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  • 1
    Book
    Book
    Paleolimnology : 4th International Limnogeology Congress, ILIC2007, Barcelona ; [ ... between July 11th and 14th 2007] ... seven papers] (2010)
    Amsterdam [u.a.] : Elsevier
    Details Availability
    Keywords: Konferenzschrift 2007 ; Paläolimnologie
    Type of Medium: Book
    Pages: V, 94 S. , Ill., graph. Darst., Kt.
    Series Statement: Palaeogeography, palaeoclimatology, palaeoecology 294.2010,1/2
    Language: English
    Location Call Number Limitation Availability
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    GEOMAR CATALOGUE
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  • 2
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    Multi-proxy analysis of sediment cores from Lake Azul (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    Publication Date: 2023-11-30
    Description: The Azores archipelago is a group of nine oceanic volcanic islands located in the mid-North Atlantic, roughly 1500 km from Europe and 1900 km from America. Lake Azul located in São Miguel island has a surface area of 4.35 km, 28m of maximum depth and is located at 259m above sea level. A coring campaign was conducted in September 2011 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a Core AZ11_02 (1.70 m long) located in the deep basin of the lake (27m depth). The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Azul in the last 660 years.
    Keywords: Accumulation rate, 5alpha-stigmastan-3beta-ol; Accumulation rate, 5beta-cholestan-3beta-ol; Aerophilous diatoms; Age; AGE; Azores Archipelago; Azul11; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Carbon dioxide, partial pressure, blood, standard error; Chironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology); Chironomini; deep lake; Development of a CCAMLR Marine Protected Area in the Antarctic Weddell Sea; Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.); Diatoms, benthic; Diatoms, planktic; Gas chromatography - Mass spectrometry (GC-MS); GCUWI; Gravity corer, UWITEC; Lake Azul, Azores; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; multiproxy; Nitrogen, total; oceanic island; Orthocladiinae; Tanypodinae; Tanytarsini; WSMPA; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 1471 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    NAO proxy-based reconstruction from Iberian Peninsula (-150 to 2010 CE) (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-13
    Description: We present a quantitative NAO reconstruction for the central Iberian Peninsula (IP) over the last two millennia, along with its uncertainties, by applying a Bayesian approach.
    Keywords: Age; AGE; Bayesian Modeling; CIM12-04A; Common Era; Iberian Central Range, Spain; lake sediments; Modes of Variability; NAO; North Atlantic Oscillation index; Uncertainty
    Type: Dataset
    Format: text/tab-separated-values, 1302 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Multi-proxy analysis of sediment cores from Lake Ginjal (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    Description: The Azores archipelago is a group of nine oceanic volcanic islands located in the mid-North Atlantic, roughly 1500 km from Europe and 1900 km from America. In 2018, a sediment core was recovered from Lake Ginjal on Terceira island. A 3.5 m long sediment core was taken using a Russian chamber corer, 0.5 m long, with 5 cm diameter. Lake Ginjal occupies the bottom of a small crater at 390 m above sea level located in the plains of Achada, the oldest volcanic crater of Terceira island. Its maximum length and width are 120 m and 70 m, respectively, and its maximum water depth is 1 m. The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Azul in the last 550 years.
