Is there a "continental shelf pump" for the absorption of atmospheric
                        CO&lt;sub&gt;2&lt;/sub&gt;?

Tsunogai, Shizuo; Watanabe, Shuichi; Sato, Tetsuro

doi:10.3402/tellusb.v51i3.16468

Cited by 275 publications

(169 citation statements)

References 14 publications

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“…Although the marginal seas are generally regarded as CO 2 sinks, airsea CO 2 flux estimates for marginal seas still contain much uncertainty due to insufficient spatial and temporal observation data; reported estimates of air-sea CO 2 flux range from 0.1 to 0.45 Pg C yr −1 (Liu et al 2000; Thomas et al 2004;Borges et al 2005;Chen and Borges 2009). Researchers are increasingly recognizing the importance of marginal seas to the global carbon cycle, particularly in regard to the "continental shelf pump" carbon sequestration process by which carbon absorbed by biological activity in a shallow water body sinks to the subsurface water and is transported to the deep ocean for long-term sequestration (Tsunogai et al 1999;Yool and Fasham 2000;Thomas et al 2004;Bozec et al 2005;Omar et al 2007). Thus better understanding of carbon processes in marginal seas should help improve our estimations of the global carbon budget.…”

Section: Introductionmentioning

confidence: 99%

The spatial distribution of surface fCO2 in the Southwestern East Sea/Japan sea during summer 2005

et al. 2011

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Fugacity of CO 2 (fCO 2 ), temperature, salinity, nutrients, and chlorophyll-a were measured in the surface waters of southwestern East Sea/Japan Sea in July 2005. Surface waters were divided into three waters based on hydrographic characteristics: the water with moderate sea surface temperature (SST) and high sea surface salinity (SSS) located east of the front (East water); the water with high SST and moderate SSS located west of the front (West water); and the water with low SST and SSS located in the middle part of the study area (Middle water). High fCO 2 larger than 420 µatm were found in the West water. In the Middle water, CO 2 was undersaturated with respect to the atmosphere, with values between 246 and 380 µatm. Moderate f CO 2 values ranging from 370 to 420 µatm were observed in the East water. For the East and West waters, estimates of temperature dependency of f CO 2 (12.6 and 15.1 µatm o C −1 , respectively) were rather similar to a theoretical value, indicating that SST is likely to be a major factor controlling the surface f CO 2 distribution in these two regions. In the Middle water, however, the estimated temperature dependence was somewhat lower than the theoretical value, and relatively high concentrations of surface chlorophyll-a coincided with the low surface f CO 2 , implying that biological uptake may considerably affect the f CO 2 distribution. The net sea-to-air CO 2 flux of the study area was estimated to be 0.30±4.81 mmol m −2 day −1 in summer, 2005.

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Section: Introductionmentioning

confidence: 99%

The spatial distribution of surface fCO2 in the Southwestern East Sea/Japan sea during summer 2005

et al. 2011

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“…Being as the transition zone between the largest continent-Eurasia-and the biggest ocean-the Pacific-the ECS has always been considered a significant sink for atmospheric CO 2 [5][6][7][8][9][10][11][12]. In the 1990s, Japanese scientists first reported the CO 2 sink/source terms of ECS, based on their limited survey conducted in the "PN line" [13,14]. Thereafter, Chinese scientists launched large-scale field surveys to study the air-sea CO 2 exchanging process in ECS [5,7,9,10,15,16].…”

Section: Introductionmentioning

confidence: 99%

“…For example, a study conducted in ECS in the summer revealed that the reason some heterotrophic marginal seas could act as significant CO 2 sinks was because of high biological productivity and concurrent intensive seasonal stratification [8,24]. What is more, extrapolating from observations conducted in the ECS, Tusungai et al (1999) proposed the concept of "continental shelf pump" to explain why the ECS could absorb atmospheric CO 2 at a very high rate (2.92 mol C/m 2 /yr 1 ) and suggested the continental shelf pump would account for a net oceanic uptake of CO 2 in the flux of 1.0 Pg C/yr, if the whole global continental shelf could absorb atmospheric CO 2 at the rate they obtained in the ECS [14].…”

