Relationships between continental Ice sheet retreat events recorded in the Arctic Ocean floor and their global climate changes

北冰洋海底记录的大陆冰盖退缩事件与其全球气候变化的关系

• 批准号: 23651021
• 负责人: UCHIDA Masao
• 金额: $ 2.5万
• 依托单位: National Institute for Environmental Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23651021/
• 关键词: 海洋古細菌; 代謝; 放射性炭素; 溶存有機炭素; 海洋微生物ループ; 古細菌; DOC; 炭素循環

Metabolism of marine archaea is well unknown, such as relative abundance of archaea with heterotrophic and autotrophic metabolisms. To elucidate the role in the carbon cycle, the GDGTs derived from membrane lipids of marine archaea were studied using natural level radiocarbon tracer, which samples was collected from a commercial deep water collection facility in Suruga bay. The carbon fixation rate was estimated by using in-situ incubation experiment and published values. The 48-54% of Crenarchaeota are estimated with autorophic metabolism and their carbon amount accumulation rate was from1.29Gt C/y to 6.29Gt C/y

海洋古菌的代谢尚不清楚，例如具有异养和自养代谢的古菌的相对丰度。为了阐明GDGT在碳循环中的作用，用天然水平的放射性碳示踪剂研究了海洋古生菌膜脂中的GDGT，这些样品来自苏鲁加湾的一个商业深水采集设施。用原位孵化实验和已发表的数值估算了固碳率。用自生代谢法估算了48%-54%的裸口藻类，其碳量积累速率为1.29Gt C/y~6.29Gt C/y

项目成果

Distribution and structure of pranktonic Archaea in the Arctic Ocean using 2008 – 2010 R/V Mirai cruise samples

使用 2008 – 2010 年 R/V Mirai 巡航样本研究北冰洋中的游动古细菌的分布和结构

• 发表时间: 2011
• 作者: Amano S. C.;Akiyama S.;Uchida M.;Utsumi M
• 通讯作者: Utsumi M

Sedimentary organic matter and carbonate variations in the Chukchi Borderland in association with ice sheet and ocean-atmosphere dynamics over the last 155 kyr

• DOI: 10.5194/bg-8-3545-2011
• 发表时间: 2011-12
• 期刊: Biogeosciences
• 影响因子: 4.9
• 作者: S. Rella;M. Uchida

Quick Recovery of Carbon Dioxide Exchanges in a Burned Black Spruce Forest in Interior Alaska

阿拉斯加内陆地区烧毁的黑云杉林中二氧化碳交换的快速恢复

• DOI: 10.2151/sola.2011-027
• 发表时间: 2011
• 期刊: SOLA
• 影响因子: 1.9
• 作者: Iwata H.;Uchida M.;他
• 通讯作者: 他

Source diagnosis of PAHs from Kolkata canal sediments

加尔各答运河沉积物中多环芳烃的来源诊断

• 发表时间: 2011
• 作者: Kumata H.;Uchida M.;Saha M.;Kondo M.;Shibata Y.;Takada H
• 通讯作者: Takada H

The trans-Arctic water 14C sections from Mirai and NABOS cruises: reconstruction of surface-mid-deepwater ventilation ages and their comparison of past 14C inventory data

Mirai 和 NABOS 巡航的跨北极水域 14C 剖面：表层-中深水通风年龄的重建及其与过去 14C 库存数据的比较

• 发表时间: 2011
• 作者: Uchida M.;Kumamoto Y.;Polyakov I;Utsumi M.;Kim Y.;Rozman P.;Murata M.;Shibata Y
• 通讯作者: Shibata Y