    Keywords: Accumulation rate, coprophilous fungi spores; Aerophilous diatoms; Age; AGE; AMS 14C dating on pollen concentrates; Clam routine on R; Arboreal pollen; Azores Archipelago; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Carbon dioxide, partial pressure, blood, standard error; Charcoal, flux; Charcoal analysis (Whitlock & Larsen, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); Chironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology); Chironomini; Coccoliths, standard deviation; Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.); Diatoms, benthic; Diatoms, planktic; Ginjal_2018; Lake Ginjal, Terceira Island; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; multiproxy; Nitrogen, total; oceanic island; Orthocladiinae; Pollen, herbs; Pollen, shrubs; Pollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); RUSC; Russian corer; Shallow lake; Tanytarsini; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 1058 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Multi-proxy analysis of sediment cores from Lake Caldeirão (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    Description: The Azores archipelago is a group of nine oceanic volcanic islands located in the mid-North Atlantic, roughly 1500 km from Europe and 1900 km from America. Lake Caldeirão is situated in the central caldeira of Corvo Island at 399 m altitude. A coring campaign was conducted in June 2017 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a core (4.60 m long) located in the deepest part of the lake. The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Caldeirão in the last 1500 years
    Keywords: Accumulation rate, coprophilous fungi spores; Accumulation rate, macrophytes seeds; Accumulation rate, polycyclic aromatic hydrocarbons; Aerophilous diatoms; Age; AGE; AMS 14C dating on pollen concentrates; Clam routine on R; Arboreal pollen; Caldeirao_2017; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Carbon dioxide, partial pressure, blood, standard error; Charcoal, flux; Charcoal as a Fire Proxy (Whitlock, 2005, in Smol et al, Tracking Environmental Change Using Lake Sediments Terrestrial, Algal, and Siliceous Indicators); Chironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology); Chironomini; Chromatography; Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.); Diatoms, benthic; Diatoms, planktic; GCUWI; Gravity corer, UWITEC; Juniperus; Lake Caldeirão, Azores; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; Monostichoplana filum; Nitrogen, total; Orthocladiinae; Plant Macrofossils (Birks, 2005, in Smol et al, Tracking Environmental Change Using Lake Sediments Terrestrial, Algal, and Siliceous Indicators); Pollen, herbs; Pollen, shrubs; Pollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); Tanypodinae; Tanytarsini; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 1104 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Multi-proxy analysis of sediment cores from Lake Funda (Azores archipelago, Portugal) (2021)
    PANGAEA
    Details
    Publication Date: 2024-01-27
    Description: The Azores archipelago is a group of nine oceanic volcanic islands located in the mid-North Atlantic, roughly 1500 km from Europe and 1900 km from America. Lake Funda is situated in the southern sector of the central plateau of Flores Island at 351 m altitude and occupies the bottom of a small maar-explosion crater with 875 m in length and 625 m width, with a total area of 0.37 km2 where several water lines converge. A coring campaign was conducted in June 2017 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a core (9.97 m long) located in the deepest part of the lake. The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Azul in the last 1300 years.,
    Keywords: Accumulation rate, 5alpha-stigmastan-3beta-ol; Accumulation rate, 5beta-cholestan-3beta-ol; Accumulation rate, coprophilous fungi spores; Accumulation rate, macrophytes seeds; Aerophilous diatoms; Age; AGE; AMS 14C dating on pollen concentrates; Clam routine on R; Arboreal pollen; Azores Archipelago; Carbon, organic, total; Carbon, organic, total/Nitrogen, total ratio; Carbon dioxide, partial pressure, blood, standard error; Charcoal, flux; Charcoal analysis (Whitlock & Larsen, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); Chironomid analysis (Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology); Chironomini; Chromatography; Coccoliths, standard deviation; deep lake; Diatom analysis (Battarbee, 1986, in Berglund, Handbook of Holocene Pal.); Diatoms, benthic; Diatoms, planktic; Funda_2017; GCUWI; Gravity corer, UWITEC; Lake Funda, Flores Island, Azores; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; multiproxy; Nitrogen, total; oceanic island; Orthocladiinae; Pollen, herbs; Pollen, shrubs; Pollen analysis (Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments); Tanypodinae; Tanytarsini; δ13C; δ15N
    Type: Dataset
    Format: text/tab-separated-values, 1202 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Organic geochemical analysis of sediment cores from Lake Funda (Azores Archipelago, Portugal) (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-23
    Description: To evaluate changes in terrestrial and aquatic ecosystems in the Azores, we developed paleoecological and paleoclimate records from Lake Funda on Flores Island that span the last millennium. Vegetation composition (n-alkane average chain length) indicate when human activities began in the catchment area and biogenic silica tracks changes in diatom productivity. In addition, sterol hydrogenation and archaeal lipids (isoprenoid glycerol dialkyl glycerol tetraethers) trace changes in redox conditions and biogeochemical cycles, respectively. Finally, a high-resolution reconstruction using leaf wax hydrogen isotopes records changes in precipitation amount over the last millennium.
