Arid
DOI10.1029/2023GB008051
Overwinter and Spring Thaw Nitrous Oxide Fluxes in a Northern Prairie Cropland Are Limited but a Significant Proportion of Annual Emissions
Wagner-Riddle, Claudia; Congreves, Kate A.; Brown, Shannon E.; Helgason, Warren D.; Farrell, Richard E.
通讯作者Wagner-Riddle, C
来源期刊GLOBAL BIOGEOCHEMICAL CYCLES
ISSN0886-6236
EISSN1944-9224
出版年2024
卷号38期号:4
英文摘要Croplands that experience seasonal soil freezing and thawing have been shown to be significant sources of N2O emissions. Yet, there is a paucity of year-round N2O emission data for one of the most significant crop production regions that seasonally freeze, the Prairies. Here, we present micrometeorological N2O fluxes measured over 4 years in Saskatchewan, Canada, to evaluate the magnitude of freeze-thaw N2O emissions and investigate its driving factors. Significant thaw related emissions occurred in 2 of the 4 years and were associated with relatively higher fall nitrate levels and a more gradual soil thawing period. Overall, fall soil nitrate levels were a strong explanatory variable for the differences in non-growing season (NGS) N2O emission (r(2) = 0.485). Measured cumulative N2O emissions for the NGS were 123-938 g N ha(-1) and were much smaller than those obtained at other cold climate sites but amounted to 52% of annual totals on average. The November to April period contributed 30% of the annual total emissions in years without major thaw events, but 70% in years with significant thaws. NGS N2O emissions were not explained by cumulative freezing degree days unlike most other cold climate sites. We propose that NGS N2O emissions are more strongly influenced by thaw dynamics during freezing-thawing conditions in dry regions, whereas freezing intensity is the dominant factor for wetter regions. Our results indicate that even for a semi-arid region freeze-thaw is an important source of N2O emissions and must be considered for more accurate reporting and development of mitigation strategies.
英文关键词freeze-thaw cycles semi-arid climate nitrogen management micrometeorological measurements N2O budgets fall nitrate levels greenhouse gas emissions
类型Article
语种英语
开放获取类型hybrid
收录类别SCI-E
WOS记录号WOS:001191282100001
WOS关键词FREEZE ; SYSTEMS
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/403976
推荐引用方式
GB/T 7714
Wagner-Riddle, Claudia,Congreves, Kate A.,Brown, Shannon E.,et al. Overwinter and Spring Thaw Nitrous Oxide Fluxes in a Northern Prairie Cropland Are Limited but a Significant Proportion of Annual Emissions[J],2024,38(4).
APA Wagner-Riddle, Claudia,Congreves, Kate A.,Brown, Shannon E.,Helgason, Warren D.,&Farrell, Richard E..(2024).Overwinter and Spring Thaw Nitrous Oxide Fluxes in a Northern Prairie Cropland Are Limited but a Significant Proportion of Annual Emissions.GLOBAL BIOGEOCHEMICAL CYCLES,38(4).
MLA Wagner-Riddle, Claudia,et al."Overwinter and Spring Thaw Nitrous Oxide Fluxes in a Northern Prairie Cropland Are Limited but a Significant Proportion of Annual Emissions".GLOBAL BIOGEOCHEMICAL CYCLES 38.4(2024).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Wagner-Riddle, Claudia]的文章
[Congreves, Kate A.]的文章
[Brown, Shannon E.]的文章
百度学术
百度学术中相似的文章
[Wagner-Riddle, Claudia]的文章
[Congreves, Kate A.]的文章
[Brown, Shannon E.]的文章
必应学术
必应学术中相似的文章
[Wagner-Riddle, Claudia]的文章
[Congreves, Kate A.]的文章
[Brown, Shannon E.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。