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45 results for “Arctic Observing”
Low-level mixed-phase clouds at the high Arctic site of Ny-Ålesund: A comprehensive long-term dataset of remote sensing observations
<p>This dataset contains a comprehensive set of quality-controlled remote sensing observations of low-level mixed-phase clouds collected at the high Arctic site of Ny-Ålesund, between 10 October 2021 and 31 December 2022. Cornerstones of the dataset are observations from a 35-GHz polarimetric scanning Doppler cloud radar and a 94-GHz zenith-pointing Doppler cloud radar. Radar data are complemented with thermodynamic retrievals from a microwave radiometer, liquid base height from a ceilometer and wind fields from large-eddy simulations. All data have undergone extensive quality control, especially the cloud radar data, which are accurately calibrated, matched, and corrected for gas and liquid-hydrometeor attenuation, ground clutter and range folding. This dataset is especially suited for cloud microphysical studies, and the high number of events included allows for the compiling of robust statistics. The dataset is accompanied by a data descriptor article, which is available at <a href="https://doi.org/10.5194/essd-15-5427-2023" target="_blank" rel="noopener">doi.org/10.5194/essd-15-5427-2023</a>.</p> <p> </p> <p><strong>Dataset overview</strong><br>The files include only low-level mixed-phase cloud (LLMPC) events, as well as the 2 hours preceding and following events. Each file contains an individual event, unless multiple events are less than 4 hours apart, in which case they are combined into the same file. LLMPC events are detected by requiring that ice and liquid phase coexist in a cloud layer with top below 2500 m for at least one hour. All radar variables observed in zenith (Doppler moments at 35 and 94 GHz, linear depolarization ratio (LDR) at 35 GHz), as well as microwave radiometer retrievals (temperature (T), liquid water path (LWP), integrated water vapor (IWV)), liquid base height from the ceilometer, and model data (horizontal wind speed and direction) are brought to the same time and range grids (respectively named ‘time_zen’ and ‘range_zen’ in the files). Off-zenith radar variables (reflectivity, differential reflectivity (ZDR), maximum spectral ZDR (sZDRmax), correlation coefficient (RhoHV), differential phase shift (PhiDP), and specific differential phase (KDP)) are stored on separate coordinates (named ‘time_slant’ and ‘range_slant’). All derived corrections are already applied to the data, and stored in the files, in case the user is interested in reconstructing the original data. A number of flags have been included in the files: in particular ‘MPC_detected’ indicates whether a LLMPC event was detected, and ‘liquid_attenuation_correction_flag_zen’ and ‘liquid_attenuation_correction_flag_slant’ indicate whether radar reflectivities were corrected for attenuation due to liquid hydrometeors. Liquid attenuation corrections should be especially taken into account when computing the dual-wavelength ratio (i.e., the difference between reflectivity at 35 GHz and at 94 GHz, both expressed in dBZ), and performing quantitative analyses of reflectivity fields.</p>
Supplement to "Low-level mixed-phase clouds at the high Arctic site of Ny-Ålesund: A comprehensive long-term dataset of remote sensing observations"
<p>This dataset is a supplement to "Low-level mixed-phase clouds at the high Arctic site of Ny-Ålesund: A comprehensive long-term dataset of remote sensing observations", available at <a href="http://doi.org/10.5281/zenodo.7803064">doi.org/10.5281/zenodo.7803064</a>. The additional variables here included are: slow edge velocity, fast edge velocity, and eddy dissipation rate (EDR). All variables are stored on the same time and range grids adopted for the main dataset. Similarly, the event selection and file structure are identical to those of the main dataset.<br><br>Slow and fast edge velocities are derived from Doppler spectra recorded by the zenith-pointing 94-GHz cloud radar. The slow (fast) edge velocity is calculated as the velocity associated with the slowest (fastest) Doppler bin above the peak noise level, belonging to a spectral cluster whose width is at least 5 Doppler bins.<br><br>The EDR is retrieved following the approach by Borque et al. (2016; <a href="http://doi.org/10.1002/2015JD024543">doi.org/10.1002/2015JD024543</a>), using as input the slow edge velocity, and model horizontal wind speed from the main dataset. EDR is retrieved in 5 minute intervals, up to a maximum range of 3 km.<br><br>The detailed documentation of the variables here included can be found in the Supporting Information to the following publication: <a href="https://doi.org/10.1029/2023GL106599" target="_blank" rel="noopener">doi.org/10.1029/2023GL106599</a>.</p>
