Development of palaeotemperature proxy using archaeal membrane lipids GDGTs and application for paleoclimate study

2014 Fiscal Year Final Research Report

• Project/Area Number: 25550020
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute for Environmental Studies
• Principal Investigator: UCHIDA masao 独立行政法人国立環境研究所, 環境計測研究センター, 主任研究員 (50344289)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 北極海 / 放射性炭素 / GDGT / 分子レベル放射性炭素分析 / 加速器質量分析計

Outline of Final Research Achievements

Recently TEX86 index, which is calculated from relative amounts of GDGTs compounds derived from membrane lipids of marine archaean cell, is used for reconstructing paleo temperature. However, the origin of GDGTs found in sediments is unknown. In this study, we reconstructed the TEX86 temperatures for surface sediments in Chukchi Sea, Arctic Ocean and examined the origins of GDGTs using compound-specific radiocarbon analysis.

Free Research Field

生物地球化学