Zobrazeno 1 - 10
of 244
pro vyhledávání: '"Seung-Il Nam"'
Autor:
Dahae Kim, Jung-Hyun Kim, Youngkyu Ahn, Kwangchul Jang, Ji Young Jung, Minji Bae, Seung-Il Nam
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract Svalbard fjords are recognized as hotspots for organic carbon (OC) burial and storage due to their high sedimentation rates, which effectively trap terrestrial sediments and inhibit extensive OC remineralization. In this study, we investigat
Externí odkaz:
https://doaj.org/article/e85d9f7327274111a15fd98982a06c80
Publikováno v:
Communications Earth & Environment, Vol 4, Iss 1, Pp 1-10 (2023)
Freshening and oxygen depletion of the polar deep waters of the Amerasian Basin during the last glacial periods probably resulted in significant carbon burial, according to geochemical analyses of inorganic authigenic carbonates in Arctic Ocean sedim
Externí odkaz:
https://doaj.org/article/765827cef98841a99dad17cdb1b671be
Autor:
Junjie Wu, Gesine Mollenhauer, Ruediger Stein, Peter Köhler, Jens Hefter, Kirsten Fahl, Hendrik Grotheer, Bingbing Wei, Seung-Il Nam
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-11 (2022)
Shrinking of the Laurentide Ice Sheet mobilized the underlying rock organic carbon. Together with permafrost carbon release, this may contribute 12 ppm to deglacial CO2 rise, underscoring the impact of cryospheric change on the carbon cycle.
Externí odkaz:
https://doaj.org/article/0005f7e788b54f9d841677317c2cd495
Autor:
Dukki Han, Tim Richter-Heitmann, Ji-Hoon Kim, Michael W. Friedrich, Xiuran Yin, Marcus Elvert, Jong-Sik Ryu, Kwangchul Jang, Seung-Il Nam
Publikováno v:
Frontiers in Microbiology, Vol 14 (2023)
The sea-level rise during the Holocene (11–0 ky BP) and its resulting sedimentation and biogeochemical processes may control microbial life in Arctic sediments. To gain further insight into this interaction, we investigated a sediment core (up to 1
Externí odkaz:
https://doaj.org/article/c0f46001de8e4ad0841c974fef43055c
Publikováno v:
Frontiers in Earth Science, Vol 11 (2023)
Externí odkaz:
https://doaj.org/article/b8544c1926a04588824a46aa743bc851
Autor:
Young Jin Joe, Kwangchul Jang, Matthias Forwick, Jan Sverre Laberg, Gee Soo Kong, Moo-Hee Kang, Seok-Hoon Yoon, Seung-Il Nam
Publikováno v:
Frontiers in Earth Science, Vol 10 (2022)
Geophysical and lithological data provide crucial information for the understanding of glacial history in Arctic Svalbard. In this study, we reconstructed the glacier-induced depositional environments of Little Storfjorden and its tributary, Hambergb
Externí odkaz:
https://doaj.org/article/3ca8ce24824247bdadd7be92d15abb27
Autor:
Junjie Wu, Ruediger Stein, Kirsten Fahl, Nicole Syring, Seung-Il Nam, Jens Hefter, Gesine Mollenhauer, Walter Geibert
Publikováno v:
Communications Earth & Environment, Vol 1, Iss 1, Pp 1-12 (2020)
The Beaufort Sea was nearly ice-free during the transition from the last deglacial to the Holocene, a period in which two episodes of high sediment flux suggest major glacial flood events, according to high-resolution multi-proxy biomarker records.
Externí odkaz:
https://doaj.org/article/c66faf270d504662ac499d59ed9b8cf8
Autor:
Ji‐Hoon Kim, Wei‐Li Hong, Marta E. Torres, Jong‐Sik Ryu, Moo‐Hee Kang, Dukki Han, Seung‐Il Nam, Jin Hur, Dong‐Chan Koh, Frank Niessen, Dong‐Hun Lee, Kwangchul Jang, James William Buchanan Rae, Meilian Chen
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 8, Pp n/a-n/a (2021)
Abstract The response of Arctic Ocean biogeochemistry to subsurface flow driven by permafrost thaw is poorly understood. We present dissolved chloride and water isotopic data from the Chukchi Sea Shelf sediments that reveal the presence of a meteoric
Externí odkaz:
https://doaj.org/article/6860096e25734091bd3e9a4064c7d606
Publikováno v:
Polar Research, Vol 38, Iss 0, Pp 1-14 (2019)
Multi-proxy analyses of two sediment cores from Dicksonfjorden were performed to reconstruct Holocene environmental conditions in this northern branch of Isfjorden, the largest fjord system in Svalbard. Factors affecting the depositional processes in
Externí odkaz:
https://doaj.org/article/bb33e2c412ff4b5fae1fdb2e9cfb9f78
Autor:
Keebeom Ko, Seong-Hwan Kim, Subin Park, Hwa Seung Han, Jae Kyun Lee, Jin Wook Cha, Sunghoon Hwang, Ki Young Choi, Yoon-Jae Song, Sang-Jip Nam, Jongheon Shin, Seung-Il Nam, Hak Cheol Kwon, Jin-Soo Park, Dong-Chan Oh
Publikováno v:
Marine Drugs, Vol 20, Iss 5, p 281 (2022)
Two new pyrrolosesquiterpenes, glaciapyrroles D (1) and E (2) were discovered along with the previously reported glaciapyrrole A (3) from Streptomyces sp. GGS53 strain isolated from deep-sea sediment. This study elucidated the planar structures of 1
Externí odkaz:
https://doaj.org/article/52d5d3c9c595443fa6327a77e983c2a8