[보고서]과거 단주기 돌발 기후변화 메커니즘 연구

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[국가R&D연구보고서] 과거 단주기 돌발 기후변화 메커니즘 연구
Mechanism of abrupt and millennial-scale climatic changes 원문보기

보고서 정보
주관연구기관	부산대학교 Busan National University
연구책임자	김부근
참여연구자	서유빈 , 정혜영 , 김영은 , 허진비
보고서유형	최종보고서
발행국가	대한민국
언어	한국어
발행년월	2012-01
과제시작연도	2011
주관부처	기상청
연구관리전문기관	기후과학연구관리단
등록번호	TRKO201200000819
과제고유번호	1365001119
DB 구축일자	2013-05-20
키워드	단주기,돌발 기후변화,고기후,베링해,동해millennial-scale,abrupt climate change,paleoclimate,Bering Sea,East Sea

초록 ▼

- 베링해 중층수 깊이의 북쪽 대륙사면에서 채취한 두 개의 코아 (PC23A, PC24A)에서 분석된 지화학 및 동위원소 지시자 (생규소 오팔, 탄산염, 유기탄소 및 퇴적유기물의 질소-탄소 동위원소)와 미화석 (방산충 및 유공충) 자료를 이용하여 지난 71,000년 동안의 천년 단위 고해양학 변화를 복원
- MIS 3과 4 동안 높은 탄산염 피크는 높은 생규소 오팔과 유기탄소 값과 함께 나타나며 Dansgaard-Oeschger (D-O) 사건들과 연결
- D-O 아간빙기 동안 베링해의 천년단위의 고해양학적 사건들은 중층수의 수직순환과 북태평양 중층수의 약화와 관련
- 동해 일본 분지의 북동쪽에서 채취된 두 개의 중력코아 (GH99-1239, GH99-1246)을 이용하여 천체 단위 및 천년 단위의 고해양학적 변화를 분석
- 지화학 자료는 천년 단위의 고해양학적 변화를 기록하고 빙하기-간빙기와 상관없이 Dansgaard-Oeschger 순환에 반응하는 TL 층들과 대응
- 천년 단위의 고기후학적 사건들에 의해 조절되는 동중국해 연안수의 유입 정도는 일본 분지의 북동쪽에 TL 층의 특성을 결정하는대 매우 중요한 요인

Abstract ▼

- To record the millennial-scale abrupt climatic change from the core sediments obtained from the East Asian marginal seas (Bering Sea, East Sea, East China Sea): age date of core sediments, geochemical/isotopic analysis, microfossil analysis
- To interpret the abrupt climatic change in the North

목차 Contents

표지 ... 1
제출문 ... 2
보고서 요약서 ... 3
요약문 ... 4
SUMMARY ... 6
CONTENTS ... 8
목차 ... 9
제1장 연구개발과제의 개요 ... 10
제2장 국내외 기술개발 현황 ... 12
제3장 연구개발수행 내용 및 결과 ... 14
제4장 목표달성도 및 관련분야에의 기여도 ... 75
제5장 연구개발결과의 활용계획 ... 84
제6장 연구개발과정에서 수집한 해외과학기술정보 ... 85
제7장 연구시설.장비 현황 ... 89
제8장 참고문헌 ... 92

표/그림 (23)

