cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25921/8dxj-7121
title: NOAA/WDS Paleoclimatology - Rydval - Rabštejn - PCAB - ITRDB CZEC021

description: Extreme tree growth reductions represent events of abrupt forest productivity decline and carbon sequestration reduction. An increase in their magnitude can represent an early warning signal of impending tree mortality. Yet the long-term trends in extreme growth reductions remain largely unknown. We analyzed the trends in the proportion of trees exhibiting extreme growth reductions in two Central-European conifer species - Pinus sylvestris (PISY) and Picea abies (PCAB) - between 1901 and 2018. We used a novel approach for extreme growth reduction quantification by relating their size to their mean recurrence interval. Twenty-eight sites throughout Czechia and Slovakia with 1120 ring width series representing high- and low-elevation forests were inspected for extreme growth reductions with recurrence intervals of 15 and 50 years along with their link to climatic drivers. Our results show the greatest growth reductions at low-elevation PCAB sites, indicating high vulnerability of PCAB to drought. The proportions of trees exhibiting extreme growth reductions increased over time at low-elevation PCAB, decreased recently following an abrupt increase in the 1970-1980s at high-elevation PCAB, and showed nonsignificant trends in high- and low-elevation PISY. Climatic drivers of extreme growth reductions, however, shifted over time for all site categories as the proportion of low-temperature-induced extreme growth reductions declined since the 1990s, whereas events caused by drought consistently increased in frequency during the same period. We observed higher growth volatility at the lower range of distribution compared with the upper range margin of PISY and PCAB. This will undoubtedly considerably impact tree growth and vitality as temperatures and incidence of drought in Central Europe are expected to further increase with ongoing climate change.
description: Extreme growth reductions in Central-European Pinus sylvestris (PISY) and Picea abies (PCAB). NOAA Template Raw Measurements file added 2021-12-29.
DOI: 10.25921/8zxv-m971
title: NOAA/WDS Paleoclimatology - Maxwell - Matawaumkeag - TSCA - ITRDB ME046

description: Determining the response of forest growth and productivity to climate variability is crucial for understanding and modeling forest carbon sequestration in mesic temperate forests. Most tree-ring analyses have used monthly climate data. Daily climate data may be more appropriate to use in the determination of tree-ring response to climate because cell division, enlargement, and thickening occur during discrete periods of the growing season. We analyze annual tree-ring width and d13C from Tsuga canadensis (1992-2012) at ten sites in the northeastern US to test the null hypothesis that tree-ring width and d13C respond similarly to critical climate periods using daily climate data and linear regression. There was a significant difference in the climate response of ring width and d13C. Precipitation predicted both d13C and ring width with the highest r2 and greatest level of significance overall. d13C integrated climate over longer periods of the year (and previous year) than ring width at most sites. d13C showed a more consistent seasonal signal across sites for each climate variable than ring width. Our work provides a new perspective on the response of annual tree growth and d13C to climatic variability that can inform ecosystem productivity, carbon cycle, and earth system models.
description: Part of New England Hemlock Transect, 10 sites along a 500+ km transect stretching from CT to ME NOAA Template Raw Measurements file added 2021-02-22.
DOI: 10.25921/8mzv-kv31
title: NOAA/WDS Paleoclimatology - Allen - Hayesfarm - CAIN - ITRDB AUSL057

