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  • 1
    Series available for loan
    Series available for loan
    Cardium Formation, Edson area, Alberta (1970)
    Ottawa : Geological Survey of Canada
    Associated volumes
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    Call number: SR 90.0008(68-30)
    In: Paper
    Type of Medium: Series available for loan
    Pages: IV, 62 S. + 2 pl.
    Series Statement: Paper / Geological Survey of Canada 68-30
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
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    Seasonal variation of surface and vertical profile of aerosol properties over a tropical urban station Hyderabad, India (2013)
    Wiley
    Details
    Publication Date: 2013-01-28
    Description: [1]  One year measurement of vertical profiles of volume backscatter and extinction coefficient, aerosol optical depth (AOD), mass concentration of black carbon (BC) and composite aerosol along with thermodynamic structure of the atmosphere has been carried out over an urban tropical location of Hyderabad(17.47°N, 78.58°E), India, during April 2009 to March 2010. The mean mixing layer height (MLH) exhibits large seasonality exceeding 4 km in pre-monsoon period whereas in winter it comes down to ~1.5 km with an annual mean value of 2.35 ± 1.02 km. Surface BC mass fraction (F BC ) shows marked seasonal variation from winter (13 ± 1.9%), pre-monsoon (8.19 ± 2.16%), monsoon (7.3 ± 1.8%) to post-monsoon (11.8 ± 0.18%). The profiles of volume backscatter and extinction coefficients reveal presence of elevated aerosol layers from 2 to 4 km and strong oscillations during pre-monsoon (March–May) and monsoon (June–September) seasons, respectively, while in post-monsoon (October–November) and winter (December–February), the aerosols are well within the lower boundary layer and also exhibit a drastic decrease with increasing altitude. These elevated aerosol layers and vertical distribution appear to be closely linked to the thermodynamic structure of the atmosphere. The aerosol optical properties in conjunction with air mass back trajectory analysis indicate that the observed elevated aerosol layers during pre-monsoon and monsoon could contain significant fraction of coarse mode particles with a mix of dust and marine aerosols. Further analysis reveals that the aerosols within atmospheric boundary layer (ABL) dominate the column aerosol loading with ABL-AOD contributing to ~77.7 ± 17.0%, with significant seasonal variation from winter (86.2 ± 13.1%), pre-monsoon (76.6 ± 12.8%), monsoon (54.2 ± 15.6%) to post monsoon (80.8 ± 14.8%). Seasonal variation of ABL-AOD and BC mass fraction follows similar pattern in the ABL indicating that BC may be an important contributor to the ABL aerosol loading.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 3
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    Linking the morphology of fluvial fan systems to aquifer stratigraphy in the Sutlej-Yamuna plain of northwest India (2016)
    Wiley
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    Publication Date: 2016-01-10
    Description: The Indo–Gangetic foreland basin has some of the highest rates of groundwater extraction in the world, focused in the states of Punjab and Haryana in northwest India. Any assessment of the effects of extraction on groundwater variation requires understanding of the geometry and sedimentary architecture of the alluvial aquifers, which in turn are set by their geomorphic and depositional setting. To assess the overall architecture of the aquifer system, we used satellite imagery and digital elevation models to map the geomorphology of the Sutlej and Yamuna fan systems, while aquifer geometry was assessed using 243 wells that extend to ∼200 m depth. Aquifers formed by sandy-channel bodies in the subsurface of the Sutlej and Yamuna fans have a median thickness of 7 and 6 m, respectively, and follow heavy-tailed thickness distributions. These distributions along with evidence of persistence in aquifer fractions as determined from compensation analysis, indicate persistent reoccupation of channel positions, and suggest that the major aquifers consist of stacked, multi-storied channel bodies. The percentage of aquifer material in individual boreholes decreases down-fan, although the exponent on the aquifer-body thickness distribution remains similar, indicating that the total number of aquifer bodies decrease down-fan but that individual bodies do not thin appreciably, particularly on the Yamuna fan. The interfan area and the fan-marginal zone have thinner aquifers and a lower proportion of aquifer material, even in proximal locations. We conclude that geomorphic setting provides a first-order control on the thickness, geometry, and stacking pattern of aquifer bodies across this critical region.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 4
