Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
38
datasets available to search
ShareScore release 0.9.0
Dataset results
38 results for “Freeze study”
Hubbard Brook Experimental Forest: Soil Freezing Study (SFS) In Situ Measurements of Snow and Soil Frost Depth
Climate models for the northeastern United States (U.S.) over the next century predict an increase in air temperature between 2.8 and 4.3 °C and a decrease in the average number of days per year when a snowpack will cover the forest floor (Hayhoe et al. 2007, 2008; Campbell et al. 2010). Studies of forest dynamics in seasonally snow-covered ecosystems have been primarily conducted during the growing season, when most biological activity occurs. However, in recent years considerable progress has been made in our understanding of how winter climate change influences dynamics in these forests. The snowpack insulates soil from below-freezing air temperatures, which facilitates a significant amount of microbial activity. However, a smaller snowpack and increased depth and duration of soil frost amplify losses of dissolved organic C and NO3- in leachate, as well as N2O released into the atmosphere. The increase in nutrient loss following increased soil frost cannot be explained by changes in microbial activity alone. More likely, it is caused by a decrease in plant nutrient uptake following increases in soil frost. We conducted a snow-removal experiment at Hubbard Brook Experimental Forest to determine the effects of a smaller winter snowpack and greater depth and duration of soil frost on trees, soil microbes, and arthropods. A number of publications have been based on these data: Comerford et al. 2013, Reinmann et al. 2019, Templer 2012, and Templer et al. 2012. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station. Campbell JL, Ollinger SV, Flerchinger GN, Wicklein H, Hayhoe K, Bailey AS. Past and projected future changes in snowpack and soil frost at the Hubbard Brook Experimental Forest, New Hampshire, USA. Hydrological Processes. 2010; 24:2465–2480. Comerford DP, PG Schaberg, PH Te
Hubbard Brook Experimental Forest: Soil Freeze Study - Tree Growth
The climate is changing in many temperate forests with the amount of forest area dominated by sugar maple experiencing an insulating snowpack expected to shrink between 49 and 95% compared to 1951-2005 values. A reduced snowpack and increased depth and duration of soil frost can injure or kill fine roots, which are essential for plant water and nutrient uptake. These adverse impacts on tree roots can have important impacts on tree growth and ecosystem carbon sequestration. We evaluated the effects of changing winter climate, including snow and soil frost dynamics, by using tree cores to measure sugar maple radial growth rates in the Soil Freezing Study plots at the Hubbard Brook Experimental Forest. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station. Analysis of these data are published in: Reinmann AB, Susser JR, Demara EMC, and Templer PH. 2019. Declines in northern forest tree growth following snowpack decline and soil freezing. Global Change Biology. 25(2):420-430. https://doi.org/10.1111/gcb.14420
Model output from "The chance of freezing – a conceptional study to parameterize temperature-dependent freezing by including randomness of ice-nucleating particle concentrations"
<p>Model output from "The chance of freezing – a conceptional study to parameterize temperature-dependent freezing by including randomness of ice-nucleating particle concentrations", accepted for publication in Atmospheric Chemistry and Physics, 2023, same authors.<br> The simulations were done using MIMICA version4 (Savre at el., 2014) and the data includes all model output presented in the publication.</p>
Study on the supercooling characteristics of freezing soil based on nucleation theory
<p>Abstract</p> <p>The clarification of freezing in a soil-water system is critical for assessing the formation of a freezing zone and liquid water flow. The supercooling phenomenon of soil pore solutions has been found during the freezing process, but the mechanism remains poorly understood. In this study, we propose a free energy function of soil-water systems based on the Classical Nucleation Theory (CNT). The analytical solution of the critical nucleation problem of saline soil-water system is obtained by combining the initial freezing temperature model and Pitzer activity coefficients model in electrolyte solutions. Then, the freezing-thawing experiments of saline soil with various salt contents were conducted for verifying the analytical solution. The derived boundary nucleation rate is the quantitative solution of the critical condition for the supercooling. The findings suggested that the theory results agreed well with the experiment results. For the salt-free soil-water system, the critical maximum radius of supercooling was 7.15 nm. We compared eight classical ice-water interfacial tension models, and the “Reinhardt & Doye” and “DeMott & Rogers” models showed excellent performance when using the new free energy theoretical framework to predict the crystallization nucleation rate of soil-water systems. A positive correlation between the boundary nucleation rate and soil-water potential is detected. According to the influencing factors, the boundary nucleation rate of soil-water system can be divided into three zones: salt nature control zone (R>100μm), salt-pore mixed control zone (100μm>R>100nm), and pore size control zone (R<100nm).</p> <p>Plain Language Summary</p> <p>Unfrozen water refers to the soil moisture that still exists in the form of liquid water in the soil at negative temperatures, which is critical for determining the material properties of frozen soil. The phenomenon of soil water not being able to freeze as soon as the temperature falls below the freezing temperature is referred to as “supercooling”. However, the critical condition of supercooling is still unclear. In this paper, we developed a nucleation model that can be applied to saline soils based on the thermodynamic approach. Subsequently, the critical conditions were verified by freezing-thawing tests of soil samples with different salt contents. We further optimized the model of this paper by selecting the best model for the intermediate variables. Quantitative relationships between the initiation condition of supercooling and soil properties were established. We also delineated pore size intervals for distinguishing differences in supercooling properties at different pore sizes. The proposed theoretical framework is developed from Classical Nucleation Theory, which may provide a theoretical reference for revealing the freezing-thawing mechanism of soil-water systems.</p>
