4,495 research outputs found
ARC-Lake v1.1 - Ancillary
No full textARC-Lake v1.1 - Ancillary contains ancillary data products. This consists of the full resolution land/water mask used to determined where observations of Lake Surface Water Temperature (LSWT) and Lake Ice Cover (LIC) are derived and a reduced resolution version of this mask, corresponding to the resolution of the spatially resolved data products.
The methodology used to define this land/water mask is described in the ARC-Lake Algorithm Theoretical Basis Document (ARCLake_ATBD_v_1_1.pdf) and a description of the format of these data files is provided in the ARC-Lake Data Product Description document (ARCLake_DPD_v1_1_2.pdf).
Additional information about the ARC-Lake project and some basic data analysis tools can be found on the project website: http://www.geos.ed.ac.uk/arclake/
Please cite both this dataset and the related publication:
* "MacCallum, Stuart N; Merchant, Christopher J. (2011). ARC-Lake v1.1 - Ancillary, 1995-2009 [Dataset]. University of Edinburgh. School of GeoSciences / European Space Agency. https://doi.org/10.7488/ds/106."
* "MacCallum, S.N. and Merchant, C.J. (2012) Surface water temperature observations of large lakes by optimal estimation. Canadian Journal of Remote Sensing, 38 (1). pp. 25-45. ISSN 1712-7971 doi: 10.5589/m12-010"This dataset contains ancillary data for ARCLake v1.1 data products. It consists of the land/water mask, used to define the locations of the lakes, on two grids with different resolution. AL_LW_MASK_020.nc.zip - land/water mask on a 1/20 degree grid, AL_LW_MASK_120.nc.zip - land/water mask on a 1/120 degree grid
ATSR Reprocessing for Climate: Sea Surface Temperature (ARC-SST) v1.1 - Global 1 Degree Monthly Average - Obs4MIPs
Full text linkThis dataset contains observations of Sea Surface Temperature (SST) from the series of (Advanced) Along-Track Scanning Radiometers ((A)ATSRs). SSTs are provided as monthly averages on a 1 degree longitude/latitude global grid and cover the period from 1st January 1997 to 31st December 2011. Equivalent data for Sea Surface Temperature Anomaly (SSTA), relative to climatology, are also available.
The dataset is derived from the data products of the ATSR Reprocessing for Climate: Sea Surface Temperature (ARC-SST_ project (Merchant et al, 2012). These are daily SST estimates on a 0.1 degree longitude/latitude grid and the methods used to derive the monthly 1 degree dataset are described in the accompanying technical note (tosTechNote_ATSR_L3_ARC-v1.1.1_199701_201112.pdf).
The ARC-SST source data from which this dataset is derived is available at:
http://badc.nerc.ac.uk/view/neodc.nerc.ac.uk__ATOM__DE_3abf8c96-a7d6-11e0-9cb8-00e081470265
Reference: Merchant, C. J., O. Embury, N. A. Rayner, D. I. Berry, G. Corlett, K. Lean, K. L. Veal, E. C. Kent, D. Llewellyn-Jones, J. J. Remedios, and R. Saunders (2012), A twenty-year independent record of sea surface temperature for climate from Along Track Scanning Radiometers, J. Geophys. Res., 117, C12013, doi:10.1029/2012JC008400.Data: tos_ATSR_L3_ARC-v1.1.1_199701_201112.nc and tosAnom_ATSR_L3_ARC-v1.1.1_199701_201112.nc. Documentation: tosTechNote_ATSR_L3_ARC-v1.1.1_199701_201112.pdf
Effects of the basic multicellular unit and lamellar thickness on osteonal fatigue life
No full textA remodeling cycle sets the size of the osteon and associated lamellae in the basic multicellular unit. Treatments and aging affect these micro-structural features. We previously demonstrated decreased fatigue life with an unexplained mechanism and decreased osteon size in cortical bone treated with high-dose bisphosphonate. Here, three finite element models were examined: type-1: a single osteon, as a homogeneous unit and with heterogeneous lamellae and interlamellae, type-2: a control, interstitial-only tissue and type-3: the osteon with cement line, set within the interstitial tissue. Models were loaded in simulated, sinusoidal bending fatigue. As osteon size was decreased, lamellar