Section: Introductionmentioning

confidence: 99%

Carbon Chemistry in the Mainstream of Kuroshio Current in Eastern Taiwan and Its Transport of Carbon into the East China Sea Shelf

Song

Yuan

et al. 2018

Sustainability

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Abstract:Comprehensive carbon chemistry data were measured from the mainstream of Kuroshio, off eastern Taiwan, in May 2014. Results indicated that variations of pH@25 • C, POC, Ω Ca , DIC, pCO 2 and RF were closely related to the characteristics of various water types. Phytoplankton photosynthesis played important roles in DIC variation in Kuroshio Surface Water (KSW), whereas the DIC variation in Kuroshio Subsurface Water (KSSW) was probably influenced by the external transport of DIC-enriched water from the South China Sea. Vertical profiles of hydrological parameters and carbonate species indicated that the Kuroshio Current off eastern Taiwan could intrude into the ECS shelf as far as 27.9 • E, 125.5 • N in spring. What is more, the KSW, KSSW and Kuroshio Intermediate Water (KIW) could convey DIC into the East China Sea (ECS) with flux of 285, 305 and 112 Tg C/half year (1 Tg = 10 12 g), respectively. The relevant flux of POC was 0.16, 2.93 and 0.04 Tg C/half year, respectively. Consequently, the intrusion of Kuroshio could probably exert a counteracting influence on the potential of CO 2 uptake in the ECS, which needs further study.

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“…Since the1990s, the carbon dioxide system in the China Seas has been studied (Han et al, 1990;Xie and Zhou, 1991;Guo, 1994;Tsunogai et al, 1997Tsunogai et al, , 1999Zhang et al, 1997Zhang et al, , 2000Peng, 1999;Cai and Wang, 1998;Wang et al, 2002;Shim et al, 2007;Liu et al, 2008). However, these studies mainly concentrated on pH and alkalinity or pCO 2 .…”

Section: Introductionmentioning

confidence: 95%

Distribution of dissolved inorganic carbon (DIC) and its related parameters in seawater of the North Yellow Sea and off the Qingdao Coast in October, 2007

Hong-wei

Sheng

Xin

et al. 2009

J. Ocean Univ. China

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Data on the distribution of dissolved inorganic carbon (DIC) were obtained from two cruises in the North Yellow Sea (NYS) and off the Qingdao Coast (QC) in October, 2007. Carbonate parameters were calculated. The concentrations of DIC are from 1.896−2.229 mmolL -1 in the NYS and from 1.939−2.032 mmolL -1 off the QC. In the southwest of the NYS, DIC in the upper layers decreases from the north of the SP (Shandong Peninsula) shelf to the center of the NYS; whereas in the lower layers DIC increases from the north of the SP shelf to the center of the NYS and South Yellow Sea. In the northeast of the NYS, DIC in all layers increases from the YR (Yalu River) estuary to the centre of the NYS. The distribution of DIC in NYS can be used as an indicator of Yellow Sea Cold Water Mass (YSCWM). Air-sea CO 2 fluxes were calculated using three models and the results suggest that both the NYS and the QC waters are potential sources of atmospheric CO 2 in October.

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Is there a "continental shelf pump" for the absorption of atmospheric CO<sub>2</sub>?

Cited by 275 publications

References 14 publications

The spatial distribution of surface fCO2 in the Southwestern East Sea/Japan sea during summer 2005

The spatial distribution of surface fCO2 in the Southwestern East Sea/Japan sea during summer 2005

Carbon Chemistry in the Mainstream of Kuroshio Current in Eastern Taiwan and Its Transport of Carbon into the East China Sea Shelf

Distribution of dissolved inorganic carbon (DIC) and its related parameters in seawater of the North Yellow Sea and off the Qingdao Coast in October, 2007

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