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1

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An Aircraft-Based Upper Troposphere Lower Stratosphere O3, CO, and H2O Climatology for the Northern Hemisphere (2010)

Spelten, N. ; Pittman, J. V. ; Avery, M. A. ; [weitere]

In: Other Sources

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Publikationsdatum: 2019-08-26

Beschreibung: We present a climatology of O3, CO, and H2O for the upper troposphere and lower stratosphere (UTLS), based on a large collection of high ]resolution research aircraft data taken between 1995 and 2008. To group aircraft observations with sparse horizontal coverage, the UTLS is divided into three regimes: the tropics, subtropics, and the polar region. These regimes are defined using a set of simple criteria based on tropopause height and multiple tropopause conditions. Tropopause ]referenced tracer profiles and tracer ]tracer correlations show distinct characteristics for each regime, which reflect the underlying transport processes. The UTLS climatology derived here shows many features of earlier climatologies. In addition, mixed air masses in the subtropics, identified by O3 ]CO correlations, show two characteristic modes in the tracer ]tracer space that are a result of mixed air masses in layers above and below the tropopause (TP). A thin layer of mixed air (1.2 km around the tropopause) is identified for all regions and seasons, where tracer gradients across the TP are largest. The most pronounced influence of mixing between the tropical transition layer and the subtropics was found in spring and summer in the region above 380 K potential temperature. The vertical extent of mixed air masses between UT and LS reaches up to 5 km above the TP. The tracer correlations and distributions in the UTLS derived here can serve as a reference for model and satellite data evaluation

Schlagwort(e): Meteorology and Climatology

Materialart: Journal of Geophysical Research (ISSN 0148-0227); 115; D14303

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Infrared spectrum and its implications for the electronic structure of the semiconducting iron selenide K_{0.83}Fe_{1.53}Se_{2} (2011)

Z. G. Chen, R. H. Yuan, T. Dong, G. Xu, Y. G. Shi, P. Zheng, J. L. Luo, J. G. Guo, X. L. Chen, and N. L. Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-17

Beschreibung: Author(s): Z. G. Chen, R. H. Yuan, T. Dong, G. Xu, Y. G. Shi, P. Zheng, J. L. Luo, J. G. Guo, X. L. Chen, and N. L. Wang We report an infrared spectroscopy study on K 0.83 Fe 1.53 Se 2 , a semiconducting parent compound of the 245 iron selenide superconductors. The major spectral features are found to be distinctly different from all other Fe-based superconducting systems. Our measurement revealed two peculiar spectral stru... [Phys. Rev. B 83, 220507] Published Thu Jun 16, 2011

Schlagwort(e): Superfluidity and superconductivity

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Extended Drude model and role of interband transitions in the midinfrared spectra of pnictides (2011)

L. Benfatto, E. Cappelluti, L. Ortenzi, and L. Boeri

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-06-28

Beschreibung: Author(s): L. Benfatto, E. Cappelluti, L. Ortenzi, and L. Boeri We analyze the outcomes of an extended-Drude-model approach to the optical spectra of pnictides, where the multiband nature of the electronic excitations requires a careful analysis of the role of interband processes in the optical conductivity. Through a direct comparison between model calculations... [Phys. Rev. B 83, 224514] Published Mon Jun 27, 2011

Schlagwort(e): Superfluidity and superconductivity

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Three-dimensionality of band structure and a large residual quasiparticle population in Ba_{0.67} K_{0.33} Fe_{2} As_{2} as revealed by c-axis polarized optical measurements (2011)

B. Cheng, Z. G. Chen, C. L. Zhang, R. H. Ruan, T. Dong, B. F. Hu, W. T. Guo, S. S. Miao, P. Zheng, J. L. Luo, G. Xu, Pengcheng Dai, and N. L. Wang

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-04-23

Beschreibung: Author(s): B. Cheng, Z. G. Chen, C. L. Zhang, R. H. Ruan, T. Dong, B. F. Hu, W. T. Guo, S. S. Miao, P. Zheng, J. L. Luo, G. Xu, Pengcheng Dai, and N. L. Wang We report on a c-axis polarized optical measurement on a Ba_{0.67} K_{0.33} Fe_{2} As_{2} single crystal. We find that the c-axis optical response is significantly different from that of high-T_{c} cuprates. The experiments reveal an anisotropic three-dimensional (3D) optical response with the absen... [Phys. Rev. B 83, 144522] Published Fri Apr 22, 2011

