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Metallic And Insulating Oxide Interfaces Controlled By Electronic Correlations, H. W. Jang, D. A. Felker, C. W. Bark, Y. Wang, Manish K. Niranjan, C. T. Nelson, Y. Zhang, D. Su, C. M. Folkman, S. H. Baek, S. Lee, K. Janicka, Y. Zhu, X. Q. Pan, D. D. Fong, Evgeny Y. Tsymbal, M. S. Rzchowski, Chang-Beom Eom 2011 University of Wisconsin - Madison

Metallic And Insulating Oxide Interfaces Controlled By Electronic Correlations, H. W. Jang, D. A. Felker, C. W. Bark, Y. Wang, Manish K. Niranjan, C. T. Nelson, Y. Zhang, D. Su, C. M. Folkman, S. H. Baek, S. Lee, K. Janicka, Y. Zhu, X. Q. Pan, D. D. Fong, Evgeny Y. Tsymbal, M. S. Rzchowski, Chang-Beom Eom

Evgeny Tsymbal Publications

The formation of two-dimensional electron gases (2DEGs) at complex oxide interfaces is directly influenced by the oxide electronic properties. We investigated how local electron correlations control the 2DEG by inserting a single atomic layer of a rare-earth oxide (RO) [(R is lanthanum (La), praseodymium (Pr), neodymium (Nd), samarium (Sm), or yttrium (Y)] into an epitaxial strontium titanate oxide (SrTiO3) matrix using pulsed-laser deposition with atomic layer control. We find that structures with La, Pr, and Nd ions result in conducting 2DEGs at the inserted layer, whereas the structures with Sm or Y ions are insulating. Our local spectroscopic and ...


Highly Spin-Polarized Conducting State At The Interface Between Nonmagnetic Band Insulators: Laalo3/Fes2 (001), John D. Burton, Evgeny Y. Tsymbal 2011 University of Nebraska-Lincoln

Highly Spin-Polarized Conducting State At The Interface Between Nonmagnetic Band Insulators: Laalo3/Fes2 (001), John D. Burton, Evgeny Y. Tsymbal

Evgeny Tsymbal Publications

First-principles density functional calculations demonstrate that a spin-polarized two-dimensional conducting state can be realized at the interface between two nonmagnetic band insulators. The (001) surface of the diamagnetic insulator FeS2 (pyrite) supports a localized surface state deriving from Fe d orbitals near the conduction band minimum. The deposition of a few unit cells of the polar perovskite oxide LaAlO3 leads to electron transfer into these surface bands, thereby creating a conducting interface. The occupation of these narrow bands leads to an exchange splitting between the spin subbands, yielding a highly spin-polarized conducting state distinct from the rest of ...


Tailoring A Two-Dimensional Electron Gas At The Laalo3 ∕ Srtio3 (001) Interface By Epitaxial Strain, C. W. Bark, D. A. Felker, Yong Wang, H. W. Jang, C. M. Folkman, J. W. Park, S. H. Baek, H. Zhou, D. D. Fong, X. Q. Pan, Evgeny Y. Tsymbal, M. S. Rzchowski, C. B. Eom 2011 University of Wisconsin - Madison

Tailoring A Two-Dimensional Electron Gas At The Laalo3 ∕ Srtio3 (001) Interface By Epitaxial Strain, C. W. Bark, D. A. Felker, Yong Wang, H. W. Jang, C. M. Folkman, J. W. Park, S. H. Baek, H. Zhou, D. D. Fong, X. Q. Pan, Evgeny Y. Tsymbal, M. S. Rzchowski, C. B. Eom

Evgeny Tsymbal Publications

Recently a metallic state was discovered at the interface between insulating oxides, most notably LaAlO3 and SrTiO3. Properties of this two-dimensional electron gas (2DEG) have attracted significant interest due to its potential applications in nanoelectronics. Control over this carrier density and mobility of the 2DEG is essential for applications of these unique systems, and may be achieved by epitaxial strain. However, despite the rich nature of strain effects on oxide materials properties, such as ferroelectricity, magnetism, and superconductivity, the relationship between the strain and electrical properties of the 2DEG at the LaAlO3∕SrTiO3 heterointerface remains largely ...


