scholarly journals Monsoon forcing, hydrodynamics of the Kuroshio Current, and tectonic effects on sedimentary carbon and sulfur cycling in the Okinawa Trough since 90 ka

2006 ◽  
Vol 33 (5) ◽  
Author(s):  
S. J. Kao ◽  
A. P. Roberts ◽  
S. C. Hsu ◽  
Y. P. Chang ◽  
W. B. Lyons ◽  
...  
Keyword(s):  
Okinawa Trough ◽  
Kuroshio Current ◽  
Sulfur Cycling ◽  
The Okinawa Trough ◽  
The Kuroshio ◽  
Sedimentary Carbon

A biomarker record of temperature and phytoplankton community structure in the Okinawa Trough since the last glacial maximum

2017 ◽  
Vol 88 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Jiaping Ruan ◽  
Yunping Xu ◽  
Su Ding ◽  
Yinghui Wang ◽  
Xinyu Zhang
Keyword(s):  
Phytoplankton Community ◽  
Okinawa Trough ◽  
Kuroshio Current ◽  
Community Change ◽  
Community Structures ◽  
Ocean Drilling Program ◽  
The Holocene ◽  
The Okinawa Trough ◽  
The Kuroshio ◽  
The Last Glacial

AbstractA variety of biomarkers were examined from Ocean Drilling Program Core 1202B to reconstruct temperature and phytoplankton community structures in the southern Okinawa Trough since 20 ka. Two molecular temperature proxies ( $${\rm U}_{{37}}^{{{\rm K}\prime}} $$ and TEX86) show 5°C to ~6°C warming during the glacial-interglacial transition. Prior to the Holocene, the $${\rm U}_{{37}}^{{{\rm K}\prime}} $$ -derived temperature was generally 1°C to 4°C higher than TEX86-derived temperature. This difference, however, was reduced to <1°C in the Holocene. Correspondingly, the phytoplankton biomarkers (e.g., C37:2 alkenone, brassicasterol, C30 1,15 diol, and dinosterol) indicate a shift of planktonic community structures, with coccolithophorids becoming more abundant in the Holocene at the expense of diatoms/dinoflagellates. This shift is related to the variability of nutrients, temperature, and salinity in the Okinawa Trough, likely controlled by the sea level and the intensity of the Kuroshio Current. The phytoplankton community change may have had profound implications for atmospheric CO2 fluctuations during glacial-interglacial cycles since diatoms and dinoflagellates have a higher efficiency of the biological pump than coccolithophorids.

Variation in subsurface water temperature and its link to the Kuroshio Current in the Okinawa Trough during the last 38.5 kyr

2017 ◽  
Vol 452 ◽  
pp. 1-11 ◽  
Author(s):  
Yoshimi Kubota ◽  
Nozomi Suzuki ◽  
Katsunori Kimoto ◽  
Masao Uchida ◽  
Takuya Itaki ◽  
...  
Keyword(s):  
Water Temperature ◽  
Okinawa Trough ◽  
Kuroshio Current ◽  
Subsurface Water ◽  
The Okinawa Trough ◽  
The Kuroshio

scholarly journals The Holocene Pulleniatina Minimum Event revisited: Geochemical and faunal evidence from the Okinawa Trough and upper reaches of the Kuroshio current

2006 ◽  
Vol 59 (3-4) ◽  
pp. 153-170 ◽  
Author(s):  
Yu-Shih Lin ◽  
Kuo-Yen Wei ◽  
In-Tian Lin ◽  
Pai-Sen Yu ◽  
Hong-Wei Chiang ◽  
...  
Keyword(s):  
Okinawa Trough ◽  
Kuroshio Current ◽  
The Holocene ◽  
The Okinawa Trough ◽  
The Kuroshio

Holocene variability of the Kuroshio Current in the Okinawa Trough, northwestern Pacific Ocean

2000 ◽  
Vol 184 (1) ◽  
pp. 305-319 ◽  
Author(s):  
Zhimin Jian ◽  
Pinxian Wang ◽  
Yoshiki Saito ◽  
Jiliang Wang ◽  
Uwe Pflaumann ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Okinawa Trough ◽  
Kuroshio Current ◽  
Northwestern Pacific ◽  
Northwestern Pacific Ocean ◽  
The Okinawa Trough ◽  
The Kuroshio

scholarly journals North Pacific-wide spreading of isotopically heavy nitrogen from intensified denitrification during the Bølling/Allerød and post-younger dryas periods: evidence from the Western Pacific

2008 ◽  
Vol 5 (2) ◽  
pp. 1017-1033 ◽  
Author(s):  
S. J. Kao ◽  
K. K. Liu ◽  
S. C. Hsu ◽  
Y. P. Chang ◽  
M. H. Dai
Keyword(s):  
North Pacific ◽  
Okinawa Trough ◽  
Younger Dryas ◽  
The Past ◽  
The Okinawa Trough ◽  
The Mean ◽  
The Kuroshio ◽  
Heavy Nitrogen ◽  
Critical Constraints ◽  
The Western Pacific

Abstract. Sedimentary δ15N record for the past 30 ka buried in the Okinawa Trough in the western North Pacific mimicking the pattern from the Eastern Tropical North Pacific (ETNP), but the values (4.4–5.8‰) and the amplitude of the variation were much smaller than those (9–17‰) of the previous site. All but three values in the record were lower than the mean δ15N (5.6‰) of nitrate in the upper 800 m of the Kuroshio water suggesting additional inputs of isotopically light nitrogen from N2-fixation. The peak values of δ15N occurred during the Bølling/Allerød period and the warming period right after the Younger Dryas, synchronous to those found in the Eastern North Pacific. It is highly probable the high δ15N values are originated from the influence of the intensified denitrification in the ETNP during the warming periods. These new data represent the sedimentary record most distant from the intensive denitrifying zone in the ETNP and may serve as critical constraints to better quantify the nitrogen budget in the last climate cycle.

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