표 Schematic bathymetry of the Bering Sea. See sample sites of cores PC23A, PC24A, and PC25A. Arrows show the direction of major surface currents. BSC: Bering Slope Current, ANSC: Aleutian North Slope Current, KC: Kamchatka Current, AC: Anadyr Current, ACC: Alaska Coastal Current, KS: Kamchatka Strait, NS: Near Strait, BP: Buldir Pass, AP: Amutka Pass, UP: Unimak Pass. Dashed line represents seasonal sea ice cover for the glacial period (refer to Katsuki and Takahashi, 2005). Dark blue area represents the glacial ice sheet around the Bering Sea (Clark and Mix, 2002).
표 Information on sediment cores used in this study.
표 Correlations of sediment color values (L*: lightness, a*: psychometric red-green chromaticness, and b*: psychometric yellow-blue chromaticness) and lithologic features (laminated sediment layers during the last deglacial events and the MIS 4/3 boundary) among cores PC23A, PC24A, and PC25A.
표 List of AMS 14C ages from core PC24A. Two plankonic foraminiferal species (Neogloboquadrina pachyderma [N] and Globigerina bulloides [G]) were used for the 14C measurement. (unit is year)
표 Age models and lithoglogy of cores (a) PC23A and (b) PC24A. Open squares, open diamond, open circles, and open triangles represent AMS 14C dates using planktonic foraminifera, LAD of L. nipponica sakaii, age controls obtained from color correlations, and from lamination correlations with cores PC23A and PC25A, respectively.
표 Downcore profiles of (a) biogenic opal content, (b) CaCO3 content, (c) TOC content, (d) relative abundance of R. boreale, (e) total foraminifera (tests per gram), (f) planktonic foraminifera (tests per gram), relative abundance of (g) Oxic species, and (h) dysoxic species in core PC23A, and (i) Greenland ice core oxygen isotopes (GISP2, Grootes et al., 1993). Note Marine Isotope Stages on the top. EH: Early Holocene, YD: Younger Dryas, BA: Bølling-Allerød, D-O: Dansgaard-Oeschger interstadials. Shaded bars represent sediment laminations and dashed lines indicate warm interstadials. (a), (b), (c), and (d) are reported in Itaki et al. (2009).
표 Downcore profiles of (a) biogenic opal content, (b) CaCO3 content, (c) TOC content, (d) C/N ratio, (e) nitrogen and (f) carbon isotopes of sedimentary organic matters in core PC24A, and (g)Greenland ice core oxygen isotopes (GISP2, Grootes et al., 1993). Note Marine Isotope Stages on the top. YD: Younger Dryas, BA: Bølling-Allerød, D-O: Dansgaard-Oeschger interstadials. Shaded bars represent sediment laminations and dashed lines indicate warm interstadials. Red lines are downcore profiles of biogenic opal, CaCO3, and TOC contents of core PC23A (Itaki et al., 2009).
표 Paleoceanographic models of (a) the EH and BA, (b) the cold glacial period including the YD, and (c) D-O interstadial periods during MIS 3 and 4in the northern slope area of the Bering Sea. BSC; Bering Slope Current, POC: Particulate Organic Carbon
표 Schematic bathymetry of the Bering Sea, and locations of cores of the present and selected earlier studies. Arrows represent the direction of the major surface currents. ANSF Aleutian North Slope Current, AP Amutka Pass, BSC Bering Slope Current, UP Unimak Pass. Cores 1 PC23A (this study), 2 HLY02-02-3JPC (60°07.7N, 180°33.5E, 1,132 m, Cook et al., 2005), 3 UMK-3A (54°25.2N, 170°13.4E, 1,892 m, Okazaki et al., 2005), 4 BOW-9A (54°02.2N, 178°40.6E, 2,391 m, Okazaki et al., 2005), 5 JPC-17 (53°56.0’ N, 178°41.9E, 2,209 m, Brunelle et al., 2007), 6 GC-11 (53°31.0N, 178°51.0E, 3,600 m, Gorbarenko et al., 2005)
표 Dating of core PC23A based on 14 AMS 14Cages of planktonic foraminifers (left microphotograph) and the last appearance datum (LAD) of Lychnocanomma nipponica sakaii (right microphotograph) shown together with a lithologic columnar section (extracted from Itaki et al., 2009). Based on this combined age model, two main laminated layers can be correlated to the Pre-boreal (PB;ca.11.0– 12.0 cal. ka) for the upper unit, and to the Bølling-Allerød (BA; ca. 13.0– 15.0 cal. ka) for the lower unit, separated by the Younger Dryas (YD; ca. 12.0– 13.0 cal. ka).
