Fine-sediment mass balance in the western Adriatic continental shelf over a century time scale

Frignani, M.; Langone, Leonardo; Ravaioli, M.; Sorgente, D.; Alvisi, Francesca; Albertazzi, S.

doi:10.1016/j.margeo.2005.06.016

Cited by 132 publications

(123 citation statements)

References 26 publications

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“…Thus, contributions to the fresh water and nutrient inputs in the Adriatic Basin are largely derived from Italian river systems dominated by Po River discharges. The Po is primarily fed by snowmelt in the spring and high runoff in the autumn, particularly in the northern reaches of the watershed (Cattaneo et al, 2003; (Reimer et al, 2004) integrating 14 C reservoir age correction R(t) at 390 ± 85 yr BP (Siani et al, 2000(Siani et al, , 2001 Frignani et al, 2005;Orange et al, 2005;Palinkas and Nittrouer, 2007).…”

Section: Hydrology Of Adriatic Basinmentioning

confidence: 99%

“…Although Apennine rivers have relatively small drainage areas, studies have shown that they have very high sediment contributions relative to their drainage area (Frignani et al, 1992;Milliman and Syvitski, 1992;Alvisi et al, 1996;Bartolini et al, 1996;Sorgente, 1999;Tomadin, 2000). Detrital material in the Po River comes largely from the Alps, supplying illite, associated with chlorite, to the Adriatic Sea (Chamley, 1989;Alonso and Maldonado, 1990;Tomadin, 2000).…”

Section: Clay Mineral Originmentioning

confidence: 99%

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Holocene vegetation and climate changes in the central Mediterranean inferred from a high-resolution marine pollen record (Adriatic Sea)

et al. 2013

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The high-resolution multiproxy study of the Adriatic marine core MD 90-917 provides new insights to reconstruct vegetation and regional climate changes over the southcentral Mediterranean during the Younger Dryas (YD) and Holocene. Pollen records show the rapid forest colonization of the Italian and Balkan borderlands and the gradual installation of the Mediterranean association during the Holocene. Quantitative estimates based on pollen data provide Holocene precipitations and temperatures in the Adriatic Sea using a multi-method approach. Clay mineral ratios from the same core reflect the relative contributions of riverine (illite and smectite) and eolian (kaolinite) contributions to the site, and thus act as an additional proxy with which to evaluate precipitation changes in the Holocene. Vegetation climate reconstructions show the response to the Preboreal oscillation (PBO), most likely driven by changes in temperature and seasonal precipitation, which is linked to increasing river inputs from Adriatic rivers recorded by increase in clay mineral contribution to marine sediments. Pollen-inferred temperature declines during the early-mid Holocene, then increases during the mid-late Holocene, similar to southwestern Mediterranean climatic patterns during the Holocene. Several short vegetation and climatic events appear in the record, indicating the sensitivity of vegetation in the region to millennial-scale variability. Reconstructed summer precipitation shows a regional maximum (170-200 mm) between 8000 and 7000 similar to the general pattern across southern Europe. Two important shifts in vegetation occur at 7700 cal yr BP (calendar years before present) and between 7500 and 7000 cal yr BP and are correlated with increased river inputs around the Adriatic Basin respectively from the northern (7700 event) and from the central Adriatic borderlands (7500-7000 event). During the mid-Holocene, the wet summers lead to permanent moisture all year resulting in a homogeneous seasonal precipitation regime. After 6000 cal yr BP, summer precipitation decreases towards present-day values while winter precipitation rises regularly showing the setting up of Mediterranean climate conditions. Multiproxy evidence from core MD 90-917 provides a deeper understanding of the role of precipitation and particularly the seasonality of precipitation in mediating vegetation change in the central Mediterranean during the Holocene

