The influence of short-term variability in surface water pCO2 on modelled air-sea CO2 exchange

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Lansö, Anne SofieUniv Paris Saclay, CEA CNRS UVSQ, LSCE IPSL, Lab Sci Climat & Environm, Gif Sur Yvette, France;Aarhus Univ, Dept Environm Sci, Roskilde, Denmark (författare)

The influence of short-term variability in surface water pCO2 on modelled air-sea CO2 exchange

Artikel/kapitelEngelska2017

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2017-01-01
Stockholm University Press,2017
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LIBRIS-ID:oai:DiVA.org:uu-361238
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-361238URI
https://doi.org/10.1080/16000889.2017.1302670DOI

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Språk:engelska
Sammanfattning på:engelska

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Coastal seas and estuarine systems are highly variable in both time and space and with their heterogeneity difficult to capture with measurements. Models are useful tools in obtaining a better spatiotemporal coverage or, at least, a better understanding of the impacts such heterogeneity has in driving variability in coastal oceans and estuaries. A model-based sensitivity study is constructed in this study in order to examine the effects of short-term variability in surface water pCO(2) on the annual air-sea CO2 exchange in coastal regions. An atmospheric transport model formed the basis of the modelling framework for the study of the Baltic Sea and the Danish inner waters. Several maps of surface water pCO(2) were employed in the modelling framework. While a monthly Baltic Sea climatology (BSC) had already been developed, the current study further extended this with the addition of an improved near-coastal climatology for the Danish inner waters. Furthermore, daily surface fields of pCO(2) were obtained from a mixed layer scheme constrained by surface measurements of pCO(2) (JENA). Short-term variability in surface water pCO(2) was assessed by calculating monthly mean diurnal cycles from continuous measurements of surface water pCO(2), observed at stationary sites within the Baltic Sea. No apparent diurnal cycle was evident in winter, but diurnal cycles (with amplitudes up to 27 mu atm) were found from April to October. The present study showed that the temporal resolution of surface water pCO(2) played an influential role on the annual air-sea CO2 exchange for the coastal study region. Hence, annual estimates of CO2 exchanges are sensitive to variation on much shorter time scales, and this variability should be included for any model study investigating the exchange of CO2 across the air-sea interface. Furthermore, the choice of surface pCO(2) maps also had a crucial influence on the simulated air-sea CO2 exchange.

Ämnesord och genrebeteckningar

NATURVETENSKAP Geovetenskap och miljövetenskap Meteorologi och atmosfärforskning hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Meteorology and Atmospheric Sciences hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Klimatforskning hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Climate Research hsv//eng
Air-sea CO2 exchange
carbon dioxide
coastal zone
Baltic Sea
temporal resolution

Biuppslag (personer, institutioner, konferenser, titlar ...)

Sörensen, Lise LotteAarhus Univ, Dept Biosci, ARC, Aarhus, Denmark (författare)
Christensen, Jesper H.Aarhus Univ, Dept Biosci, ARC, Aarhus, Denmark;Aarhus Univ, Dept Environm Sci, Roskilde, Denmark (författare)
Rutgersson, Anna,1971-Uppsala universitet,Luft-, vatten- och landskapslära(Swepub:uu)aru27058 (författare)
Geels, CamillaAarhus Univ, Dept Environm Sci, Roskilde, Denmark (författare)
Univ Paris Saclay, CEA CNRS UVSQ, LSCE IPSL, Lab Sci Climat & Environm, Gif Sur Yvette, France;Aarhus Univ, Dept Environm Sci, Roskilde, DenmarkAarhus Univ, Dept Biosci, ARC, Aarhus, Denmark (creator_code:org_t)

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Ingår i:Tellus. Series B, Chemical and physical meteorology: Stockholm University Press690280-65091600-0889

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Av författaren/redakt...: Lansö, Anne Sofi ...; Sörensen, Lise L ...; Christensen, Jes ...; Rutgersson, Anna ...; Geels, Camilla

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NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Meteorologi och ...

NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Klimatforskning

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Av lärosätet: Uppsala universitet

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