Schlagwort(e): Superfluidity and superconductivity

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Peculiarities of the superconducting gaps and the electron-boson interaction in TmNi_{2}B_{2}C as seen by point-contact spectroscopy (2011)

Yu. G. Naidyuk, O. E. Kvitnitskaya, L. V. Tiutrina, I. K. Yanson, G. Behr, G. Fuchs, S.-L. Drechsler, K. Nenkov, and L. Schultz

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-09-20

Beschreibung: Author(s): Yu. G. Naidyuk, O. E. Kvitnitskaya, L. V. Tiutrina, I. K. Yanson, G. Behr, G. Fuchs, S.-L. Drechsler, K. Nenkov, and L. Schultz Point-contact (PC) investigations on the title compound in the normal and superconducting (SC) state ( T c ≃10.6 K) are presented. The temperature dependence of the SC gap of TmNi 2 B 2 C determined from Andreev-reflection (AR) spectra using the standard single-gap approximation (SGA) deviates from the BCS... [Phys. Rev. B 84, 094516] Published Mon Sep 19, 2011

Schlagwort(e): Superfluidity and superconductivity

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Antiferromagnetic order and superlattice structure in nonsuperconducting and superconducting Rb_{y}Fe_{1.6+x}Se_{2} (2011)

Meng Wang, Miaoyin Wang, G. N. Li, Q. Huang, C. H. Li, G. T. Tan, C. L. Zhang, Huibo Cao, Wei Tian, Yang Zhao, Y. C. Chen, X. Y. Lu, Bin Sheng, H. Q. Luo, S. L. Li, M. H. Fang, J. L. Zarestky, W. Ratcliff, M. D. Lumsden, J. W. Lynn, and Pengcheng Dai

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2011-09-13

Beschreibung: Author(s): Meng Wang, Miaoyin Wang, G. N. Li, Q. Huang, C. H. Li, G. T. Tan, C. L. Zhang, Huibo Cao, Wei Tian, Yang Zhao, Y. C. Chen, X. Y. Lu, Bin Sheng, H. Q. Luo, S. L. Li, M. H. Fang, J. L. Zarestky, W. Ratcliff, M. D. Lumsden, J. W. Lynn, and Pengcheng Dai Neutron diffraction has been used to study the lattice and magnetic structures of the insulating and superconducting Rb y Fe 1.6+ x Se 2 . For the insulating Rb y Fe 1.6+ x Se 2 , neutron polarization analysis and single-crystal neutron diffraction unambiguously confirm the earlier proposed √ 5 ×√ 5 block antiferrom... [Phys. Rev. B 84, 094504] Published Mon Sep 12, 2011

Schlagwort(e): Superfluidity and superconductivity

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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7

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Temporal and Spatial Aspects of Gas Release During the 2010 Apparition of Comet 103P/Hartley-2 (2011)

Paganini, L. ; Lippi, M. ; Magee-Sauer, K. ; [weitere]

In: CASI

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Publikationsdatum: 2019-07-13

Beschreibung: We report measurements of eight primary volatiles (H2O, HCN, CH4, C2H6, CH3OH, C2H2, H2CO, and NH3) and two product species (OH and NH2) in comet 103P/Hartley-2 using high dispersion infrared spectroscopy. We present production rates for individual volatiles species, their mixing ratios relative to water, and their spatial distributions in the coma on multiple dates that span the interval Sept. - Dec. 2010. The production rates vary strongly with nucleus rotation, but the mixing ratios remain constant throughout the campaign. The released primary volatiles exhibit diverse spatial properties which favor the presence of separate polar and apolar ice phases in the nucleus, establish dust and gas release from icy clumps (and also, directly from the nucleus), and provide insights into the driver for the cyanogen (CN) polar jet.

