Consulta: creatorFacets:"Yool, Andrew"
Registros recuperados: 6
Data/hora: 11/06/2024 01:24:31

Challenges in integrative approaches to modelling the marine ecosystems of the North Atlantic: Physics to Fish and Coasts to Ocean
Provedor de dados: 5
Autores: Holt, Jason; Allen, J. Icarus; Anderson, Thomas R.; Brewin, Robert; Butenschoen, Momme; Harle, James; Huse, Geir; Lehodey, Patrick; Lindemann, Christian; Memery, Laurent; Salihoglu, Buis; Senina, Inna; Yool, Andrew.
It has long been recognised that there are strong interactions and feedbacks between climate, upper ocean biogeochemistry and marine food webs, and also that food web structure and phytoplankton community distribution are important determinants of variability in carbon production and export from the euphotic zone. Numerical models provide a vital tool to explore these interactions, given their capability to investigate multiple connected components of the system and the sensitivity to multiple drivers, including potential future conditions. A major driver for ecosystem model development is the demand for quantitative tools to support ecosystem-based management initiatives. The purpose of this paper is to review approaches to the modelling of marine...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00213/32434/30901.pdf

Resolving and Parameterising the Ocean Mesoscale in Earth System Models
Provedor de dados: 5
Autores: Hewitt, Helene T.; Roberts, Malcolm; Mathiot, Pierre; Biastoch, Arne; Blockley, Ed; Chassignet, Eric P.; Fox-kemper, Baylor; Hyder, Pat; Marshall, David P.; Popova, Ekaterina; Treguier, Anne-marie; Zanna, Laure; Yool, Andrew; Yu, Yongqiang; Beadling, Rebecca; Bell, Mike; Kuhlbrodt, Till; Arsouze, Thomas; Bellucci, Alessio; Castruccio, Fred; Gan, Bolan; Putrasahan, Dian; Roberts, Christopher D.; Van Roekel, Luke; Zhang, Qiuying.
Purpose of Review Assessment of the impact of ocean resolution in Earth System models on the mean state, variability, and future projections and discussion of prospects for improved parameterisations to represent the ocean mesoscale. Recent Findings The majority of centres participating in CMIP6 employ ocean components with resolutions of about 1 degree in their full Earth System models (eddy-parameterising models). In contrast, there are also models submitted to CMIP6 (both DECK and HighResMIP) that employ ocean components of approximately 1/4 degree and 1/10 degree (eddy-present and eddy-rich models). Evidence to date suggests that whether the ocean mesoscale is explicitly represented or parameterised affects not only the mean state of the ocean but also...
Tipo: Text
Palavras-chave: Ocean models; Resolution; Parameterisation; Mesoscale; Submesoscale.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76603/77753.pdf

A global perspective on the trophic geography of sharks
Provedor de dados: 5
Autores: Bird, Christopher S.; Verissimo, Ana; Magozzi, Sarah; Abrantes, Katya G.; Aguilar, Alex; Al-reasi, Hassan; Barnett, Adam; Bethea, Dana M.; Biais, Gerard; Borrell, Asuncion; Bouchoucha, Marc; Boyle, Mariah; Brooks, Edward J.; Brunnschweiler, Juerg; Bustamante, Paco; Carlisle, Aaron; Catarino, Diana; Caut, Stephane; Cherel, Yves; Chouvelon, Tiphaine; Churchill, Diana; Ciancio, Javier; Claes, Julien; Colaco, Ana; Courtney, Dean L.; Cresson, Pierre; Daly, Ryan; De Necker, Leigh; Endo, Tetsuya; Figueiredo, Ivone; Frisch, Ashley J.; Hansen, Joan Holst; Heithaus, Michael; Hussey, Nigel E.; Iitembu, Johannes; Juanes, Francis; Kinney, Michael J.; Kiszka, Jeremy J.; Klarian, Sebastian A.; Kopp, Dorothee; Leaf, Robert; Li, Yunkai; Lorrain, Anne; Madigan, Daniel J.; Maljkovic, Aleksandra; Malpica-cruz, Luis; Matich, Philip; Meekan, Mark G.; Menard, Frederic; Menezes, Gui M.; Munroe, Samantha E. M.; Newman, Michael C.; Papastamatiou, Yannis P.; Pethybridge, Heidi; Plumlee, Jeffrey D.; Polo-silva, Carlos; Quaeck-davies, Katie; Raoult, Vincent; Reum, Jonathan; Torres-rojas, Yassir Eden; Shiffman, David S.; Shipley, Oliver N.; Speed, Conrad W.; Staudinger, Michelle D.; Teffer, Amy K.; Tilley, Alexander; Valls, Maria; Vaudo, Jeremy J.; Wai, Tak-cheung; Wells, R. J. David; Wyatt, Alex S. J.; Yool, Andrew; Trueman, Clive N.
Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits in trophic interactions between sharks found in different habitats. We show that populations of shelf-dwelling sharks derive a substantial proportion of their carbon from regional pelagic sources, but contain individuals that forage within additional...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00420/53141/54249.pdf