Transport Spin Polarization Of High-Curie Temperature Mnbi Films, Parashu Kharel, P. Thapa, Pavel V. Lukashev, Renat F. Sabirianov, Evgeny Y. Tsymbal, D. J. Sellmeyer, Boris Nadgorny 2011 University of Nebraska-Lincoln

Transport Spin Polarization Of High-Curie Temperature Mnbi Films, Parashu Kharel, P. Thapa, Pavel V. Lukashev, Renat F. Sabirianov, Evgeny Y. Tsymbal, D. J. Sellmeyer, Boris Nadgorny

Evgeny Tsymbal Publications

We report on the study of the structural, magnetic, and transport properties of highly textured MnBi films with the Curie temperature of 628 K. In addition to detailed measurements of resistivity and magnetization, we measure transport spin polarization of MnBi by Andreev reflection spectroscopy and perform fully relativistic band-structure calculations of MnBi. A spin polarization from 51% ± 1% to 63% ± 1% is observed, consistent with the calculations and with an observation of a large magnetoresistance in MnBi contacts. The band-structure calculations indicate that in spite of almost identical densities of states at the Fermi energy, the large disparity in the ...


Electron And Hole Traps In Ag-Doped Lithium Tetraborate (Li2b4o7) Crystals, A. T. Brant, B. E. Kananan, M. K. Murari, J. McClory, J. Petrosky, V. T. Adamiv, Ya. V. Burak, Peter A. Dowben, L. E. Halliburton 2011 West Virginia University, Morgantown

Electron And Hole Traps In Ag-Doped Lithium Tetraborate (Li2b4o7) Crystals, A. T. Brant, B. E. Kananan, M. K. Murari, J. Mcclory, J. Petrosky, V. T. Adamiv, Ya. V. Burak, Peter A. Dowben, L. E. Halliburton

Peter Dowben Publications

Electron paramagnetic resonance (EPR), electron-nuclear double resonance (ENDOR), and thermoluminescence (TL) are used to characterize the primary electron and hole trapping centers in a lithium tetraborate (Li2B4O7) crystal doped with Ag+. Three defects, two holelike and one electronlike, are observed after exposure at room temperature to 60 kV x-rays. The as-grown crystal contains both interstitial Ag+ ions and Ag+ ions substituting for Liþ ions. During the irradiation, substitutional Ag+ ions (4d10) trap holes and two distinct Ag2+ centers (4d9) are formed. These Ag2+ EPR spectra consist of doublets (i.e., the ...


Resonant Photoemission Of Rare Earth Doped Gan Thin Films, S. R. McHale, J. W. McClory, J. C. Petrosky, J. Wu, R. Palai, Yaroslav B. Losovyj, Peter A. Dowben 2011 Air Force Institute of Technology

Resonant Photoemission Of Rare Earth Doped Gan Thin Films, S. R. Mchale, J. W. Mcclory, J. C. Petrosky, J. Wu, R. Palai, Yaroslav B. Losovyj, Peter A. Dowben

Peter Dowben Publications

The 4d → 4f Fano resonances for various rare earth doped GaN thin films (RE = Gd, Er, Yb) were investigated using synchrotron photoemission spectroscopy. The resonant photoemission Fano profiles show that the major Gd and Er rare earth 4f weight is at about 5–6 eV below the valence band maximum, similar to the 4f weights in the valence band of many other rare earth doped semiconductors. For Yb, there is very little resonant enhancement of the valence band of Yb doped GaN, consistent with a largely 4f14 occupancy.


Schottky Barrier Formation At The Au To Rare Earth Doped Gan Thin Film Interface, S. R. McHale, J. W. McClory, J. C. Petrosky, J. Wu, R. Palai, Yaroslav B. Losovyj, Peter A. Dowben 2011 Air Force Institute of Technology

Schottky Barrier Formation At The Au To Rare Earth Doped Gan Thin Film Interface, S. R. Mchale, J. W. Mcclory, J. C. Petrosky, J. Wu, R. Palai, Yaroslav B. Losovyj, Peter A. Dowben

Peter Dowben Publications

The Schottky barriers formed at the interface between gold and various rare earth doped GaN thin films (RE = Yb, Er, Gd) were investigated in situ using synchrotron photoemission spectroscopy. The resultant Schottky barrier heights were measured as 1.68 ± 0.1 eV (Yb:GaN), 1.64 ± 0.1 eV (Er:GaN), and 1.33 ± 0.1 eV (Gd:GaN). We find compelling evidence that thin layers of gold do not wet and uniformly cover the GaN surface, even with rare earth doping of the GaN. Furthermore, the trend of the Schottky barrier heights follows the trend of the rare earth ...