number and lamellar thickness were incrementally adjusted for each model. As hypothesized, lamellae within the larger type-1 models attained greater cycles to failure and the addition of an osteon to type-2 models (generating a type-3 model set) yielded increased fatigue life. However, as the osteon size was decreased, the potential for compressive damage nucleation was increased within the lamellae of the osteons versus the interstitium. Also, osteons with fewer, thicker lamellae displayed increased fatigue life. Osteonal microstructure plays a role in damage initiation location, especially when BMU size is smaller. Previous findings by us and others could partially be explained by this further understanding of increased probability for damage nucleation in smaller osteons.Peer reviewe
ARC-Lake v1.1 - Per-Lake
No full textARC-Lake v1.1 - Per-Lake contains data products on a lake-by-lake basis. These data products contain observations of Lake Surface Water Temperature (LSWT) and Lake Ice Cover (LIC) from the series of (Advanced) Along-Track Scanning Radiometers ((A)ATSRs). ARC-Lake v1.1 data products cover the period from 1st June 1995 to 31st December 2009.
A number of different data products are available for each lake and are grouped together into a zip archive for each lake. A summary of the types of data product available is given on http://datashare.is.ed.ac.uk/handle/10283/88 and full details of the file naming convention and file contents are given in the ARC-Lake Data Product Description document (ARCLake_DPD_v1_1_2.pdf). Individual lake archives are grouped into larger zip archives by continent (with the exception of the Caspian Sea). A full listing of each zip archive is provided in the ARC-Lake Data Product File List (ARCLake_DPFL_v1_1_2.pdf). Details of the methods used and a list of all lakes and their locations are given in the ARC-Lake Algorithm Theoretical Basis Document (ARCLake_ATBD_v_1_1.pdf).
Additional information about the ARC-Lake project and some basic data analysis tools can be found on the project website: http://www.geos.ed.ac.uk/arclake .
Please cite both this dataset and the related publication:
* "MacCallum, Stuart N; Merchant, Christopher J. (2011). ARC-Lake v1.1 - Per-Lake, 1995-2009 [Dataset]. University of Edinburgh. School of GeoSciences / European Space Agency. https://doi.org/10.7488/ds/159."
* "MacCallum, S.N. and Merchant, C.J. (2012) Surface water temperature observations of large lakes by optimal estimation. Canadian Journal of Remote Sensing, 38 (1). pp. 25-45. ISSN 1712-7971 doi: 10.5589/m12-010"This dataset contains data products on a lake-by-lake basis. Lakes have been grouped by continents in the following zip archives: ARCLake_africa.zip - data products for lakes in Africa, ARCLake_asia_oceania.zip - data products for lakes in Asia/Oceania, ARCLake_europe.zip - data products for lakes in Europe, ARCLake_great_lakes.zip - data products for the North American Great Lakes, ARCLake_n_america.zip - data products for all other lakes in North America, ARCLake_s_america.zip - data products for lakes in South America. Due to size limitations, data products for the Caspian Sea are stored separately across two zip archives: ALID0001_OBS.zip (observations) and ALID0001_REC.zip (reconstructions). Documentation is provided in the following files: ARCLake_DPFL_v1_1_2.pdf - A full listing of the contents of each of the zip archives. ARCLake_DPD_v1_1_2.pdf - Detailed description of all data products. ARC-Lake-ATBD-v1.0.pdf - Algorithm theoretical basis document (ATBD)
ARC-Lake v1.1 - Global
No full textARC-Lake v1.1 - Global contains data products with global coverage, i.e. data for all (available) lakes are included in each product. These data products contain observations of Lake Surface Water Temperature (LSWT) and Lake Ice Cover (LIC) from the series of (Advanced) Along-Track Scanning Radiometers ((A)ATSRs). ARC-Lake v1.1 data products cover the period from 1st June 1995 to 31st December 2009.
