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  • 175-1075A; 175-1079A; 175-1082A; 175-1084A; Accumulation rate, calcium carbonate; Accumulation rate, n-Alkanes; Accumulation rate, n-alkanol; Accumulation rate, total organic carbon; Age model; Angola Basin; Benguela Current, South Atlantic Ocean; Calculated, see reference(s); Carbon Preference Index, n-Alkanes (C27-C33); Carbon Preference Index, n-Alkanols; Center for Marine Environmental Sciences; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Event label; GeoB1008-3; GeoB1016-3; GeoB1028-5; GeoB1710-3; GeoB1722-1; Gravity corer (Kiel type); Higher Plant Alkanes index; Joides Resolution; Latitude of event; Leg175; Longitude of event; M20/2; M6/6; MARUM; Meteor (1986); n-Alkane, average chain length; n-Alkanol average chain length; Namibia continental slope; Ocean Drilling Program; ODP; Sea surface temperature, annual mean; see reference(s); SL; Walvis Ridge, Southeast Atlantic Ocean  (4)
  • 175-1075A; 175-1079A; 175-1082A; 175-1084A; Age model; Angola Basin; Benguela Current, South Atlantic Ocean; Calculated, see reference(s); Center for Marine Environmental Sciences; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Event label; GeoB1008-3; GeoB1016-3; GeoB1028-5; GeoB1710-3; GeoB1722-1; Gravity corer (Kiel type); Joides Resolution; Latitude of event; Leg175; Longitude of event; M20/2; M6/6; MARUM; Mass spectrometer Finnigan MAT 252; Meteor (1986); n-Alkane C27, δ13C; n-Alkane C29, δ13C; n-Alkane C31, δ13C; n-Alkane C33, δ13C; n-Alkane C4 plant; n-Alkane C weighted mean average, δ13C; n-Alkanol C22, δ13C; n-Alkanol C24, δ13C; n-Alkanol C26, δ13C; n-Alkanol C28, δ13C; n-Alkanol C30, δ13C; n-Alkanol C32, δ13C; n-Alkanol C4 plant; n-Alkanol C weighted mean average, δ13C; Namibia continental slope; Ocean Drilling Program; ODP; see reference(s); SL; Walvis Ridge, Southeast Atlantic Ocean; δ13C, organic carbon  (4)
  • 175-1078C; Benguela Current, South Atlantic Ocean; DRILL; Drilling/drill rig; Joides Resolution; Leg175; Ocean Drilling Program; ODP  (3)
  • Marine palynology  (2)
  • 056-4; Acacia; Acanthaceae; AGE; Alchornea; AMADEUS; Amaranthaceae/Chenopodiaceae; Ambrosia; Anacardiaceae; Arecaceae; Artemisia; Asteroideae; Bertiera-type; Borreria; Boscia-type; Burseraceae; Caesalpiniaceae; Cassia-type; Celtis; Center for Marine Environmental Sciences; Continental Slope Northeast Brazil; Counting, palynology; Cyperaceae; DEPTH, sediment/rock; Didynopamax; Ephedra distachya-type; Ephedra fragilis-type; Euphorbia-type; Fabaceae; Galium; GeoB16205-4; Gramineae; Gravity corer (Kiel type); Hedyosmum/Convolvulaceae; Ilex; Malvaceae; Maria S. Merian; MARUM; Melastomataceae; Mimosa-type; Mitracarpus; MSM20/3; Myricaceae; Particle, charred; Phyllanthus-type; Piliostigma; Plantago; Podocarpus; Pollen, total; Pollen and spores; Rhizophora; Rubiaceae spp.; Rutaceae; Scrophulariaceae/Solanaceae; SL; Spores total; Sporomorphs indeterminables; Stereospermum-type; Trichilia; Typha; Vernonia-type; Ziziphus  (1)
  • 108-658; 108-658A; 108-658B; Canarias Sea; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Leg108; Ocean Drilling Program; ODP  (1)
  • 108-658B; Acalypha; Acanthaceae; Alchornea; Alnus; Amaranthaceae/Chenopodiaceae; Antidesma-type; Artemisia (Africa); Asphodelus; Balanites; Betula; Blighia-type; Bombax; Borassus-type; Borreria; Boswellia; Brassicaceae; Bridelia; Calligonum; Canarias Sea; Canthium; Capparidaceae; Caryophyllaceae; Cassia-type; Cedrus; Celastraceae/Hippocrateaceae; Celtis; Chrozophora; Cistaceae (Africa); Combretaceae/Melastomataceae; Commiphora; Compositae Liguliflorae; Compositae Tubuliflorae; Convolvulaceae (Africa); Corchorus; Corylus; Counting, palynology; Crotalaria; Cyperaceae undifferentiated; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Diodia-type; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Ephedra; Ericaceae undifferentiated; Euphorbiaceae undifferentiated; Euphorbia-type; Fagus; Fern spores; Geraniaceae (Africa); Grewia; Heliotropium; Hygrophila-type; Hymenocardia; Hyphaene; Indeterminata/varia; Indigofera-type; Iridaceae; Isoberlinia-type; Joides Resolution; Justicia/Monechma; Labiatae; Lannea; Leea; Leg108; Liliaceae undifferentiated; Macaranga-type; Marker, added; Marker, found; Mimosoideae; Mitracarpus; Myrica; Myriophyllum; Nauclea/Mitragyna; Nitraria; Nyctaginaceae; Ocean