Sea surface carbon dioxide during early summer at the Tuandao nearshore time series site.
Mar Environ Res
; 201: 106699, 2024 Oct.
Article
em En
| MEDLINE
| ID: mdl-39178709
ABSTRACT
To investigate air-sea CO2 flux at the Qingdao nearshore site and its temporal variations, a high-resolution continuous observation of surface carbon dioxide partial pressure (pCO2) was carried out at Zhongyuan Pier near Tuandao from May 25 to July 8, 2019. It was observed that during this period, surface pCO2 varied between â¼490 and â¼690 µatm, mainly associated with sea surface temperature. Surface pCO2 also displayed substantial diurnal variations, with an average amplitude of 64 ± 21 µatm, largely dominated by biological activities. During the observational period, this site acted as a source of atmospheric CO2, releasing 361 mmol CO2 m-2. The notable diurnal variations in air-sea CO2 flux, such as the observed average amplitude of 10.9 mmol m-2 d-1 in this study, pose a challenge for accurately estimating the air-sea CO2 flux in coastal regions without high-resolution observations.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Estações do Ano
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Água do Mar
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Dióxido de Carbono
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Monitoramento Ambiental
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article