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  1. AU="Fishwick, James R"
  2. AU="Obrenović-Kirćanski Biljana"
  3. AU="Ch'oe, Ok-hyang"
  4. AU="Chiaverina, Giulia"
  5. AU="Saunders, Gary I"
  6. AU="Ng, Liqi"
  7. AU="Kato, Takeshi"
  8. AU="Dalstra, Michel"
  9. AU="Ruben, Jurjen"
  10. AU="Peersman, Nele"
  11. AU=Yip Christina Y C AU=Yip Christina Y C
  12. AU=Mehan Vivek K.
  13. AU="Nara, Akina"
  14. AU=Saccente Michael
  15. AU="Wang, Xiulu" AU="Wang, Xiulu"
  16. AU="Milnes, Di"
  17. AU=Almudhi Abdulaziz
  18. AU="Kumowski, Nina"
  19. AU="Dedeke, Iyabode"
  20. AU="Srivastava, Mitul"
  21. AU=Que Jian-Yu
  22. AU="Midulla, Martina"
  23. AU="et al"
  24. AU="Pritchard, Jonathan"
  25. AU="Memeo, Lorenzo"
  26. AU="Taylan, Gokay"
  27. AU="Tijssen, Robert J. W."
  28. AU="Silva, Marcelina Jasmine"
  29. AU="Egbuna, Chukwuebuka"

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  1. Buch ; Online: Insights from year-long measurements of air–water CH4 and CO2 exchange in a coastal environment

    Yang, Mingxi / Bell, Thomas G. / Brown, Ian J. / Fishwick, James R. / Kitidis, Vassilis / Nightingale, Philip D. / Rees, Andrew P. / Smyth, Timothy J.

    eISSN: 1726-4189

    2019  

    Abstract: Air–water CH 4 and CO 2 fluxes were directly measured using the eddy covariance technique at the Penlee Point Atmospheric Observatory on the southwest coast of the United Kingdom from September 2015 to August 2016. The high-frequency, year-long ... ...

    Abstract Air–water CH 4 and CO 2 fluxes were directly measured using the eddy covariance technique at the Penlee Point Atmospheric Observatory on the southwest coast of the United Kingdom from September 2015 to August 2016. The high-frequency, year-long measurements provide unprecedented detail on the variability of these greenhouse gas fluxes from seasonal to diurnal and to semi-diurnal (tidal) timescales. Depending on the wind sector, fluxes measured at this site are indicative of air–water exchange in coastal seas as well as in an outer estuary. For the open-water sector when winds were off the Atlantic Ocean, CH 4 flux was almost always positive (annual mean of ∼0.05 mmol m −2 d −1 ) except in December and January, when CH 4 flux was near zero. At times of high rainfall and river flow rate, CH 4 emission from the estuarine-influenced Plymouth Sound sector was several times higher than emission from the open-water sector. The implied CH 4 saturation (derived from the measured fluxes and a wind-speed-dependent gas transfer velocity parameterization) of over 1000 % in the Plymouth Sound is within range of in situ dissolved CH 4 measurements near the mouth of the river Tamar. CO 2 flux from the open-water sector was generally from sea to air in autumn and winter and from air to sea in late spring and summer, with an annual mean flux of near zero. A diurnal signal in CO 2 flux and implied partial pressure of CO 2 in water ( p CO 2 ) are clearly observed for the Plymouth Sound sector and also evident for the open-water sector during biologically productive periods. These observations suggest that coastal CO 2 efflux may be underestimated if sampling strategies are limited to daytime only. Combining the flux data with seawater p CO 2 measurements made in situ within the flux footprint allows us to estimate the CO 2 transfer velocity. The gas transfer velocity and wind speed relationship at this coastal location agrees reasonably well with previous open-water parameterizations in the mean but demonstrates considerable variability. We discuss the influences of biological productivity, bottom-driven turbulence and rainfall on coastal air–water gas exchange.
    Thema/Rubrik (Code) 333 ; 551
    Sprache Englisch
    Erscheinungsdatum 2019-03-13
    Erscheinungsland de
    Dokumenttyp Buch ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Buch ; Online: Temperature and salinity profiles at 10 m depth resolution from time series station E1 in the western English Channel from 1903 to 2010, supplementary data to: Smyth, Timothy J; Fishwick, James R; Al-Moosawi, Lisa; Cummings, Denise G; Harris, Carolyn; Kitidis, Vasillis; Rees, Andrew; Martinez-Vicente, Victor; Woodward, E Malcolm S (2010): A broad spatio-temporal view of the Western English Channel observatory. Journal of Plankton Research, 32(5), 585-601

    Smyth, Timothy J / Al-Moosawi, Lisa / Cummings, Denise G / Fishwick, James R / Harris, Carolyn / Kitidis, Vasillis / Martinez-Vicente, Victor / Rees, Andrew / Woodward, E Malcolm S

    2010  

    Abstract: The marine laboratories in Plymouth have sampled at two principle sites in the Western English Channel for over a century in open-shelf (station E1; 50? 02'N, 4? 22'W) and coastal (station L4; 50? 15'N, 4? 13'W) waters. These stations are seasonally ... ...