Drilling Program; ODP; Olea; Oleaceae; Papilionoideae; Paronychia; Phillyrea; Phyllanthus; Picea; Pinus; Plantago; Plantago maritima-type; Plumbaginaceae undifferentiated; Poaceae undifferentiated; Podocarpus; Pollen, total; Polycarpaea-type; Polycarpon; Polygonum senegalense-type; Quercus; Ranunculaceae; Rhamnaceae; Rhizophora; Rhus-type; Rubiaceae monade; Rumex; Sagina; Salvadora persica; Sample code/label; Sapium-type; Sapotaceae/Meliaceae; Sesbania-type; Solanum-type; Tamarix; Tetrorchidium; Thymelaeaceae; Tilia; Tribulus; Typha angustifolia-type; Uapaca; Vitaceae; Volume; Zanthoxylum  (1)
Document type
Keywords
Publisher
  • 1
    ISSN: 1617-6278
    Keywords: Marine palynology ; Tropical rain forest ; North-west Africa ; Brunhes chron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Archaeology , Biology
    Notes: Abstract Palynological data of the marine core M 16415-2 show latitudinal shifts of the northern fringe of the tropical rain forest in north-west Africa during the last 700 ka. Savanna and dry open forest expanded southwards and tropical rain forest expanded northwards during dry and humid periods, respectively. Until 220 ka B.P., the tropical rain forest probably kept its zonal character in West Africa during glacials and interglacials. It is only during the last two glacial periods that the rain forest possibly fragmented into refugia. Throughout the Brunhes chron, pollen and spore transport was mainly by trade winds.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Vegetation history and archaeobotany 6 (1997), S. 117-131 
    ISSN: 1617-6278
    Keywords: Marine palynology ; Vegetation history ; Climate change ; Ocean currents ; Southwest Africa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Archaeology , Biology
    Notes: Abstract A continuous palynological record from the marine core GeoB1016-3 from the Angola Basin reveals the regional vegetation and climate history of the last 300 ka. Pollen and spores found at the studied site have their source areas in the different vegetation zones of the adjacent part of the West African continent. Those vegetation zones comprise tropical rain forest, coastal mangrove swamp, Miombo woodland, dry forest, Afromontane forest, desert and semi-desert. The main pollen transport agent is the southeast trade wind system. Ocean currents also partly play a role in transporting pollen and spores. During the interglacial periods, ocean currents also transported palynomorphs southward. During the glacial periods, increased trade winds are indicated by high influx of pollen and spores and high pollen percentages of Poaceae and taxa from desert and semidesert vegetations. Reconstruction of the geographical position of palaeo-vegetation zones shows that the northern boundary of the Namib Desert did not move north of 12°S during the last 300 ka. This implies that northward shifts of the Angola-Benguela Front did not pass the latitude of 12°S.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2024-03-06
    Keywords: 108-658B; Acalypha; Acanthaceae; Alchornea; Alnus; Amaranthaceae/Chenopodiaceae; Antidesma-type; Artemisia (Africa); Asphodelus; Balanites; Betula; Blighia-type; Bombax; Borassus-type; Borreria; Boswellia; Brassicaceae; Bridelia; Calligonum; Canarias Sea; Canthium; Capparidaceae; Caryophyllaceae; Cassia-type; Cedrus; Celastraceae/Hippocrateaceae; Celtis; Chrozophora; Cistaceae (Africa); Combretaceae/Melastomataceae; Commiphora; Compositae Liguliflorae; Compositae Tubuliflorae; Convolvulaceae (Africa); Corchorus; Corylus; Counting, palynology; Crotalaria; Cyperaceae undifferentiated; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Diodia-type; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Ephedra; Ericaceae undifferentiated; Euphorbiaceae undifferentiated; Euphorbia-type; Fagus; Fern spores; Geraniaceae (Africa); Grewia; Heliotropium; Hygrophila-type; Hymenocardia; Hyphaene; Indeterminata/varia; Indigofera-type; Iridaceae; Isoberlinia-type; Joides Resolution; Justicia/Monechma; Labiatae; Lannea; Leea; Leg108; Liliaceae undifferentiated; Macaranga-type; Marker, added; Marker, found; Mimosoideae; Mitracarpus; Myrica; Myriophyllum; Nauclea/Mitragyna; Nitraria; Nyctaginaceae; Ocean Drilling Program; ODP; Olea; Oleaceae; Papilionoideae; Paronychia; Phillyrea; Phyllanthus; Picea; Pinus; Plantago; Plantago maritima-type; Plumbaginaceae undifferentiated; Poaceae undifferentiated; Podocarpus; Pollen, total; Polycarpaea-type; Polycarpon; Polygonum senegalense-type; Quercus; Ranunculaceae; Rhamnaceae; Rhizophora; Rhus-type; Rubiaceae monade; Rumex; Sagina; Salvadora persica; Sample code/label; Sapium-type; Sapotaceae/Meliaceae; Sesbania-type; Solanum-type; Tamarix; Tetrorchidium; Thymelaeaceae; Tilia; Tribulus; Typha angustifolia-type; Uapaca; Vitaceae; Volume; Zanthoxylum