Variation In Sclerotinia Sclerotiorum Bean Isolates From Multisite Resistance Screening Locations, Lindsey Otto-Hanson, James R, Steadman, Rebecca Higgins, Kent M. Eskridge 2011 Plant Pathology Department, University of Minnesota

Variation In Sclerotinia Sclerotiorum Bean Isolates From Multisite Resistance Screening Locations, Lindsey Otto-Hanson, James R, Steadman, Rebecca Higgins, Kent M. Eskridge

Faculty Publications, Department of Statistics

There is no complete resistance to Sclerotinia sclerotiorum, cause of white mold in dry bean (Phaseolus vulgaris). Variable resistance expression is one problem in screening for improved white mold resistance. With no previous information in the literature, pathogen variation in multisite screening nurseries was evaluated as one cause of diverse resistance expression. In all, 10 isolates of S. sclerotiorum used in greenhouse screening and 146 isolates collected from nine white mold field screening nurseries in major bean production areas in the United States were compared using mycelial compatibility groupings (MCGs) and an aggressiveness test. These 10 greenhouse screening isolates formed ...


Development Of An Internet Based System For Modeling Biotin Metabolism Using Bayesian Networks, Jinglei Zhou, Dong Wang, Vicki L. Schlegel, Janos Zempleni 2011 University of Nebraska - Lincoln

Development Of An Internet Based System For Modeling Biotin Metabolism Using Bayesian Networks, Jinglei Zhou, Dong Wang, Vicki L. Schlegel, Janos Zempleni

Faculty Publications, Department of Statistics

Biotin is an essential water-soluble vitamin crucial for maintaining normal body functions. The importance of biotin for human health has been under-appreciated but there is plenty of opportunity for future research with great importance for human health. Currently, carrying out predictions of biotin metabolism involves tedious manual manipulations. In this paper, we report the development of BiotinNet, an internet based program that uses Bayesian networks to integrate published data on various aspects of biotin metabolism. Users can provide a combination of values on the levels of biotin related metabolites to obtain the predictions on other metabolites that are not specified ...


Population Structure Of Melon-Headed Whales (Peponocephala Electra) In The Hawaiian Archipelago: Evidence Of Multiple Populations Based On Photo Identification, Jessica M. Aschettino, Robin W. Baird, Daniel J. McSweeney, Daniel L. Webster, Gregory S. Schorr, Jessica L. Huggins, Karen K. Martin, Sabre D. Mahaffy, Kristi L. West 2011 Hawaii Pacific University

Population Structure Of Melon-Headed Whales (Peponocephala Electra) In The Hawaiian Archipelago: Evidence Of Multiple Populations Based On Photo Identification, Jessica M. Aschettino, Robin W. Baird, Daniel J. Mcsweeney, Daniel L. Webster, Gregory S. Schorr, Jessica L. Huggins, Karen K. Martin, Sabre D. Mahaffy, Kristi L. West

Publications, Agencies and Staff of the U.S. Department of Commerce

Despite the presence of melon-headed whales in tropical and subtropical waters worldwide, little is known about this species. To assess population structure in Hawai‘i, dedicated field efforts were undertaken from 2000 to 2009. Using only good quality photographs, there were 1,433 unique photo-identified individuals, of which 1,046 were distinctive. Of these, 31.5% were seen more than once. Resighting data combined with social network analyses showed evidence of two populations—a smaller, resident population, seen exclusively off the northwest region of the island of Hawai‘i, and a larger population, seen throughout all the main Hawaiian Islands ...


