Dataset.

Methane emissions in the coastal Balearic Sea between October 2019 – October 2021

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/332738
Digital.CSIC. Repositorio Institucional del CSIC
  • Hendriks, Iris E.
  • Flecha, Susana
  • Paz, M. de la
  • Pérez, Fiz F.
  • Morell Lujan-Williams, Alejandro
  • Tintoré, Joaquín
  • Barbà, Núria
[Description of methods used for collection/generation of data] Periodically water sampling for dissolved oxygen (DO) and total alkalinity (TA) was done during the sensor maintenance campaigns of BOATS. In two sites, monthly samples were collected from the same depth as the sensors of the BOATS stations, at 1m at the oceanographic buoy, and 4m in PN Cabrera. Samples were taken for dissolved methane (CH4), dissolved oxygen (DO), total alkalinity (TA), dissolved organic carbon (DOC), Chlorophyll a (Chl a), In both stations monthly discrete samples were collected, at 1 m in the Bay of Palma, Surface for Cap ses Salines and at 4 m depth in Cabrera. Samples were collected by submerging a hose connected to a pump at the sensor height of the BOATS stations in Cabrera and the Bay of Palma. At the third site, the lighthouse of Cap ses Salines, a bucket was used to obtain surface water samples., readme provides background information for xlsx datafiles., Methane (CH4) gas is the most important greenhouse gas (GHG) after carbon dioxide, with open ocean areas acting as discreet CH4 sources and coastal regions as intense but variable CH4 sources to the atmosphere. In this database we report measured CH4 concentrations and calculated air-sea fluxes in three sites of the coastal area of the Balearic Islands Archipelago (Western Mediterranean Basin). CH4 levels and related biogeochemical variables were measured in three coastal sampling sites between 2019 and 2021. CH4 concentrations in seawater ranged from 2.7 to 10.9 nM, without significant differences between the sampling sites. Averaged estimated CH4 fluxes during the sampling period for the three stations oscillated between 0.2 and 9.7 μmol m−2 d−1 following a seasonal pattern and in general all sites behaved as weak CH4 sources throughout the sampling period., Funding for this work was provided by the projects RTI2018-095441-B-C21 (SuMaEco) and, the BBVA Foundation project Posi-COIN and the Balearic Islands Government project SEPPO (PRD2018/18). This work is a contribution to CSIC’s Thematic Interdisciplinary Platform PTI OCEANS+., Peer reviewed
 

DOI: http://hdl.handle.net/10261/332738, https://doi.org/10.20350/digitalCSIC/15491
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/332738

HANDLE: http://hdl.handle.net/10261/332738, https://doi.org/10.20350/digitalCSIC/15491
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/332738
 
Ver en: http://hdl.handle.net/10261/332738, https://doi.org/10.20350/digitalCSIC/15491
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/332738

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/268182
Publicaciones de conferencias: comunicaciones, ponencias, pósters, etc (conferenceObject). 2022

SPATIAL AND TEMPORAL VARIATION OF METHANE EMISSIONS IN THE COASTAL AREA OF MAJORCA AND CABRERA

Digital.CSIC. Repositorio Institucional del CSIC
  • Rueda, D.
  • Flecha, Susana
  • Hendriks, Iris E.
  • Pérez, Fiz F.
  • Paz, M. de la
  • Alou-Font, Eva
  • Tintoré, Joaquín
  • Marbà, Núria
Trabajo presentado en el ASLO Aquatic Sciences Meeting, celebrado de forma virtual del 22 al 27 de junio de 2021, Methane (CH4) is the second most important greenhouse gas after carbon dioxide (CO2), and is responsible for approximately 20% of the radiative forcing by well-mixed greenhouse gases in the lower atmosphere. In oceanic systems, shelf regions and estuaries are a minor source of atmospheric CH4 emitting around 2.3 - 15.6 Tg CH4 yr -1, while their contribution is probably higher due to sedimentary sources in coastal areas. However, these estimates show high uncertainties and seasonal variability, and results are mostly limited to the specific study area, especially in marginal areas. In this study, we sampled a range of three different locations along the Mallorca coast, including the archipelago of Cabrera (Bay of Palma, Cap Ses Salines, and Cala Santa Maria in PN Cabrera). Samples are taken from surface water and apart from CH4 additional variables were monitored such as temperature, salinity, DOC, alkalinity, and Chl a. To determine water-atmosphere fluxes, we used the transfer coefficient and the difference in concentrations between water and atmospheric values. The samples presented a concentration range of 2.7 - 4.5 nmol L -1 CH4 with an average of 3.9 nmol L -1. Fluxes were seasonal with the highest flow estimates for summer whereas the lowest estimates were obtained in winter. Finally, we determined the relationship between different environmental variables and their effect on the estimation of CH4 fluxes and discuss spatial patterns.




Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/286526
Artículo científico (article). 2023

SPATIAL AND TEMPORAL VARIATION OF METHANE EMISSIONS IN THE COASTAL BALEARIC SEA, WESTERN MEDITERRANEAN

Digital.CSIC. Repositorio Institucional del CSIC
  • Flecha, Susana
  • Rueda, D.
  • Paz, M. de la
  • Pérez, Fiz F.
  • Alou-Font, Eva
  • Tintoré, Joaquín
  • Hendriks, Iris E.
13 pages, 2 tables, 6 figures.-- Under a Creative Commons license, Methane (CH4) gas is the most important GHG after carbon dioxide, with open ocean areas acting as discreet CH4 sources and coastal regions as intense but variable CH4 sources to the atmosphere. Here, we report CH4 concentrations and air-sea fluxes in the coastal area of the Balearic Islands Archipelago (Western Mediterranean Basin). CH4 levels and related biogeochemical variables were measured in three coastal sampling sites between 2018 and 2021, with two located close to the densely populated island of Mallorca and one in a pristine area in the Cabrera Archipelago National Park. CH4 concentrations in seawater during the study period ranged from 2.7 to 10.9 nM, without significant differences between the sampling sites. Averaged estimated CH4 fluxes during the sampling period for the three stations oscillated between 0.2 and 9.7 μmol m-2 d-1 according to a seasonal pattern and in general all sites behaved as weak CH4 sources throughout the sampling period., Funding for this work was provided by the Spanish Ministry of Science (SumaEco, RTI2018–095441-B-C21), the Government of the Balearic Islands through la Consellería d'Innovació, Recerca i Turisme (Projecte de recerca científica i tecnològica SEPPO, PRD2018/18) and the 2018 call of BBVA Foundation “Ayudas a equipos de investigación científica” as the Posi-COIN Project. SF acknowledges the financial support of a “Margalida Comas” and “Vicenç Munt Estabilitat” postdoctoral contracts and project AAEE111/2017 from the Balearic Islands Government and the PTA2018–015585-I funded by the Spanish Ministry of Science, DRC was supported by the JAE-Intro 2021 CSIC fellowship Programme. MP acknowledges the financial support during the study period to the contracts funded by the Spanish Ministry of Science CTM2015–74510-JIN and PTA2019–017983-I. This work is a contribution to CSIC's Thematic Interdisciplinary Platform PTI WATER:iOS, Peer reviewed




Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/332738
Dataset. 2023

METHANE EMISSIONS IN THE COASTAL BALEARIC SEA BETWEEN OCTOBER 2019 – OCTOBER 2021

Digital.CSIC. Repositorio Institucional del CSIC
  • Hendriks, Iris E.
  • Flecha, Susana
  • Paz, M. de la
  • Pérez, Fiz F.
  • Morell Lujan-Williams, Alejandro
  • Tintoré, Joaquín
  • Barbà, Núria
[Description of methods used for collection/generation of data] Periodically water sampling for dissolved oxygen (DO) and total alkalinity (TA) was done during the sensor maintenance campaigns of BOATS. In two sites, monthly samples were collected from the same depth as the sensors of the BOATS stations, at 1m at the oceanographic buoy, and 4m in PN Cabrera. Samples were taken for dissolved methane (CH4), dissolved oxygen (DO), total alkalinity (TA), dissolved organic carbon (DOC), Chlorophyll a (Chl a), In both stations monthly discrete samples were collected, at 1 m in the Bay of Palma, Surface for Cap ses Salines and at 4 m depth in Cabrera. Samples were collected by submerging a hose connected to a pump at the sensor height of the BOATS stations in Cabrera and the Bay of Palma. At the third site, the lighthouse of Cap ses Salines, a bucket was used to obtain surface water samples., readme provides background information for xlsx datafiles., Methane (CH4) gas is the most important greenhouse gas (GHG) after carbon dioxide, with open ocean areas acting as discreet CH4 sources and coastal regions as intense but variable CH4 sources to the atmosphere. In this database we report measured CH4 concentrations and calculated air-sea fluxes in three sites of the coastal area of the Balearic Islands Archipelago (Western Mediterranean Basin). CH4 levels and related biogeochemical variables were measured in three coastal sampling sites between 2019 and 2021. CH4 concentrations in seawater ranged from 2.7 to 10.9 nM, without significant differences between the sampling sites. Averaged estimated CH4 fluxes during the sampling period for the three stations oscillated between 0.2 and 9.7 μmol m−2 d−1 following a seasonal pattern and in general all sites behaved as weak CH4 sources throughout the sampling period., Funding for this work was provided by the projects RTI2018-095441-B-C21 (SuMaEco) and, the BBVA Foundation project Posi-COIN and the Balearic Islands Government project SEPPO (PRD2018/18). This work is a contribution to CSIC’s Thematic Interdisciplinary Platform PTI OCEANS+., Peer reviewed





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