description: An understanding of tropical hydroclimate variability, the associated drivers and how it is likely to change is a major scientific and societal challenge that is acutely hampered by short instrumental records. We present a 246-year tree-ring drought reconstruction of the Standardised Precipitation Evaporation Index (SPEI) for monsoonal northern Australia for the end of the wet season (March-May; MAM). This reconstruction extends the instrumental record back by 150 years. Around one third of total annual rainfall falls during MAM, making it a crucial component of the monsoonal cycle. MAM is also the season most impacted by the differential decay process of Central Pacific (as opposed to Western Pacific) El Nino events that are linked with dry conditions over northern and northwestern Australia more generally. Our reconstruction therefore provides an opportunity to consider how central Pacific variability has modulated MAM hydroclimate in Australia's monsoonal north over the past two and a half centuries. We found that MAM hydroclimate extremes in the region have a strong, but asymmetric relationship with central Pacific sea surface temperatures (SSTs) and ENSO indices. Extremely wet MAMs in monsoonal north Australia were associated with cooler SSTs, above average rainfall across much of Australia, and often coincided with La Nina events. The spatial relationship between dry extremes and Pacific SSTs during dry events was generally, but weakly, consistent with the SST signature of central Pacific El Nino events. The association between reconstructed dry extremes in the monsoonal north and dry conditions across the rest of Australia is also less extensive and weaker than for wet events. Results suggest that more extreme wet events in the Australian monsoonal north likely reflect cool central Pacific SSTs and later termination of the Australian monsoon. Consecutive years with extremely dry MAMs became more frequent over the latter part of the 20th Century while the probability of an extreme dry MAM followed by an extreme wet MAM the next year peaked in the mid 20th Century and has since declined.
description: Callitris intratropica ring-width data used for drought reconstruction, monsoonal north Australia. NOAA Template Raw Measurements file added 2020-11-18. July 2024: Elevation added by WDS-Paleo using get_elev_point() from the elevatr R package with the AWS Terrain Tiles (aws) and WGS 84 reference frame.
DOI: 10.25921/825c-hn39
title: NOAA/WDS Paleoclimatology - Tumajer - Roudnice 2 - QURO - ITRDB CZEC031

description: Increasing temperatures and recent changes in runoff regimes observed in Central Europe might alter the growth and relative water uptake of floodplain trees. To predict responses of floodplain forests to climate change, it is necessary to determine the climatic controls over tree growth and vessel anatomy. We analysed the responses of tree-ring width and earlywood vessel anatomical parameters (average vessel lumen area, vessel density and total vessel lumen area) of pedunculate oak (Quercus robur L.) growing in a floodplain to hydroclimatic conditions represented by temperature, the drought index (scPDSI), river discharge, groundwater level, and occurrence of floods and drought events. Site chronologies were assembled for floodplain and reference sites and, subsequently, correlated with time series of hydroclimatic conditions. Our results show that radial growth of floodplain trees is particularly positively influenced by temperature during the growing season and during previous year's summer. By contrast, the growth of reference trees is highly drought-limited. Earlywood average vessel lumen area chronologies from both floodplain and reference sites share a positive temperature signal from January to April. However, the effect of water availability (indicated by the drought index) on vessel size is mostly negative for floodplain trees (with a maximum response to the autumn of the year preceding tree-ring formation) and positive or non-significant for reference trees. Vessel density chronologies contain the inverse environmental information as tree-ring width, however, with amplified negative correlations with current year temperatures at floodplain sites. Total vessel area is associated mostly with temperature in previous May and June. The drought index recorded exactly the same information in tree-rings as did river discharges and groundwater levels. The results of both correlation and trend analysis evidence that tree-ring width of floodplain Q. robur unambiguously increases with increasing temperature; on the other hand, droughts can become a serious problem affecting the productivity of reference trees growing in more distal parts of the lowland. Vessel size of Q. robur growing outside the floodplain recently tends to increase with increasing temperatures, making xylem more effective at water transport but also more vulnerable to cavitation.
description: The data represent raw tree-ring width series. One core was extracted from each tree (Quercus robur). NOAA Template Raw Measurements file added 2021-12-29.
DOI: 10.25921/86q1-jf24
title: NOAA/WDS Paleoclimatology - Voronin - Angarsk - PISY - ITRDB RUSS294

description: Tree ring data from the International Tree Ring Data Bank and World Data Center for Paleoclimatology archives.  Most data sets include raw treering measurements (most are annual ring width, with some collections of earlywood or latewood width or wood density), plus chronologies (standardized growth indices for a site compiled from multiple treering samples). Reconstructions of climate variables are included with some of these data sets.  Each data type is stored in a separate data file; the data type is coded into the file name. For details please see: http://www.ncdc.noaa.gov/paleo/treeinfo.htmll
description: NOAA Template Raw Measurements file added 2021-02-22. July 2024: Elevation added by WDS-Paleo using get_elev_point() from the elevatr R package with the AWS Terrain Tiles (aws) and WGS 84 reference frame.
DOI: 10.25921/8yr3-yv74
title: NOAA/WDS Paleoclimatology - Southern Ocean Oligocene-Miocene Boundary Lipid Biomarker Data

