Search Results - "SEKI, Osamu"

North Atlantic Holocene climate evolution recorded by high-resolution terrestrial and marine biomarker records by Moossen, Heiko, Bendle, James, Seki, Osamu, Quillmann, Ursula, Kawamura, Kimitaka

“…Holocene climatic change is driven by a plethora of forcing mechanisms acting on different time scales, including: insolation, internal ocean (e.g. Atlantic…”
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Increased interglacial atmospheric CO2 levels followed the mid-Pleistocene Transition by Yamamoto, Masanobu, Clemens, Steven C., Seki, Osamu, Tsuchiya, Yuko, Huang, Yongsong, O’ishi, Ryouta, Abe-Ouchi, Ayako

“…Atmospheric CO 2 and polar ice volume have been strongly coupled over the past 805,000 years. However, the prior extent of coupling, during times of…”
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Cellulose Oxygen Isotopes of Sphagnum and Vascular Plants in a Peat Core Reveal Climate Change in Northern Japan Over the Past 2,000 Years by Hiromichi Sakurai, Masanobu Yamamoto, Osamu Seki, Takayuki Omori, Tomonori Sato

“…Abstract The cellulose δ18O of plant tissues in peat is a potential climate proxy. However, understanding what is driving the shifts in δ18O of cellulose is…”
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Sources of atmospheric black carbon and related carbonaceous components at Rishiri Island, Japan: The roles of Siberian wildfires and of crop residue burning in China by Zhu, Chunmao, Kanaya, Yugo, Yoshikawa-Inoue, Hisayuki, Irino, Tomohisa, Seki, Osamu, Tohjima, Yasunori

“…A field study was conducted to clarify sources of atmospheric black carbon and related carbonaceous components at Rishiri Island, Japan. We quantified…”
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Dust correlation and oxygen isotope stratigraphy in the Southern Ocean over the last 450 kyrs: An Indian sector perspective by Matsui, Hiroki, Ikehara, Minoru, Suganuma, Yusuke, Seki, Osamu, Oyabu, Ikumi, Kawamura, Kenji

“…The chronology of Southern Ocean (SO) marine sediment cores forms the basis of understanding the SO paleoceanography, with significant implications for global…”
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Ancient marine sediment DNA reveals diatom transition in Antarctica by Armbrecht, Linda, Weber, Michael E., Raymo, Maureen E., Peck, Victoria L., Williams, Trevor, Warnock, Jonathan, Kato, Yuji, Hernández-Almeida, Iván, Hoem, Frida, Reilly, Brendan, Hemming, Sidney, Bailey, Ian, Martos, Yasmina M., Gutjahr, Marcus, Percuoco, Vincent, Allen, Claire, Brachfeld, Stefanie, Cardillo, Fabricio G., Du, Zhiheng, Fauth, Gerson, Fogwill, Chris, Garcia, Marga, Glüder, Anna, Guitard, Michelle, Hwang, Ji-Hwan, Iizuka, Mutsumi, Kenlee, Bridget, O’Connell, Suzanne, Pérez, Lara F., Ronge, Thomas A., Seki, Osamu, Tauxe, Lisa, Tripathi, Shubham, Zheng, Xufeng

“…Antarctica is one of the most vulnerable regions to climate change on Earth and studying the past and present responses of this polar marine ecosystem to…”
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Multiple episodes of ice loss from the Wilkes Subglacial Basin during the Last Interglacial by Iizuka, Mutsumi, Seki, Osamu, Wilson, David J., Suganuma, Yusuke, Horikawa, Keiji, van de Flierdt, Tina, Ikehara, Minoru, Itaki, Takuya, Irino, Tomohisa, Yamamoto, Masanobu, Hirabayashi, Motohiro, Matsuzaki, Hiroyuki, Sugisaki, Saiko

“…The Last Interglacial (LIG: 130,000–115,000 years ago) was a period of warmer global mean temperatures and higher and more variable sea levels than the…”
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Tropical Western Pacific Hydrology During the Last 6,000 Years Based on Wildfire Charcoal Records From Borneo by Yamamoto, Masanobu, Kikuchi, Takafumi, Sakurai, Hiromichi, Hayashi, Ryoma, Seki, Osamu, Omori, Takayuki, Sulaiman, Abdullah, Shaari, Hasrizal, Abdullah, Mohd Zulhilmy, Melling, Lulie

“…The forcing of multicentennial climate variability in the Western Pacific Warm Pool (WPWP) region is not fully understood. Here, we generated 6‐kyr‐long…”
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Pliocene cooling enhanced by flow of low-salinity Bering Sea water to the Arctic Ocean by Horikawa, Keiji, Martin, Ellen E., Basak, Chandranath, Onodera, Jonaotaro, Seki, Osamu, Sakamoto, Tatsuhiko, Ikehara, Minoru, Sakai, Saburo, Kawamura, Kimitaka

“…Warming of high northern latitudes in the Pliocene (5.33–2.58 Myr ago) has been linked to the closure of the Central American Seaway and intensification of…”
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Assessment for paleoclimatic utility of biomass burning tracers in SE-Dome ice core, Greenland by Parvin, Fahmida, Seki, Osamu, Fujita, Koji, Iizuka, Yoshinori, Matoba, Sumito, Ando, Takuto, Sawada, Ken

