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| Watanabe, Michio; Tatebe, Hiroaki; Koyama, Hiroshi; Hajima, Tomohiro; Watanabe, Masahiro; Kawamiya, Michio. |
| Based on a set of climate simulations utilizing two kinds of Earth system models (ESMs) in which observed ocean hydrographic data are assimilated using exactly the same data assimilation procedure, we have clarified that the successful simulation of the observed air-sea CO2 flux variations in the equatorial Pacific is tightly linked to the reproducibility of coupled physical air-sea processes. When an ESM with a weaker ENSO (El Nino-Southern Oscillations) amplitude than that of the observations was used for historical simulations with ocean data assimilation, the observed equatorial anticorrelated relationship between the sea surface temperature (SST) and the air-sea CO2 flux on interannual to decadal timescales could not be represented. The simulated CO2... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00668/78004/80257.pdf |
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| Hajima, Tomohiro; Watanabe, Michio; Yamamoto, Akitomo; Tatebe, Hiroaki; Noguchi, Maki A.; Abe, Manabu; Ohgaito, Rumi; Ito, Akinori; Yamazaki, Dai; Okajima, Hideki; Ito, Akihiko; Takata, Kumiko; Ogochi, Koji; Watanabe, Shingo; Kawamiya, Michio. |
| This article describes the new Earth system model (ESM), the Model for Interdisciplinary Research on Climate, Earth System version 2 for Long-term simulations (MIROC-ES2L), using a state-of-the-art climate model as the physical core. This model embeds a terrestrial biogeochemical component with explicit carbon-nitrogen interaction to account for soil nutrient control on plant growth and the land carbon sink. The model's ocean biogeochemical component is largely updated to simulate the biogeochemical cycles of carbon, nitrogen, phosphorus, iron, and oxygen such that oceanic primary productivity can be controlled by multiple nutrient limitations. The ocean nitrogen cycle is coupled with the land component via river discharge processes, and external inputs of... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00676/78839/81093.pdf |
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| 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... |
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Palavras-chave: Marine Biogeochemistry; CMIP5; CMIP6; Biogeochemistry-Climate Feedbacks; Model Performance. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00676/78827/81133.pdf |
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