RRC ID 70664
著者 Charles J. R. Williams, Daniel J. Lunt, Ulrich Salzmann, Tammo Reichgelt, Gordon N. Inglis, David R. Greenwood, Wing‐Le Chan, Ayako Abe‐Ouchi, Yannick Donnadieu, David K. Hutchinson, Agatha M. Boer, Jean‐Baptiste Ladant, Polina A. Morozova, Igor Niezgodzki, Gregor Knorr, Sebastian Steinig, Zhongshi Zhang, Jiang Zhu, Matthew Huber, Bette L. Otto‐Bliesner
タイトル African hydroclimate during the early Eocene from the DeepMIP simulations
ジャーナル Paleoceanography and Paleoclimatology
Abstract The early Eocene (∼56-48 million years ago) is characterised by high CO2 estimates (1200-2500 ppmv) and elevated global temperatures (∼10 to 16°C higher than modern). However, the response of the hydrological cycle during the early Eocene is poorly constrained, especially in regions with sparse data coverage (e.g. Africa). Here we present a study of African hydroclimate during the early Eocene, as simulated by an ensemble of state-of-the-art climate models in the Deep-time Model Intercomparison Project (DeepMIP). A comparison between the DeepMIP pre-industrial simulations and modern observations suggests that model biases are model- and geographically dependent, however these biases are reduced in the model ensemble mean. A comparison between the Eocene simulations and the pre-industrial suggests that there is no obvious wetting or drying trend as the CO2 increases. The results suggest that changes to the land sea mask (relative to modern) in the models may be responsible for the simulated increases in precipitation to the north of Eocene Africa. There is an increase in precipitation over equatorial and West Africa and associated drying over northern Africa as CO2 rises. There are also important dynamical changes, with evidence that anticyclonic low-level circulation is replaced by increased south-westerly flow at high CO2 levels. Lastly, a model-data comparison using newly-compiled quantitative climate estimates from palaeobotanical proxy data suggests a marginally better fit with the reconstructions at lower levels of CO2.
公開日 2022-5-9
DOI 10.1029/2022pa004419
リソース情報
GBIF Plant Specimen Database of Tama Forest Science Garden, Forestry and Forest Products Research Institute, Japan Plant specimens of Otaru Museum Plant specimens of Komatsu City Museum The 6-7th National Survey on the Natural Environment: Vegetation Survey Vascular Plant Specimens of Yamagata Prefectural Museum Vascular plant specimens of Omachi Alpine Museum Plant Specimens collections of the Kyushu University Museum Vascular Plants Collection of National Museum of Nature and Science Vascular plant specimens of Akita Prefectural Museum Herbarium, University Archives and Collections, Fukushima University, Japan (FKSE) Angiospermatatophytina Collection of Saitama Museum of Natural History Vascular plant specimens of Iida City Museum Plant specimens of Oiso Municipal Museum Vascular Plant Collection of Natural History Museum and Institute, Chiba Herbarium Specimens of Museum of Nature and Human Activities, Hyogo Pref., Japan Pteridophyta specimens of Iwate Prefectural Museum Fern (Pteridophyta) specimens of Toyama Science Museum Spermatophyta collection of Museum of Natural and Environmental History, Shizuoka Plant specimens of Ishikawa Museum of Natural History Ibaraki Nature Museum, Vascular Plants collection Plant Specimens of The Cattle Museum Vascular plant specimens of National Museum of Nature and Science (TNS) Long-term fauna and flora records of the experimental forests of the Forest Research Station of Hokkaido University, Japan Plant Specimens of Kurashiki Museum of Natural History Spermatophyte collection of Himeji City Science Museum Plant specimens of Toyota City Nature Sanctuary Herbarium Specimens of Tokushima Prefectural Museum, Japan Asia-Pacific Dataset Herbarium of Kitakyushu Museum of Natural History and Human History Plant Specimens of Lake Biwa Museum Spermatophyta specimens of Iwate Prefectural Museum Vascular Plants Collection of Sagamihara City Museum Plant specimens in the Museum of Nature and Human Activities, Hyogo Prefecture, Japan Plant specimens of Taga Town Museum, Shiga Pref., Japan Plant specimens deposited in Osaka Museum of Natural History, Japan Vascular Plant Specimens of Kochi Prefectural Makino Botanical Garden Plant Specimens of The Shimane Nature Museum of Mt. Sanbe Plant specimens of Kiritappu Wetland Center Vascular Plant Specimen database of Kanagawa Prefectural Museum of Natural History Gunma Museum of Natural History, Vascular Plant Specimen Vascular plants collection of Hiratsuka City Museum Plant specimens of Kushiro City Museum Herbarium Specimens of Bonin and Ryukyu Islands Vascular plant specimens of Sugadaira Research Station, Mountain Science Center, University of Tsukuba Occurrence data of woody plants in the Ginkakuzi-san National Forest Herbarium of Shinshu University Plant specimens of Parthenon Tama Museum (PTHM) Plant specimens of Obihiro Centennial City Museum Vascular plant specimens of Nagano Environmental Conservation Research Institute, Nagano Prefecture Plant Observation Records of Japan Tracheophyta collection of Biodiversity Center of Japan, Ministry of the Environment Vascular plant specimens of The Shirakami Research Center for Environmental Sciences, Hirosaki University Plant specimens of Toyota City Nature Sanctuary (from non-museum circle) Vascular plant specimens of Toyama Science Museum Plant specimens of Takatsuki Nature Museum (Aquapia Akutagawa)