“…We provide continuous records of biomass burning molecular tracers (levoglucosan and dehydroabietic acid) in a Greenland ice core collected from the…”
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The significance of pyrogenic polycyclic aromatic hydrocarbons in Borneo peat core for the reconstruction of fire history by Kong, Sher-Rine, Yamamoto, Masanobu, Shaari, Hasrizal, Hayashi, Ryoma, Seki, Osamu, Mohd Tahir, Norhayati, Fadzil, Muhammad Fais, Sulaiman, Abdullah

“…The reconstruction of fire history is essential to understand the palaeoclimate and human history. Polycyclic aromatic hydrocarbons (PAHs) have been…”
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Novel alkenone-producing strains of genus Isochrysis (Haptophyta) isolated from Canadian saline lakes show temperature sensitivity of alkenones and alkenoates by Araie, Hiroya, Nakamura, Hideto, Toney, Jaime L., Haig, Heather A., Plancq, Julien, Shiratori, Takashi, Leavitt, Peter R., Seki, Osamu, Ishida, Ken-ichiro, Sawada, Ken, Suzuki, Iwane, Shiraiwa, Yoshihiro

“…[Display omitted] •Novel LCA-producing strains from Canadian lakes established as unialgal cultures.•Seven strains were categorized in the Isochrysis clade…”
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Early snowmelt by an extreme warming event affects understory more than overstory trees in Japanese temperate forests by Makoto, Kobayashi, Templer, Pamela H., Katayama, Ayumi, Seki, Osamu, Takagi, Kentaro

“…The occurrence of extreme warm events and early snowmelt is predicted to increase in high‐latitude ecosystems, even during periods of time when there is no…”
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Ice core records of levoglucosan and dehydroabietic and vanillic acids from Aurora Peak in Alaska since the 1660s: a proxy signal of biomass-burning activities in the North Pacific Rim by Pokhrel, Ambarish, Kawamura, Kimitaka, Kunwar, Bhagawati, Ono, Kaori, Tsushima, Akane, Seki, Osamu, Matoba, Sumio, Shiraiwa, Takayuki

“…A 180 m long (343 years) ice core was drilled in the saddle of Aurora Peak in Alaska (63.52∘ N, 146.54∘ W; elevation: 2825 m) and studied for biomass-burning…”
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Ice core profiles of saturated fatty acids (C12:0–C30:0) and oleic acid (C18:1) from southern Alaska since 1734 AD: A link to climate change in the Northern Hemisphere by Pokhrel, Ambarish, Kawamura, Kimitaka, Seki, Osamu, Matoba, Sumio, Shiraiwa, Takayuki

“…An ice core drilled at Aurora Peak in southeast Alaska was analyzed for homologous series of straight chain fatty acids (C12:0–C30:0) including unsaturated…”
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Long-range atmospheric transport of terrestrial biomarkers by the Asian winter monsoon: Evidence from fresh snow from Sapporo, northern Japan by Yamamoto, Shinya, Kawamura, Kimitaka, Seki, Osamu

“…Molecular distributions of terrestrial biomarkers were investigated in fresh snow samples from Sapporo, northern Japan, to better understand the long-range…”
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Genomic identification of the long-chain alkenone producer in freshwater Lake Toyoni, Japan: implications for temperature reconstructions by Plancq, Julien, McColl, Jill L., Bendle, James A., Seki, Osamu, Couto, Jillian M., Henderson, Andrew C.G., Yamashita, Youhei, Kawamura, Kimitaka, Toney, Jaime L.

“…•Genomic and LCA profile analyses to identify LCA-producers at Lake Toyoni, Japan.•Eighteen OTUs identified of which only one fell within the haptophyte…”
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Influence of Earlier Snowmelt on the Seedling Growth of Six Subboreal Tree Species in the Spring by Erica Marumo, Miki U. Ueda, Osamu Seki, Kentaro Takagi, Kobayashi Makoto

“…Climate warming is advancing snowmelt timing in the spring at high latitudes. To predict tree growth in subboreal forests under warmer climates based on…”
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Mid-Holocene Antarctic sea-ice increase driven by marine ice sheet retreat by Ashley, Kate E, McKay, Robert, Etourneau, Johan, Jimenez-Espejo, Francisco J, Condron, Alan, Albot, Anna, Crosta, Xavier, Riesselman, Christina, Seki, Osamu, Massé, Guillaume, Golledge, Nicholas R, Gasson, Edward, Lowry, Daniel P, Barrand, Nicholas E, Johnson, Katelyn, Bertler, Nancy, Escutia, Carlota, Dunbar, Robert, Bendle, James A

“…Over recent decades Antarctic sea-ice extent has increased, alongside widespread ice shelf thinning and freshening of waters along the Antarctic margin. In…”
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Ice-core records of biomass burning by Rubino, Mauro, D’Onofrio, Antonio, Seki, Osamu, Bendle, James A

“…We review the approaches for estimating biomass burning from ice-cores and consider the challenges and assumptions in their application. In particular, we…”
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