Observation and modeling of high-7Be events in Northern Europe associated with the instability of the Arctic polar vortex in early 2003
<p>Data repository for paper: "Observation and modeling of high-7Be events in Northern Europe associated with the instability of the Arctic polar vortex in early 2003"</p> <p>Erika Brattich; Hongyu Liu; Bo Zhang; Miguel Angel Hernandez-Ceballos; Jussi Paatero; Darko Sarvan; Vladimir Djurdjevic; Laura Tositti; Jelena Ajtić, submitted to Atmospheric Chemistry and Physics, October 2020</p> <p>Created by Erika Brattich (erika.brattich@unibo.it), October 2020</p> <p>-> Data</p> <p>- Pb210_2sites.csv contains daily 210Pb observations at Helsinki and Sodankyla in the period January-March 2003. Dates are in "m/d/yyyy" format and 210Pb measurements are in µBq/m³.</p> <p>Please refer to Mattson et al. (1996) for details.</p> <p>-> Model output</p> <p>- trac_avg.merra2_2x25_RnPbBe.200301-200303-monthly-means.bpch.gz: contains model output of monthly mean 210Pb and 7Be concentrations for January, February, and March 2003.</p> <p>- ts_1h.200301.bpch.tar: hourly model output for January 2003</p> <p>- ts_1h.200302.bpch.tar: hourly model output for February 2003</p> <p>- ts_1h.200303.bpch.tar: hourly model output for March 2003</p> <p>- diaginfo.dat, tracerinfo.dat: information data files needed for the GAMAP package (in IDL) used to read and process the model output. GAMAP is publicly available at: <a href="http://acmg.seas.harvard.edu/gamap/">http://acmg.seas.harvard.edu/gamap/</a> </p> <p>References:</p> <p>Mattsson, R., Paatero, J., and Hatakka, J.: Automatic Alpha/Beta Analyser for Air Filter Samples - Absolute Determination of Radon Progeny by Pseudo-coincidence Techniques, Radiat. Prot. Dosim., 63, 133-139, doi:10.1093/oxfordjournals.rpd.a031520, 1996.</p> <p> </p> <p> </p>
Using satellite observations to evaluate model microphysical representation of Arctic mixed-phase clouds
<p>This is data from several atmosphere-only GCM experiments used to investigate the impacts of changing mixed-phase microphysical parameters in the CAM6 atmospheric model. Details and results from these simulations is presented in the submitted manuscript "Using satellite observations to evaluate model microphysical representation of Arctic mixed-phase clouds". A preprint of this manuscript can be found at https://www.essoar.org/doi/10.1002/essoar.10506728.2.</p> <p>An included README file describes organization of files. For any questions, please contact jonah.shaw@colorado.edu.</p>
Fig. 2 in Observations ofApparent LoricaVariability inSalpingacantha (Ciliophora: Tintinnida) in the Northern Pacific and Arctic Oceans
Fig. 2. Varieties of Salpingacantha from a 2016 sample in the Chuk- chi Sea (2016 St 29). In the sample no typical Salpingella acuminata were found. In the conspectus of Kofoid and Campbell (1929) the form "a" most closely resembles S. ampla, "b" S. unguiculata, "c" S. simplex, "d" S. perca, and "e" S. crenulata. Note that form "c" if rotated 45° could easily be mistaken for Salpingella acuminata.
Fig. 1 in Observations ofApparent LoricaVariability inSalpingacantha (Ciliophora: Tintinnida) in the Northern Pacific and Arctic Oceans
Fig. 1. Varieties of Salpingacantha from a 2015 sample in the Chuk- chi Sea (2015 St 5). In the sample, typical Salpingella acuminata ("a") were dominant with 70 cells found for the 15 Salpingacantha cells encountered. The "b" most closely corresponds with S. crenulata, "c" and "d" with S. perca, "e" with S. unguiculata and "f" with S. ampla. Note that form "e", if rotated 45°, could easily be mistaken for Salpingella acuminata.
Fig. 3 in Observations ofApparent LoricaVariability inSalpingacantha (Ciliophora: Tintinnida) in the Northern Pacific and Arctic Oceans
Fig. 3. The illustrations of Salpingacantha species from Kofoid and Campbell 1929 arranged as the evolutionary series given in Kofoid & Campbell 1939 in which S. perca "presents the earliest phase in evolution of toothed oral margin": a. S. perca, b. S. crenulata, c. S. exilis, d. S. simplex, e. S. unguiculata, f. S. ampla, and g. S. undata. Note that S. perca, S. exilis, and S. unguiculata are depicted with a diaphragm apparatus similar to those of Salpingella (Agatha 2010).