A number of different data products are available and are grouped together into six zip archives, by product type. A summary of the types of data product available is given on http://datashare.is.ed.ac.uk/handle/10283/88 and full details of the file naming convention and file contents are given in the ARC-Lake Data Product Description document (ARCLake_DPD_v1_1_2.pdf). Note that not all types of data product available on a per-lake basis are available as a global product. A full listing of each zip archive is provided in the ARC-Lake Data Product File List (ARCLake_DPFL_v1_1_2.pdf). Details of the methods used and a list of all lakes and their locations are given in the ARC-Lake Algorithm Theoretical Basis Document (ARCLake_ATBD_v_1_1.pdf).
Additional information about the ARC-Lake project and some basic data analysis tools can be found on the project website: http://www.geos.ed.ac.uk/arclake/
Please cite both this dataset and the related publication:
* "MacCallum, Stuart N; Merchant, Christopher J. (2011). ARC-Lake v1.1 - Global, 1995-2009 [Dataset]. University of Edinburgh. School of GeoSciences / European Space Agency. https://doi.org/10.7488/ds/160."
* "MacCallum, S.N. and Merchant, C.J. (2012) Surface water temperature observations of large lakes by optimal estimation. Canadian Journal of Remote Sensing, 38 (1). pp. 25-45. ISSN 1712-7971 doi: 10.5589/m12-010"This dataset contains global data products (i.e. all lakes, where available, are included in each data file). The dataset is stored across 6 zip archives, covering unaveraged observation based data and averaged reconstruction based data. Details of the zip archive contents are as follows: ALID9999_DGOBS2D.zip - unaveraged observations for day-time ATSR2, ALID9999_DGOBS2N.zip - unaveraged observations for night-time AATSR observations, ALID9999_DGOBS3D.zip - unaveraged observations for day-time ATSR2, ALID9999_DGOBS3N.zip - unaveraged observations for night-time AATSR
ARC-Lake v2.0 - Per-Lake
No full textARC-Lake v2.0 - Per-Lake contains data products on a lake-by-lake basis. These data products contain observations of Lake Surface Water Temperature (LSWT) and Lake Ice Cover (LIC) from the series of (Advanced) Along-Track Scanning Radiometers ((A)ATSRs). ARC-Lake v2.0 data products cover the period from 1st August 1991 to 31st December 2011.
A number of different data products are available for each lake and are grouped together into a zip archive for each lake. A summary of the types of data product available is given on http://datashare.is.ed.ac.uk/handle/10283/88 and full details of the file naming convention and file contents are given in the ARC-Lake Data Product Description document (ARCLake_DPD_v1_1_2.pdf). Individual lake archives are grouped into larger zip archives by continent (with the exception of the Caspian Sea). Details of the methods used and a list of all lakes and their locations are given in the ARC-Lake Algorithm Theoretical Basis Document (ARC-Lake-ATBD-v1.3.pdf).
Additional information about the ARC-Lake project and some basic data analysis tools can be found on the project website: http://www.geos.ed.ac.uk/arclake
Please cite both this dataset and the related publication:
* "MacCallum, Stuart N; Merchant, Christopher J. (2013). ARC-Lake v2.0 - Per-Lake, 1991-2011 [Dataset]. University of Edinburgh. School of GeoSciences / European Space Agency. https://doi.org/10.7488/ds/161."
