Eduardo Leorri

East Carolina University | ECU · Department of Geological Sciences

Coastal systems are especially vulnerable to human activities resulting from a range of direct physical modifications of the ecosystems to the biological, chemical, and physical impacts of pollutants. For the most recent decades, these modifications can be accurately tracked by industrial development indicators, providing an exceptional record of h...

The far-reaching impact of the Sun on Earth’s climate and people’s health and well-being is not consensual or fully understood, with empirical literature stressing the need to expand our knowledge of such relationships. Here, the interplay between solar activity (SA), climate and its cascading effects on all-cause mortality were examined at several...

link to a free copy https://authors.elsevier.com/c/1cvFz5mVdoZlC The alternating submergence and subaerial exposure of the low-gradient, shallow Sunda Shelf of southeast Asia during Quaternary interglacial-glacial cycles played an important role in ocean circulation and monsoonal climate through the interchange of Indian Ocean and Pacific Ocean wa...

At the very end of the 20th century I was working on my PhD project that included getting (knee) deep into the mud of the Bilbao Estuary (Northern Spain) to understand the environmental evolution of this dramatically altered system by anthropogenic activities. Almost concomitantly, a new term to describe the period during which humans have become m...

Pamlico Sound, a large back‐barrier estuary in North Carolina, is under threat of climate change due to increased storm activity and sea level rise. The response of this system is investigated by considering what has already happened during changes in sea level over the late Holocene epoch. The hydrodynamic changes that occurred in response to geom...

El registro sedimentario depositado durante los últimos siglos en las marismas de la Ría de Plentzia permite reconstruir los procesos más importantes que han operado ahí a través del tiempo y que responden tanto a factores locales (ocupación humana de estas marismas con fines agrícolas) como de carácter global (variaciones en el nivel marino como c...

A paleoclimatic reconstruction for the west coast of Portugal spanning the last six centuries is presented. This is based on the foraminiferal records of two dated sediment cores retrieved from the high marsh settings of Casa Branca (southwest coast, Mira estuary) and Caminha (northwest coast, Minho estuary), and supported by geochemical-sedimentol...

find the full paper at https://authors.elsevier.com/a/1Wo16B8ccgX~R The age and ability of salt marshes to accumulate and sequester carbon is often assessed using the carbon isotopic signatures (Δ14C and δ13C) of sedimentary organic matter. However, transfers of allochthonous refractory carbon (CRF) from the watershed to marshes would not represen...

This work presents two novel climate-related time series for the northwest of Portugal. The first is an A.D. 1626–1820 triennial-resolved wine production series, based on the Benedictine accounts from six monasteries of the Entre-Douro-e-Minho (EDM) region. The second, an A.D. 1654–2010 benthic foraminiferal record from the Caminha salt marsh, loca...

Barrier islands and associated back-barrier estuaries and lagoons interact via hydrodynamic and sedimentary processes, affecting the evolution of both systems. Understanding coupled dynamic processes between both systems is vital to forecasts of future coastal morphologic and hydrodynamic changes in response to such factors as sea-level rise and st...

http://www.sociedadgeologica.es/archivos/GEO_TEMAS/Geo_temas17.pdf

To test whether low latitude shallow shelf deposits can provide high resolution paleoclimatic records, we utilized two cores from the Holocene sedimentary fill of incised valleys on the Sunda Shelf off Sarawak, Malaysia. We developed a new sea surface temperature (SST) record based on planktonic foraminiferal Mg/Ca for the last 7200 years. This rec...

Level 4 of the cave of Pico Ramos (Muskiz, Bizkaia) is a shell midden occupied by the humans who visited the cave during the 6th and 5th millennium cal BC. This volumen includes the following studies: excavation, stratigraphy, chronology and materials; Holocene sea-level; vegetation, use of fuelwood and agriculture; identification and exploitation...

We produced ∼3000-year long relative sea-level (RSL) histories for two sites in North Carolina (USA) using foraminifera preserved in new and existing cores of dated salt-marsh sediment. At Cedar Island, RSL rose by ∼2.4 m during the past ∼3000 years compared to ∼3.3 m at Roanoke Island. This spatial difference arises primarily from differential GIA...

A hydro-climatic reconstruction is proposed for the Minho region (NW Portugal), integrating two different proxies: grape harvest dates (GHD) as a proxy of temperature variations, and benthic marsh foraminifera as a proxy of salinity of sediment interstitial waters. The reconstructed and measured mean maximum temperatures (GSTmax) of grapevine-growi...

