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  • ARK-XXX/1.2; Autonomous underwater vehicle; AUV; AUV ID 038; AWI_PhyOce; CTD, Sea-Bird, SBE 19plus; DATE/TIME; DEPTH, water; Fluorescence; FRAM; FRontiers in Arctic marine Monitoring; Hausgarten; LATITUDE; LONGITUDE; Long-term Investigation at AWI-Hausgarten off Svalbard; MATLAB date; North Greenland Sea; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS99/075-1; PS99.2; Salinity; Temperature, water  (1)
  • ARK-XXX/1.2; Autonomous underwater vehicle; AUV; AUV ID 038; AWI_PhyOce; FRAM; FRontiers in Arctic marine Monitoring; Hausgarten; Long-term Investigation at AWI-Hausgarten off Svalbard; North Greenland Sea; Physical Oceanography @ AWI; Polarstern; PS99/075-1; PS99.2  (1)
  • Geophysics  (1)
  • Inorganic Chemistry  (1)
  • 2015-2019  (3)
  • 1965-1969  (1)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Photochemische Umwandlungen. Zur Photochemie des Cyclohexadiens-(1.3), III: Photoisomerisierung des Cyclohexadien-(1.3)-dicarbonsäure-(1.4)-dimethylesters zu Bicyclo[3.1.0]hexen-Derivaten (1965)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 98 (1965), S. 2201-2220 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cyclohexadien-(1.3)-dicarbonsäure-(1.4)-dimethylester wird photochemisch mit 60-70% Ausbeute zum Bicyclo[3.1.0]hexen-(2)-dicarbonsäure-(1.5)-dimethylester (XV) isomerisiert. Durch Variation des Anregerlichtes sowie der Reaktionstemperatur lassen sich der offenkettige Hexatrien-(1.3.5)-dicarbonsäure-(2.5)-dimethylester (XXVII) sowie der mit XV isomere Bicyclus XXII als Zwischenprodukte nachweisen. Die Photoisomerisierungsstufen XIV → XXVII sowie XXII → XV sind bei vergleichsweise sehr niedrigen Aktivierungsenergien thermisch umkehrbar. Entgegen unseren früheren Angaben vermag Diazomethan die Valenzisomerisierung zum Bicyclo[2.2.0]hexen-Derivat XXIX nicht zu sensibilisieren.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19650980722
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    Paper (German National Licenses)
    Fulltext
  • 2
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    LandAtmosphere Feedbacks Exacerbate Concurrent Soil Drought and Atmospheric Aridity (2019)
    In:  Other Sources
    Details
    Publication Date: 2019-09-21
    Description: Compound extremes such as cooccurring soil drought (low soil moisture) and atmospheric aridity (high vapor pressure deficit) can be disastrous for natural and societal systems. Soil drought and atmospheric aridity are 2 main physiological stressors driving widespread vegetation mortality and reduced terrestrial carbon uptake. Here, we empirically demonstrate that strong negative coupling between soil moisture and vapor pressure deficit occurs globally, indicating high probability of cooccurring soil drought and atmospheric aridity. Using the Global Land Atmosphere Coupling Experiment (GLACE)-CMIP5 experiment, we further show that concurrent soil drought and atmospheric aridity are greatly exacerbated by land atmosphere feedbacks. The feedback of soil drought on the atmosphere is largely responsible for enabling atmospheric aridity extremes. In addition, the soil moistureprecipitation feedback acts to amplify precipitation and soil moisture deficits in most regions. CMIP5 models further show that the frequency of concurrent soil drought and atmospheric aridity enhanced by landatmosphere feedbacks is projected to increase in the 21st century. Importantly, land atmosphere feedbacks will greatly increase the intensity of both soil drought and atmospheric aridity beyond that expected from changes in mean climate alone.
    Keywords: Geophysics
    Type: GSFC-E-DAA-TN72966 , Proceedings of the National Academy of Sciences (ISSN 0027-8424) (e-ISSN 1091-6490); 116; 38; 18,848-18,853
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Autonomous underwater vehicle PAUL observations during POLARSTERN cruise PS99.2 (2018)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: AWI's autonomous underwater vehicle PAUL – Polar Autonomous Underwater Laboratory (AUV Bluefin 21) was deployed during R/V Polarstern cruise PS99.2 in central Fram Strait. The scientific payload included a pressure sensor (Paroscientific Inc.), a pumped CTD (SBE 49 FastCAT), a dissolved oxygen sensor (SBE 43), a nitrate sensor (SBE Deep SUNA), two fluorometers for chlorophyll a and colored dissolved organic matter (Turner Design C7-c and C7-u), an upward looking sensor for photosynthetically active radiation (PAR, Satlantic PAR-log-s), shear and temperature microstructure profiler (MSP) from Rockland Scientific Inc., and an 300 kHz RDI acoustic Doppler current profiler (AADCP, AUV based Acoustic Doppler Current Profiler). Additionally the vehicle carried a water sample collector to gather a maximum number of 22 samples with a volume of 220 ml each. The AUV conducted high resolution profiles between the surface and 50 m water depth. Between the profiles the AUV was diving along constant depth for a few hundred meters to allow for ADCP measurements of the water column above. A small CTD SBE 19plus was deployed manually from a Zodiac driving in parallel to the AUV track.
    Keywords: ARK-XXX/1.2; Autonomous underwater vehicle; AUV; AUV ID 038; AWI_PhyOce; FRAM; FRontiers in Arctic marine Monitoring; Hausgarten; Long-term Investigation at AWI-Hausgarten off Svalbard; North Greenland Sea; Physical Oceanography @ AWI; Polarstern; PS99/075-1; PS99.2
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 4
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    Physical oceanography measurements during POLARSTERN cruise PS99.2 measured from a Zodiac (2018)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: ARK-XXX/1.2; Autonomous underwater vehicle; AUV; AUV ID 038; AWI_PhyOce; CTD, Sea-Bird, SBE 19plus; DATE/TIME; DEPTH, water; Fluorescence; FRAM; FRontiers in Arctic marine Monitoring; Hausgarten; LATITUDE; LONGITUDE; Long-term Investigation at AWI-Hausgarten off Svalbard; MATLAB date; North Greenland Sea; Physical Oceanography @ AWI; Polarstern; Pressure, water; PS99/075-1; PS99.2; Salinity; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 3500 data points
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    DATA PANGAEA
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