cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.919839
title: Individual denitrification and oxygen respiration rates of benthic foraminifera from Gullmar Fjord, Sweden

description: Samples have been taken from the Alsbäck Deep in Gullmar Fjord, Sweden (58°19.38'N, 11°32.74'E; 117 m depth). Summary of individual measurements for foraminiferal denitrification and oxygen repiration rates (individual), where Ind. refers to the number of individuals used for one incubation. The replicate number is used to distinguish between different biological replicates of the same rate and species. The number of specimens indicates how many foraminifera were used for this replicate. Type of rate indicates if denitrification or oxygen respiration was measured. The metabolic rates were calculated from linear steady-state gradients of nitrous oxide or oxygen in glass microcapsules as described in the related publication Woehle & Roy et al. (2018). Cell volumes and volume specific rates are only given for the oxygen respiration rates.
DOI: 10.1594/pangaea.919633
title: Pollen analyses of IODP Site 361-U1479
DOI: 10.1594/pangaea.921093
title: Organic matter composition of the water column in mesocosm study (Bergen 2011)

description: During the ocean acidification study in Bergen (2011) we measured concentrations of dissolved organic carbon (DOC) and nitrogen (DOC) as well as concentrations of total and dissolved amino acids and carbohydrates including individual compounds in mesocosms.
DOI: 10.1594/pangaea.921208
title: Pollen analysis of ODP Hole 202-1239A

description: Vegetation and climate change in western equatorial South America were studied using palynological analysis. We studied 88 marine sediment samples from ODP Site 1239 dated between 3.9 and 2.7 Ma. The presented pollen record represents the regional vegetation from the coastal lowlands to the high montane Páramo in the western Andean Cordillera. A trend towards more open vegetation is observed. The climate changes towards cooler conditions, which is manifested by a lowering of the forest line from 3.3 Ma on. An increase of Amaranthaceae pollen after 3.1 Ma suggests drier conditions along the coast. The isochronous occurrence of environmental changes in the presented record, that is, cooling and coastal drying, with the ﬁrst major pulse of ice‐rafted debris and cooling temperatures in the Northern Hemisphere suggests that these changes might have been a precursor of the intensiﬁcation of the Northern Hemisphere glaciation.
DOI: 10.1594/pangaea.921903
title: Net photosynthesis rates of three coral species during an artificial upwelling experiment

description: TreatmentsControl = constant 28°CHeat = constant 31°CHeat+50m = constant 31°C + daily simulated upwelling from 50 m depth for 25 minutesHeat+50m = constant 31°C + daily simulated upwelling from 100 m depth for 25 minutes
DOI: 10.1594/pangaea.923143
title: Pollen abundances in Lake Dendi sediments

description: Northern Africa's past hydroclimate is characterized by a prolonged humid period known as the African Humid Period (AHP), giving origin to the "Green Sahara" and supporting human settlements into areas that are now desert. The spatial and temporal extent of climate change associated with the AHP is, however, subject to ongoing debate. Uncertainties arise from the complex nature of the African climate, which is controlled by the strength and interactions of different monsoonal systems, resulting in meridional shifts in rainfall belts and zonal movements of the Congo Air Boundary (CAB), associated with changes in dominant moisture sources. Here, we examine a ~12,500-year record of hydroclimate variability from Lake Dendi, East Africa, based on a combination of plant-wax-specific hydrogen (δD) and carbon (δ13C) isotopes. In addition, pollen data from the same sediment core are used to investigate the response of the local vegetation to changing climate conditions. Our δD record indicates high precipitation during the peak AHP (from ca. 10 to 8 ka BP) followed by a gradual transition towards a drier late Holocene climate. Likewise, vegetation cover changed from predominant grassland towards an arid montane forest dominated by Juniperus and Podocarpus trees accompanied by a general reduction of understory grasses. This trend is corroborated by δ13C values pointing to an increased contribution of C3 plants during the mid- to late Holocene. Peak aridity occurred around 2 ka BP, followed by a return to a generally wetter climate (indicated by higher Podocarpus and lower Juniperus pollen values) possibly linked to enhanced Indian Ocean Monsoon strength. Starting at around 1 ka BP, increased anthropogenic activity, i.e. deforestation and agriculture is indicated by the pollen data, in agreement with intensified human impact recorded for the region. The magnitude of δD change (ca. 40‰) between peak wet conditions and late Holocene aridity is in line with other regional δD records of East Africa. The timing and pace of aridification parallels those of African and Indian monsoon records indicating a gradual response to local insolation change. Our new record combining plant-wax δD and δ13C values with pollen highlights the sensitive responses of the local vegetation to precipitation changes in the Ethiopian highlands. Our results also stress that information on local vegetation structure is important when interpreting hydroclimate change.
DOI: 10.1594/pangaea.921905
title: Zooxanthellae density and chlorophyll a concentration in three coral species during an artificial upwelling experiment

