Intrusion of coastal waters into the pelagic eastern Mediterranean: in situ and satellite-based characterization

Efrati, Shai; Lehahn, Yoav; Rahav, Eyal; Kress, Nurit; Herut, Barak; Gertman, Isaac; Goldman, Ron; Ozer, Tal; Lazar, Michael; Heifetz, Eyal

doi:10.5194/bg-10-3349-2013

Cited by 36 publications

(31 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The correlation with the OW parameter, which is a measure to morphology of mesoscale eddies as observed in a satellite‐derived velocity field [ Lehahn et al ., ], indicates that aerosol concentrations varied in space in response to mesoscale oceanic variability at the vicinity of eddy A . This is supported by the fact the leg included crossing of LCS (Figure b), which may separate between water bodies with distinct physical and biogeochemical characteristics [ Lehahn et al ., ; d ' Ovidio et al ., ; Efrati et al ., ].…”

Section: Resultsmentioning

confidence: 99%

Decoupling atmospheric and oceanic factors affecting aerosol loading over a cluster of mesoscale North Atlantic eddies

Lehahn

Koren

Rudich

et al. 2014

Geophys. Res. Lett.

View full text Add to dashboard Cite

Using shipboard and satellite measurements we explore the environmental factors affecting the number concentration of aerosols with diameter 100 < D < 1000 nm over a cluster of three mesoscale (~10-100 km) eddies in the North Atlantic. Strongest sensitivity to environmental conditions was found in the 400 < D < 1000 nm size range. In this size range particle concentrations were closely linked to the surface wind speed, indicating in situ production of sea spray aerosols by wind-driven processes. Particle concentrations were also affected by mesoscale variability in oceanic conditions at the vicinity of an anticyclonic eddy. In addition, a distinct aerosol population possibly produced at a distance of~1000-2000 km from the study area was identified. The results highlight the importance of oceanic and atmospheric mesoscale processes in determining the characteristics of aerosols over the marine environment.

show abstract

Section: Resultsmentioning

confidence: 99%

Decoupling atmospheric and oceanic factors affecting aerosol loading over a cluster of mesoscale North Atlantic eddies

Lehahn

Koren

Rudich

et al. 2014

Geophys. Res. Lett.

View full text Add to dashboard Cite

show abstract

“…Recently, relatively high concentrations of biogenic silica were found in some areas, perhaps related to the presence of eddies (Crombet et al, 2011). High silica in a filament stretching from the coast to the open sea in the Levantine Basin were reported as well (Efrati et al, 2013) (Fig. 20).…”

Section: Present Knowledgementioning

confidence: 95%

Physical forcing and physical/biochemical variability of the Mediterranean Sea: a review of unresolved issues and directions for future research

Artale²,

et al. 2014

Self Cite

View full text Add to dashboard Cite

Abstract. This paper is the outcome of a workshop held in Rome in November 2011 on the occasion of the 25th anniversary of the POEM (Physical Oceanography of the Eastern Mediterranean) program. In the workshop discussions, a number of unresolved issues were identified for the physical and biogeochemical properties of the Mediterranean Sea as a whole, i.e., comprising the Western and Eastern sub-basins. Over the successive two years, the related ideas were discussed among the group of scientists who participated in the workshop and who have contributed to the writing of this paper.Three major topics were identified, each of them being the object of a section divided into a number of different subsections, each addressing a specific physical, chemical or biological issue:1. Assessment of basin-wide physical/biochemical properties, of their variability and interactions.2. Relative importance of external forcing functions (wind stress, heat/moisture fluxes, forcing through straits) vs. internal variability.3. Shelf/deep sea interactions and exchanges of physical/biogeochemical properties and how they affect the sub-basin circulation and property distribution.Furthermore, a number of unresolved scientific/methodological issues were also identified and are reported in each sub-section after a short discussion of the present knowledge. They represent the collegial consensus of the scientists contributing to the paper. Naturally, the unresolved issues presented here constitute the choice of the authors and therefore they may not be exhaustive and/or complete. The overall goal is to stimulate a broader interdisciplinary discussion among the scientists of the Mediterranean oceanographic community, leading to enhanced collaborative efforts and exciting future discoveries.

show abstract

“…One potentially important process which has not been included in this budget is the effect of silica cycling processes in coastal areas. Recently it was shown that Si is advected from the shore towards the open sea in the easternmost part of the Mediterranean (Efrati et al, 2013). If silicic acid from diagenesis on the continental shelf is advected from the coastal shelf into the offshore waters, it will represent a new source of silicic acid which will be exported from the basin.…”

Section: Total Silica Budget For the Emsmentioning

confidence: 99%

Silica cycling in the ultra-oligotrophic eastern Mediterranean Sea

2014

Self Cite

View full text Add to dashboard Cite

Abstract. Although silica is a key plant nutrient, there have been few studies aimed at understanding the Si cycle in the eastern Mediterranean Sea (EMS). Here we use a combination of new measurements and literature values to explain the silicic acid distribution across the basin and to calculate a silica budget to identify the key controlling processes. The surface water concentration of ∼ 1 µM, which is unchanging seasonally across the basin, was due to the inflow of western Mediterranean Sea (WMS) water at the Straits of Sicily. It does not change seasonally because there is only a sparse population of diatoms due to the low nutrient (N and P) supply to the photic zone in the EMS. The concentration of silicic acid in the deep water of the western Ionian Sea (6.3 µM) close to the S Adriatic are an of formation was due to the preformed silicic acid (3 µM) plus biogenic silica (BSi) from the dissolution of diatoms from the winter phytoplankton bloom (3.2 µM). The increase of 4.4 µM across the deep water of the EMS was due to silicic acid formed from in situ diagenetic weathering of aluminosilicate minerals fluxing out of the sediment. The major inputs to the EMS are silicic acid and BSi inflowing from the western Mediterranean (121 × 10 9 mol Si yr −1 silicic acid and 16 × 10 9 mol Si yr −1 BSi), silicic acid fluxing from the sediment (54 × 10 9 mol Si yr −1 ) and riverine (27 × 10 9 mol Si yr −1 ) and subterranean groundwater (9.7 × 10 9 mol Si yr −1 ) inputs, with only a minor direct input from dissolution of dust in the water column (1 × 10 9 mol Si yr −1 ). This budget shows the importance of rapidly dissolving BSi and in situ weathering of aluminosilicate minerals as sources of silica to balance the net export of silicic acid at the Straits of Sicily. Future measurements to improve the accuracy of this preliminary budget have been identified.

show abstract

Intrusion of coastal waters into the pelagic eastern Mediterranean: in situ and satellite-based characterization

Cited by 36 publications

References 40 publications

Decoupling atmospheric and oceanic factors affecting aerosol loading over a cluster of mesoscale North Atlantic eddies

Decoupling atmospheric and oceanic factors affecting aerosol loading over a cluster of mesoscale North Atlantic eddies

Physical forcing and physical/biochemical variability of the Mediterranean Sea: a review of unresolved issues and directions for future research

Silica cycling in the ultra-oligotrophic eastern Mediterranean Sea

Contact Info

Product

Resources

About