Schlagwort(e): Lunar and Planetary Science and Exploration

Materialart: GSFC.OVPR.4972.2011 , 43rd Annual DPS Meeting; Oct 02, 2011 - Oct 07, 2011; Nantes; France

Format: application/pdf

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Global Land Surface Emissivity Retrieved From Satellite Ultraspectral IR Measurements (2011)

Smith, W. L. ; Schlussel, P. ; Calbet, X. ; [weitere]

In: Other Sources

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Publikationsdatum: 2019-07-13

Beschreibung: Ultraspectral resolution infrared (IR) radiances obtained from nadir observations provide information about the atmosphere, surface, aerosols, and clouds. Surface spectral emissivity (SSE) and surface skin temperature from current and future operational satellites can and will reveal critical information about the Earth s ecosystem and land-surface-type properties, which might be utilized as a means of long-term monitoring of the Earth s environment and global climate change. In this study, fast radiative transfer models applied to the atmosphere under all weather conditions are used for atmospheric profile and surface or cloud parameter retrieval from ultraspectral and/or hyperspectral spaceborne IR soundings. An inversion scheme, dealing with cloudy as well as cloud-free radiances observed with ultraspectral IR sounders, has been developed to simultaneously retrieve atmospheric thermodynamic and surface or cloud microphysical parameters. This inversion scheme has been applied to the Infrared Atmospheric Sounding Interferometer (IASI). Rapidly produced SSE is initially evaluated through quality control checks on the retrievals of other impacted surface and atmospheric parameters. Initial validation of retrieved emissivity spectra is conducted with Namib and Kalahari desert laboratory measurements. Seasonal products of global land SSE and surface skin temperature retrieved with IASI are presented to demonstrate seasonal variation of SSE.

Schlagwort(e): Meteorology and Climatology

Materialart: NF1676L-9794 , Geoscience and Remote Sensing, IEEE Transactions on (ISSN 0196-2892); 49; 4; 1277-1290

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Evidence for Hesperian Impact-Induced Hydrothermalism on Mars (2010)

Gross, Christoph ; Bishop, Janice L. ; McKay, Chris P. ; [weitere]

In: Other Sources

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Publikationsdatum: 2019-07-13

Beschreibung: Several hydrated silicate deposits on Mars are observed within craters and are interpreted as excavated Noachian material. Toro crater (71.8 deg E, 17.0 deg N), located on the northern edge of the Syrtis Major Volcanic Plains, shows spectral and morphologic evidence of impact-induced hydrothermal activity. Spectroscopic observations were used to identify extensive hydrated silicate deposits, including prehnite, chlorites, smectites, and opaline material, a suite of phases that frequently results from hydrothermal alteration in terrestrial craters and also expected on Mars from geochemical modeling of hydrothermal environments. When combined with altimetry and high-resolution imaging data, these deposits appear associated predominantly with the central uplift and with portions of the northern part of the crater floor. Detailed geologic mapping of these deposits reveals geomorphic features that are consistent with hydrothermal activity that followed the impact event, including vent-like and conical mound structures, and a complex network of tectonic structures caused by fluid interactions such as fractures and joints. The crater age has been calculated from the cumulative crater size-frequency distributions and is found to be Early Hesperian. The evidence presented here provides support for impact-induced hydrothermal activity in Toro crater, that extends phyllosilicate formation processes beyond the Noachian era.

Schlagwort(e): Lunar and Planetary Science and Exploration

Materialart: Icarus; 208; 667-683

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The Ganymede Interior Structure, and Magnetosphere Observer (GISMO) Mission Concept (2011)

Gleeson, D. ; Ehsan, N. ; McEnulty, T. ; [weitere]

In: Other Sources

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Publikationsdatum: 2019-07-13

Beschreibung: The NASA Planetary Science Summer School (PSSS) at JPL offers graduate students and young professionals a unique opportunity to learn about the mission design process. Program participants select and design a mission based on a recent NASA Science Mission Directorate Announcement of Opportunity (AO). Starting with the AO, in this case the 2009 New Frontiers AO, participants generate a set of science goals and develop a early mission concept to accomplish those goals within the constraints provided. As part of the 2010 NASA PSSS, the Ganymede Interior, Surface, and Magnetosphere Observer (GISMO) team developed a preliminary satellite design for a science mission to Jupiter's moon Ganymede. The science goals for this design focused on studying the icy moon's magnetosphere, internal structure, surface composition, geological processes, and atmosphere. By the completion of the summer school an instrument payload was selected and the necessary mission requirements were developed to deliver a spacecraft to Ganymede that would accomplish the defined science goals. This poster will discuss those science goals, the proposed spacecraft and the proposed mission design of this New Frontiers class Ganymede observer.

Schlagwort(e): Lunar and Planetary Science and Exploration

Materialart: Lunar and Planetary Science Conference; Mar 07, 2011 - Mar 11, 2011; The Woodlands, TX; United States

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