* "MacCallum, S.N. and Merchant, C.J. (2012) Surface water temperature observations of large lakes by optimal estimation. Canadian Journal of Remote Sensing, 38 (1). pp. 25-45. ISSN 1712-7971 doi: 10.5589/m12-010"This dataset contains data products on a lake-by-lake basis. Lakes have been grouped by continents in the following zip archives: ARCLake_africa.zip - data products for lakes in Africa, ARCLake_asia_oceania.zip - data products for lakes in Asia/Oceania, ARCLake_europe.zip - data products for lakes in Europe, ARCLake_great_lakes.zip - data products for the North American Great Lakes, ARCLake_n_america.zip - data products for all other lakes in North America, ARCLake_s_america.zip - data products for lakes in South America, ALID0001.zip - data products for the Caspian Sea. ARCLake_DPD_v1_1_2.pdf - Detailed description of all data products. ARC-Lake-ATBD-v1.3.pdf - Algorithm theoretical basis document (ATBD)
Stability Assessment of the (A)ATSR Sea Surface Temperature Climate Dataset from the European Space Agency Climate Change Initiative
Full text linkSea surface temperature is a key component of the climate record, with multiple independent records giving confidence in observed changes. As part of the European Space Agencies (ESA) Climate Change Initiative (CCI) the satellite archives have been reprocessed with the aim of creating a new dataset that is independent of the in situ observations, and stable with no artificial drift (<0.1 K decade−1 globally) or step changes. We present a method to assess the satellite sea surface temperature (SST) record for step changes using the Penalized Maximal t Test (PMT) applied to aggregate time series. We demonstrated the application of the method using data from version EXP1.8 of the ESA SST CCI dataset averaged on a 7 km grid and in situ observations from moored buoys, drifting buoys and Argo floats. The CCI dataset was shown to be stable after ~1994, with minimal divergence (~0.01 K decade−1) between the CCI data and in situ observations. Two steps were identified due to the failure of a gyroscope on the ERS-2 satellite, and subsequent correction mechanisms applied. These had minimal impact on the stability due to having equal magnitudes but opposite signs. The statistical power and false alarm rate of the method were assessed
Chronic High Fructose Intake Reduces Serum 1,25(OH)<sub>2</sub>D<sub>3</sub>Levels in Calcium-Sufficient Rodents
No full textExcessive fructose consumption inhibits adaptive increases in intestinal Ca2+transport in lactating and weanling rats with increased Ca2+requirements by preventing the increase in serum levels of 1,25(OH)2D3. Here we tested the hypothesis that chronic fructose intake decreases 1,25(OH)2D3 levels independent of increases in Ca2+ requirements. Adult mice fed for five wk a high glucose-low Ca2+ diet displayed expected compensatory increases in intestinal and renal Ca2+ transporter expression and activity, in renal CYP27B1 (coding for 1α-hydroxylase) expression as well as in serum 1,25(OH)2D3 levels, compared with mice fed isocaloric glucose- or fructose-normal Ca2+ diets. Replacing glucose with fructose prevented these increases in Ca2+ transporter, CYP27B1, and 1,25(OH)2D3 levels induced by a low Ca2+ diet. In adult mice fed for three mo a normal Ca2+ diet, renal expression of CYP27B1 and of CYP24A1 (24-hydroxylase) decreased and increased, respectively, when the carbohydrate source was fructose instead of glucose or starch. Intestinal and renal Ca2+ transporter activity and expression did not vary with dietary carbohydrate. To determine the time course of fructose effects, a high fructose or glucose diet with normal Ca2+ levels was fed to adult rats for three mo. Serum levels of 1,25(OH)2 D3 decreased and of FGF23 increased significantly over time. Renal expression of CYP27B1 and serum levels of 1,25(OH)2D3 still decreased in fructose- compared to those in glucose-fed rats after three mo. Serum parathyroid hormone, Ca2+ and phosphate levels were normal and independent of dietary sugar as well as time of feeding. Thus, chronically high fructose intakes can decrease serum levels of 1,25(OH)2D3 in adult rodents experiencing no Ca2+ stress and fed sufficient levels of dietary Ca2+. This finding is highly significant because fructose constitutes a substantial portion of the average diet of Americans already deficient in vitamin D.Peer reviewe