Fig. 2 in New observations of Papulifères, putative ciliate cysts, from the plankton of the Chukchi Sea (Western Arctic Ocean) in August of 2023
Fig. 2. New forms of Papulifères found in samples from the Chukchi Sea region taken in August 2023. Forms A–D are new spindle-shaped Fusopsis forms, and Forms E–H are new spherical or oblong-shaped Sphaeropsis forms. Morphology notes and stations in which each were found along with the nominal concentrations found in the samples are given in Table 2.
Fig. 1 in New observations of Papulifères, putative ciliate cysts, from the plankton of the Chukchi Sea (Western Arctic Ocean) in August of 2023
Fig. 1. Map of the Western Arctic Ocean showing the 36 station locations sampled using a 20 µm mesh plankton net in the Chukchi Sea region during August of 2023. Note that station locations yielding samples in which Papulifère, putative ciliate cysts forms, were found (putative cyst stations) were located throughout the region sampled. Detailed station characteristics are given in Table 1.
Table 2 in New observations of Papulifères, putative ciliate cysts, from the plankton of the Chukchi Sea (Western Arctic Ocean) in August of 2023
<p><b>Table 2</b>. The morphological characteristics and sample data (stations and nominal concentrations) of the apparently new Papulifère forms found in the samples taken in 2023. LD refers to longest dimension of the main body (excluding filaments if present). In Morphology Notes, ‘Differs from fig. x.x’ refer to the figures in Dolan et al. 2023; figures are also given in the Supplementary File.</p><table><thead><tr><th>Cyst type</th><th>Morphology Notes</th><th><b>Station</b> (s) found [conc. #L-1] <i># specimens</i></th></tr></thead><tbody><tr><th>2A</th><td><i>Fusopsis sp.,</i> spindle smooth surface/LD 115 µm Differs from fig 6j in larger size and absence of a posterior knob</td><td><b>37</b> [0.01] <i>2</i></td></tr><tr><th>2B</th><td><i>Fusopsis sp</i>., spindle smooth surface/LD 75–85/µm short (3–5µm) filaments Differs from figs 6 f,g,l in larger size and spine lengths & numbers</td><td><b>40</b> [.007] <i>1</i></td></tr><tr><th>2C</th><td><i>Fusopsis sp</i>., spindle smooth surface/LD 50µm/5 long, 25 µm filaments Differs from fig 6c in overall shape small size</td><td><b>54</b> [0.016] <i>1</i></td></tr><tr><th>2D</th><td><i>Fusopsis sp</i>., spindle smooth surface/LD 50 µm/ 3 pairs 30 µm filaments Differs from fig 6g,1 in larger size and filaments in pairs</td><td><b>59</b> [0.007] <i>1</i></td></tr><tr><th>2E</th><td><i>Sphaeropsis sp</i>., oblong smooth surface/ LD 35µm/ 3 10 µm filaments Differs from fig 7f in smaller size and smooth surface</td><td><b>10</b> [0.04] <i>1</i></td></tr><tr><th>2F</th><td><i>Sphaeropsis sp.,</i> oblong smooth surface/LD 70 µm Differs from fig 7h in smaller size and ovoid shape</td><td><b>10</b> [0.01] <i>4</i></td></tr><tr><th>2G</th><td><i>Sphaeropsis sp.,</i> spherical smooth surface/LD 80 µm Differs from fig 7h in smaller size</td><td><b>39</b> [0.08] <i>2</i>, <b>60</b> [0.08] <i>1</i></td></tr><tr><th>2H</th><td><i>Sphaeropsis sp.,</i> oblong smooth surface/LD 105 µm Differs in overall size and shape from other Sphaeropsis in fig7</td><td><b>40</b> [0.004] 1</td></tr></tbody></table>
Table 1. Summary data for the 36 in New observations of Papulifères, putative ciliate cysts, from the plankton of the Chukchi Sea (Western Arctic Ocean) in August of 2023