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    Contrasting aerosol characteristics and radiative forcing over Hyderabad, India due to seasonal mesoscale and synoptic-scale processes (2012)
    Wiley
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    Publication Date: 2012-06-08
    Description: Regular measurements of spectral Aerosol Optical Depth (AOD) at ten wavelengths, obtained from multi-wavelength radiometer (MWR) under cloudless conditions in the outskirts of the tropical urban region of Hyderabad, India for the period January 2008 to December 2009, are examined. In general, high AOD with a coarse-mode abundance is seen during the pre-monsoon (March to May) and summer monsoon (June to September) with flat AOD spectra and low Ångström wavelength exponent ( α ), while in post-monsoon (October–November) and winter (December–February) seasons, fine-mode dominance and steep AOD spectra are the basic features. The aerosol columnar size distribution (CSD) retrieved from the spectral AOD using King's inversion showed bimodal size distributions for all the seasons, except for the monsoon, with an accumulation-mode radius at 0.12–0.25 µm and a coarse-mode one at 0.86–1.30 µm. On the other hand, the CSD during the monsoon follows the power law for fine mode and the unimodal distribution for coarse mode. The fine-mode aerosols during post-monsoon and winter appear to be associated with air masses from continental India, while the coarse-mode particles during pre-monsoon and monsoon with air masses originating from west Asia and western India. The single-scattering albedo (SSA) calculated using the OPAC model varied from 0.83 ± 0.05 in winter to 0.91 ± 0.01 during the monsoon, indicating significant absorption by aerosols due to larger black carbon mixing ratio in winter, whereas a significant contribution of sea-salt in the monsoon season leads to higher SSAs. Aerosol radiative forcing (ARF) calculated using SBDART shows pronounced monthly variability at the surface, top of atmosphere (TOA) and within the atmosphere due to large variations in AOD and SSA. In general, larger negative ARF values at the surface (−65 to −80 W m −2 ) and TOA (∼−17 W m −2 ) are observed during the pre-monsoon and early monsoon, while the atmospheric heating is higher (∼50–70 W m −2 ) during January-April resulting in heating rates of ∼1.6–2.0 K day −1 . Copyright © 2012 Royal Meteorological Society
    Print ISSN: 0035-9009
    Electronic ISSN: 1477-870X
    Topics: Geography , Physics
    Published by Wiley
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  • 5
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    Mass cytometry reveals systemic and local immune signatures that distinguish inflammatory bowel diseases (2019)
    Springer Nature
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    Publication Date: 2019
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 6
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    Finding regions of interest on toroidal meshes (2011)
    Institute of Physics Publishing (IOP)
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    Publication Date: 2011-03-06
    Description: Fusion promises to provide clean and safe energy, and a considerable amount of research effort is under way to turn this aspiration into a reality. This work focuses on a building block for analyzing data produced from the simulation of microturbulence in magnetic confinement fusion devices: the task of efficiently extracting regions of interest. Like many other simulations where a large number of data are produced, the careful study of 'interesting' parts of the data is critical to gain understanding. In this paper, we present an efficient approach for finding these regions of interest. Our approach takes full advantage of the underlying mesh structure in magnetic coordinates to produce a compact representation of the mesh points inside the regions and an efficient connected component labeling algorithm for constructing regions from points. This approach scales linearly with the surface area of the regions of interest instead of the volume as shown with both computational comple...
