Reduced Ocean Carbon Sink in the South and Central North Sea (2014-2018) Revealed From FerryBox Observations

被引：8

作者：

Macovei, V. A. ^{[1
]}

Petersen, W. ^{[1
]}

Brix, H. ^{[1
]}

Voynova, Y. G. ^{[1
]}

机构：

[1] Helmholtz Zentrum Hereon, Inst Coastal Ocean Dynam, Geesthacht, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 2021年 / 48卷 / 11期

关键词：

pCO2; North Sea; FerryBox; carbon; biogeochemistry; trends; CONTINENTAL-SHELF PUMP; LONG-TERM TRENDS; WADDEN SEA; WATER COLUMN; GAS-EXCHANGE; CO2; FLUX; VARIABILITY; ATLANTIC; PCO(2); SYSTEM;

D O I：

10.1029/2021GL092645

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Surface seawater carbon dioxide partial pressure (pCO(2)) in the south-central North Sea was measured between 2014 and 2018 using FerryBox-integrated membrane sensors on ships-of-opportunity. Average annual pCO(2) variability was biologically controlled, with thermal effects modulating its amplitude. Deseasonalized winter trends of seawater pCO(2) were positive (4.4 +/- 2.0-8.4 +/- 2.9 mu atm yr(-1)), biogeochemically driven, stronger than the atmospheric pCO(2) trend, and more pronounced than previous analyses. The trends calculated including all deseasonalized monthly averages were even higher (9.7 +/- 2.8-12.2 +/- 1.4 mu atm yr(-1)). During our investigation, the southern study area became a stronger source and the northern part became a weaker sink for atmospheric carbon. Overall, average sea-air CO2 flux in our study area, from the Skagerrak to the Southern Bight (53 degrees N), changed from -0.75 +/- 0.61 mmol m(-2) day(-1) in 2014 to +0.20 +/- 0.96 mmol m(-2) day(-1) in 2018.

引用

页数：11

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