Mooring Measurements of Anadyr Current Nitrate, Phosphate, and Silicate Enable Updated Bering Strait Nutrient Flux Estimates

被引：4

作者：

Hennon, Tyler D. ^{[1
]}

Danielson, Seth L. ^{[1
]}

Woodgate, Rebecca A. ^{[2
]}

Irving, Brita ^{[1
]}

Stockwell, Dean A. ^{[1
]}

Mordy, Calvin W. ^{[3
,4
]}

机构：

[1] Univ Alaska Fairbanks UAF, Coll Fisheries & Ocean Sci, Fairbanks, AK 99775 USA

[2] Univ Washington UW, Appl Phys Lab APL, Seattle, WA USA

[3] Univ Washington UW, Cooperat Inst Climate Ocean & Ecosyst Studies, Seattle, WA USA

[4] Natl Oceanog & Atmospher Adm NOAA, Pacific Marine Environm Lab PMEL, Seattle, WA USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 16期

关键词：

nutrient flux; Bering Strait; nutrient concentration; CHUKCHI SEAS; PACIFIC; SHELF;

D O I：

10.1029/2022GL098908

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In situ nutrient concentration data and salinity-nutrient parameterizations established at Anadyr Strait from June 2017 to June 2018 are used to estimate monthly Pacific-to-Arctic fluxes of nitrate, phosphate, and silicate through Bering Strait over 1997-2019. In most months our estimates rely on measurements made from mooring-based sensors and whole water samples, while over May-August the basis is shipboard hydrography. We find annually averaged Bering Strait fluxes of 16 +/- 6, 1.5 +/- 0.5, and 30 +/- 11 kmol/s for nitrate, phosphate, and silicate, respectively, with inter-annual variability +/- 30% of the mean. Maximum fluxes occur in April, exceeding the annual average by similar to 50%, while minimum fluxes occur in December. Annually averaged fluxes estimated here are similar to 50% higher than previous estimates. Significant (p < 0.05) increasing trends in phosphate and silicate fluxes are found over 1998-2018, but not nitrate. However, it is unclear if these trend results are due to differences in draw-down or limitations of the salinity-nutrient parameterizations.

引用

页数：9