The uncertainties surrounding present and future sea-level rise have revived the debate around sea-level changes through the deglaciation and mid- to late Holocene, from which arises a need for high-quality reconstructions of regional sea level. Here, we explore the stratigraphy of a sandy barrier to identify the best sea-level indicators and provi...

This study examines the Holocene stratigraphic record and paleoenvironmental evolution of a large estuarine system, at high temporal and spatial resolution, in the context of changing climate, sea level, and hydrodynamics. New data are used to examine two time periods of increased marine influence within Pamlico Sound in northeastern North Carolina...

A multi-proxy approach based on benthic foraminifera, sand content, short-lived radioisotope activities, heavy metal concentrations and aerial photography was developed to characterise the process of human disturbance on the intensely impacted eastern Cantabrian coast (N. Spain) over the last two centuries. Analysis of two 50 cm long sediment cores...

Two marine gravity cores from ~60 m water depth were collected from the western Sunda Shelf (southern South China Sea) to characterize Quaternary paleoenvironments. The cores were dated to the current and previous interglacial periods. Cores, TER15-GC11B and TER15-GC8A, located ~40 km and ~90 km offshore of Kuala Terengganu, peninsular Malaysia, ar...

The Sunda Shelf of the southern South China Sea, Southeast Asia, is one of the largest shelf seas in the western Pacific. Studying the Holocene sedimentological record of this region can provide insights into paleoclimatic changes related to the East Asian monsoon (EAM). Understanding the EAM and its control on precipitation, continental run-off, n...

The Strait of Malacca, a narrow passage of water between Sumatra and peninsular Malaysia, contains relatively thick (several m), fine grained sediment immediately off the west coast of Kedah, Malaysia that might contain a record of Holocene paleoclimate. To investigate this possibility, we sampled a core taken from 12.6 m water depth between Langka...

The sea bed of the Malacca Strait off the coast of Kedah, northwestern peninsular Malaysia is characterized by several meters of Holocene mud that potentially preserve a record of Holocene paleoenvironmental/paleoclimatic change. In 2001, a piston core was taken at 15.80 m water depth between Langkawi Island and the Malaysian mainland. The core was...

Sediments of the Sunda Shelf (South China Sea), off northeast peninsular Malaysia, potentially preserve a record of Holocene environmental changes, including climate change. In the summer of 2014, two ca. 2 m gravity cores were collected on the Sunda Shelf in 60 m of water ca. 52 km from the mouth of the Terengganu River. Both cores were sampled in...

The local and regional newspaper records of grape harvest dates (GHDs) in the Minho region (NW Portugal) as well as the Ponte de Lima Wine Producers Cooperative (1978-2012) minutes of meetings were used to reconstruct the March-August maxima temperature (GSTmax) between 1856 and 2009. GSTmax were combined with benthic foraminiferal assemblages data...

A numerical model was used to simulate water levels, currents, waves, suspended sediment and salinity distributions in Pamlico Sound, a large and shallow back-barrier estuary in eastern North Carolina, for four distinct time slices during its geomorphic evolution over the late Holocene. Present-day bathymetry was obtained from a high resolution dig...

The East Asian monsoon (EAM) system affects precipitation and continental runoff into the shallow waters of the Sunda Shelf (South China Sea). Given the importance of the EAM to agricultural activities in SE Asia, it is important to understand past changes in the strength of the monsoon so that the range of future changes can be understood. Paleocl...

The East Asian Monsoon (EAM) dominates the climate of the South China Sea (SCS) and the adjacent Southeast Asian mainland, directly affecting Asia’s seasonal patterns of precipitation, runoff, and nutrient transport. Changes in the strength of the EAM system can lead to droughts and flooding events that can negatively impact economic growth and env...

The East Asian Monsoon (EAM) delivers vital rainfall to heavily populated, agriculturally dependent regions in Southeast Asia. Changes in EAM strength and duration influence precipitation and wind patterns, continental runoff, sea circulation, and nutrient transport in the South China Sea (SCS) and surrounding terrain. The SCS has been the focus of...

Sea-level reconstructions based on foraminiferal assemblage data are common for temperate salt-marsh settings. In comparison, the widespread mangrove swamps of equatorial to subtropical settings have received considerably less attention due to enhanced taphonomic loss of specimens, extensive bioturbation, abundant infaunal foraminifera and irregula...