    Print ISSN: 1749-4699
    Electronic ISSN: 1749-4680
    Topics: Computer Science
    Published by Institute of Physics Publishing (IOP)
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  • 7
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    Seasonal and inter-annual variability of tropospheric ozone over an urban site in India: A study based on MOZAIC and CCM vertical profiles over Hyderabad (2014)
    Wiley
    Details
    Publication Date: 2014-03-13
    Description: This study is based on the analysis of Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) data measured over Hyderabad, India during the years 2006-2008. Tropospheric profiles of O 3 show clear seasonality with high and low values during the pre-monsoon and monsoon seasons, respectively. Analysis of back trajectory and fire count data indicates major roles for long-range transport and biomass burning in the seasonal variation of O 3 . Typically, lower levels of O 3 in the monsoon season were due to the flow of marine air and negligible regional biomass burning, while higher levels in other seasons were due to transport of continental air. In the upper troposphere, relatively low levels of O 3 during the monsoon and post-monsoon seasons were associated with deep convection. In the free troposphere, levels of O 3 also show year-to-year variability as the values in the pre-monsoon of 2006 were higher by about 30 ppbv compared to 2008. The year-to-year variations were mainly due to transition from El Niño (2006) to La Niña (2008). The higher and lower levels of O 3 were associated with strong and weak wind shears, respectively. Typically, vertical variations of O 3 were anti-correlated with the lapse rate profile. The lower O 3 levels were observed in the stable layers, but higher values in the mid-troposphere were caused by long-range transport. In the PBL region, the mixing ratio of O 3 shows strong dependencies on meteorological parameters. The Chemistry Climate Model (CCM2) reasonably reproduced the observed profiles of O 3 except for the pre-monsoon season.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 8
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    Selective transport in a microcompartment [Biochemistry] (2015)
    National Academy of Sciences
    Details
    Publication Date: 2015-03-11
    Description: Bacterial microcompartments are widespread prokaryotic organelles that have important and diverse roles ranging from carbon fixation to enteric pathogenesis. Current models for microcompartment function propose that their outer protein shell is selectively permeable to small molecules, but whether a protein shell can mediate selective permeability and how this occurs are...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    STOPPING THE CCR FLOW AND ITS ISOMETRIC COCYCLES (2014)
    Oxford University Press
    Details
    Publication Date: 2014-11-20
    Description: It is shown how to use non-commutative stopping times in order to stop the CCR flow of arbitrary index and also its isometric cocycles, i.e. left operator Markovian cocycles on Boson Fock space. Stopping the CCR flow yields a homomorphism from the semigroup of stopping times, equipped with the convolution product, into the semigroup of unital endomorphisms of the von Neumann algebra of bounded operators on the ambient Fock space. The operators produced by stopping cocycles themselves satisfy a cocycle relation.
    Print ISSN: 0033-5606
    Electronic ISSN: 1464-3847
    Topics: Mathematics
    Published by Oxford University Press
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  • 10
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    Homologies in leaf form inferred from KNOXI gene expression during development (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-06-08
    Description: KNOTTEDI-like homeobox (KNOXI) genes regulate development of the leaf from the shoot apical meristem (SAM) and may regulate leaf form. We examined KNOXI expression in SAMs of various vascular plants and found that KNOXI expression correlated with complex leaf primordia. However, complex primordia may mature into simple leaves. Therefore, not all simple leaves develop similarly, and final leaf morphology may not be an adequate predictor of homology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bharathan, Geeta -- Goliber, Thomas E -- Moore, Christopher -- Kessler, Sharon -- Pham, Thinh -- Sinha, Neelima R -- New York, N.Y. -- Science. 2002 Jun 7;296(5574):1858-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolution, State University of New York, Stony Brook, NY 11794-5245, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12052958" target="_blank"〉PubMed〈/a〉
    Keywords: Angiosperms/genetics/growth & development ; Biological Evolution ; Brassicaceae/*genetics/growth & development/metabolism ; Down-Regulation ; Gene Expression Regulation, Plant ; *Genes, Homeobox ; *Genes, Plant ; Gymnosperms/genetics/growth & development/metabolism ; Homeodomain Proteins/*genetics/metabolism ; Light ; Meristem/*genetics/metabolism ; Morphogenesis ; Phylogeny ; Plant Development ; Plant Leaves/*growth & development ; *Plant Proteins ; Plants/*genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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