Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Thomas J Ryan-Keogh"'
Autor:
William Moutier, Sandy J Thomalla, Stewart Bernard, Galina Wind, Thomas J Ryan-Keogh, Marié E Smith
Publikováno v:
Remote Sensing, Vol 11, Iss 15, p 1793 (2019)
The Southern Ocean (SO) is highly sensitive to climate change. Therefore, an accurate estimate of phytoplankton biomass is key to being able to predict the climate trajectory of the 21st century. In this study, MODerate resolution Imaging Spectroradi
Externí odkaz:
https://doaj.org/article/c5a641b7d57d4546aaa69e4b1296d852
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
Active chlorophyll-a fluorescence was measured during five summer research cruises (2008 – 2016), spanning the Atlantic sector of the Southern Ocean. This unique data set provides information for assessing zonal, inter-annual and intra-seasonal var
Externí odkaz:
https://doaj.org/article/5e51e0e0b53840c28e356da363b684b2
Publikováno v:
Frontiers in Marine Science, Vol 8 (2021)
The uptake and application of single turnover chlorophyll fluorometers to the study of phytoplankton ecosystem status and microbial functions has grown considerably in the last two decades. However, standardization of measurement protocols, processin
Externí odkaz:
https://doaj.org/article/ddebeb5604ad45f090f60e3d6a3f0696
Autor:
Nina Schuback, Philippe D. Tortell, Ilana Berman-Frank, Douglas A. Campbell, Aurea Ciotti, Emilie Courtecuisse, Zachary K. Erickson, Tetsuichi Fujiki, Kimberly Halsey, Anna E. Hickman, Yannick Huot, Maxime Y. Gorbunov, David J. Hughes, Zbigniew S. Kolber, C. Mark Moore, Kevin Oxborough, Ondřej Prášil, Charlotte M. Robinson, Thomas J. Ryan-Keogh, Greg Silsbe, Stefan Simis, David J. Suggett, Sandy Thomalla, Deepa R. Varkey
Publikováno v:
Frontiers in Marine Science, Vol 8 (2021)
Phytoplankton photosynthetic physiology can be investigated through single-turnover variable chlorophyll fluorescence (ST-ChlF) approaches, which carry unique potential to autonomously collect data at high spatial and temporal resolution. Over the pa
Externí odkaz:
https://doaj.org/article/75dcf97c81d64c7b98f8ae3e0360cdda
Publikováno v:
Science. 379:834-840
Southern Ocean primary productivity is principally controlled by adjustments in light and iron limitation, but the spatial and temporal determinants of iron availability, accessibility, and demand are poorly constrained, which hinders accurate long-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74481dc3750826af5f1a75b14b8a6fac
https://doi.org/10.1126/science.abl5237
https://doi.org/10.1126/science.abl5237
Autor:
Hanna M. Kauko, Philipp Assmy, Ilka Peeken, Magdalena Różańska-Pluta, Józef M. Wiktor, Gunnar Bratbak, Asmita Singh, Thomas J. Ryan-Keogh, Sebastien Moreau
Publikováno v:
Biogeosciences
We studied phytoplankton and protozooplankton community composition based on light microscopy, flow cytometry, and photosynthetic pigment data in the Atlantic sector of the Southern Ocean during March 2019 (early austral autumn). Sampling was focused
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb2b6d8148eac2e404b59faa746643e8
https://doi.org/10.5194/bg-19-5449-2022
https://doi.org/10.5194/bg-19-5449-2022
Autor:
Luke Gregor, Thomas J. Ryan-Keogh, Sarah-Anne Nicholson, Marcel du Plessis, Isabelle Giddy, Sebastiaan Swart
Publikováno v:
Frontiers in Marine Science, Vol 6 (2019)
Underwater gliders have become widely used in the last decade. This has led to a proliferation of data and the concomitant development of tools to process the data. These tools are focused primarily on converting the data from its raw form to more ac
Externí odkaz:
https://doaj.org/article/1817b76763134b939696e26afb7c0284
Autor:
Sandy J. Thomalla, Marcel Du Plessis, Nicolas Fauchereau, Isabelle Giddy, Luke Gregor, Stephanie Henson, Warren R. Joubert, Hazel Little, Pedro M. S. Monteiro, Thato Mtshali, Sarah Nicholson, Thomas J. Ryan-Keogh, Sebastiaan Swart
Quantifying the strength and efficiency of the Southern Ocean biological carbon pump (BCP) and its response to predicted changes in the Earth's climate is fundamental to our ability to predict long-term changes in the global carbon cycle and, by exte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f6872fe7aa33c629156dbb1b5130f09
Autor:
Asmita Singh, Susanne Fietz, Sandy J. Thomalla, Nicolas Sanchez, Murat V. Ardelan, Sébastien Moreau, Hanna M. Kauko, Agneta Fransson, Melissa Chierici, Saumik Samanta, Thato N. Mtshali, Alakendra N. Roychoudhury, Thomas J. Ryan-Keogh
The High Nutrient-Low Chlorophyll condition of the Southern Ocean is generally thought to be caused by the low bioavailability of micronutrients, particularly iron, which plays an integral role in phytoplankton photosynthesis. Nevertheless, the South
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14bab06d6d12cfed0920b8e2de9b73c9
https://doi.org/10.5194/bg-2022-245
https://doi.org/10.5194/bg-2022-245
Autor:
Thomas J. Ryan-Keogh, Alakendra N. Roychoudhury, Géraldine Sarthou, Natasha R. van Horsten, Thato N. Mtshali, Hélène Planquette, Eva Bucciarelli
Publikováno v:
Biogeosciences (1726-4170) (Copernicus GmbH), 2022-07, Vol. 19, N. 13, P. 3209-3224
The Southern Ocean is of global importance and processes such as mesopelagic remineralisation that impact the efficiency of the biological carbon pump in this region is of substantial interest. During this study the proxy barium excess which is utili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d200fab42b6f5cf90fac343b46c5ed9
https://archimer.ifremer.fr/doc/00683/79485/
https://archimer.ifremer.fr/doc/00683/79485/