Foraminifera, grain size, and carbon and nitrogen isotope ratios and abundances were analyzed in surface-sediment samples collected from three floating fish-cage complexes to address how aquaculture has influenced the Setiu estuary and lagoon of northeast peninsular Malaysia. Two currently active floating fish-cage complexes, SET11-S43 and SET11-S4...

A range of chemostratigraphic and lithostratigraphic markers of human impacts can be recorded in four estuaries located in the eastern Cantabrian coast (northern Spain). Metal-enriched levels and stable Pb isotopic ratios in dated sediment cores allowed the recognition of an ancient local episode of Pb contamination associated with mining activitie...

Moran, K.L.; Mallinson, D.J.; Culver, S.J.; Leorri, E., and Mulligan, R.P., 2015. Late Holocene evolution of Currituck Sound, North Carolina, USA: Environmental change driven by sea-level rise, storms, and barrier island morphology. The Holocene evolution of Currituck Sound, North Carolina, is investigated using geological data and a hydrodynamic m...

In order to reconstruct the environmental evolution process of the Urdaibai estuary in response to sea-level changes in the Basque coast (northern Spain, Bay of Biscay) during the last 8500 years, 10 boreholes were drilled in different estuarine areas using a rotary drill until the pre-Quaternary basement was reached. One manual short core (50 cm)...

The mid to late Holocene coastal evolution of the Setiu estuary/lagoon (northeast peninsular Malaysia) has been studied using a multidisciplinary/multiproxy approach including sedimentologic, geomorphologic, and ground penetrating radar (GPR) data combined with optically stimulated luminescence (OSL), radiocarbon and Pb-210 age estimates to provide...

A high-resolution study of a marsh sedimentary sequence from the Minho estuary provides a new palaeoenvironmental reconstruction from NW Iberian based on geological proxies supported by historical and instrumental climatic records. A low salinity tidal flat, dominated by Trochamminita salsa, Haplophragmoides spp. and Cribrostomoides spp., prevailed...

Foraminifera, sediment grain-size, and carbon and nitrogen isotope ratios and abundances were analyzed in surface sediment samples collected from three floating fish cage complexes to address how aquaculture has influenced the Setiu estuary and lagoon of northeast peninsular Malaysia. Two currently active floating fish cage complexes, SET11-S43 and...

«Antropozenoa» esaten zaio informalki giza jarduerek Lurreko dinamikari eskala orokorrean eragin dioten denbora tarteari. Unitate geokronologiko formal modura onartua izateko, bere hasiera finkatzeaz gain markatzaile estratigrafiko egokiak zehaztu beharra dago. Lan honek Antropozenoa definitzeko lagungarriak izan daitezkeen hainbat iritzi zientifik...

The East Asian Monsoon (EAM), driven by differential heating between the continent and adjacent ocean, is a critical element of global atmospheric circulation and strongly influences wind patterns, precipitation, sea circulation, continental runoff, and nutrient transport to the South China Sea and surrounding land regions. Changes in EAM strength...

The distribution and abundance of live (rose Bengalstained) and dead infaunal foraminifera have been documented in short cores taken at four locations representing a narrow range of salinity settings in the mangrove swamps of the Setiu wetland, Terengganu, peninsular Malaysia. Cores were taken at mud-rich sites, two in the mid-swamp and two in the...

Short sediment cores taken from (i) a recently regenerated salt marsh (Plentzia estuary), (ii) an incipient marsh and (iii) a pristine marsh (Urdaibai estuary), have been interpreted for evidence of environmental impacts and sea-level change on the basis of microfaunal and geochemical determinations and historical land management data. Under the cu...

The absence of accurate sea-level index points in SW Europe has long precluded the development of Holocene sea-level curves and the correct understanding of tectonic activity. In order to understand the coastal evolution and the major drivers in the Minho area, Portugal, we have combined micropaleontological and sedimentological data, where the chr...

Short sediment cores (up to 44cm long) taken from salt marshes regenerated during the last 60years in the Urdaibai Biosphere Reserve have been interpreted on the basis of microfaunal and geochemical determinations and historical data. Agricultural soils in the middle and upper estuary reaches were abandoned during the 1950s and entrance of estuarin...

