eprintid: 6713
rev_number: 9
eprint_status: archive
userid: 1
dir: disk0/00/00/67/13
datestamp: 2006-08-08 14:21:30
lastmod: 2014-08-20 15:55:26
status_changed: 2012-08-14 15:19:21
type: article
metadata_visibility: show
creators_name: Naegler, Tobias
creators_name: Ciais, Philippe
creators_name: Rodgers, Keith
creators_name: Levin, Ingeborg
title: Excess radiocarbon constraints on air-sea gas exchange and the uptake of CO2 by the oceans
ispublished: pub
subjects: 530
divisions: 130500
keywords: Gasaustausch , Radiokohlenstoffgas exchange , radiocarbon , carbon cycle
cterms_swd: Kohlenstoffkreislauf
note: L11802, doi:1029/2005GL025408 
abstract: We re-assess the constraints that estimates of the global ocean excess radiocarbon inventory place on air-sea gas exchange. We found that the gas exchange scaling parameter aq cannot be constrained by the excess radiocarbon inventory alone. Non-negligible biases in different global wind speed datasets require a careful adaptation of aq to the wind field chosen. Furthermore, aq depends on the spatial and temporal resolution of the wind fields.  We develop a new wind speed- and inventory-normalized gas exchange parameter aqN which takes into account these biases and which is easily adaptable to any new estimate of the ocean excess radiocarbon inventory. Our study yields an average estimate of aq of 0.32+/-0.05 for monthly mean winds, lower than the previous estimate (0.39) from Wwanninkhof (1992). We calculate a global annual average piston velocity for CO2 of (16.7+/-2.9) cm/hr and a gross CO2 flux between atmosphere and ocean of (73+/-10) PgC/yr, significantly lower than results from previous studies.
abstract_translated_lang: eng
class_scheme: pacs
class_labels: 92.60.Cc, 92.20.Xy
date: 2006
date_type: published
id_scheme: DOI
id_number: 10.11588/heidok.00006713
ppn_swb: 1644604906
own_urn: urn:nbn:de:bsz:16-opus-67139
language: eng
bibsort: NAEGLERTOBEXCESSRADI2006
full_text_status: public
publication: Geophysical Research Letters
volume: 33
citation:   Naegler, Tobias ; Ciais, Philippe ; Rodgers, Keith ; Levin, Ingeborg  (2006) Excess radiocarbon constraints on air-sea gas exchange and the uptake of CO2 by the oceans.  Geophysical Research Letters, 33.       
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/6713/1/NaeglerGRL2006.pdf