Néjib Kallel
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View article: Understanding the moisture source of orbitally controlled changes in northern Sahara rainfall: a multi-proxy speleothem approach
Understanding the moisture source of orbitally controlled changes in northern Sahara rainfall: a multi-proxy speleothem approach Open
The Sahara, the largest hot desert in the world, has witnessed green, humid phases in the past. It is clear that large areas of what is now arid/hyper-arid desert became vegetated, that currently fossil rivers flowed sufficiently to reach …
View article: Stable isotopes and palaeo-hydrological implications of Tunisian laminar calcretes during the late Pliocene - early Pleistocene
Stable isotopes and palaeo-hydrological implications of Tunisian laminar calcretes during the late Pliocene - early Pleistocene Open
During the late Pliocene-early Pleistocene Tunisian calcretes were formed in a soil environment. Fabrics at the macro and micro scale show that these deposits are similar to rhizogenic modern analogue systems forming in Spain. We infer tha…
View article: Palaeo-environmental and palaeo-climatic significance of Tunisian calcretes 
Palaeo-environmental and palaeo-climatic significance of Tunisian calcretes  Open
<p>Continental carbonates constitute an interesting topic of study since they are important archives recording climate and paleoenvironmental changes. In Tunisia, calcretes are formed during the Pliocene-early Pleistocene (Villafranc…
View article: Review article: Extreme marine events revealed by lagoonal sedimentary records in Ghar El Melh during the last 2500 years in the northeast of Tunisia
Review article: Extreme marine events revealed by lagoonal sedimentary records in Ghar El Melh during the last 2500 years in the northeast of Tunisia Open
The Tunisian coast has been affected in the past by many events of extreme marine submersion (storms and tsunamis). A high-resolution study along two sediment cores taken from the lagoon of Ghar El Meleh was performed to identify the diffe…
View article: Extreme marine events revealed by lagoonal sedimentary records inGhar el Melh during the last 2500 years in the northeast of Tunisia
Extreme marine events revealed by lagoonal sedimentary records inGhar el Melh during the last 2500 years in the northeast of Tunisia Open
The Tunisian coast has been affected in the past by many events of extreme marine submersion (storms and tsunamis). A high-resolution study along two sediment cores GEM3 and GEM4 taken from the lagoon of the Ghar el Melh was performed to i…
View article: Changes in Intermediate Circulation in the Bay of Bengal Since the Last Glacial Maximum as Inferred From Benthic Foraminifera Assemblages and Geochemical Proxies
Changes in Intermediate Circulation in the Bay of Bengal Since the Last Glacial Maximum as Inferred From Benthic Foraminifera Assemblages and Geochemical Proxies Open
Benthic foraminiferal assemblages and geochemical tracers (δ 18 O, δ 13 C and 14 C) have been analyzed on benthic and planktonic foraminifera from core MD77‐176, located in the northern Bay of Bengal, in order to reconstruct the evolution …
View article: Extreme flood event reconstruction spanning the last century in the El Bibane Lagoon (southeastern Tunisia): a multi-proxy approach
Extreme flood event reconstruction spanning the last century in the El Bibane Lagoon (southeastern Tunisia): a multi-proxy approach Open
Climate models project that rising atmospheric carbon dioxide concentrations will increase the frequency and the severity of some extreme weather events. The flood events represent a major risk for populations and infrastructures settled o…
View article: Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals
Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals Open
We present the neodymium isotopic composition (εNd) of mixed planktonic foraminifera species from a sediment core collected at 622 m water depth in the Balearic Sea, as well as εNd of scleractinian cold-water corals (CWC; Madrepora oculata…
View article: High-resolution Holocene climate and hydrological variability from two major Mediterranean deltas (Nile and Rhone)
High-resolution Holocene climate and hydrological variability from two major Mediterranean deltas (Nile and Rhone) Open
High-resolution records of sea surface temperatures (SSTs) and terrestrial n-alkanes (TERR-alkanes) combined with pollen from the same sedimentary sequences were generated to assess variations in the Nile River discharge over the Holocene.…
View article: (Figure 2) Annual precipitation of the Medenine and Tataouine meteorological stations during the period between 1900 and 2000
(Figure 2) Annual precipitation of the Medenine and Tataouine meteorological stations during the period between 1900 and 2000 Open
(Figure 2) Annual precipitation of the Medenine and Tataouine meteorological stations during the period between 1900 and 2000
View article: (Table 3) AMS 14C ages of samples of the planktonic foraminifer G. bulloides from "off-mound" sediment core SU92-33
(Table 3) AMS 14C ages of samples of the planktonic foraminifer G. bulloides from "off-mound" sediment core SU92-33 Open
The AMS 14C ages were corrected for 13C and a mean reservoir age of 400 years, and were converted into calendar years using the INTCAL13 calibration data set (Reimer et al., 2013) and the CALIB 7.0 program (Struiver et al., 2005).