    Keywords: Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Age; AGE; Agilent 6890N gas chromatography (GC) system and a flame ionization detector (FID); Agilent 7890B gas chromatography (GC) with an Agilent 5977B quadrupole mass spectrometer (MS); AMS 14C dating on pollen concentrates; Clam routine on R; Atmospheric Pressure Chemical Ionization/High Performance Liquid Chromatography-Mass Spectrometer (APCI/HPLC-MS); Auto Analyzer Technicon AAII; beta-Sitosterol, flux; biogenic silica; C16-Fatty acid methyl esters, fractional abundance; C18-Fatty acid methyl esters, fractional abundance; C20-Fatty acid methyl esters, fractional abundance; C22-Fatty acid methyl esters, fractional abundance; C22-fatty acid methyl esters, δD; C22-fatty acid methyl esters, δD, standard deviation; C24-Fatty acid methyl esters, fractional abundance; C26-Fatty acid methyl esters, fractional abundance; C28-Fatty acid methyl esters, fractional abundance; C28-fatty acid methyl esters, δD; C28-fatty acid methyl esters, δD, standard deviation; C30-Fatty acid methyl esters, fractional abundance; C30-fatty acid methyl esters, δD; C30-fatty acid methyl esters, δD, standard deviation; C32-Fatty acid methyl esters, fractional abundance; Campestanol, flux; Campesterol, flux; Cholestanol, flux; Cholesterol, flux; Comment; Crenarchaeol, fractional abundance; Crenarchaeol isomer, fractional abundance; DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Epi-coprostanol flux; Funda_2017; Gas Chromatograph (GC), Manufacturer unknown, custom built; coupled with Isotope Ratio Mass Spectrometer (IRMS), Thermo Scientific, Delta V Plus; GCUWI; GDGTs; Gravity corer, UWITEC; hydrogen isotope; Lake Funda, Flores Island, Azores; lake sediment proxies; leaf waxes; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; n-Alkane C21, fractional abundance; n-Alkane C23, fractional abundance; n-Alkane C25, fractional abundance; n-Alkane C27, fractional abundance; n-Alkane C29, fractional abundance; n-Alkane C31, fractional abundance; n-Alkane C33, fractional abundance; Silicon; Silicon dioxide; sterols; Stigmastanol, flux; Stigmasterol, flux; Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance
    Type: Dataset
    Format: text/tab-separated-values, 2362 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Unraveling the Holocene Eruptive History of Flores Island (Azores) Through the Analysis of Lacustrine Sedimentary Records (2021)
    Frontiers
    Details
    Publication Date: 2024-02-07
    Description: Lacustrine sequences from active volcanic settings usually hold a rich and continuous record of tephra layers, providing a critical source of information to reconstruct a most complete eruptive history of a region. Lake sedimentary records on volcanic islands are particularly useful as the typical small size of these islands and their steep subaerial and submarine slopes lead to a lower preservation of potential erodible pyroclastic deposits. Here we explore the lacustrine sedimentary record of Lagoa da Lomba, a crater lake in the central upland area of Flores Island (Azores), to gain insight into the recent eruptive history of this island. The strategic location of Lagoa da Lomba, half distance between the two clusters of recent volcanic activity of the island, together with its long-lasting record, back to 23.52 cal kyr BP, makes this lake a privileged site to investigate the Holocene volcanic history of Flores. Based on a detailed stratigraphic characterization of sediments from a lake transect of three cores, supported by glass shard geochemistry and radiocarbon dating, we recognized four Holocene eruptive events taking place between 6.28 and 2.36 cal kyr BP, demonstrating that the Holocene volcanic activity at Flores Island may have lasted longer than previously reported. Glass shard geochemistry from the different tephra layers suggests three populations, basaltic to trachybasaltic in composition, where the last eruption is the least evolved endmember. Two of the four eruptive events correlate with subaerially-exposed pyroclastic sequences, in terms of stratigraphy and geochemistry. The most recent event recorded at Lagoa da Lomba was constrained to 3.66 – 2.36 cal kyr BP and linked to an eruption sourced from Lagoa Comprida Volcanic System. The second most recent eruptive event was sourced from Lagoa Funda Volcanic System and dated at 3.66 cal kyr BP. Our observations show that Flores experienced vigorous volcanic activity during the Late Holocene. Therefore, contrary to what is assumed, the possibility of future eruptions should be properly considered, and the volcanic hazard here should not be underestimated. Moreover, we highlight the importance of tephrostratigraphy in recent lake sediments to reconstruct past volcanic activity, especially at small volcanic islands, such as Flores, where exposure is poor due to erosion within the limited subaerial area and the dense vegetation.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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