Tracking Improvement in Simulated Marine Biogeochemistry Between CMIP5 and CMIP6
Provedor de dados: 5
Autores: Seferian, Roland; Berthet, Sarah; Yool, Andrew; Palmieri, Julien; Bopp, Laurent; Tagliabue, Alessandro; Kwiatkowski, Lester; Aumont, Olivier; Christian, James; Dunne, John; Gehlen, Marion; Ilyina, Tatiana; John, Jasmin G.; Li, Hongmei; Long, Matthew C; Luo, Jessica Y.; Nakano, Hideyuki; Romanou, Anastasia; Schwinger, Jorg; Stock, Charles; Santana-falcon, Yeray; Takano, Yohei; Tjiputra, Jerry; Tsujino, Hiroyuki; Watanabe, Michio; Wu, Tongwen; Wu, Fanghua; Yamamoto, Akitomo.
Purpose of Review The changes or updates in ocean biogeochemistry component have been mapped between CMIP5 and CMIP6 model versions, and an assessment made of how far these have led to improvements in the simulated mean state of marine biogeochemical models within the current generation of Earth system models (ESMs). Recent Findings The representation of marine biogeochemistry has progressed within the current generation of Earth system models. However, it remains difficult to identify which model updates are responsible for a given improvement. In addition, the full potential of marine biogeochemistry in terms of Earth system interactions and climate feedback remains poorly examined in the current generation of Earth system models. Increasing availability...
Tipo: Text
Palavras-chave: Marine Biogeochemistry; CMIP5; CMIP6; Biogeochemistry-Climate Feedbacks; Model Performance.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00676/78827/81133.pdf

On which timescales do gas transfer velocities control North Atlantic CO2 flux variability?
Provedor de dados: 5
Autores: Couldrey, Matthew P.; Oliver, Kevin I. C.; Yool, Andrew; Halloran, Paul R.; Achterberg, Eric P.
The North Atlantic is an important basin for the global ocean's uptake of anthropogenic and natural carbon dioxide (CO2), but the mechanisms controlling this carbon flux are not fully understood. The air-sea flux of CO2, F, is the product of a gas transfer velocity, k, the air-sea CO2 concentration gradient, Delta pCO(2), and the temperature-and salinity-dependent solubility coefficient, alpha, k is difficult to constrain, representing the dominant uncertainty in F on short (instantaneous to interannual) timescales. Previous work shows that in the North Atlantic, Delta pCO(2) and k both contribute significantly to interannual F variability but that k is unimportant for multidecadal variability. On some timescale between interannual and multidecadal, gas...
Tipo: Text
Palavras-chave: Carbon flux; Gas transfer velocity; Carbon cycle; Ocean model; Climate dynamics; Variability.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00383/49418/49868.pdf

Net primary productivity estimates and environmental variables in the Arctic Ocean: An assessment of coupled physical-biogeochemical models
Provedor de dados: 5
Autores: Lee, Younjoo J.; Matrai, Patricia A.; Friedrichs, Marjorie A. M.; Saba, Vincent S.; Aumont, Olivier; Babin, Marcel; Buitenhuis, Erik T.; Chevallier, Matthieu; De Mora, Lee; Dessert, Morgane; Dunne, John P.; Ellingsen, Ingrid H.; Feldman, Doron; Frouin, Robert; Gehlen, Marion; Gorgues, Thomas; Ilyina, Tatiana; Jin, Meibing; John, Jasmin G.; Lawrence, Jon; Manizza, Manfredi; Menkes, Christophe E.; Perruche, Coralie; Le Fouest, Vincent; Popova, Ekaterina E.; Romanou, Anastasia; Samuelsen, Annette; Schwinger, Jorg; Seferian, Roland; Stock, Charles A.; Tjiputra, Jerry; Tremblay, Bruno; Ueyoshi, Kyozo; Vichi, Marcello; Yool, Andrew; Zhang, Jinlun.
The relative skill of 21 regional and global biogeochemical models was assessed in terms of how well the models reproduced observed net primary productivity (NPP) and environmental variables such as nitrate concentration (NO3), mixed layer depth (MLD), euphotic layer depth (Z(eu)), and sea ice concentration, by comparing results against a newly updated, quality-controlled in situ NPP database for the Arctic Ocean (1959-2011). The models broadly captured the spatial features of integrated NPP (iNPP) on a pan-Arctic scale. Most models underestimated iNPP by varying degrees in spite of overestimating surface NO3, MLD, and Z(eu) throughout the regions. Among the models, iNPP exhibited little difference over sea ice condition (ice-free versus ice-influenced)...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00373/48441/69564.pdf