Increased extreme precipitation challenges nitrogen load management to the Gulf of Mexico
Increased extreme precipitation challenges nitrogen load management to the Gulf of Mexico
复制标题
极端降水增加对墨西哥湾的氮负荷管理提出了挑战
DOI:
10.1038/s43247-020-00020-7
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发表时间:
2020
影响因子:
7.9
通讯作者:
Lohrenz, Steven E.
中科院分区:
文献类型:
--
作者:
Lu, Chaoqun;Zhang, Jien;Tian, Hanqin;Crumpton, William G.;Helmers, Mathew J.;Cai, Wei-Jun;Hopkinson, Charles S.;Lohrenz, Steven E.
Although the hypoxia formation in the Gulf of Mexico is predominantly driven by increased riverine nitrogen (N) export from the Mississippi-Atchafalaya River basin, it remains unclear how hydroclimate extremes affect downstream N loads. Using a process-based hydro-ecological model, we reveal that over 60% of the land area of the Basin has experienced increasing extreme precipitation since 2000, and this area yields over 80% of N leaching loss across the region. Despite occurring in ~9 days year−1, extreme precipitation events contribute ~1/3 of annual precipitation, and ~1/3 of total N yield on average. Both USGS monitoring and our modeling estimates demonstrate an approximately 30% higher annual N load in the years with extreme river flow than the long-term median. Our model suggests that N load could be reduced by up to 16% merely by modifying fertilizer application timing but increasing contribution of extreme precipitation is shown to diminish this potential.
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影响因子:
2.4
作者:
D. Robertson;D. Saad
通讯作者:
D. Robertson;D. Saad
影响因子:
6.3
作者:
Kelly, Sara A.;Takbiri, Zeinab;Foufoula-Georgiou, Efi
通讯作者:
Foufoula-Georgiou, Efi
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
A. VanLoocke;T. Twine;C. Kucharik;C. Bernacchi
通讯作者:
C. Bernacchi
DOI:
--
发表时间:
2017
影响因子:
11.1
作者:
D. Scavia;I. Bertani;D. Obenour;R. Turner;D. Forrest;A. Katin
通讯作者:
A. Katin
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
A. Bratkovich;S. Dinnel;D. Goolsby
通讯作者:
D. Goolsby