Explaining Spatial Variability In Stream Habitats Using Both Natural And Management-Influenced Landscape Predictors, K. J. Anlauf, D. W. Jensen, K. M. Burnett, E. A. Steel, K. Christiansen, J. C. Firman, B. E. Feist, D. P. Larsen 2011 Oregon Department of Fish and Wildlife

Explaining Spatial Variability In Stream Habitats Using Both Natural And Management-Influenced Landscape Predictors, K. J. Anlauf, D. W. Jensen, K. M. Burnett, E. A. Steel, K. Christiansen, J. C. Firman, B. E. Feist, D. P. Larsen

Publications, Agencies and Staff of the U.S. Department of Commerce

1. The distribution and composition of in-stream habitats are reflections of landscape scale geomorphic and climatic controls. Correspondingly, Pacific salmon (Oncorhynchus spp.) are largely adapted to and constrained by the quality and complexity of those in-stream habitat conditions. The degree to which lands have been fragmented and managed can disrupt these patterns and affect overall habitat availability and quality.

2. Eleven in-stream habitat features were modelled as a function of landscape composition. In total, 121 stream reaches within coastal catchments of Oregon were modelled. For each habitat feature, three linear regression models were applied in sequence; final models were composed ...


Isolation And Transcriptome Analysis Of Adult Zebrafish Cells Enriched For Skeletal Muscle Progenitors, Matthew S. Alexander, Genri Kawahara, Alvin T. Kho, Melanie H. Howell, Timothy J. Pusack, Jennifer A. Myers, Federica Monanaro, Leonard I. Zon, Jeffrey R. Guyon, Louis M. Kunkel 2011 Howard Hughes Medical Institute

Isolation And Transcriptome Analysis Of Adult Zebrafish Cells Enriched For Skeletal Muscle Progenitors, Matthew S. Alexander, Genri Kawahara, Alvin T. Kho, Melanie H. Howell, Timothy J. Pusack, Jennifer A. Myers, Federica Monanaro, Leonard I. Zon, Jeffrey R. Guyon, Louis M. Kunkel

Publications, Agencies and Staff of the U.S. Department of Commerce

Introduction: Over the past 10 years, the use of zebrafish for scientific research in the area of muscle development has increased dramatically. Although several protocols exist for the isolation of adult myoblast progenitors from larger fish, no standardized protocol exists for the isolation of myogenic progenitors from adult zebrafish muscle.

Methods: Using a variant of a mammalian myoblast isolation protocol, zebrafish muscle progenitors have been isolated from the total dorsal myotome. These zebrafish myoblast progenitors can be cultured for several passages and then differentiated into multinucleated, mature myotubes.

Results: Transcriptome analysis of these cells during myogenic differentiation revealed a strong ...


Small-Scale Fisheries Of Peru: A Major Sink For Marine Turtles In The Pacific, Joanna Alfaro-Shigueto, Jeffrey C. Mangel, Francisco Bernedo, Peter H. Dutton, Jeffrey A. Seminoff, Brendan J. Godley 2011 University of Exeter

Small-Scale Fisheries Of Peru: A Major Sink For Marine Turtles In The Pacific, Joanna Alfaro-Shigueto, Jeffrey C. Mangel, Francisco Bernedo, Peter H. Dutton, Jeffrey A. Seminoff, Brendan J. Godley

Publications, Agencies and Staff of the U.S. Department of Commerce

1. Over the last few decades, evidence of marine vertebrate bycatch has been collected for a range of industrial fisheries. It has recently been acknowledged that large impacts may also result from similar interactions with small-scale fisheries (SSF) due largely to their diffuse effort and large number of vessels in operation. Marine mammals, seabirds, turtles as well as some shark species have been reported as being impacted by SSF worldwide.

2. From 2000 to 2007, we used both shore-based and onboard observer programmes from three SSF ports in Peru to assess the impact on marine turtles of small-scale longline, bottom ...


Seasonal And Interannual Effects Of Hypoxia On Fish Habitat Quality In Central Lake Erie, Kristin K. Arend, Dmitry Beletsky, Joseph DePinto, Stuart A. Ludsin, James J. Roberts, Daniel K. Rucinski, Donald Scavia, David J. Schwab, Tomas O. Höök 2011 Lake Superior State University

Seasonal And Interannual Effects Of Hypoxia On Fish Habitat Quality In Central Lake Erie, Kristin K. Arend, Dmitry Beletsky, Joseph Depinto, Stuart A. Ludsin, James J. Roberts, Daniel K. Rucinski, Donald Scavia, David J. Schwab, Tomas O. Höök

Publications, Agencies and Staff of the U.S. Department of Commerce

1. Hypoxia occurs seasonally in many stratified coastal marine and freshwater ecosystems when bottom dissolved oxygen (DO) concentrations are depleted below 2–3 mg O2 L-1.