description: Methane hydrate dissociation has long been considered as a mechanism for global carbon cycle perturbations, climate change and even mass extinctions in Earth’s history. However, direct evidence of hydrate destabilization and methane release coinciding with such events is scarce. Here we report the presence of diagnostic lipid biomarkers with depleted carbon isotopes from three sites in the Southern Ocean that are directly linked to methane release and subsequent oxidation across the Oligocene–Miocene boundary (23 million years ago). The biomarker evidence indicates that the hydrate destabilization was initiated during the peak of the Oligocene–Miocene boundary glaciation and sea-level low stand, consistent with our model results suggesting the decrease in hydrostatic pressure eroded the base of global methane hydrate stability zones. Aerobic oxidation of methane in seawater consumes oxygen and acidifies the ocean, acting as a negative feedback that perhaps facilitated the rapid and mysterious termination of glaciation in the early Miocene.
description: Lipid biomarker and compound-specific carbon isotope data from ODP Sites 1168 and 1170, and IODP U1356, across the Oligocene-Miocene Boundary. Diagnostic lipid biomarkers linked to methane cycling were screened from the late Oligocene - early Miocene sediment samples, to evaluate the potential role of marine methane hydrate system in the global carbon cycle and climate across the Oligocene-Miocene Boundary. Data includes glycerol dialkyl glycerol tetraether (GDGT) measurements and GDGT-based indexes (i.e., TEX86, Methane Index, Ring Index, BIT), as well as archaeal/bacterial lipid biomarkers and their compound-specific carbon isotope measurements.
DOI: 10.25921/8q1q-ac11
title: NOAA/WDS Paleoclimatology - Maxwell - Latimer Woods - LITU - ITRDB IN016

description: Urban forests have many positive effects on human health and recreation. However, urban areas can create stressful environments for native trees, leading to increased mortality and an altered ecosystem. Here, we compare growth variability and the climate response from old (>200 years) L. tulipifera growing in an urban forest in Bloomington, IN to surrounding non-urban sites in southern Indiana using dendrochronological techniques. We found that L. tulipifera growing in the urban forest responded similarly with small differences to climate compared to the non-urban sites. Radial growth from urban L. tulipifera had statistically similar correlation values with temperature, soil moisture, and precipitation compared to the trees in non-urban forests. Growth variability between the urban and non-urban L. tulipifera trees showed good agreement through time with the exception of the 20th century, where the urban forest experienced a stand-wide release from competition. Our results indicate that some urban forests may function similarly to non-urban forests from an ecological perspective. These findings suggest management practices from non-urban old-growth forest could be useful for management of rare urban old-growth forests.
description: Eastern Deciduous Forest, Climate response, Palmer Drought Severity Index, Urban NOAA Template Raw Measurements file added 2020-09-03.
DOI: 10.25921/871v-ry96
title: NOAA/WDS Paleoclimatology - Maxwell - Wesselman Woods - LITU - ITRDB IN028

description: Tree-ring reconstructions of streamflow can provide long-term perspectives of flow variability that may be useful in management strategies for water resources. Relative to other portions of the United States, there is a dearth of tree-ring based streamflow reconstructions in the Midwest. The Wabash River is an important water resource in Indiana and Illinois where many sectors rely on it. Here, to better understand the historic hydroclimate within the Wabash River Basin, we reconstructed June-September streamflow for a tributary of the Wabash River using three statistical approaches: the traditional basin approach, and the recently-developed climate-footprint, and drought-reconstruction approaches. Our reconstructions explained 53-71% of the variance for the common period (1941-1984). We find that in our three reconstructions, there are extreme droughts and pluvials that exceed those during the instrumental period, including a sustained five-decade low-flow event in the early 19th century. Overall, we find that the traditional basin approach produced the most robust model but had the shortest reconstruction length of the three approaches, as it requires the predictor chronologies to be derived from within the basin. Our results indicate that there are merits and drawbacks to each approach with the general pattern of sacrificing variance explained for reconstruction length.
description: Streamflow, Eastern Deciduous Forest NOAA Template Raw Measurements file added 2020-09-03.
DOI: 10.25921/8r4x-m393
title: NOAA/WDS Paleoclimatology - Peltier - Southwest Ecological Memory Project Site A6 - PPTR - ITRDB CO683