Pannexin-1 and P2X7-Receptor Are Required for Apoptotic Osteocytes in Fatigued Bone to Trigger RANKL Production in Neighboring Bystander Osteocytes
No full textOsteocyte apoptosis is required to induce intracortical bone remodeling after microdamage in animal models, but how apoptotic osteocytes signal neighboring “bystander” cells to initiate the remodeling process is unknown. Apoptosis has been shown to open pannexin-1 (Panx1) channels to release adenosine diphosphate (ATP) as a “find me” signal for phagocytic cells. To address whether apoptotic osteocytes use this signaling mechanism, we adapted the rat ulnar fatigue-loading model to reproducibly introduce microdamage into mouse cortical bone and measured subsequent changes in osteocyte apoptosis, receptor activator of NF-kB ligand (RANKL) expression and osteoclastic bone resorption in wild-type (WT; C57Bl/6) mice and in mice genetically deficient in Panx1 (Panx1KO). Mouse ulnar loading produced linear microcracks comparable in number and location to the rat model. WT mice showed increased osteocyte apoptosis and RANKL expression at microdamage sites at 3 days after loading and increased intracortical remodeling and endocortical tunneling at day 14. With fatigue, Panx1KO mice exhibited levels of microdamage and osteocyte apoptosis identical to WT mice. However, they did not upregulate RANKL in bystander osteocytes or initiate resorption. Panx1 interacts with P2X7R in ATP release; thus, we examined P2X7R-deficient mice and WT mice treated with P2X7R antagonist Brilliant Blue G (BBG) to test the possible role of ATP as a find-me signal. P2X7RKO mice failed to upregulate RANKL in osteocytes or induce resorption despite normally elevated osteocyte apoptosis after fatigue loading. Similarly, treatment of fatigued C57Bl/6 mice with BBG mimicked behavior of both Panx1 KO and P2X7RKO mice; BBG had no effect on osteocyte apoptosis in fatigued bone but completely prevented increases in bystander osteocyte RANKL expression and attenuated activation of resorption by more than 50%. These results indicate that activation of Panx1 and P2X7R are required for apoptotic osteocytes in fatigued bone to trigger RANKL production in neighboring bystander osteocytes and implicate ATP as an essential signal mediating this process.Peer reviewe
Data for Thermodynamics of proton insertion across the perovskite-brownmillerite transition in La0.5Sr0.5CoO3-δ
No full textThe `protonation-of-lsco` zip includes the plots which appear in our manuscript, along with the data and scripts used to generate them. In addition to the structures, energies, and other data related to host, oxygen vacancy, and hydrogen interstitial structures of La0.5Sr0.5CoO3-δ (and SrCoO2.5), metadata (e.g., INCAR settings) related to the first-principle calculations is included in the data files. Each subfolder (`scripts`, `figures`, `dos_data`, and `data`) contains a detailed README.md file that provides additional information related to the files contained within.This repository exists to share the data and scripts used in the paper "Thermodynamics of proton insertion across the perovskite-brownmillerite transition in La0.5Sr0.5CoO3-δ" by Armand J. Lannerd, Nathan J. Szymanski, and Christopher J. Bartel. The files are contained in the folder `protonation-of-lsco` with additional detailed information presented in the `README.md` files of each subfolder (`scripts`, `figures`, `dos_data`, and `data`).This work was supported primarily by the National Science Foundation through the University of Minnesota MRSEC under Award Number DMR-2011401. This material is based upon work partially supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. 2237827. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. The authors acknowledge the Minnesota Supercomputing Institute (MSI) at the University of Minnesota for providing resources that contributed to the research results reported within this paper.Lannerd, Armand J; Szymanski, Nathan J; Bartel, Christopher J. (2026). Data for Thermodynamics of proton insertion across the perovskite-brownmillerite transition in La0.5Sr0.5CoO3-δ. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/5etj-a120
- …
