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  • 2020-2024  (24)
  • 1975-1979  (10)
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  • 1
    Electronic Resource
    Electronic Resource
    Nuclear magnetic resonance investigation of the cytochrome oxidase-phospholipid interaction: a new model for boundary lipid (1979)
    s.l. : American Chemical Society
    Biochemistry 18 (1979), S. 3257-3267 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00582a010
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Spectroscopic studies of specifically deuterium labeled membrane systems. Nuclear magnetic resonance investigation of protein-lipid interactions in Escherichia coli membranes (1979)
    s.l. : American Chemical Society
    Biochemistry 18 (1979), S. 3268-3272 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00582a011
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    Paper (German National Licenses)
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  • 3
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    Elevation-dependent warming and associated topo-climate impacts on snow cover dynamics in the Indus-Ganges-Brahmaputra river basin (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-08-09
    Description: The Indus-Ganges-Brahmaputra river basins are characterized by rapid population growth and associated elevated resource demand, increased climatic variability and rapid cryospheric melting. This study investigates elevation-dependent, basin-wide, long-term (2003-2020) distributions and trends in precipitation, temperature and snow cover area (SCA) by employing several descriptive and non-parametric statistical applications using the Google Earth Engine and MATLAB programming language. Modified MODIS Terra and Aqua snow cover data with less than one percent cloud cover is used to estimate SCA along with CHIRPS (Precipitation) and MODIS LST. The importance of topographic factors in snow cover variation is demonstrated through the construction of a reflectance model using ASTER DEM and Landsat datasets. The study demonstrates statistically significant increasing annual, seasonal and monthly trends of precipitation in all eight elevation zones, while temperature and SCA exhibit strong variability. The three basin-wide investigations identifies that maximum annual increased precipitation (13.9mm/year) and decreased SCA (0.35Sq.km/year) observed in the Brahmaputra basin followed by Ganges and Indus, while seasonal fluctuations in temperature are apparent in an emerging pattern of warmer winter and a cooler pre-monsoon season. At higher elevations, SCA decreased markedly throughout the study period as higher temperatures induced rapid snow melting. Meanwhile, the correlation coefficient among rainfall, temperature and SCA highlights significant relationships between precipitation and SCA (R〈sup〉2〈/sup〉 =0.82), while SCA is inversely proportional to temperature (R〈sup〉2〈/sup〉 =0.89). The comprehensive elevation and three basin-wide analyses improve our understanding of the overall hydrological challenge and assist in the development of more reliable flood forecasting and water resource management.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 4
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    The simulation of distribution, transportation, and radiation effects of black carbon in the Arctic (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-06-01
    Description: Arctic temperature is raising at a rate of two to four times faster than the global average. The Arctic cryosphere has been undergoing rapid melting over the past few decades. Previous studies indicated that short-lived climate forcers (SLCFs) have substantial impacts on Arctic warming. Black carbon (BC) is one of the SLCFs, which can absorb solar radiation efficiently warming the atmosphere. The deposition of BC on snow and ice accelerates snow and ice melting by reducing surface albedo. In this study, we investigated the distribution, transportation, and radiation effects of BC in the Arctic from June 2015 to May 2017 by using the meteorology–chemistry model (Weather Research and Forecasting model couple with Chemistry, WRF-Chem). The results showed that near-surface BC concentrations in the Arctic presented higher values during winter-spring, which can be largely contributed by the stronger near-surface northward transport of aerosols from northern Eurasia during this period. The northward transport can be found in the higher troposphere during summer-autumn, while it was probably inefficient due to enhanced wet scavenging of aerosols. BC-induced near-surface temperature changes were stronger in the Arctic in winter and autumn, and the downward longwave radiation related to cloudiness changes played an important role for driving near-surface temperature. In summer and spring, the relatively less changes in near-surface temperature may be the result of the mutual offset between the surface longwave and shortwave radiation changes.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 5
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    Updated knowledge from Atmospheric Pollution and Cryospheric Change (APCC) program over the Third Pole Region (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-05-16
    Description: The Third Pole (TP) region has experienced rapid warming and cryospheric shrinkage, as well as significant atmospheric pollution intrusion from the surrounding heavy polluted regions. In order to investigate impacts of atmospheric pollution on cryospheric change, a coordinated monitoring network and research program on Atmospheric Pollution and Cryospheric Change (APCC) over the TP region has been continuously operated during the last decade. The monitoring network includes multidisciplinary observations for atmospheric aerosol, glaciers and snow cover. Based on the APCC program, new knowledge has been achieved. Atmospheric aerosols from South Asia can be transported across the Himalayas into the inland TP mainly in the troposphere via southwest winds during non-monsoon seasons. As an important light-absorbing impurity, BC in the glacier surface varies dramatically due to its enrichment during glacier melt. The large BC-in-snow radiative forcings and associated snow albedo feedback contribute to approximately 20% of the total glacier melt and a reduction in the duration of the snow cover by several days in the TP. Meanwhile, increasing BC aerosol over South Asia since 21〈sup〉st〈/sup〉 century causes a decrease in summer precipitation over the southern TP, indirectly resulting in 11.0% glacier deficit mass balance. Such changes will impact the water resource in downstream regions. Other pollutants, such as mercury, brown carbon and microplastics, and their potential impacts on cryospheric melt will be focused by the APCC program.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 6
