we separate the bulk, edge and corner contributions to the grand potential and detect different phase transitions in the topological phase diagram. The transitions from the quadrupolar to the trivial or to the dipolar phases are well captured by the thermodynamic potential. On the other hand, we have to resort to a grand potential based on the Wannier bands to describe the transition from the trivial to the dipolar phase. The critical exponents and the order of the phase transitions are determined and discussed in the light of the Josephson hyperscaling relation. * r.aroucadealbuquerque@uu.nl † S.N.Kempkes@uu.nl ‡ C.deMoraisSmith@uu.nl arXiv:1912.09159v1 [cond-mat.stat-mech]

show abstract

“…Since the proposal of non-trivial topology in some special Kondo insulators (KI) [1][2][3][4], renewed attention has been attracted on these old materials, now are known as 'topological Kondo insulators'(TKI) represented by SmB 6 [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. In these TKIs, the strong spin-orbit coupling in the hybridization between d and f electrons guarantees time-reversal symmetry (TRS) and generates a band inversion between d and f states at certain time-reversal-invariant momenta (TRIM), which are the eight high-symmetry points in three-dimensional (3D) Brillouin zone (BZ), leading to the Z 2 classification of the Kondo insulating states into strong topological insulator (STI), weak topological insulator (WTI) and normal Kondo insulator (nKI) [3,4,6,21,22].…”

Section: Introductionmentioning

confidence: 99%

Valence transition in topological Kondo insulator

Zhuang

Zheng

Wang

et al. 2019

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

We investigate the valence transition in three-dimensional topological Kondo insulator through slave-boson analysis of periodic Anderson model. By including the effect of intra-atomic Coulomb correlation U f c between conduction and local electrons, we find a first-order valence transition from Kondo region to mixed valence upon ascending of local level above a critical U f c , and this valence transition usually occurs very close to or simultaneously with a topological transition. Near the parameter region of zero-temperature valence transition, rise of temperature can generate a thermal valence transition from mixed valence to Kondo region, accompanied by a first-order topological transition. Remarkably, above a critical U f c which is considerable smaller than that generating paramagnetic valence transition, the original continuous antiferromagnetic transition is shifted to first order one, at which a discontinuous valence shift takes place. Upon increased U f c , the paramagnetic valence transition approaches then converges with the first-order antiferromagnetic transition, leaving an significant valence shift on the magnetic boundary. The continuous antiferromagnetic transition, first-order antiferromagnetic transition, paramagnetic valence transition and topological transitions are all summarized in a global phase diagram. Our proposed exotic transition processes can help to understand the thermal valence variation as well as the valence shift around the pressure-induced magnetic transition in topological Kondo insulator candidates and in other heavy-fermion systems.

show abstract

Polarimetric radar observations of dust storms at C- and S-band

Abstract: Van Den Broeke, M. S., and H. Alsarraf, 2016: Polarimetric radar observations of dust storms at 4 (9)

Cited by 6 publications

References 28 publications

Disdrometer, Polarimetric Radar, and Condensation Nuclei Observations of Supercell and Multicell Storms on 11 June 2018 in Eastern Nebraska

Disdrometer, Polarimetric Radar, and Condensation Nuclei Observations of Supercell and Multicell Storms on 11 June 2018 in Eastern Nebraska

Thermodynamics of a higher-order topological insulator

Valence transition in topological Kondo insulator

Contact Info

Product

Resources

About