description: TreatmentsControl = constant 28°CHeat = constant 31°CHeat+50m = constant 31°C + daily simulated upwelling from 50 m depth for 25 minutesHeat+50m = constant 31°C + daily simulated upwelling from 100 m depth for 25 minutes
DOI: 10.1594/pangaea.921925
title: Temperature regimes during an artificial upwelling experiment (all treatments)

description: This dataset containes the data of one temperature logger per treatment:Control = constant 28°CHeat = constant 31°CHeat+50m = constant 31°C + daily simulated upwelling from 50 m depth for 25 minutesHeat+100m = constant 31°C + daily simulated upwelling from 100 m depth for 25 minutes
DOI: 10.1594/pangaea.921926
title: Temperature regimes during an artificial upwelling experiment (artificial upwelling treatments)

description: This dataset containes the data of three temperature loggers per AU treatment: 3 loggers in AU+50m in aquarium A1, A3, A5; 3 loggers in AU+100m in aquarium B1, B3, B5.AU+50m = constant 31°C + daily simulated upwelling from 50 m depth for 25 minutesAU+100m = constant 31°C + daily simulated upwelling from 100 m depth for 25 minutes
DOI: 10.1594/pangaea.922096
title: Organic-walled dinoflagellate cyst of sediment core GeoB4223-1
DOI: 10.1594/pangaea.922629
title: Organic-walled dinoflagellate cyst of sediment core GeoB8601-3
DOI: 10.1594/pangaea.922681
title: Pollen counts and vegetation composition data of surface samples from Cajas National park, Ecuadorian Andes

description: These data represent pollen counts from sediment and moss polster samples collected in 2015 along an altitudinal gradient in the Ecuadorian Andes. Moss polsters are collected from vegetation releves for which the composition has been determined following the Braun Blanquet scale. Metadata includes location, altitude and lake depth. Details are described in Hagemans et al, 2019
DOI: 10.1594/pangaea.923740
title: Pollen composition of Lake Relem sediment core, northern Patagonia

description: To process the pollen and macro-charcoal from the sediment samples, we followed Bennett and Willis (2002), and Withlock and Larsen (2002) protocols. We took 176 pollen samples of 0.5 cm³ along the core, avoiding tephra layers. The samples were not sieved. At least 400 pollen grains per sample were counted using a light microscope at 400-1000x.
DOI: 10.1594/pangaea.923957
title: Pollen relative abundances at IODP Site 361-U1478
DOI: 10.1594/pangaea.923607
title: Pollen profile of core BS_2/16 from Marienberg, Brandenburg a.d. H.

description: A 14C-Dated pollen diagram of the Marienberg in the old town of Brandenburg a. d. Havel shows the history of vegetation at this site for the entire Holocene. Since it is a small pollen archive, it offers statements of local significance. It shows on the one hand the development of the forest vegetation at Marienberg, on the other hand the formation of a wet biotope from a pond with a water depth of several meters to a fen and finally to a pond, which was strongly eutrophicated especially in the Middle Ages and in modern times. The prehistoric and early historical settlement is only weakly reflected in the pollen findings. Of special interest are findings of walnut and wine pollen, which can be connected to the Medieval monastary Marienstift, which was an important place of pilgrimage.
DOI: 10.1594/pangaea.928642
title: Relative abundances of pollen in sediment core MD03-2607

description: Pollen data was generated by Sander van der Kaars.
DOI: 10.1594/pangaea.929767
title: Taxonomically harmonized pollen percentages of African samples with revised chronologies
DOI: 10.1594/pangaea.931929
title: Grazing experiments with Oxyrrhis marina and coccolithophores: abundance of calcified and decalcified cells

description: In laboratory culture experiments, calcified and decalcified coccolithophore cells were offered as prey to a phagotrophic predator, both in separate pure cultures with calcified or decalcified cells only, and in mixed cultures that contained both cell types. Overall, three experiments were conducted, each with a different coccolithophore species. The prey and predator concentrations were monitored over the course of each experiment by flow cytometry and microscopic counting.
DOI: 10.1594/pangaea.931930
title: Grazing experiments with Oxyrrhis marina and coccolithophores: abundances of prey and predator