2. We evaluated the effects of hypoxia on fish habitat quality in the central basin of Lake Erie from 1987 to 2005, using bioenergetic growth rate potential (GRP) as a proxy for habitat quality. We compared the effect of hypoxia on habitat quality of (i) rainbow smelt, Osmerus mordax mordax Mitchill (young-of-year, YOY, and adult), a cold-water planktivore, (ii) emerald shiner, Notropis atherinoides Rafinesque (adult), a warm-water planktivore, (iii) yellow perch, Perca ...


The Response Of Fish Larvae To Decadal Changes In Environmental Forcing Factors Off The Oregon Coast, Toby D. Auth, Richard D. Brodeur, Heather L. Soulen, Lorenzo Ciannelli, William T. Peterson 2011 Oregon State University

The Response Of Fish Larvae To Decadal Changes In Environmental Forcing Factors Off The Oregon Coast, Toby D. Auth, Richard D. Brodeur, Heather L. Soulen, Lorenzo Ciannelli, William T. Peterson

Publications, Agencies and Staff of the U.S. Department of Commerce

We conducted a statistical analysis to characterize the influence of large-scale and local environmental factors on presence-absence, concentration, and assemblage structure of larval fish within the northern California Current (NCC) ecosystem, based on samples collected at two nearshore stations along the Newport Hydrographic line off the central Oregon coast. Data from 1996 to 2005 were compared with historical data from the 1970s and 1980s to evaluate pseudo-decadal, annual, and seasonal variability. Our results indicate that the most abundant taxa from 1996 to 2005 differ from those of earlier decades. Concentrations of the dominant taxa and total larvae were generally greater ...


Movements Of Two Satellite-Tagged Pygmy Killer Whales (Feresa Attenuata) Off The Island Of Hawai‘I, Robin W. Baird, Gregory S. Schorr, Daniel L. Webster, Dan J. McSweeney, M. Bradley Hanson, Russel D. Andrews 2011 Cascadia Research Collective

Movements Of Two Satellite-Tagged Pygmy Killer Whales (Feresa Attenuata) Off The Island Of Hawai‘I, Robin W. Baird, Gregory S. Schorr, Daniel L. Webster, Dan J. Mcsweeney, M. Bradley Hanson, Russel D. Andrews

Publications, Agencies and Staff of the U.S. Department of Commerce

Pygmy killer whales (Feresa attenuata) are a rare tropical oceanic odontocete that are normally found close to shore only around oceanic islands (Donahue and Perryman 2009, McSweeney et al. 2009). In the Exclusive Economic Zone (EEZ) surrounding the Hawaiian Islands there is a single stock of pygmy killer whales recognized (Carretta et al. 2010). In the Hawaiian EEZ they are the third-least abundant of the 12 species of delphinids documented, with an estimated abundance of 956 individuals (CV = 0.83; Barlow 2006). Around the island of Hawai‘i a long-term photo-identification study has identified a small population that exhibits high ...


Dramatic Shifts In Hawaiian Monk Seal Distribution Predicted From Divergent Regional Trends, Jason D. Baker, Albert L. Harting, Tracy A. Wurth, Thea C. Johanos 2011 NOAA

Dramatic Shifts In Hawaiian Monk Seal Distribution Predicted From Divergent Regional Trends, Jason D. Baker, Albert L. Harting, Tracy A. Wurth, Thea C. Johanos

Publications, Agencies and Staff of the U.S. Department of Commerce

Total estimated abundance of Hawaiian monk seals was just 1,161 individuals in 2008 and this number is decreasing. Most monk seals reside in the remote Northwestern Hawaiian Islands (NWHI) where the decline is approximately 4%/yr, whereas relatively fewer seals currently occupy the main Hawaiian Islands (MHI). It is widely accepted that the MHI population is increasing, although there are no formal estimates of total abundance, population growth rate or vital rates. This lack of information has hampered efforts to anticipate future scenarios and plan conservation measures. We present the first estimates of MHI monk seal survival and age-specific ...


