Iberia Coastal Ocean in the CO<sub>2</sub>Sink/Source Context: Portugal Case Study

Oliveira, A. P.; Cabeçadas, G.; Pilar-Fonseca, Tereza

doi:10.2112/jcoastres-d-10-00060.1

Cited by 12 publications

(20 citation statements)

References 54 publications

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“…During spring and summer pCO 2 values dropped to 402 µatm and increased again to a maximum of 990 µatm in autumn, showing an oversaturation of~250%. These values fall within the ranges reported for other coastal systems [9,11,44].…”

Section: Seasonal Variabilitysupporting

confidence: 89%

“…Throughout the year 2007, the part of the Tagus estuary directly influenced by marine waters acted as a weak source of CO 2 to the atmosphere, at an average rate of 7.2 mol•C•m −2 •year −1 (average value for the three parameterizations). This value is within the range reported for near-shore ecosystems [9,11].…”

Section: Air-water Co 2 Exchangesupporting

confidence: 88%

“…Scaling up this value yields CO 2 emissions of 0.10 Pg•C•year −1 [8], which is much lower than published values by Chen and Borges [9], for example, mainly because of the contribution of a considerable amount of unpublished or new data from Asia and the Arctic [10]. Oliveira et al [11] have shown that the Portuguese western near-shore ecosystems emit 0.3 Tg•C•year −1 to the atmosphere, corresponding to~0.3% of the total estimated CO 2 worldwide emissions for near-shore ecosystems [8]. A relevant feature of these compilations is the great variability of CO 2 partial pressure (pCO 2 ), ranging between 143 and 11,335 µatm, and yielding air-water fluxes from 2.2 to 76.0 mol•C•m −2 •year −1 .…”

Section: Introductionmentioning

confidence: 82%

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Local Variability of CO2 Partial Pressure in a Mid-Latitude Mesotidal Estuarine System (Tagus Estuary, Portugal)

et al. 2018

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Estuaries play a crucial role in regional carbon cycling. Until now, accurate estimations of the impact of environmental variables on estuarine air–water CO2 fluxes have been mostly characterized by a low spatial-temporal sampling resolution. This study reports on the variations of CO2 partial pressure (pCO2) and related environmental parameters, at both tidal and seasonal temporal scales, in the surface seawater of a station located in the lower section of the Tagus estuary, Portugal. The study was carried out from February to December 2007. Air–water CO2 fluxes suggest that the lower estuary acted as a relatively weak source of CO2 to the atmosphere, with an average rate of 7.2 mol∙m−2∙year−1, with highest fluxes occurring in winter. Over a tidal cycle, pCO2 was mainly influenced by tidal-induced mixing. Results suggest an influence of upper and central estuary inputs with higher pCO2 values. pCO2 varied seasonally, with values decreasing from ~890 µatm in winter to ~400 µatm in summer and increasing again to ~990 µatm in autumn. The generalized linear model (GLM) applied to the data set explained 69.3% of the pCO2 variability, pointing to the thermodynamic effect of temperature and biological activity as the most relevant processes in CO2 dynamics. Tidal variation of pCO2 corresponded to ~35% of its seasonal variability, denoting the importance of tide conditions on the dynamics of inorganic carbon. Results showed distinct patterns in the dynamics of CO2 at the tidal scale. This outcome suggests that disregarding tidal variability in the use of seasonal data sets may lead to significant errors in annual carbon budget estimations.

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Section: Seasonal Variabilitysupporting

confidence: 89%

Section: Air-water Co 2 Exchangesupporting

confidence: 88%

Section: Introductionmentioning

confidence: 82%

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Local Variability of CO2 Partial Pressure in a Mid-Latitude Mesotidal Estuarine System (Tagus Estuary, Portugal)

et al. 2018

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“…(4) The influence of environmental regulation on trade appears to be different under various industries, economic entities and regulation methods. Oliveira, Cabeçadas, and Tereza (2012) noticed the necessity of industrial differentiation at early times, and found out that cost for environmental regulation posed negative influence on total export volume and non-resources pollution-intensive industries, but posed no influence on pollution industries. Peng and Liu (2010) have tested that influences of environmental regulation on net export of diverse products are different.…”

Section: Introductionmentioning

confidence: 99%

The Empirical Analysis on the Influence of CO₂Emission Regulation on the Export Transformation of Chinese Manufacturing Industries