Foraminiferal assemblages of Caminha tidal marshes have been studied since 2002 revealing a peculiar dominance of brackish species, such as Haplophragmoides manilaensis, Haplophragmoides wilberti, Haplophragmoides sp., Pseudothurammina limnetis and Trochamminita salsa/irregularis in the high marshes of the Minho and the Coura lower estuaries. The a...

Foraminiferal assemblages of Caminha tidal marshes have been studied since 2002, revealing a peculiar dominance of brackish species like Haplophragmoides manilaensis, Haplophragmoides sp., Pseudothurammina limnetis and Trochamminita salsa / irregularis in the high marshes of the Minho and the Coura lower estuaries. The assemblage composition reflec...

A study to assess the relationship between the record of high-marsh benthic foraminifera and the instrumental data of river flow and precipitation was undertaken in the Minho region since 1934. River flow has a positive correlation (0.72<R<0.85) with precipitation which longer record is more suitable to be applied to the interpretation of foraminif...

a b s t r a c t Environmental changes during the last 2 millennia in the Minho River tidal marsh (NW Portugal–Spain border) were reconstructed. Changes in the sources of organic matter (OM) delivered to the marsh were evaluated from elemental, isotopic and molecular composition using a 1 m sediment core. Carbon isoto-pic composition (d 13 C) and or...

The Setiu wetland of peninsular Malaysia is threatened by expansion of aquaculture. Water quality of the estuarylagoon complex is becoming affected by nutrients introduced into the system at floating fish cages and by the clear-cutting of large areas of fringing mangrove forest for the creation of land-based fish and shrimp pens. We report here on...

The absence of basal peat in the stratigraphic sequences of the southern Bay of Biscay has long precluded the development of Holocene sea-level curves. We have approached this problem by combining the indicative depositional meaning (derived from the micropalaeontological composition and sand content) with radiocarbon ages of 55 borehole samples ob...

El estudio de las marismas naturales y regeneradas puede aportar información clave sobre las tendencias futuras de la evolución costera, particularmente bajo el escenario climático actual de calentamiento global y ascenso acelerado del nivel marino. Se ha desarrollado una función de trasferencia basada en foraminíferos que se ha aplicado a un sonde...

Tidal amplitude and currents along coastlines will change in conjunction with sea-level rise, when certain geomorphic and bathymetric conditions are met. Under conditions of decreasing protection from barrier islands, associated with increased inlet activity or overstepping of islands, tidal amplitude can rapidly increase in estuaries and along mai...

Foraminiferal assemblages preserved within salt-marsh sediment can provide an accurate and precise means to reconstruct relative sea level due to a strong relationship with elevation, which can be quantified using a transfer function. We collected a set of surface samples from two salt marshes in the Morbihan Golfe, France to determine foraminifera...

We assessed the performance of a transfer function model for sea-level studies using salt-marsh foraminifera from two estuaries of northern Portugal. An independent data set of 12 samples and 13 sub-fossil samples from a core were used to evaluate if reconstructions and errors derived from current models are adequate. Initial transfer function mode...

Understanding the dynamics of salt marshes is key under the current climatic scenario. With this objective we took 50-cm long sediment cores from recently regenerated salt marshes in the southern Bay of Biscay. These cores were analyzed using microfaunal and geochemical proxies and the results were integrated with historical data. Agricultural soil...

The Outer Banks barrier islands and adjacent estuarine system of North Carolina contain a geologic record which demonstrates that rapid coastal reorganization has occurred in the past. Rapid reorganization is likely the result of a combination of changing sea level, variations in storm patterns, and threshold-crossing accompanied by positive feedba...

Coastal evolution is an increasingly important area of study, especially with the projected rise in sea level, increase in storm intensity, and population increases along the nation’s coasts. In order to predict how the coastal environment will respond to these changes detailed studies of the Holocene evolution of coastal systems are extremely impo...

The process of saltmarsh natural regeneration in the Basque coast is studied on the basis of microfaunal and geochemical determinations and historical data. After the abandonment of agricultural soils in estuarine areas during the 20th century, the entrance of brackish water rapidly transformed theses areas with deposition of increasing amounts of...

In order to study the sea-level change process in the eastern Cantabrian coast during the last 8500 years based on the information registered in the coastal sedimentary sequences, 7 boreholes were drilled using a rotary drill until the pre-Quaternary basement was reached and 2 manual cores were obtained from different estuarine areas in the Urdaiba...