description: In laboratory culture experiments, calcified and decalcified coccolithophore cells were offered as prey to a phagotrophic predator, both in separate pure cultures with calcified or decalcified cells only, and in mixed cultures that contained both cell types. Overall, three experiments were conducted, each with a different coccolithophore species. The prey and predator concentrations were monitored over the course of each experiment by flow cytometry and microscopic counting.
DOI: 10.1594/pangaea.934425
title: In-situ measurements of surface layer and ice thickness during the Oden_AO2018 campaign in August/September 2018

description: Measurements of surface layer thickness, sea-ice thickness, total sea-ice thickness, water level, freeboard, sea-ice draft, and melt pond depth obtained at holes drilled through the ice using a tape measure at markers M0 to M23 distributed on an approximately 100 x 100 m grid during the Oden_AO2018 campaign 17 August.
DOI: 10.1594/pangaea.939855
title: Growth, POC and PIC production rates of individual E. huxleyi strains in the Azores, Bergen and Canary Islands populations to CO2 ranges from 115 μatm to 3070 μatm (Figure 2, Figure S3, Figure S5)
DOI: 10.1594/pangaea.941391
title: Pollen and spore percentage data of composite sediment core GeoB16602 over the past 140 kyr

description: Cores of marine site GeoB16602 (18.95°N, 113.71°E, water depth, 953 m) were recovered during the 2012 RV SONNE cruise SO-221 “INVERS”, northern South China Sea. Pollen samples were processed via standard hydrochloric-hydrofluoric acid procedure. Pollen and spore percentages were calculated based on the pollen sum (&gt;300 grains per sample) and spore sum (&gt;100 grains) respectively. The data set cover the whole last glacial cycle (140 kyr) with an average temporal resolution of ~600 years, revealing vegetation evolution history of the Pearl River catchment area in southern China. In general, the results reveal three different evolution patterns of vegetation at the tropical-subtropical flora ecotone: the zonal forest exhibited a clear glacial-interglacial cycle and weak response to stadial cooling; the fern communities exhibited similar glacial-interglacial variations but more sensitivity to low-amplitude temperature fluctuations; the glacial-interglacial trend in coastal wetland vegetation was ambiguous whereas a series of millennial-scale expansion events were closely related with sea-level rises.
DOI: 10.1594/pangaea.930613
title: Taxonomically harmonized pollen counts of western North America samples with revised chronologies
DOI: 10.1594/pangaea.930672
title: Taxonomically harmonized pollen counts of eastern North America samples with revised chronologies
DOI: 10.1594/pangaea.930685
title: Taxonomically harmonized pollen counts of Indopacific samples with revised chronologies
DOI: 10.1594/pangaea.932589
title: Measurements of snow depth, sea-ice thickness, total sea-ice thickness, water level, freeboard, and sea-ice draft obtained at holes drilled through the ice during the ALERT2018 campaign (MAP Last Ice) at station ALERT2018_05

description: Measurements of snow depth, sea-ice thickness, total sea-ice thickness, water level, freeboard, and sea-ice draft obtained at holes drilled through the ice using a tape measure at markers M0 to M10 each separated by 10 m and distributed along the 100 m transect at station ALERT2018_05.
DOI: 10.48597/vzxc-yw7c
title: Measurement of Pm10_mass at Wheeler Peak

description: Measurement of Pm10_mass at Wheeler Peak
DOI: 10.1594/pangaea.930813
title: Taxonomically harmonized pollen percentages of Indopacific samples with revised chronologies
DOI: 10.48597/wbmt-p8a6
title: Measurement of Pm10_mass at San Pedro Parks

description: Measurement of Pm10_mass at San Pedro Parks
DOI: 10.48597/whqt-2pep
title: Measurement of Pm25_mass at Wheeler Peak

description: Measurement of Pm25_mass at Wheeler Peak
DOI: 10.1594/pangaea.930817
title: Taxonomically harmonized pollen percentages of South America samples with revised chronologies
DOI: 10.48597/wp7c-2jta
title: Measurement of Pm10_mass at Wheeler Peak

description: Measurement of Pm10_mass at Wheeler Peak
DOI: 10.48597/wy34-zmf3
title: Measurement of Pm10_mass at Wheeler Peak

description: Measurement of Pm10_mass at Wheeler Peak
DOI: 10.48597/xjgr-qqmc
title: Measurement of Pm25_mass at San Pedro Parks

description: Measurement of Pm25_mass at San Pedro Parks
DOI: 10.48597/xr6y-yeeg
title: Measurement of Pm25_mass at Wheeler Peak

