Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab2353 |
Marine N2O emissions during a Younger Dryas-like event: the role of meridional overturning, tropical thermocline ventilation, and biological productivity | |
Joos, Fortunat1,2; Battaglia, Gianna1,2; Fischer, Hubertus1,2; Jeltsch-Thommes, Aurich1,2; Schmitt, Jochen1,2 | |
2019-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland |
英文摘要 | Past variations in atmospheric nitrous oxide (N2O) allow important insight into abrupt climate events. Here, we investigate marine N2O emissions by forcing the Bern3D Earth System Model of Intermediate Complexity with freshwater into the North Atlantic. The model simulates a decrease in marine N2O emissions of about 0.8 TgN yr(-1) followed by a recovery, in reasonable agreement regarding timing and magnitude with isotope-based reconstructions of marine emissions for the Younger Dryas Northern Hemisphere cold event. In the model the freshwater forcing causes a transient near-collapse of the Atlantic Meridional Overturning Circulation (AMOC) leading to a fast adjustment in thermocline ventilation and an increase in O-2 in tropical eastern boundary systems and in the tropical Indian Ocean. In turn, net production by nitrification and denitrification and N2O emissions decrease in these regions. The decrease in organic matter export, mainly in the North Atlantic where ventilation and nutrient supply is suppressed, explains the remaining emission reduction. Modeled global marine N2O production and emission changes are delayed, initially by up to 300 years, relative to the AMOC decrease, but by less than 50 years at peak decline. The N2O perturbation is recovering only slowly and the lag between the recovery in AMOC and the recovery in N2O emissions and atmospheric concentrations exceeds 400 years. Thus, our results suggest a century-scale lag between ocean circulation and marine N2O emissions, and a tight coupling between changes in AMOC and tropical thermocline ventilation. |
英文关键词 | nitrous oxide Younger Dryas marine nitrous oxide emissions freshwater hosing experiment |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000474789100002 |
WOS关键词 | ATMOSPHERIC NITROUS-OXIDE ; ICE-CORE RECORDS ; CARBON-DIOXIDE ; OCEAN ; CYCLE ; REORGANIZATIONS ; CONSTRAINTS ; VARIABILITY ; CIRCULATION ; SENSITIVITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/184550 |
专题 | 气候变化 |
作者单位 | 1.Univ Bern, Phys Inst, Climate & Environm Phys, CH-3012 Bern, Switzerland; 2.Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland |
推荐引用方式 GB/T 7714 | Joos, Fortunat,Battaglia, Gianna,Fischer, Hubertus,et al. Marine N2O emissions during a Younger Dryas-like event: the role of meridional overturning, tropical thermocline ventilation, and biological productivity[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(7). |
APA | Joos, Fortunat,Battaglia, Gianna,Fischer, Hubertus,Jeltsch-Thommes, Aurich,&Schmitt, Jochen.(2019).Marine N2O emissions during a Younger Dryas-like event: the role of meridional overturning, tropical thermocline ventilation, and biological productivity.ENVIRONMENTAL RESEARCH LETTERS,14(7). |
MLA | Joos, Fortunat,et al."Marine N2O emissions during a Younger Dryas-like event: the role of meridional overturning, tropical thermocline ventilation, and biological productivity".ENVIRONMENTAL RESEARCH LETTERS 14.7(2019). |
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