description: Trees are long-lived organisms that integrate climate conditions across years or decades to produce secondary growth. This integration process is sometimes referred to as 'climatic memory.' While widely perceived, the physiological processes underlying this temporal integration, such as the storage and remobilization of non-structural carbohydrates (NSC), are rarely explicitly studied. This is perhaps most apparent when considering drought legacies (perturbed post-drought growth responses to climate), and the physiological mechanisms underlying these lagged responses to climatic extremes. Yet, drought legacies are likely to become more common if warming climate brings more frequent drought. To quantify the linkages between drought legacies, climate memory and NSC, we measured tree growth (via tree ring widths) and NSC concentrations in three dominant species across the southwestern USA. We analyzed these data with a hierarchical mixed effects model to evaluate the time-scales of influence of past climate (memory) on tree growth. We then evaluated the role of climate memory and the degree to which variation in NSC concentrations were related to forward-predicted growth during the hot 2011-2012 drought and subsequent 4-year recovery period. Populus tremuloides exhibited longer climatic memory compared to either Pinus edulis or Juniperus osteosperma, but following the 2011-2012 drought, P. tremuloides trees with relatively longer memory of temperature conditions showed larger (more negative) drought legacies. Conversely, Pinus edulis trees with longer temperature memory had smaller (less negative) drought legacies. For both species, higher NSC concentrations followed more negative (larger) drought legacies, though the relevant NSC fraction differed between P. tremuloides and P. edulis. Our results suggest that differences in tree NSC are also imprinted upon tree growth responses to climate across long time scales, which also underlie tree resilience to increasingly frequent drought events under climate change.
description: These tree ring data were collected to assess the climate memory of tree growth around the southwestern US in "ecologically sampled" trees. Trees were from a range of size classes and vigors, but were all dominant or co-dominant. NOAA Template Raw Measurements file added 2022-04-04.
DOI: 10.25921/8gs9-jv75
title: NOAA/WDS Paleoclimatology - War Eagle Cave, Alabama 12,200 Year Stalagmite Stable Isotope Data

description: We present new high-resolution absolute-dated stalagmite δ18O and δ13C records from Alabama, southeastern United States (SE US), spanning the last 12 thousand years (ka). A local relationship between annual rainfall amount and its amount-weighed δ18O composition exists on interannual timescales, driven mostly by an amount effect during summer and spring seasons. Based on a novel quantitative interpretation of modern rainfall isotopic data, stalagmite δ18O variability is interpreted to reflect the relative contribution of summer and spring precipitation combined, relative to combined fall and winter precipitation. Precipitation amount in the SE US increases during an interval of 500 yr coeval with the Younger Dryas and during the 8.2 ka and Little Ice Age abrupt cooling events. High precipitation during these events reflects enhancement of spring and summer precipitation by 90% combined, relative to today's conditions, while the contribution of fall and winter rainfall remained unchanged or decreased slightly. Results from this study support model simulation results that suggest increased precipitation in the SE US during Atlantic Meridional Overturning Circulation (AMOC) slowdown/shutdown. In association with Northern Hemisphere mid-latitude cooling from the Early to mid-Holocene, annual precipitation in the SE US decreases, a pattern distinctive from that observed during abrupt cooling events related to AMOC shifts. Long-term hydroclimate change in the SE US is likely sensitive to summer insolation reduction as inferred to have occurred in other tropical and subtropical regions. The dynamical link between AMOC shutdown and precipitation variability in the SE US remains to be examined.
description: Stable isotope (d13C, d18O) data from stalagmite PPnda, War Eagle Cave, Alabama, for the past 122,200 years.
DOI: 10.13140/rg.2.2.22108.18563
title: Sarcoptes scabiei isolate IBGE_SS2 internal transcribed spacer 2, partial sequence
DOI: 10.13140/rg.2.2.25463.62882
title: InTech-Article_Stats 6000 down loads
DOI: 10.13140/rg.2.2.28819.07209
title: Sarcoptes scabiei microsatellite Sarms1 sequence
DOI: 10.15468/dl.97s6nw
title: Occurrence Download

