English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Large Contribution of Pteropods to Shallow CaCO3 Export

Buitenhuis, E. T., Le Quere, C., Bednarsek, N., & Schiebel, R. (2019). Large Contribution of Pteropods to Shallow CaCO3 Export. Global Biogeochemical Cycles, 33(3), 458-468. doi:10.1029/2018GB006110.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0003-EA81-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-EA82-2
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Buitenhuis, Erik T.1, Author
Le Quere, Corinne1, Author
Bednarsek, Nina1, Author
Schiebel, Ralf2, Author              
Affiliations:
1external, ou_persistent22              
2Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_2237635              

Content

show
hide
Free keywords: -
 Abstract: The literature on the relative contributions of pelagic calcifying taxa to the global ocean export of CaCO3 is divided. Studies based on deep sediment trap data tend to argue that either foraminifers or coccolithophores, both calcite producers, dominate export. However, the compilations of biomass observations for pteropods, coccolithophores, and foraminifers instead show that pteropods dominate the global ocean calcifier biomass and therefore likely also carbonate export. Here we present a new global ocean biogeochemical model that explicitly represents these three groups of pelagic calcifiers. We synthesize databases of the physiology of the three groups to parameterize the model and then tune the unconstrained parameters to reproduce the observations of calcifier biomass and CaCO3 export. The model can reproduce both these observational databases; however, substantial dissolution of aragonite above the aragonite saturation horizon is required to do so. We estimate a contribution of pteropods to shallow (100 m) export of CaCO3 of at least 33% and to pelagic calcification of up to 89%. The high production‐high dissolution configuration that shows closest agreement with all the observations has a CaCO3 production of 4.7 Pg C/year but CaCO3 export at 100 m of only 0.6 Pg C/year.

Details

show
hide
Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000464651600012
DOI: 10.1029/2018GB006110
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Global Biogeochemical Cycles
  Alternative Title : Glob. Biogeochem. Cycle
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, DC : American Geophysical Union
Pages: - Volume / Issue: 33 (3) Sequence Number: - Start / End Page: 458 - 468 Identifier: ISSN: 0886-6236
n.a.: /journals/resource/954925553383