Here, we report new estimates of local marine radiocarbon reservoir ages from northwestern Luzon Island in the Philippines, on the east side of the South China Sea. Data for two periods, through the 1940's and the mid Holocene, were derived from modem and fossil corals. Our results from Luzon Island show variable AR values, from -39 +/- 25 to 337 +/- 27 C-14 yr over the past 6000 years and highlight the importance of understanding temporal AR changes to obtain accurate radiocarbon dates for mid-Holocene samples. An abrupt shift in Delta R at similar to 5.5 ka BP, in the east side of the South China Sea, can be attributed to changes in the intensity of the up-welling, in the eastern Pacific, and to the East Asian Monsoon. Additional reservoir age data from the Pacific is likely to reveal details of oceanographic and climate changes at this time.
1.Univ Tokyo, Atmosphere & Ocean Res Inst, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778564, Japan 2.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan 3.Geol Survey Japan, Natl Inst Adv Ind Sci & Technol AIST, 1-1-1 Higashi, Tsukuba, Ibaraki 3058567, Japan 4.Australian Natl Univ, Res Sch Phys & Engn, Res Sch Earth Sci, Canberra, ACT 0200, Australia 5.Univ Philippines, Marine Sci Inst, Quezon City 1101, Philippines 6.Univ Hyogo, Inst Nat & Environm Sci, 6 Yayoigaoka, Sanda, Hyogo 6691546, Japan 7.Kyushu Univ, Fac Social & Cultural Studies, Dept Environm Changes, Nishi Ku, 744 Motooka, Fukuoka, Fukuoka 8190395, Japan
Recommended Citation:
Hirabayashi, Shoko,Yokoyama, Yusuke,Suzuki, Atsushi,et al. Local marine reservoir age variability at Luzon Strait in the South China Sea during the Holocene[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2019-01-01,455:171-177