Humpback Whale Abundance In The North Pacific Estimated By Photographic Capture-Recapture With Bias Correction From Simulation Studies, Jay Barlow, John Calambokidis, Erin A. Falcone, C. Scott Baker, Alexander M. Burdin, Phillip J. Clapham, John K. B. Ford, Christine M. Gabriele, Richard LeDuc, David K. Mattila, Terrance J. Quinn II, Lorenzo Rojas-Bracho, Janice M. Straley, Barbara L. Taylor, Jorge Urbán R., Paul Wade, David Weller, Briana H. Witteveen, Manami Yamaguchi 2011 NOAA

Humpback Whale Abundance In The North Pacific Estimated By Photographic Capture-Recapture With Bias Correction From Simulation Studies, Jay Barlow, John Calambokidis, Erin A. Falcone, C. Scott Baker, Alexander M. Burdin, Phillip J. Clapham, John K. B. Ford, Christine M. Gabriele, Richard Leduc, David K. Mattila, Terrance J. Quinn Ii, Lorenzo Rojas-Bracho, Janice M. Straley, Barbara L. Taylor, Jorge Urbán R., Paul Wade, David Weller, Briana H. Witteveen, Manami Yamaguchi

Publications, Agencies and Staff of the U.S. Department of Commerce

We estimated the abundance of humpback whales in the North Pacific by capture recapture methods using over 18,000 fluke identification photographs collected in 2004–2006. Our best estimate of abundance was 21,808 (CV=0.04). We estimated the biases in this value using a simulation model. Births and deaths, which violate the assumption of a closed population, resulted in a bias of +5.2%, exclusion of calves in samples resulted in a bias of−10.5%, failure to achieve random geographic sampling resulted in a bias of −0.4%, and missed matches resulted in a bias of +9 ...


Satellite Cloud And Precipitation Assimilation At Operational Nwp Centres, Peter Bauer, Thomas Auligné, William Bell, Alan Geer, Vincent Guidard, Sylvain Heilliette, Masahiro Kazumori, Min-Jeong Kim, Emily H.-C. Liu, Anthony P. McNally, Bruce Macpherson, Kozo Okamoto, Richard Renshaw, Lars-Peter Riishøjgaard 2011 European Centre for Medium-Range Weather Forecasts

Satellite Cloud And Precipitation Assimilation At Operational Nwp Centres, Peter Bauer, Thomas Auligné, William Bell, Alan Geer, Vincent Guidard, Sylvain Heilliette, Masahiro Kazumori, Min-Jeong Kim, Emily H.-C. Liu, Anthony P. Mcnally, Bruce Macpherson, Kozo Okamoto, Richard Renshaw, Lars-Peter Riishøjgaard

Publications, Agencies and Staff of the U.S. Department of Commerce

The status of current efforts to assimilate cloud- and precipitation-affected satellite data is summarised with special focus on infrared and microwave radiance data obtained from operational Earth observation satellites. All global centres pursue efforts to enhance infrared radiance data usage due to the limited availability of temperature observations in cloudy regions where forecast skill is estimated to strongly depend on the initial conditions.Most systems focus on the sharpening of weighting functions at cloud top providing high vertical resolution temperature increments to the analysis, mainly in areas of persistent high and low cloud cover. Microwave radiance assimilation produces impact on ...


Multidecadal Otolith Growth Histories For Red And Gray Snapper (Lutjanus Spp.) In The Northern Gulf Of Mexico, Usa, Bryan A. Black, Robert J. Allman, Isaac D. Schroeder, Michael J. Schirripa 2011 Hatfield Marine Science Center

Multidecadal Otolith Growth Histories For Red And Gray Snapper (Lutjanus Spp.) In The Northern Gulf Of Mexico, Usa, Bryan A. Black, Robert J. Allman, Isaac D. Schroeder, Michael J. Schirripa

Publications, Agencies and Staff of the U.S. Department of Commerce

Dendrochronology (tree-ring analysis) techniques were applied to develop chronologies from the annual growth-increment widths of red snapper (Lutjanus campechanus) and gray snapper (Lutjanus griseus) otoliths sampled from the northern Gulf of Mexico, USA. Growth increment widths showed considerable synchrony within and across species, indicating that some component of environmental variability influenced growth. The final, exactly dated red snapper chronology continuously spanned 1975 through 2003, while the gray snapper chronology continuously spanned 1975 through 2006. To determine baseline climategrowth relationships, chronologies were compared to monthly averages of sea surface temperatures, U winds (west to east), V winds (south to north), and ...


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