Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Hansell A"'
Autor:
Baylie A. Fadool, Kylie G. Bostick, Lauran R. Brewster, Alexander C. Hansell, John K. Carlson, Matthew J. Smukall
Publikováno v:
Frontiers in Marine Science, Vol 11 (2024)
Age and growth estimates are essential for life history modeling in elasmobranchs and are used to inform accurate conservation and management decisions. The nurse shark (Ginglymostoma cirratum) is abundant in coastal waters of the Atlantic Ocean, yet
Externí odkaz:
https://doaj.org/article/c9ae4d80d76949adb3fbb9a255d22150
Autor:
Chelsea N. Lopez, Dennis A. Hansell
Publikováno v:
Frontiers in Marine Science, Vol 10 (2023)
Here we shed light on two mechanisms that stimulate deep particle export via upper-ocean iron fertilization in the Southern Ocean: deep frontal mixing and melting of sea ice. We present data collected a decade apart in the Pacific sector of the South
Externí odkaz:
https://doaj.org/article/1b9d09eee5ff4aecac35680f5329b710
Autor:
Elisa Halewood, Keri Opalk, Lillian Custals, Maverick Carey, Dennis A. Hansell, Craig A. Carlson
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
This document describes best practices for analysis of dissolved organic matter (dissolved organic carbon and total dissolved nitrogen) in seawater samples. Included are SOPs for sample collection and storage, details for laboratory analysis using hi
Externí odkaz:
https://doaj.org/article/3087e15a7ad54c4e90b5ad38630d7f30
Publikováno v:
Frontiers in Marine Science, Vol 8 (2021)
Here we provide compelling evidence that deep particle export enhanced dissolved organic carbon (DOC) concentrations beneath the Pacific’s Subarctic Front (SA, ∼42°N) and Northern Subtropical Front (NST, ∼34°N). We report three main findings:
Externí odkaz:
https://doaj.org/article/fb7658435b384d88a5ef3d9f3197fa7f
Autor:
Federico Baltar, Xosé A. Alvarez-Salgado, Javier Arístegui, Ronald Benner, Dennis A. Hansell, Gerhard J. Herndl, Christian Lønborg
Publikováno v:
Frontiers in Marine Science, Vol 8 (2021)
About 20% of the organic carbon produced in the sunlit surface ocean is transported into the ocean’s interior as dissolved, suspended and sinking particles to be mineralized and sequestered as dissolved inorganic carbon (DIC), sedimentary particula
Externí odkaz:
https://doaj.org/article/4634f9e51f21484e90a4a7b29ed23340
Autor:
Brandon M. Stephens, Keri Opalk, Daniel Petras, Shuting Liu, Jacqueline Comstock, Lihini I. Aluwihare, Dennis A. Hansell, Craig A. Carlson
Publikováno v:
Frontiers in Marine Science, Vol 7 (2020)
The bioavailability of organic matter (OM) to marine heterotrophic bacterioplankton is determined by both the chemical composition of OM and the microbial community composition. In the current study, changes in OM bioavailability were identified at O
Externí odkaz:
https://doaj.org/article/304b1b528e39407bac4315715f8e1aef
Publikováno v:
Frontiers in Marine Science, Vol 6 (2019)
Optical instruments can rapidly determine numbers and characteristics of water column particles with high sensitivity. Here we show the usefulness of optically assessed total particle volume below the main pycnocline to estimate carbon export in two
Externí odkaz:
https://doaj.org/article/38f8753a8b164cd99d8567dac1f8cae0
Publikováno v:
Frontiers in Marine Science, Vol 5 (2018)
To understand controls on the production and remineralization of recalcitrant dissolved organic carbon (DOC) produced in association with positive net community production (NCP), we simulated upwelling systems of different intensities by combining an
Externí odkaz:
https://doaj.org/article/94b76f295eeb4784a91508abae860ec5
Publikováno v:
Frontiers in Marine Science, Vol 4 (2018)
More than 96% of organic carbon in the ocean is in the dissolved form, most of it with lifetimes of decades to millennia. Yet, we know very little about the temperature sensitivity of dissolved organic carbon (DOC) degradation in a warming ocean. Com
Externí odkaz:
https://doaj.org/article/c002e0a1352d4fc484867b231efb80d9