    Abstract The marine laboratories in Plymouth have sampled at two principle sites in the Western English Channel for over a century in open-shelf (station E1; 50? 02'N, 4? 22'W) and coastal (station L4; 50? 15'N, 4? 13'W) waters. These stations are seasonally stratified from late-April until September, and the variable biological response is regulated by subtle variations in temperature, light, nutrients and meteorology. Station L4 is characterized by summer nutrient depletion, although intense summer precipitation, increasing riverine input to the system, results in pulses of increased nitrate concentration and surface freshening. The winter nutrient concentrations at E1 are consistent with an open-shelf site. Both stations have a spring and autumn phytoplankton bloom; at station E1, the autumn bloom tends to dominate in terms of chlorophyll concentration. The last two decades have seen a warming of around 0.6?C per decade, and this is superimposed on several periods of warming and cooling over the past century. In general, over the Western English Channel domain, the end of the 20th century was around 0.5?C warmer than the first half of the century. The warming magnitude and trend is consistent with other stations across the north-west European Shelf and occurred during a period of reduced wind stress and increased levels of insolation (+20%); these are both correlated with the larger scale climatic forcing of the North Atlantic Oscillation.
    Sprache Englisch
    Erscheinungsverlauf 2010-9999
    Umfang Online-Ressource
    Verlag PANGAEA - Data Publisher for Earth & Environmental Science
    Erscheinungsort Bremen/Bremerhaven
    Dokumenttyp Buch ; Online
    Anmerkung This dataset is supplement to doi:10.1093/plankt/fbp128
    DOI 10.1594/PANGAEA.742659
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  3. Artikel: Seasonal dynamics of the carbonate system in the Western English Channel

    Kitidis, Vassilis / Hardman-Mountford, Nicholas J / Litt, Emmer / Brown, Ian / Cummings, Denise / Hartman, Sue / Hydes, David / Fishwick, James R / Harris, Carolyn / Martinez-Vicente, Victor / Woodward, E. Malcolm S / Smyth, Timothy J

    Continental shelf research. 2012 July 1, v. 42

    2012  

    Abstract: We present over 900 carbonate system observations collected over four years (2007–2010) in the Western English Channel (WEC). We determined CO₂ partial pressure (pCO₂), Total Alkalinity (TA) and Dissolved Inorganic Carbon (DIC) along a series of 40km ... ...

    Abstract We present over 900 carbonate system observations collected over four years (2007–2010) in the Western English Channel (WEC). We determined CO₂ partial pressure (pCO₂), Total Alkalinity (TA) and Dissolved Inorganic Carbon (DIC) along a series of 40km transects, including two oceanographic stations (L4 and E1) within a sustained coastal observatory. Our data follow a seasonal pattern of CO₂ undersaturation from January to August, followed by supersaturation in September–October and a return to near-equilibrium thereafter. This pattern is explained by the interplay of thermal and biological sinks in winter and spring–summer, respectively, followed by the breakdown of stratification and mixing with deeper, high-CO₂ water in autumn. The drawdown of DIC and inorganic N between March and June with a C:N ratio of 8.7–9.5 was consistent with carbon over-consumption during phytoplankton growth. Monthly mean surface pCO₂ was strongly correlated with depth integrated chlorophyll a highlighting the importance of subsurface chlorophyll a maxima in controlling C-fluxes in shelf seas. Mixing of seawater with riverine freshwater in near-shore samples caused a reduction in TA and the saturation state of calcite minerals, particularly in winter. Our data show that the L4 and E1 oceanographic stations were small, net sinks for atmospheric CO₂ over an annual cycle (−0.52±0.66molCm⁻²y⁻¹ and −0.62±0.49molCm⁻²y⁻¹, respectively).
    Schlagwörter alkalinity ; autumn ; calcite ; carbon ; carbon dioxide ; carbon nitrogen ratio ; chlorophyll ; drawdown ; freshwater ; mixing ; phytoplankton ; seasonal variation ; seawater ; winter ; English Channel
    Sprache Englisch
    Erscheinungsverlauf 2012-0701
    Umfang p. 30-40.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ISSN 0278-4343
    DOI 10.1016/j.csr.2012.04.012
    Datenquelle NAL Katalog (AGRICOLA)

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