2019
DOI: 10.1029/2018jc014805
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Variations in Rates of Biological Production in the Beaufort Gyre as the Arctic Changes: Rates From 2011 to 2016

Abstract: The Arctic Ocean is experiencing profound environmental changes as the climate warms. Understanding how these changes will affect Arctic biological productivity is key for predicting future Arctic ecosystems and the global CO2 balance. Here we use in situ gas measurements to quantify rates of gross oxygen production (GOP, total photosynthesis) and net community production (NCP, net CO2 drawdown by the biological pump) in the mixed layer in summer or fall from 2011 to 2016 in the Beaufort Gyre. NCP and GOP show… Show more

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Cited by 20 publications
(27 citation statements)
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“…When the ship crossed over the shelf break from the Chukchi Shelf into the basin, NCP decreased dramatically, by one to two orders of magnitudes to 0–2.5 mmol C m −2 d −1 . Our estimates of NCP in the basin agree well with observations (0.9–2.1 mmol C m −2 d −1 ) from discrete O 2 /Ar samples collected in this region in 2011–2016 (Ji et al., 2019) and with modeled NCP (0–3.5 mmol C m −2 d −1 ) (Islam et al., 2016). Similarly, the CO 2 flux results (‐1.6 to ‐2.2 mmol C m −2 d −1 ) are consistent with other observations in the Canada Basin (Evans et al., 2015; Islam et al., 2016).…”
Section: Resultssupporting
confidence: 88%
“…When the ship crossed over the shelf break from the Chukchi Shelf into the basin, NCP decreased dramatically, by one to two orders of magnitudes to 0–2.5 mmol C m −2 d −1 . Our estimates of NCP in the basin agree well with observations (0.9–2.1 mmol C m −2 d −1 ) from discrete O 2 /Ar samples collected in this region in 2011–2016 (Ji et al., 2019) and with modeled NCP (0–3.5 mmol C m −2 d −1 ) (Islam et al., 2016). Similarly, the CO 2 flux results (‐1.6 to ‐2.2 mmol C m −2 d −1 ) are consistent with other observations in the Canada Basin (Evans et al., 2015; Islam et al., 2016).…”
Section: Resultssupporting
confidence: 88%
“…Stronger stratification inhibits nutrients resupply from below and constrain primary production (Carmack et al, ) and causes a deepening in subsurface chlorophyll maximum in the Canada Basin (McLaughlin & Carmack, ). At the surface, however, increased biological production was observed with retreat of sea ice and increased stratification in the Canada Basin, especially in 2012, within observation period of 2011 and 2016 (Ji et al, ). This may be the reason of increased ΔDIC diseq after 2007.…”
Section: Resultsmentioning
confidence: 99%
“…There are almost no reports of NCP that overlap this region during winter and spring. NCP was 2–4 mmol• m −2 • day −1 in late summer 2015 when the mooring was recovered (Ji et al, ). The low salinity surface waters in the Canada Basin are generally without measurable nitrate during the summer (Brown et al, ).…”
Section: Resultsmentioning
confidence: 99%