View article: (Figure 12) Element ratios and silt/clay size fraction of core BL12-10 from the El Bibane Lagoon, Tunisia
(Figure 12) Element ratios and silt/clay size fraction of core BL12-10 from the El Bibane Lagoon, Tunisia Open
(Figure 12) Element ratios and silt/clay size fraction of core BL12-10 from the El Bibane Lagoon, Tunisia
View article: (Table 4) Multiproxy data obtained for the upper 2.1m of sediment core SU92-33 (Balearic Sea)
(Table 4) Multiproxy data obtained for the upper 2.1m of sediment core SU92-33 (Balearic Sea) Open
Stable oxygen and carbon isotopes were measured on benthic (C. pachyderma) and planktonic (G. bulloides) foraminifera; epsilon-Nd values were obtained on mixed planktonic foraminifera samples. The age results from a combination of seven AM…
View article: Neodymium isotopic composition of mixed planktonic foraminifera species and epsilon-Nd of scleractinian cold-water corals
Neodymium isotopic composition of mixed planktonic foraminifera species and epsilon-Nd of scleractinian cold-water corals Open
We present the neodymium isotopic composition (epsilon-Nd) of mixed planktonic foraminifera species from a sediment core collected at 622 m water depth in the Balearic Sea, as well as epsilon-Nd of scleractinian cold-water corals (CWC; Mad…
View article: (Figure 9) Iron/Calcium and Titanium/Calcium ratios of the investigated surface samples from the watershed and the El Bibane Lagoon, Tunisia
(Figure 9) Iron/Calcium and Titanium/Calcium ratios of the investigated surface samples from the watershed and the El Bibane Lagoon, Tunisia Open
(Figure 9) Iron/Calcium and Titanium/Calcium ratios of the investigated surface samples from the watershed and the El Bibane Lagoon, Tunisia
View article: Grain size and geochemical analysis in the El Bibane Lagoon and the Fessi River watershed (Southeast of Tunisia)
Grain size and geochemical analysis in the El Bibane Lagoon and the Fessi River watershed (Southeast of Tunisia) Open
Climate models project that rising atmospheric carbon dioxide concentrations will increase the frequency and the severity of some extreme weather events. The floods events represent a major risk for populations and infrastructures settled …
View article: (Table 1) U-series ages and epsilon-Nd values obtained for cold-water coral samples collected from sediment core RECORD 23 (Sardinia Channel)
(Table 1) U-series ages and epsilon-Nd values obtained for cold-water coral samples collected from sediment core RECORD 23 (Sardinia Channel) Open
(Table 1) U-series ages and epsilon-Nd values obtained for cold-water coral samples collected from sediment core RECORD 23 (Sardinia Channel)
View article: (Table 2) epsilon-Nd values obtained for cold-water corals from the southern Alboran Sea
(Table 2) epsilon-Nd values obtained for cold-water corals from the southern Alboran Sea Open
The AMS 14C ages published by Fink et al. (2013) are also reported as median probability age (ka BP).
View article: Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals
Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals Open
The neodymium isotopic composition (εNd) of mixed planktonic foraminifera species and scleractinian cold-water corals (CWC; Madrepora oculata, Lophelia pertusa) collected at 280–620 m water depth in the Balearic Sea, the Alboran Sea and th…
View article: Environmental changes, climate and anthropogenic impact in south-east Tunisia during the last 8 kyr
Environmental changes, climate and anthropogenic impact in south-east Tunisia during the last 8 kyr Open
Pollen and clay mineralogical analyses of a Holocene sequence from Sebkha Boujmel (southern Tunisia) trace the climatic and environmental dynamics in the lower arid bioclimatic zone over the last 8000 years. During the mid- to late Holocen…