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    Arctic sea-ice loss intensifies the aerosol transport to the Tibetan Plateau (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-03
    Description: The Tibetan Plateau (TP) has recently been polluted by strong anthropogenic emissions from South Asia. However, the mechanisms controlling the atmospheric circulations conducive to the aerosol transport to the TP are poorly understood. Here we show that winter loss of Arctic sea-ice over the sub-polar North Atlantic boosts the aerosol delivery toward the TP in April, when the aerosol loading is at its climatological maximum, preceding the Indian summer monsoon onset. Low sea-ice in February weakens the polar jet, which leads to the decreased Ural snowpack through a lessened transport of oceanic air. The decreased snowpack persisting to April reinforces the Ural pressure ridge and the East Asian trough, parts of a quasi-stationary Rossby wavetrain extending across Eurasia. These conditions facilitate the enhanced subtropical westerly jet at the southern edge of the TP, invigorating upslope wind combined with mesoscale updrafts wafting upstream emissions over the Himalayas onto the TP.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 7
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    Evolution of pole-to-pole teleconnection in zonal mean framework (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-06-08
    Description: A significant advancement in our understanding of the effects of extratropical climate on remote regions has been achieved through the flurry of evidence in paleoclimate proxies and model experiments. Although the theoretical framework provides valuable insight into understanding the tropical response to extratropical thermal forcing, it is mostly based on steady-state responses. This study examines the spatial and temporal evolution of pole-to-pole teleconnection by utilizing the benefits of an idealized general circulation model. The well-designed experiment reveals that tropical precipitation depends profoundly on the time scale of extratropical sources: unaltered by sufficiently high-frequency extratropical forcing. The extratropics-to-tropics teleconnection preferentially occurs through the lower tropospheric layer. Transient eddies to diffuse moist static energy perturb the midlatitude SSTs outside the forcing region. The transient eddies weaken in the subtropics and are transported further equatorward through the Hadley circulation. The crucial role of each dynamic process is well supported by theoretical models. Understanding these dynamics helps broaden the scope of extratropical thermal forcing to a pole-to-pole thermal connection. The mechanism and its implications provide a benchmark for the impact of extratropical climate change in realistic climate models.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 8
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    Development and applications of Climate Crisis Response System: focused on case study of Urban Assessment Model System in Gwangju, Korea (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-08-31
    Description: The Climate Crisis Response System (CCRS), developed by International Climate & Environment Center (ICEC), is consisted of Early Warning System (EWS), Urban Assessment Model System (UAMS), and Urban Carbon Management System (UCMS). In this study, the impacts of climate change on the Gwangju area were assessed using a UAMS, focusing on case studies on wind flow, heat waves, fine dusts, and so on. UAMS is a system in which Weather Research and Forecasting (WRF) and Computational Fluid Dynamic (CFD) models are coupled, enabling 48-hour forecast and detailed analysis of wind flow and fine dusts. Maximum spatial resolutions simulated by WRF and CFD are 11 m and 2-20 m, respectively. Global Forecast System (GFS) re-analysis dataset was used as input data, and downscaled by seven domains in WRF modeling. The performance of WRF model was then improved by applying Digital Elevation Models (DEM) and land cover map, based on Geographic Information System (GIS). In addition, the high resolution dataset can be available, using a WRF-LES (Large Eddy Simulation) mode. The verification was done with observation data. A 3-D simulation with OpenFOAM, using WRF modeling data, was performed to predict and evaluate wind flow, temperature distribution, and air pollutant dispersion in Gwangju area. Further, UAMS can be utilized to analyze the regional impacts of climate change, and to provide crucial information for decision-making in urban planning and climate/environment policies.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 9
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    Monte Carlo simulation of depth and lateral profiles of boron atoms implanted in polycrystalline silicon (1977)
    American Institute of Physics
    Details
    Publication Date: 1977-04-01
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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  • 10
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    Deuterium nuclear magnetic resonance investigation of the effects of proteins and polypeptides on hydrocarbon chain order in model membrane systems (1978)
    National Academy of Sciences
    Details
    Publication Date: 1978-10-01
    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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