description: Measurement of Pm25_mass at Wheeler Peak
DOI: 10.1594/pangaea.930825
title: Taxonomically harmonized pollen percentages of eastern North America samples with revised chronologies
DOI: 10.48597/xrp2-49kz
title: Measurement of Pm25_mass at Walker River Paiute Tribe

description: Measurement of Pm25_mass at Walker River Paiute Tribe
DOI: 10.48597/xz7s-dsg9
title: Measurement of Pm25_mass at Wichita Mountains

description: Measurement of Pm25_mass at Wichita Mountains
DOI: 10.48597/yjeb-erqy
title: Measurement of Pm25_mass at Three Sisters Wilderness

description: Measurement of Pm25_mass at Three Sisters Wilderness
DOI: 10.48597/yurm-3m9u
title: Measurement of Pm25_mass at Wichita Mountains

description: Measurement of Pm25_mass at Wichita Mountains
DOI: 10.48597/z8fj-w7ws
title: Measurement of Pm25_mass at San Pedro Parks

description: Measurement of Pm25_mass at San Pedro Parks
DOI: 10.48597/zcs4-48tb
title: Measurement of Pm25_mass at Wheeler Peak

description: Measurement of Pm25_mass at Wheeler Peak
DOI: 10.48597/zhfv-peek
title: Measurement of Pm10_mass at Wheeler Peak

description: Measurement of Pm10_mass at Wheeler Peak
DOI: 10.48597/zxen-w68d
title: Measurement of Pm25_mass at Wichita Mountains

description: Measurement of Pm25_mass at Wichita Mountains
DOI: 10.48597/2baf-5f8y
title: Measurement of POPs (persistent organic pollutants) at Alert

description: Measurement of POPs (persistent organic pollutants) at Alert
DOI: 10.48597/2kqn-kc9x
title: Measurement of Sulphate_total at Færøerne-Akraberg

description: Measurement of Sulphate_total at Færøerne-Akraberg
DOI: 10.48597/3a9r-4s2g
title: Measurement of Inorganics in air and particle phase at Chopok

description: Measurement of Inorganics in air and particle phase at Chopok
DOI: 10.48597/42xz-sg98
title: Measurement of Inorganics in air and particle phase at Witteveen

description: Measurement of Inorganics in air and particle phase at Witteveen
DOI: 10.48597/44rb-ercq
title: Measurement of Inorganics in air and particle phase at Bilthoven

description: Measurement of Inorganics in air and particle phase at Bilthoven
DOI: 10.48597/46qd-c6b8
title: Measurement of Heavy metals at Pedersker

description: Measurement of Heavy metals at Pedersker
DOI: 10.1594/pangaea.931217
title: Seawater carbonate chemistry and mesozooplankton abundances of KOSMOS 2014 mesocosm study

description: Ocean acidification (OA) is affecting marine ecosystems through changes in carbonate chemistry that may influence consumers of phytoplankton, often via trophic pathways. Using a mesocosm approach, we investigated OA effects on a subtropical zooplankton community during oligotrophic, bloom, and post-bloom phases under a range of different pCO2 levels (from 400 to 1480 μatm). Furthermore, we simulated an upwelling event by adding 650 m-depth nutrient-rich water to the mesocosms, which initiated a phytoplankton bloom. No effects of pCO2 on the zooplankton community were visible in the oligotrophic conditions before the bloom. The zooplankton community responded to phytoplankton bloom by increased abundances in all treatments, although the response was delayed under high-pCO2 conditions. Microzooplankton was dominated by small dinoflagellates and aloricate ciliates, which were more abundant under medium- to high-pCO2 conditions. The most abundant mesozooplankters were calanoid copepods, which did not respond to CO2 treatments during the oligotrophic phase of the experiment but were found in higher abundance under medium- and high-pCO2 conditions toward the end of the experiment, most likely as a response to increased phyto- and microzooplankton standing stocks. The second most abundant mesozooplankton taxon were appendicularians, which did not show a response to the different pCO2 treatments. Overall, CO2 effects on zooplankton seemed to be primarily transmitted through significant CO2 effects on phytoplankton and therefore indirect pathways. We conclude that elevated pCO2 can change trophic cascades with significant effects on zooplankton, what might ultimately affect higher trophic levels in the future.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2021-04-30.
DOI: 10.48597/4r8b-ebvd
title: Measurement of Nitrogen_dioxide at Stará Lesná

description: Measurement of Nitrogen_dioxide at Stará Lesná
DOI: 10.48597/4vtr-ecfa
title: Measurement of Sulphur_dioxide at Turlough Hill

description: Measurement of Sulphur_dioxide at Turlough Hill
DOI: 10.48597/54ds-qn6j
title: Measurement of Heavy metals at Kevo