description: A dataset containing 198038 species occurrences available in GBIF matching the query:
{
 "Geometry" : [
 "POLYGON ((-15.789 55.10336, -15.73386 55.20879, -15.67569 55.30392, -15.60644 55.40784, -15.5094 55.5381, -15.42364 55.64565, -15.34002 55.73895, -15.24186 55.84256, -15.13038 55.96435, -15.02071 56.0705, -14.91952 56.16854, -14.81591 56.25579, -14.6505 56.38545, -14.50387 56.48543, -14.353 56.58298, -14.44328 56.70174, -14.53114 56.81971, -14.60688 56.94167, -14.67801 57.06974, -14.74381 57.19979, -14.79834 57.33915, -14.8345 57.45615, -14.87209 57.60651, -14.89711 57.74934, -14.9123 57.93435, -14.9068 58.12258, -14.88681 58.2892, -14.85287 58.43341, -14.80864 58.5764, -14.75494 58.71328, -14.69025 58.84442, -14.60982 58.98692, -14.53464 59.09882, -14.41553 59.25511, -14.33346 59.34541, -14.19369 59.49921, -14.06081 59.62073, -13.91918 59.73962, -13.71986 59.88737, -13.52841 60.01238, -13.3023 60.14657, -13.58086 60.34371, -13.84575 60.55003, -14.00486 60.68816, -14.15085 60.66892, -14.32045 60.6392, -14.4411 60.61647, -14.65178 60.5579, -14.85023 60.50807, -15.109 60.44862, -15.39225 60.39092, -15.70943 60.3294, -16.16242 60.2565, -16.56083 60.20509, -17.01707 60.14725, -17.46524 60.10722, -20.9835 58.34189, -21.77198 57.86265, -22.17728 57.48826, -22.63517 57.23003, -24.68024 56.08732, -25.12904 55.41714, -25.34763 55.3604, -25.52763 55.20961, -25.88305 54.6164, -26.14615 54.23157, -25.46198 54.10649, -25.28264 54.10003, -24.9158 54.01519, -24.72343 54.24665, -24.11453 54.54973, -23.80499 54.57354, -23.26857 54.46339, -22.48867 55.01088, -21.66058 54.89923, -21.3856 54.62406, -22.06614 54.32211, -20.46941 52.06882, -15.90193 53.37002, -15.92028 53.50378, -15.9299 53.66376, -15.95875 53.77741, -15.97985 53.90549, -15.9944 54.01698, -16.00227 54.1424, -15.99985 54.31751, -15.98955 54.44232, -15.96531 54.59683, -15.92815 54.73818, -15.90323 54.82806, -15.87927 54.90099, -15.83723 54.99958, -15.789 55.10336))"
 ]
}

 The dataset includes 198038 records from 259 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0025104-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25921/8h9y-kh90
title: NOAA/WDS Paleoclimatology - Lake Mackenzie, Subtropical East Australian Glacial and Holocene Surface Air Temperature Reconstruction

description: Branched glycerol dialkyl glycerol tetraether (GDGT) distributions observed in a sediment core from Lake McKenzie were utilized to quantitatively reconstruct the pattern of mean annual air temperature (MAAT) from coastal subtropical eastern Australia between 37 and 18.3 cal ka BP and 14.0 cal ka BP to present. Both the reconstructed trend and amplitude of MAAT changes from the top of the sediment core were nearly identical to a local instrumental MAAT record from Fraser Island, providing confidence that in this sediment core branched GDGTs could be used to produce a quantitative record of past MAAT. The reconstructed trend of MAAT during 37 to 18.3 cal ka BP and timing of the Last Glacial Maximum (LGM) in the Lake McKenzie record were in agreement with previously published nearby marine climate records. The amplitude of lower-than-present MAAT during the LGM potentially provides information on the latitude of separation of the Tasman Front from the East Australian current in the subtropical western Pacific. The Lake McKenzie record shows an earlier onset of near modern day warm temperatures in the early Holocene compared to marine records and the presence of a warmer than present day period during the mid-Holocene.
description: This dataset was contributed as part of the Temperature-12k project (https://doi.org/10.25921/4RY2-G808). Data were contributed to the project from the original data generators, who are listed in the Investigator field of this template file. Additional notes regarding the use of these data in the Temperature-12k project can be found in the LiPD file listed as an Online_Resource of this template file.
DOI: 10.13140/rg.2.2.32541.51681
title: Finite Element Structural Analysis of Tensioned Cable Structures