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Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Seasonal Variations Of Co And Hcn In The Troposphere Measured By Solar Absorption Spectroscopy Over Poker Flat, Alaska, Y Kasai, A. Kagawa, Nicholas B. Jones, A. Fujiwara, K. Seki, Y. Murayama, F Murcray
Seasonal Variations Of Co And Hcn In The Troposphere Measured By Solar Absorption Spectroscopy Over Poker Flat, Alaska, Y Kasai, A. Kagawa, Nicholas B. Jones, A. Fujiwara, K. Seki, Y. Murayama, F Murcray
Faculty of Science - Papers (Archive)
Tropospheric partial column abundances of CO and HCN have been retrieved from infrared solar spectra observed with a ground-based spectrometer at Poker Flat Alaska (65°N, 147°W) over the time period from 2000 to 2004. From these data we report the transpacific transport induced inter-annual variability of tropospheric CO over Poker Flat. This is the first report of solar infrared data from the Poker Flat station, where the geographical location of the site means that remote sensing measurements are sampling the transport of transpacific air parcels going to Northern America from Eastern Siberia and Asia. The five year time-span of the …
Palaeovolcanic Forcing Of Short-Term Dendroisotopic Depletion: The Effect Of Decreased Solar Intensity On Irish Oak, N. Ogle, Christian Turney, R.M. Kalin, L. O'Donnell, C.J. Butler
Palaeovolcanic Forcing Of Short-Term Dendroisotopic Depletion: The Effect Of Decreased Solar Intensity On Irish Oak, N. Ogle, Christian Turney, R.M. Kalin, L. O'Donnell, C.J. Butler
Faculty of Science - Papers (Archive)
The climatic effects of historical volcanic eruptions are well documented in the literature. What are less certain however, are the effects of eruptions on more distant environments, particularly vegetation. Here we present sub-annual δ13C records from two high-resolution Irish oak (Quercus spp.) chronologies that span the Laki (Grímsvötn) 1783–84 and Tambora 1815 eruptions. In both instances, a significant depletion in δ13C is recorded within the trees following the eruption (∼1.8‰). Historical meteorological datasets from observatories near to the trees sampled demonstrate that the shifts in carbon isotopic content cannot be accounted for by changes in …
Combined Effects Of Solar Radiation And Desiccation On The Mortality And Development Of Encapsulated Embryos Of Rocky Shore Gastropods, R. Przeslawski
Combined Effects Of Solar Radiation And Desiccation On The Mortality And Development Of Encapsulated Embryos Of Rocky Shore Gastropods, R. Przeslawski
Faculty of Science - Papers (Archive)
Intertidal encapsulated embryos may be synchronously exposed to many environmental stressors, but interactions between some of these factors remain poorly understood. Here, the effects of solar radiation and desiccation on embryonic mortality and developmental rates were assessed using laboratory and field experiments. Egg masses of 3 intertidal gastropod species were exposed for 72 h to combinations of spectral (full spectrum, UV-blocked, dark) and daily emersion treatments (control, 15, 30, 60 min). Siphonaria denticulata and Bembicium nanum embryos were expected to be tolerant to emersion and UVR as they are routinely deposited on exposed rock platforms. In contrast, Dolabrifera brazieri embryos …
Shipborne Solar Absorption Measurements Of Co2, Ch4, N2o And Co And Comparison With Sciamachy Wfm-Doas Retrievals, T Warneke, R De Beek, M Buchwitz, J Notholt, A Schulz, Voltaire A. Velazco, O Schrems
Shipborne Solar Absorption Measurements Of Co2, Ch4, N2o And Co And Comparison With Sciamachy Wfm-Doas Retrievals, T Warneke, R De Beek, M Buchwitz, J Notholt, A Schulz, Voltaire A. Velazco, O Schrems
Faculty of Science - Papers (Archive)
CO, CH4, N2O and CO2 were retrieved from high resolution solar absorption spectra obtained during a ship cruise from Capetown to Bremerhaven in January/February 2003 by Fourier Transform Infrared (FTIR) spectroscopy. Precisions of better than 0.5% for the column averaged volume mixing ratios (VMR) of CH4 and CO2 are achieved using of O2 as a reference gas. Shipborne FTIR-measurements of CO and data from SCIAMACHY/ENVISAT retrieved by the Weighting Function Modified Differential Optical Absorption Spectroscopy (WFM-DOAS) retrieval algorithm show qualitatively the same latitudinal variations. WFMDOAS data of CH4, N2O and CO2 measured over sea exhibit a great spread. The spread …