description: Measurement of Heavy metals at Kevo
DOI: 10.48597/55sx-vm3g
title: Measurement of POPs (persistent organic pollutants) at Alert

description: Measurement of POPs (persistent organic pollutants) at Alert
DOI: 10.48597/5r4g-saek
title: Measurement of Sulphur_dioxide at Valentia Observatory

description: Measurement of Sulphur_dioxide at Valentia Observatory
DOI: 10.48597/637j-afgx
title: Measurement of Heavy metals at Oulanka

description: Measurement of Heavy metals at Oulanka
DOI: 10.48597/6dnz-u6rn
title: Measurement of Copper at Lahemaa

description: Measurement of Copper at Lahemaa
DOI: 10.1594/pangaea.945261
title: Raw data on pollen and spores counts from the sedimentation record/JAM2 sediment trap off SW Java in the Indian Ocean under reverse monsoon conditions

description: Settling particles collected in a sediment trap 60 km off SW Java in the Indian Ocean at a 2200 m deep site, about 830 m above the sea floor, between December 2001 and November 2002 (intervals of 16 days for 11 months) were analyzed for the abundance and taxa composition of pollen and spores. Several factors control their deposition such as the monsoon-driven reversal of the wind directions and ocean currents as well as flowering periods. Long distance transport plays a particular role during the monsoon seasons. During the NW monsoon (mid-December – beginning of March), maxima of Picea type, Alnus, Pinus and Quercus pollen occur in the trap samples, which corresponds to wind and marine currents coming from the north, probably the Equatorial Counter Current and Southern Java Current, transporting pollen from the southern part of continental Asia and Sumatra to the research area. During the SE monsoon (end of July – mid-November), an increase of pollen originating from southeast Indonesia and Australia was observed. Pollen grains were probably transported by the South Equatorial Current and partly by the Leeuwin Current. Casuarina and, in part, Eucalyptus are most abundant during this period. During the intermonsoon period, assemblages are mainly composed of pollen originating from West Java. Maxima of some pollen taxa, such as Elaeocarpus, Myrica, Dacrycarpus type, Casuarina, Eucalyptus and Podocarpus type probably reflect their flowering periods. The transportation time from the pollen source area to the sediment trap is about 1-2 months. The extrapolated pollen accumulation rate of the marine sediment trap would be about 1670 grains/cm2/yr. The trap collected low concentrations of mangrove pollen, which might be the result of the strong destruction of the mangrove belt in Java during recent decades. High values of Poaceae pollen are probably related to the land use, forest canopy opening and development of the secondary vegetation in West Java. The majority of the pollen and spores collected by the sediment trap reflect the vegetation of SW Java, but long distance transport, in particular by the marine currents during the SE and NE monsoons, needs to be considered when interpreting marine pollen records off SW Java in the eastern Indian Ocean.
description: Samples D1–D5 (December 14, 2001–March 4, 2002; NW monsoon period)Samples D6–D14 (March 4–July 10, 2002, intermonsoon period)Samples D15–D21 (July 10–November 15, 2002, SE monsoon period)
DOI: 10.48597/6hwx-ydhp
title: Measurement of Inorganics in air and particle phase at Liesek

description: Measurement of Inorganics in air and particle phase at Liesek
DOI: 10.1594/pangaea.945739
title: Pollen, spore and algae counts of sediment core COL17c
DOI: 10.48597/7fk9-8w3h
title: Measurement of Inorganics in precipitation at Chopok

description: Measurement of Inorganics in precipitation at Chopok
DOI: 10.1594/pangaea.948573
title: KOSMOS 2017 Peru mesocosm study: export flux and particle sinking velocities

description: As one of Earth's most productive marine ecosystems, the Peruvian Upwelling System transports large amounts of biogenic matter from the surface to the deep ocean. Whilst particle sinking velocity is a key factor controlling the biological pump, thereby affecting carbon sequestration and oxygen-depletion, it has not yet been measured in this system. During a 50-day mesocosm experiment in the surface waters off the coast of Peru, we regularly measured particle sinking velocities and their biogeochemical and physical drivers. We further characterized the general properties of sinking matter (sampling depth: 17 m) under different phytoplankton communities and nutritional states. This dataset contains mean velocities of sinking particles as well as their median size, compactness and shape. We further included the particulate organic carbon flux, the sinking matter nitrogen to phosphorus ratio and the relative contribution of opal and particulate inorganic carbon to the total flux. The particle flux characteristics are complemented by measurements of chlorophyll a concentration in the water column and the relative contribution of diatoms to total chlorophyll a.