Results 11 to 20 of about 152 (141)

Exploring biogeochemical and ecological redundancy in phytoplankton communities in the global ocean. [PDF]

Glob Chang Biol, 2021
Climate change induced alterations of oceanic conditions will lead to the ecological niches of some marine phytoplankton species disappearing, at least regionally. We use a computer model to explore phytoplankton ecological redundancy (i.e., will other species be able to fill the ecological roles of the extinct species) and biogeochemical redundancy (i.
Dutkiewicz S, Boyd PW, Riebesell U.
europepmc   +2 more sources

Multiple Dimensions Define Thresholds for Population Resilience of the Eastern Oyster, Crassostrea virginica. [PDF]

Ecol Evol
Thresholds or tipping points are generally defined as a point or a narrow transitional zone at which an organisms' abundance changes abruptly in response to relatively small changes in a driving force. Here, we use two statistical approaches to highlight different operational definitions of a threshold using the largely sessile marine invertebrate ...
La Peyre MK, Wang H, Sable SE, Wu W, Li B, Comba D, Perez C, Bates M, Swam LM.   +8 more
europepmc   +2 more sources

GODAE Systems in Operation [PDF]

Oceanography, 2009
During the last 15 years, operational oceanography systems have been developed in several countries around the world. These developments have been fostered primarily by the Global Ocean Data Assimilation Experiment (GODAE), which coordinated these ...
Eric Dombrowsky, Laurent Bertino, Gary B. Brassington, Eric P. Chassignet, Fraser Davidson, Harley E. Hurlburt, Masafumi Kamachi, Tong Lee, Matthew J. Martin, Shan Mey, Marina Tonani   +10 more
doaj   +5 more sources

Current state of the global operational aerosol multi-model ensemble: An update from the International Cooperative for Aerosol Prediction (ICAP). [PDF]

Q J R Meteorol Soc, 2019
International Cooperative for Aerosol Predictions (ICAP) model 550 nm total AOD RMSE of the 72 h forecast versus corresponding mean AODs for AERONET sites listed in Table 2. Large black dots are ICAP multi‐model ensemble consensus means. Individual models are in small coloured dots.
Xian P, Reid JS, Hyer EJ, Sampson CR, Rubin JI, Ades M, Asencio N, Basart S, Benedetti A, Bhattacharjee PS, Brooks ME, Colarco PR, da Silva AM, Eck TF, Guth J, Jorba O, Kouznetsov R, Kipling Z, Sofiev M, Perez Garcia-Pando C, Pradhan Y, Tanaka T, Wang J, Westphal DL, Yumimoto K, Zhang J.   +25 more
europepmc   +2 more sources

Ocean Data Assimilation Systems for GODAE [PDF]

Oceanography, 2009
Ocean data assimilation has reached a sufficient level of maturity such that observations are routinely combined with model forecasts to produce a variety of ocean products.
James Cummings, Laurent Bertino, Pierre Brasseur, Ichiro Fukumori, Masafumi Kamachi, Matthew Martin, Kristian Mogensen, Peter Oke, Charles Emmanuel Testut, Jacques Verron, Anthony Weaver   +10 more
doaj   +4 more sources

Validation and Intercomparison Studies Within GODAE [PDF]

Oceanography, 2009
During the Global Ocean Data Assimilation Experiment, seven international operational centers participated in a dedicated modeling system intercomparison exercise from February to April 2008.
Fabrice Hernandez, Laurent Bertino, Gary Brassington, Eric Chassignet, James Cummings, Fraser Davidson, Marie Drévillon, Gilles Garric, Masafumi Kamachi, Jean-Michel Lellouche, Ray Mahdon, Matthew J. Martin, Andry Ratsimandresy, Charly Regnier   +13 more
doaj   +4 more sources

Fast Spin‐Up of Geochemical Tracers in Ocean Circulation and Climate Models

Journal of Advances in Modeling Earth Systems, Volume 15, Issue 2, February 2023., 2023
Abstract Ocean geochemical tracers such as radiocarbon, protactinium and thorium isotopes, and noble gases are widely used to constrain a range of physical and biogeochemical processes in the ocean. However, their routine simulation in global ocean circulation and climate models is hindered by the computational expense of integrating them to a steady ...
Samar Khatiwala
wiley   +1 more source

Diel light cycles affect phytoplankton competition in the global ocean

Global Ecology and Biogeography, Volume 31, Issue 9, Page 1838-1849, September 2022., 2022
Abstract Aim Light, essential for photosynthesis, is present in two periodic cycles in nature: seasonal and diel. Although seasonality of light is typically resolved in ocean biogeochemical–ecosystem models because of its significance for seasonal succession and biogeography of phytoplankton, the diel light cycle is generally not resolved.
Ioannis Tsakalakis, Michael J. Follows, Stephanie Dutkiewicz, Christopher L. Follett, Joseph J. Vallino   +4 more
wiley   +1 more source

Modeling Photosynthesis and Exudation in Subtropical Oceans

Global Biogeochemical Cycles, Volume 35, Issue 9, September 2021., 2021
Abstract Marine phytoplankton contributes nearly half of the total primary production on Earth through photosynthesis. Parameterizations of algal photosynthesis commonly employed in global biogeochemical simulations generally fail to capture the observed vertical structure of primary production.
Zhen Wu, Stephanie Dutkiewicz, Oliver Jahn, Daniel Sher, Angelicque White, Michael J. Follows   +5 more
wiley   +1 more source

Assessing Eddying (1/12°) Ocean Reanalysis GLORYS12 Using the 14‐yr Instrumental Record From 59.5°N Section in the Atlantic

Journal of Geophysical Research: Oceans, Volume 126, Issue 6, June 2021., 2021
Abstract The eddy‐resolving (1/12°) global ocean reanalysis GLORYS12 is assessed against 14 years (2002–2015) of independent hydrographic observations collected at 59.5°N in the North Atlantic. Two multi‐observations statistical analyses, ISAS‐15 and ARMOR‐3D, and an eddy‐permitting (1/4°) reanalysis, GLORYS025, also contribute to this comparison.
Polina Verezemskaya, Bernard Barnier, Sergey K. Gulev, Sergey Gladyshev, Jean‐Marc Molines, Vsevolod Gladyshev, Jean‐Michel Lellouche, Alexander Gavrikov   +7 more
wiley   +1 more source