Sap Flow in the Soil Freezing Study at the Hubbard Brook Experimental Forest, 2010
The climate is changing in many temperate forests with the amount of forest area dominated by sugar maple experiencing an insulating snowpack expected to shrink between 49 and 95% compared to 1951-2005 values. A reduced snowpack and increased depth and duration of soil frost can injure fine roots, which are essential for plant water uptake. Water uptake is a crucial component of ecosystem functioning because this process strongly impacts other biological processes, such as primary productivity and nutrient uptake. We evaluated the effects of changing winter climate, including snow and soil frost dynamics, by measuring sap flow rates in the Soil Freezing Study plots at the Hubbard Brook Experimental Forest. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station. Analysis of these data are published in: Harrison, J.L., Reinmann, A.B., Maloney, A.S. et al. Transpiration of Dominant Tree Species Varies in Response to Projected Changes in Climate: Implications for Composition and Water Balance of Temperate Forest Ecosystems. Ecosystems (2020). https://doi.org/10.1007/s10021-020-00490-y
Dataset for the Figure 2 in manuscript "Numerical study of coupled water and vapour flow, heat transfer, and solute transport in variably-saturated deformable soil during freeze-thaw cycles"
<p>This dataset includes the gathered experimental measurements of a freezing test by Wu (2017) for the model's verification shown in Figure 2 of the manuscript entitled 'Numerical study of coupled water and vapour flow, heat transfer, and solute transport in variably-saturated deformable soil during freeze-thaw cycles'' by Huang, X., and Rudolph, D.L.</p>
Data from: High sensitivity of herbaceous legumes to freezing: insights from a multi-year snow removal study
Open the record for dataset details and reuse information.
Variability in soil and litter arthropod populations in the Soil Freezing Study plots at the Hubbard Brook Experimental Forest, 2009-2010
Climate models for the northeastern United States (U.S.) over the next century project an increase in air temperature between 2.8 and 4.3 °C and a decrease in the average number of days per year when a snowpack will cover the forest floor. Warmer temperatures may benefit some litter arthropods by allowing them to expand their ranges and to increase their rates of reproduction. However, a reduction in snowpack depth and duration could offset these changes and lead to increased arthropod mortality because the snowpack plays an important role in insulating arthropods from freezing temperatures. We evaluated these potential changes by measuring arthropod abundance in the Soil Freezing Study plots at the Hubabard Brook Experimental Forest. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Simulation outputs for the study on the transition from freezing rain to ice pellets during WINTRE-MIX IOP4
<p>Simulation outputs used in the study that investigates the transition from freezing rain to ice pellets during WINTRE-MIX IOP4. The name of each zip file represents the corresponding simulation described in the manuscript (i.e., CTL, MYJ, and MYJ_HM simulations). Due to the size limit, only variables used in the study are uploaded.</p>
FREEZE Cohort Study
ClinicalTrials.gov study NCT01360008. IPD Sharing: NO. Countries: 6. Publications: 5.
FreezIng bReaST Cancer in Brazil: a Before-after Study
ClinicalTrials.gov study NCT05398497. IPD Sharing: YES. Countries: 1. Publications: 0.
A Phase Ib Study of the Recombinant Mycobacterium Tuberculosis Vaccine Freeze-dried (AEC/BC02)
ClinicalTrials.gov study NCT04239313. IPD Sharing: Not stated. Countries: 1. Publications: 3.
The Effects of Freeze-Dried Whole Grape Powder on Chronic Disease and Cardiovascular Risk Factors-a Pilot Study
ClinicalTrials.gov study NCT06006182. IPD Sharing: NO. Countries: 1. Publications: 4.
Study Comparing Outcomes Between Conventional IVF and a "Freeze-all"-Strategy in Assisted Reproductive Technology
ClinicalTrials.gov study NCT02746562. IPD Sharing: NO. Countries: 1. Publications: 5.
Efficacy of Deep-coil Based Repetitive Transcranial Magnetic Stimulation in the Treatment of Parkinson's Disease With Freezing of Gait and Its Neural Regulation Mechanism Study of Resting-state Cerebr
ClinicalTrials.gov study NCT06888778. IPD Sharing: NO. Countries: 1. Publications: 1.
A Randomized Controlled Study of Prolonging the Time of Progesterone Supplementation to Improve the Pregnancy Outcome of Single Day 6 Blastocyst Transfer of Freeze-thaw Cycle
ClinicalTrials.gov study NCT04938011. IPD Sharing: Not stated. Countries: 1. Publications: 1.
A Study in Infants to Test Two Preparations (Freeze-dried or Liquid) of the Rotavirus Vaccine (HRV Vaccine).
ClinicalTrials.gov study NCT00382772. IPD Sharing: YES. Countries: 1. Publications: 1.
Etiology-Phenotype-Outcome Pathway Study on Freezing of Gait (FOG)
ClinicalTrials.gov study NCT07386015. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
FREEZE-AFIB Post-Market Study
ClinicalTrials.gov study NCT05089877. IPD Sharing: NO. Countries: 1. Publications: 0.
Efficacy Study of Amantadine to Treat Gait Dysfunction and Freezing in Parkinson's Disease
ClinicalTrials.gov study NCT01652534. IPD Sharing: NO. Countries: 1. Publications: 0.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.