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DOI | 10.1088/1748-9326/aa5ef5 |
Global negative emissions capacity of ocean macronutrient fertilization | |
Harrison, Daniel P.1,2 | |
2017-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | In order to meet the goal of limiting global average temperature increase to less than 2 degrees C, it is increasingly apparent that negative emissions technologies of up to 10 Pg C yr(-1) will be needed before the end of the century. Recent research indicates that fertilization of the ocean with the macronutrients nitrogen and phosphorus where they limit primary production, may have sequestration advantages over fertilizing iron limited regions. Utilizing global datasets of oceanographic field measurements, and output from a high resolution global circulation model, the current study provides the first comprehensive assessment of the global potential for carbon sequestration from ocean macronutrient fertilization (OMF). Sufficient excess phosphate exists outside the iron limited surface ocean to support once-off sequestration of up to 3.6 Pg C by fertilization with nitrogen. Ongoing maximum capacity of nitrogen only fertilization is estimated at 0.7 +/- 0.4 Pg C yr(-1) . Sequestration capacity is expected to decrease from the upper toward the lower bound over time under continued intense fertilization. If N and P were used in combination the capacity is ultimately limited by societies willingness to utilize phosphate resources. Doubling current phosphate production would allow an additional 0.9 Pg C yr(-1) and consume 0.07% yr(-1) of known global resources. Therefore offsetting up to around 15% (1.5 Pg C yr(-1)) of annual global CO2 emissions is assessed as being technically plausible. Environmental risks which to date have received little quantitative evaluation, could also limit the scale of implementation. These results reinforce the need to consider a multi-faceted approach to greenhouse gasses, including a reduction in emissions coupled with further research into negative emissions technologies. |
英文关键词 | ocean fertilization negative emissions carbon dioxide removal geoengineering ocean macronutrient fertilization carbon sequestration ocean biological carbon pump |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413801900001 |
WOS关键词 | ENVIRONMENTAL IMPACTS ; CARBON SEQUESTRATION ; IRON FERTILIZATION ; ATMOSPHERIC CO2 ; NITROGEN ; PHOSPHORUS ; EXPORT ; DEEP |
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/32063 |
专题 | 气候变化 |
作者单位 | 1.Univ Sydney, Sch Geosci, Fac Sci, Marine Studies Inst, F09, Sydney, NSW 2006, Australia; 2.Sydney Inst Marine Sci, 19 Chowder Bay Rd, Mosman, NSW 2088, Australia |
推荐引用方式 GB/T 7714 | Harrison, Daniel P.. Global negative emissions capacity of ocean macronutrient fertilization[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(3). |
APA | Harrison, Daniel P..(2017).Global negative emissions capacity of ocean macronutrient fertilization.ENVIRONMENTAL RESEARCH LETTERS,12(3). |
MLA | Harrison, Daniel P.."Global negative emissions capacity of ocean macronutrient fertilization".ENVIRONMENTAL RESEARCH LETTERS 12.3(2017). |
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