표 Core 23A: downcore profiles of (a) opal content (dry wt% of bulk sediment), (b) TOC content, (c) CaCO3 content, (d) C/N ratio,(e) δ15N of bulk sediment, (f) δ13C of acidified bulk sediment, (g) Al concentration of bulk sediment, (h) Mo/Al ratio of bulk sediment, (i) Cd/Al ratio of the bulk sediment. Two main shaded intervals represent the laminated intervals corresponding to the Pre-boreal (PB)and Bølling-Allerød (BA) periods, between which the Younger Dryas (YD) occurs. Note the increasing TOC enrichment before the last deglaciation (arrow). Opal, TOC, and CaCO3 data were extracted from Itaki et al. (2009).
표 Comparison with earlier studies: downcore profiles of (a) δ18O of planktonic foraminifers (core HLY02-02-3JPC), (b) CaCO3 content (core BOW-9A), (c) abundance of planktonic foraminifers (core GC-11), (d) abundance of benthic foraminifers (core UMK-3A), (e) diatom-bound δ15Ndb values (core JPC-17). Two main shaded intervals correspond to the Pre-boreal (PB) and Bølling-Allerød (BA) periods. (for core data sources, see Fig. 1).
표 (a) Physiography of the Okhotsk Sea with schematic bathymetry. Sampling sites for core PC5B and core MD01-2415 (Nürnberg and Tiedemann, 2004) are indicated. (b) Schematic pattern of major surface currents in the Okhotsk Sea (modified after Gorbarenko et al., 2004). Arrows show the direction of major surface currents.
표 (a) Construction of age model of core PC5B with graphic correlation of b* values to the well-dated core MD01-2415 reported by Nürnberg and Tiedemann (2004) in addition to the calibration by SPECMAP. Dashed lines indicate corresponding points between the two cores using b* values. (b) Correlation of relative paleointensity variations between core PC05A plotted against depth and ODP Site 983 from the North Atlantic Ocean (Channell et al., 1998).
표 Downcore profiles of water content, biogenic opal content, and mass accumulation rate of biogenic opal during the last 550 kyrs. Note Marine Isotope Stages on the right. Shaded intervals represent interglacial stages, representing the enhanced surface-water productivity.
표 Spectral analyses of (a) b* values, (b) water content, and (c) biogenic opal content of core PC5B.
표 Different correlations between water content and opal content of core PC5B during the interglacial and glacial periods.
표 (a) Physiographic map and surface-water circulation of the East Sea/Japan Sea with the neighboring seas. Filled square represents the location of core MD01-2407. (b) Bathymetry of the northeastern Japan Basin with core locations.
표 (a) Chronostratigraphy of core GH99-1239 by means of correlation of TL layers with well-dated core GH99-1232 (modified from Itaki and Ikehara, 2003). Open circles represent AMS 14C dates of planktonic foraminifera and filled squares indicate the age of TL layers.Thin dashed lines represent MIS boundary. (b) Proposed chronostratigraphic framework of core GH99-1246 based on correlation of L* values and known tephra layers (thick dashed lines) with those of the well-dated core MD01-2407 (Kido et al., 2007) (modified after Khim et al., 2009).
표 Downcore variation of geochemical properties with lithology and chronostratigraphic framework of core GH99-1239. (a) Biogenic opal content, (b) TOC (total organic carbon)content, (c) CaCO3 content, (d) TS (total sulfur) content, (e) Mo concentration
표 Downcore variation of geochemical properties with lithology and chronostratigraphic framework of core GH99-1246. (a) Biogenic opal content, (b) TOC (total organic carbon) content, (c) CaCO3 content, (d) TS (total sulfur) content, (e) Mo concentration
표 Maximum TOC and TS contents and Mo concentration of TL layer in core GH99-1239.
표 Maximum TOC and TS contents and Mo concentration of TL layer in core GH99-1246.

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[국가R&D연구보고서] 과거 단주기 돌발 기후변화 메커니즘 연구
Mechanism of abrupt and millennial-scale climatic changes 원문보기