    Type: Dataset
    Format: text/tab-separated-values, 3552 data points
    Location Call Number Limitation Availability
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  • 4
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    PANGAEA
    In:  Supplement to: Dupont, Lydie M; Beug, Hans-Jürgen; Stalling, H; Tiedemann, Ralf (1989): First palynological results from ODP Site 658 at 21°N west off Africa: pollen as climate indicators. In: Ruddiman, W; Sarnthein, M; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 108, 93-111, https://doi.org/10.2973/odp.proc.sr.108.174.1989
    Publication Date: 2024-01-09
    Description: Ocean Drilling Program Site 658 at 21°N off northwest Africa has a high sedimentation rate and a high concentration of pollen grains and is thus very suitable for detailed pollen analysis. The time scale for the upper 100 m (the last 670 k.y.) of Site 658 is based on biostratigraphic data and isotope stratigraphy. The pollen record has been divided into 34 zones. These are classified into 7 zone types covering a range from very arid to rather humid conditions. The sequence shows a long-term climatic decline: strong glacial stages were found only after 480 k.y. and strong interglacial stages only before 280 k.y. The Site 658 record correlates well with a terrestrial sequence from northern Greece, although both records differ in their response to global climatic change. Spectral analysis shows a 100- and a 42-k.y. period in the curves of pollen brought in by the northwest trade winds and only a 42-k.y. period in the curves of pollen mostly transported by the African Easterly Jet. A 31-k.y. period is found in the curves for Ephedra and Chenopodiaceae-Amaranthaceae. In addition, Ephedra shows a 54-k.y. period.
    Keywords: 108-658; 108-658A; 108-658B; Canarias Sea; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Leg108; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Limitation Availability
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  • 5
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    PANGAEA
    In:  Supplement to: Dupont, Lydie M; Behling, Hermann; Kim, Jung-Hyun (2008): Thirty thousand years of vegetation development and climate change in Angola (Ocean Drilling Program Site 1078). Climate of the Past, 4, 107-124, https://doi.org/10.5194/cp-4-107-2008
    Publication Date: 2024-01-09
    Description: ODP Site 1078 situated under the coast of Angola provides the first record of the vegetation history for Angola. The upper 11 m of the core covers the past 30 thousand years, which has been analysed palynologically in decadal to centennial resolution. Alkenone sea surface temperature estimates were analysed in centennial resolution. We studied sea surface temperatures and vegetation development during full glacial, deglacial, and interglacial conditions. During the glacial the vegetation in Angola was very open consisting of grass and heath lands, deserts and semi-deserts, which suggests a cool and dry climate. A change to warmer and more humid conditions is indicated by forest expansion starting in step with the earliest temperature rise in Antarctica, 22 thousand years ago. We infer that around the period of Heinrich Event 1, a northward excursion of the Angola Benguela Front and the Congo Air Boundary resulted in cool sea surface temperatures but rain forest remained present in the northern lowlands of Angola. Rain forest and dry forest area increase 15 thousand years ago. During the Holocene, dry forests and Miombo woodlands expanded. Also in Angola globally recognised climate changes at 8 thousand and 4 thousand years ago had an impact on the vegetation. During the past 2 thousand years, savannah vegetation became dominant.