Cheng

Mao

2015

Journal of Coastal Research

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Cheng, H.; Li, F., and Mao, Q., 2015. The empirical analysis on the influence of CO 2 emission regulation on the export transformation of Chinese manufacturing industries.Since China has begun to implement stringent CO 2 emission regulation, foreign trade competitiveness suffers from great impact. Under fixed emission regulation concerning different emission distribution methods, there exist differences in effects on export competitiveness as well as industrial transformation and upgrading. In this paper, based on the bilateral panel data of China and 32 trading partners during 1992 and 2011, model of multiple panel regression is applied to conduct empirical analysis on the influence of CO 2 emission regulation. The results show that the enhancement of CO 2 emission regulation is conducive to the improvement of the export competitiveness of Chinese manufacturing industries. Meanwhile, there are different influence degrees of regulation on various industries, among which the clean industry is the most influenced by the regulation. As for various manufacturing industries, there are three distribution policies, namely, emission distribution on the basis of output, average distribution on the basis of unit emission and accumulative distribution on the basis of unit emission. Moreover, the advantages and disadvantages of the influences of these three policies on export competitiveness, transformation and upgrading of Chinese manufacturing industries would be compared so as to determine which distribution policy is most beneficial. The results illustrate that "average CO 2 emission distribution on the basis of unit emission" makes the greatest contribution to the export transformation and upgrading of Chinese manufacturing industries, and it is in conformity with development need of Chinese trade at current phase. The innovation of the paper lies in its adoption of bilateral trade data to specifically study the influence of CO 2 emission regulation on trade competitiveness. The attention is specially attached to the performance differences of different emission distribution policies in trade competitiveness, which is the further exploration on the basis of previous studies. ADDITIONAL INDEX WORDS:CO 2 emission regulation, trade competitiveness, export transformation, effect of emission reduction policy.

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“…The appropriate algorithms for the estimation of gas fluxes across the air-water interface have been the subject of great concern by the scientific community. One of its most notorious applications is in studies about the CO 2 exchange between the atmosphere and the global oceans (Takahashi et al, 2002(Takahashi et al, , 2009 coastal oceans (Frankignoulle, 1988;Sweeney, 2003;Vandemark et al, 2011), estuaries (Carini et al, 1996;Raymond et al, 2000;Hunt et al, 2011;Oliveira, 2011;Oliveira et al, 2012), rivers (Cole and Caraco, 2001), lagoons (Thomaz et al, 2001) and lakes (Cole and Caraco, 1998;Koné et al, 2009;Sahlée et al, 2011). The marine and aquatic environments may work as either net sinks or net sources of CO 2 for the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Numerical tools to estimate the flux of a gas across the air–water interface and assess the heterogeneity of its forcing functions

Vieira¹,

Martins

Silva

et al. 2013

Ocean Sci.

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A numerical tool was developed for the estimation of gas fluxes across the air–water interface. The primary objective is to use it to estimate CO₂ fluxes. Nevertheless application to other gases is easily accomplished by changing the values of the parameters related to the physical properties of the gases. A user-friendly software was developed allowing to build upon a standard kernel a custom-made gas flux model with the preferred parameterizations. These include single or double layer models; several numerical schemes for the effects of wind in the air-side and water-side transfer velocities; the effects of atmospheric stability, surface roughness and turbulence from current drag with the bottom; and the effects on solubility of water temperature, salinity, air temperature and pressure. An analysis was also developed which decomposes the difference between the fluxes in a reference situation and in alternative situations into its several forcing functions. This analysis relies on the Taylor expansion of the gas flux model, requiring the numerical estimation of partial derivatives by a multivariate version of the collocation polynomial. Both the flux model and the difference decomposition analysis were tested with data taken from surveys done in the lagoon system of Ria Formosa, south Portugal, in which the CO₂ fluxes were estimated using the infrared gas analyzer (IRGA) and floating chamber method, whereas the CO₂ concentrations were estimated using the IRGA and degasification chamber. Observations and estimations show a remarkable fit

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Iberia Coastal Ocean in the CO₂Sink/Source Context: Portugal Case Study

Cited by 12 publications

References 54 publications

Local Variability of CO2 Partial Pressure in a Mid-Latitude Mesotidal Estuarine System (Tagus Estuary, Portugal)

Local Variability of CO2 Partial Pressure in a Mid-Latitude Mesotidal Estuarine System (Tagus Estuary, Portugal)

The Empirical Analysis on the Influence of CO₂Emission Regulation on the Export Transformation of Chinese Manufacturing Industries

Numerical tools to estimate the flux of a gas across the air–water interface and assess the heterogeneity of its forcing functions

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Iberia Coastal Ocean in the CO2Sink/Source Context: Portugal Case Study

Cited by 12 publications

References 54 publications

Local Variability of CO2 Partial Pressure in a Mid-Latitude Mesotidal Estuarine System (Tagus Estuary, Portugal)

Local Variability of CO2 Partial Pressure in a Mid-Latitude Mesotidal Estuarine System (Tagus Estuary, Portugal)

The Empirical Analysis on the Influence of CO2Emission Regulation on the Export Transformation of Chinese Manufacturing Industries

Numerical tools to estimate the flux of a gas across the air–water interface and assess the heterogeneity of its forcing functions

Contact Info

Product

Resources

About

Iberia Coastal Ocean in the CO₂Sink/Source Context: Portugal Case Study

The Empirical Analysis on the Influence of CO₂Emission Regulation on the Export Transformation of Chinese Manufacturing Industries