Temperature and salinity variability in the south-eastern corner of the Bay of Biscay (NE Atlantic)

Somavilla, R.; González-Pola, César; Lavín, A.; Rodríguez, Carmen Dolores Arbelo

doi:10.1016/j.jmarsys.2012.02.010

Cited by 8 publications

(13 citation statements)

References 42 publications

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“…where ρ is the seawater density; Cp, the heat capacity of seawater; h, the depth determining the vertical extension of the mixed layer (MLD); and δTa/δt, the temporal evolution of the integrated temperature in the water column (Ta = 1 h 0 −h T(z)dz) (for further details, see [19,20]).…”

Section: Changes In Air-sea Exchanges Near-surface Chlorophyll Deptmentioning

confidence: 99%

Atmospheric Control of Deep Chlorophyll Maximum Development

et al. 2019

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The evolution of the near-surface phytoplankton bloom towards a Deep Chlorophyll Maximum (DCM) in mid-latitudes and subpolar regions of the global ocean is a well-known biological feature. However, our knowledge about the exact mechanism that determines the end of the bloom and its irreversible evolution towards a DCM is still limited. In this work, combining satellite and in-situ oceanographic data together with reanalysis data, we investigate why and when this transition between the near-surface phytoplankton bloom and the development of a DCM occurs. For this aim, we investigate the links between changes in air-sea heat exchanges, the near-surface signature of phytoplankton bloom, and the water column vertical structure by calculating the mixed layer depth (MLD) and depth of the DCM on hydrographic and chlorophyll profiles. We find that the occurrence of the last convective mixing event (heat loss by the ocean surface) at the end of the spring which is able to reach the base of the MLD and inject new nutrients into the mixed layer marks the end of the near-surface bloom and its transition towards a DCM. Identified in this way, the spring bloom duration and the start of the transition towards a DCM can be systematically and objectively determined, providing sensitive indexes of climate and ecosystem variability.

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Section: Changes In Air-sea Exchanges Near-surface Chlorophyll Deptmentioning

confidence: 99%

Atmospheric Control of Deep Chlorophyll Maximum Development

et al. 2019

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“…Hence (Hughes, 2010). Although the core of ENAW in the Bay of Biscay is around 350 dbar, salinity and temperature changes at this depth often have a similar signature higher in the water column (Somavilla, 2013). Hence, the 5-300 m time-series can be used to give an idea of how ENAW characteristics vary in its formation area.…”

Section: Post Mid-2000smentioning

confidence: 99%

Declining nutrient concentrations in the northeast Atlantic as a result of a weakening Subpolar Gyre

Johnson

Inall

Häkkinen

2013

Deep Sea Research Part I: Oceanographic Research Papers

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“…Furthermore, all the information obtained from the IEOOS is valuable for the study of the biological resources and their dependence on the physico-chemical variables (Alemany et al, 2010, e.g. ), and also physical effects like the formation of deep and intermediate water masses (Somavilla et al, 2013;Vargas-Yáñez et al, 2012, e.g. ), modification and transport (Lopez-Jurado et al, 2005, e.g.…”

Section: Discussionmentioning

confidence: 99%

IEOOS: the Spanish Institute of Oceanography Observing System

Tel¹,

Balbín

Cabanas

et al. 2016

Ocean Sci.

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Abstract. Since its foundation, 100 years ago, the Spanish Institute of Oceanography (IEO) has been observing and measuring the ocean characteristics. Here is a summary of the initiatives of the IEO in the field of the operational oceanography. Some systems like the tide gauges network has been working for more than 70 years. The standard sections began at different moments depending on the local projects, and nowadays there are more than 180 coastal stations and deep-sea ones that are systematically sampled, obtaining physical and biochemical measurements. At this moment, the Observing System includes six permanent moorings equipped with current meters, an opensea ocean-meteorological buoy offshore Santander and a sea-surface temperature satellite image station. It also supports the Spanish contribution to the Argo international programme with 47 deployed profilers, and continuous monitoring thermosalinometers, meteorological stations and vesselmounted acoustic Doppler current profilers on the research vessel fleet. The system is completed with the contribution to the Northwest Iberian peninsula and Gibraltar observatories, and the development of regional prediction models. All these systematic measurements allow the IEO to give responses to ocean research activities, official agencies requirements and industrial and main society demands such as navigation, resource management, risks management, recreation, as well as for management development pollution-related economic activities or marine ecosystems. All these networks are linked to international initiatives, framed largely in supranational programmes of Earth observation sponsored by the United Nations or the European Union. The synchronic observation system permits a spatio-temporal description of some events, such as new deep water formation in the Mediterranean Sea and the injection of heat to intermediate waters in the Bay of Biscay after some colder northern storms in winter 2005.

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Temperature and salinity variability in the south-eastern corner of the Bay of Biscay (NE Atlantic)

Cited by 8 publications

References 42 publications

Atmospheric Control of Deep Chlorophyll Maximum Development

Atmospheric Control of Deep Chlorophyll Maximum Development

Declining nutrient concentrations in the northeast Atlantic as a result of a weakening Subpolar Gyre

IEOOS: the Spanish Institute of Oceanography Observing System

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