    Keywords: 175-1078C; Benguela Current, South Atlantic Ocean; DRILL; Drilling/drill rig; Joides Resolution; Leg175; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 6
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    PANGAEA
    In:  Supplement to: Hessler, Ines; Steinke, Stephan; Groeneveld, Jeroen; Dupont, Lydie M; Wefer, Gerold (2011): Impact of abrupt climate change in the tropical southeast Atlantic during Marine Isotope Stage (MIS) 3. Paleoceanography, 26, PA4209, https://doi.org/10.1029/2011PA002118
    Publication Date: 2024-01-09
    Description: High resolution planktonic foraminifera Mg/Ca paleotemperatures and oxygen isotopes of seawater of Ocean Drilling Program (ODP) Site 1078 (off Angola) have been reconstructed and reveal insights into the seasonal thermal evolution of the Angola Current (AC), the Angola-Benguela Front (ABF), and the Benguela Current (BC) during the last glacial (50-23.5 ka BP). Special emphasis is put on time intervals possibly associated with the North Atlantic Heinrich Stadials (HS), which are thought to lead to an accumulation of heat in the South Atlantic due to a reduction of the Atlantic Meridional Overturning Circulation (AMOC). Within dating uncertainties, Globigerinoides ruber (pink) Mg/Ca-based sea surface temperature (SST) estimates that represent southern hemisphere summer surface conditions show several warming episodes that coincide with North Atlantic HS, thus supporting the concept of the bipolar thermal seesaw. In contrast, the Mg/Ca-based temperatures of Globigerina bulloides, representing the SST of the ABF/BC system during southern hemisphere winter, show no obvious response to the North Atlantic HS in the study area. We suggest that surface water cooling during the winter season is due to enhanced upwelling or upwelling of colder water masses which has most likely mitigated a warming of the ABF/BC system during HS. We further speculate that the seasonal asymmetry in our SST record results from seasonal differences in the dominance of atmospheric and oceanic teleconnections during periods of northern high latitude cooling.
    Keywords: 175-1078C; Benguela Current, South Atlantic Ocean; DRILL; Drilling/drill rig; Joides Resolution; Leg175; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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  • 7
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    PANGAEA
    In:  Supplement to: Hessler, Ines; Dupont, Lydie M; Handiani, Dian Noor; Paul, André; Merkel, Ute; Wefer, Gerold (2012): Masked millennial-scale climate variations in South West Africa during the last glaciation. Climate of the Past, 8(2), 841-853, https://doi.org/10.5194/cp-8-841-2012
    Publication Date: 2024-01-09
    Description: To address the connection between tropical African vegetation development and high-latitude climate change we present a high-resolution pollen record from ODP Site 1078 (off Angola) covering the period 50-10 ka BP. Although several tropical African vegetation and climate reconstructions indicate an impact of Heinrich Stadials (HSs) in Southern Hemisphere Africa, our vegetation record shows no response. Model simulations conducted with an Earth System Model of Intermediate Complexity including a dynamical vegetation component provide one possible explanation. Because both precipitation and evaporation increased during HSs and their effects nearly cancelled each other, there was a negligible change in moisture supply. Consequently, the resulting climatic response to HSs might have been too weak to noticeably affect the vegetation composition in the study area. Our results also show that the response to HSs in southern tropical Africa neither equals nor mirrors the response to abrupt climate change in northern Africa.
    Keywords: 175-1078C; Benguela Current, South Atlantic Ocean; DRILL; Drilling/drill rig; Joides Resolution; Leg175; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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  • 8
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    PANGAEA
    In:  Supplement to: Bouimetarhan, Ilham; Chiessi, Cristiano Mazur; González-Arango, Catalina; Dupont, Lydie M; Voigt, Ines; Prange, Matthias; Zonneveld, Karin A F (2018): Intermittent development of forest corridors in northeastern Brazil during the last deglaciation: Climatic and ecologic evidence. Quaternary Science Reviews, 192, 86-96, https://doi.org/10.1016/j.quascirev.2018.05.026
    Publication Date: 2024-06-25
    Description: The semi-arid northeastern (NE) Brazil vegetation is largely dominated by Caatinga, one of the largest and richest dry forests in the world. Caatinga is a strategic biome, since it has borders with Cerrado, Atlantic forests and the Amazon, acting as a potential corridor (or barrier) for biotic interchange between these regions during evolutionary times. Therefore, accurate reconstructions of past vegetation, ecological and hydrological changes in this area are critical to understanding the dynamics of biome boundaries that may play an important role in dispersal and diversi!cation mechanisms and, more specifically, the link between the long-term climate variability and tropical biodiversity. Here, we present high-resolution palynological and elemental data from marine core GeoB16205-4 retrieved off the Parnaíba River mouth (NE Brazil) mainly covering the Younger Dryas (YD). We show that the YD interval was predominantly wet in NE Brazil, yet it was not homogenous and two distinct phases could be distinguished. A marked intensi!cation of wet conditions between ~12.3 and 11.6 cal kyr BP was recorded by the expansion of tropical rainforest and tree ferns. These results are in agreement with the transient TraCE-21k coupled climate model simulation. We infer that the second pluvial phase of the YD is related to a weak AMOC due to meltwater pulses in the North Atlantic, which forces a southward shift of the Intertropical Convergence Zone and its associated rainfall. Our records provide new evidence on the establishment of an “eastern forest corridor” in the nowadays semi-arid Caatinga allowing for past biotic interchanges of plant species.