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Section: Hydrology Of Adriatic Basinmentioning

confidence: 99%

Section: Clay Mineral Originmentioning

confidence: 99%

Holocene vegetation and climate changes in the central Mediterranean inferred from a high-resolution marine pollen record (Adriatic Sea)

et al. 2013

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“…This provides additional constrains for an increased riverine discharge most likely from the Po River around the semi-enclosed Adriatic Basin. However, we cannot discard the influence of distinct inputs from several Apennine rivers (Frignani et al, 2005;Palinkas and Nittrouer, 2006).…”

Section: Centennial-scale Holocene Climate Variabilitymentioning

confidence: 99%

Paleohydrology reconstruction and Holocene climate variability in the South Adriatic Sea

et al. 2013

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Abstract. Holocene paleohydrology reconstruction is derived combining planktonic and benthic stable oxygen and carbon isotopes, sea surface temperatures (SSTs) and oxygen isotope composition of seawater (δ18Ow) from a high sedimentation core collected in the South Adriatic Sea (SAS). Core chronology is based on 10 AMS 14C measures on planktonic foraminifera and tephra layers. Results reveal two contrasted paleohydrological periods that reflect (i) a marked lowering of δ18Ow/salinity during the early to mid-Holocene (11.5 ka to 6.3 ka), including the two-step sapropel S1 deposition, followed during the mid- to upper Holocene by (ii) a prevailing period of increased salinity and enhanced arid conditions in the South Adriatic Basin. Superimposed on these trends, short-term centennial-scale hydrological events punctuated the Holocene period in the SAS. During the early to mid-Holocene, two main SST coolings together with prominent δ18Ow/salinity lowering delineate the sapropel S1 interruption and the post-sapropel phase between 7.3 to 6.3 ka. After 6 ka, centennial-scale δ18Ow and G. bulloides δ13C lowering, mostly centered between 3 to 0.6 ka, reflect short-term hydrological changes related to more intensive runoff of the Po and/or Apennine rivers. These short-term events, even of lesser amplitude compared to the early to mid-Holocene period, may have induced a lowering of sea surface density and consequently reduced and/or inhibited the formation of deep bottom waters in the SAS. Comparison of the emerging centennial- to millennial-scale hydrological record with previous climatic records from the central Mediterranean area and north of the Alps reveal possible synchronicities (within the radiocarbon-dating uncertainty) between phases of lower salinity in the SAS and periods of wetter climatic conditions around the north-central Adriatic Sea. Finally, wavelet analyses provide new clues about the potential origin of climate variability in the SAS, confirming the evidence for a mid-Holocene transition in the central Mediterranean climate and the dominance of a ~1670-yr periodicity after 6 ka, reflecting a plausible connection with the North Atlantic climate system.

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“…Indeed, based on published data for the Goro distributary, Syvistki et al (2005b) estimated a net sediment accumulation along this southern channel, accounting for 16% of the total annual sediment entering the delta. The authors calculated sediment deposition rates for the Goro channel that range from 4.7 to 5.7 cm yr −1 , relatively higher than sedimentation rates measured in most of the prodelta (Frignani et al, 2005). As a result, the Goro channel floor is becoming super-elevated compared to the surrounding delta flood plain (Syvistki et al, 2005b).…”

Section: Low Moderate and High Dischargementioning

confidence: 99%

Influence of distributary channels on sediment and organic matter supply in event-dominated coastal margins: the Po prodelta as a study case

Tesi

Miserocchi²,

Goñi

et al. 2011

Biogeosciences

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Fine-sediment mass balance in the western Adriatic continental shelf over a century time scale

Cited by 132 publications

References 26 publications

Holocene vegetation and climate changes in the central Mediterranean inferred from a high-resolution marine pollen record (Adriatic Sea)

Holocene vegetation and climate changes in the central Mediterranean inferred from a high-resolution marine pollen record (Adriatic Sea)

Paleohydrology reconstruction and Holocene climate variability in the South Adriatic Sea

Influence of distributary channels on sediment and organic matter supply in event-dominated coastal margins: the Po prodelta as a study case

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