    Keywords: 056-4; Acacia; Acanthaceae; AGE; Alchornea; AMADEUS; Amaranthaceae/Chenopodiaceae; Ambrosia; Anacardiaceae; Arecaceae; Artemisia; Asteroideae; Bertiera-type; Borreria; Boscia-type; Burseraceae; Caesalpiniaceae; Cassia-type; Celtis; Center for Marine Environmental Sciences; Continental Slope Northeast Brazil; Counting, palynology; Cyperaceae; DEPTH, sediment/rock; Didynopamax; Ephedra distachya-type; Ephedra fragilis-type; Euphorbia-type; Fabaceae; Galium; GeoB16205-4; Gramineae; Gravity corer (Kiel type); Hedyosmum/Convolvulaceae; Ilex; Malvaceae; Maria S. Merian; MARUM; Melastomataceae; Mimosa-type; Mitracarpus; MSM20/3; Myricaceae; Particle, charred; Phyllanthus-type; Piliostigma; Plantago; Podocarpus; Pollen, total; Pollen and spores; Rhizophora; Rubiaceae spp.; Rutaceae; Scrophulariaceae/Solanaceae; SL; Spores total; Sporomorphs indeterminables; Stereospermum-type; Trichilia; Typha; Vernonia-type; Ziziphus
    Type: Dataset
    Format: text/tab-separated-values, 933 data points
    Location Call Number Limitation Availability
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  • 9
    Publication Date: 2024-06-26
    Keywords: 175-1075A; 175-1079A; 175-1082A; 175-1084A; Accumulation rate, calcium carbonate; Accumulation rate, n-Alkanes; Accumulation rate, n-alkanol; Accumulation rate, total organic carbon; Age model; Angola Basin; Benguela Current, South Atlantic Ocean; Calculated, see reference(s); Carbon Preference Index, n-Alkanes (C27-C33); Carbon Preference Index, n-Alkanols; Center for Marine Environmental Sciences; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Event label; GeoB1008-3; GeoB1016-3; GeoB1028-5; GeoB1710-3; GeoB1722-1; Gravity corer (Kiel type); Higher Plant Alkanes index; Joides Resolution; Latitude of event; Leg175; Longitude of event; M20/2; M6/6; MARUM; Meteor (1986); n-Alkane, average chain length; n-Alkanol average chain length; Namibia continental slope; Ocean Drilling Program; ODP; Sea surface temperature, annual mean; see reference(s); SL; Walvis Ridge, Southeast Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 99 data points
    Location Call Number Limitation Availability
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  • 10
    Publication Date: 2024-06-26
    Keywords: 175-1075A; 175-1079A; 175-1082A; 175-1084A; Accumulation rate, calcium carbonate; Accumulation rate, n-Alkanes; Accumulation rate, n-alkanol; Accumulation rate, total organic carbon; Age model; Angola Basin; Benguela Current, South Atlantic Ocean; Calculated, see reference(s); Carbon Preference Index, n-Alkanes (C27-C33); Carbon Preference Index, n-Alkanols; Center for Marine Environmental Sciences; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Event label; GeoB1008-3; GeoB1016-3; GeoB1028-5; GeoB1710-3; GeoB1722-1; Gravity corer (Kiel type); Higher Plant Alkanes index; Joides Resolution; Latitude of event; Leg175; Longitude of event; M20/2; M6/6; MARUM; Meteor (1986); n-Alkane, average chain length; n-Alkanol average chain length; Namibia continental slope; Ocean Drilling Program; ODP; Sea surface temperature, annual mean; see reference(s); SL; Walvis Ridge, Southeast Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 99 data points
    Location Call Number Limitation Availability
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