<p><b>Table 1</b>. Summary data for the 36 stations sampled in 2023. Depth given is the vertical extent of the plankton net tow from the depth indicated to the surface. Chlorophyll <i>a</i> concentration (Chl a) is average integrated concentration (µg L-1) throughout the water column from the surface to approximately the depth of the plankton net tow. Cyst types found refer to the new forms shown in here in Figure 2 (2A-2H), and in the Figures 6 (6A, 6E, 6D) and 7 (7A, 7G, 7H, 7I, 7J, 7K, 7N) in Dolan et al. (2023). For convenience, the supplementary file contains images of all now known Chukchi Sea Papulifère forms in two plates, one showing the 16 spindle-shaped <i>Fusopsis</i> forms, another showing the 18 the spherical and oblong <i>Sphaeropsi</i> s forms.</p><table><thead><tr><th><b>St #</b></th><th><b>Date Aug 2023</b></th><th><b>lat (N°)</b></th><th><b>long (W°)</b></th><th>Tow Depth (m)</th><th><b>Station Depth</b></th><th><b>Chl a</b></th><th><b>SST (C°)</b></th><th><b>cyst types found</b></th></tr></thead><tbody><tr><th>1</th><td>3</td><td>65,17</td><td>–168,69</td><td>45</td><td>55</td><td>1,45</td><td>9,9</td><td>Ø</td></tr><tr><th>2</th><td>3</td><td>66,63</td><td>–168,69</td><td>35</td><td>45</td><td>7,47</td><td>7,8</td><td>Ø</td></tr><tr><th>3</th><td>3</td><td>67,67</td><td>–168,96</td><td>45</td><td>55</td><td>9,92</td><td>6</td><td>Ø</td></tr><tr><th>8</th><td>4</td><td>68,24</td><td>–167,12</td><td>38</td><td>48</td><td>0,74</td><td>12,6</td><td>Ø</td></tr><tr><th>9</th><td>4</td><td>69,17</td><td>–168,67</td><td>43</td><td>53</td><td>0,58</td><td>9,9</td><td>Ø</td></tr><tr><th><b>10</b></th><td><b>5</b></td><td><b>70,50</b></td><td><b>–168,67</b></td><td><b>35</b></td><td><b>45</b></td><td><b>6,48</b></td><td><b>6</b></td><td><b>2E, 2F</b></td></tr><tr><th>11</th><td>5</td><td>71,43</td><td>–168,67</td><td>40</td><td>50</td><td>0,75</td><td>7,9</td><td>Ø</td></tr><tr><th><b>13</b></th><td><b>5</b></td><td><b>72,36</b></td><td><b>–168,66</b></td><td><b>50</b></td><td><b>60</b></td><td><b>6,16</b></td><td><b>1</b></td><td><b>6A</b></td></tr><tr><th>16</th><td>6</td><td>73,89</td><td>–168,19</td><td>100</td><td>183</td><td>1,5</td><td>1</td><td>Ø</td></tr><tr><th>18</th><td>6</td><td>74,80</td><td>–167,90</td><td>100</td><td>195</td><td>0,413</td><td>1</td><td>Ø</td></tr><tr><th><b>21</b></th><td><b>7</b></td><td><b>76,00</b></td><td><b>–170,49</b></td><td><b>100</b></td><td><b>1315</b></td><td><b>1,22</b></td><td><b>–0,5</b></td><td><b>6A, 7H, 7K, 7N</b></td></tr><tr><th><b>23</b></th><td><b>8</b></td><td><b>77,00</b></td><td><b>–170,00</b></td><td><b>100</b></td><td><b>2214</b></td><td><b>0,53</b></td><td><b>–1,1</b></td><td><b>6A</b></td></tr><tr><th>24</th><td>8</td><td>77,00</td><td>–174,99</td><td>100</td><td>2012</td><td>0,34</td><td>–1,3</td><td>Ø</td></tr><tr><th>25</th><td>9</td><td>77,00</td><td>179,95</td><td>100</td><td>1081</td><td>0,09</td><td>–1,2</td><td>OE</td></tr><tr><th><b>27</b></th><td><b>12</b></td><td><b>78,54</b></td><td><b>–177,58</b></td><td><b>100</b></td><td><b>1009</b></td><td><b>0,07</b></td><td><b>–1,2</b></td><td><b>7K</b></td></tr><tr><th><b>28</b></th><td><b>13</b></td><td><b>80,00</b></td><td><b>172,40</b></td><td><b>100</b></td><td><b>2702</b></td><td><b>0,14</b></td><td><b>–1</b></td><td><b>6A</b></td></tr><tr><th>29</th><td>14</td><td>79,00</td><td>172,80</td><td>100</td><td>2561</td><td>0,15</td><td>–0,9</td><td>Ø</td></tr><tr><th>30</th><td>14</td><td>78,00</td><td>173,20</td><td>100</td><td>1133</td><td>0,14</td><td>0,3</td><td>Ø</td></tr><tr><th>31</th><td>15</td><td>77,00</td><td>173,60</td><td>100</td><td>740</td><td>0,4</td><td>0,2</td><td>Ø</td></tr><tr><th><b>32</b></th><td><b>15</b></td><td><b>76,00</b></td><td><b>173,61</b></td><td><b>100</b></td><td><b>265</b></td><td><b>0,2</b></td><td><b>–1,1</b></td><td><b>7H</b></td></tr><tr><th><b>33</b></th><td><b>16</b></td><td><b>75,00</b></td><td><b>173,60</b></td><td><b>100</b></td><td><b>147</b></td><td><b>0,07</b></td><td><b>–0,06</b></td><td><b>6E</b></td></tr><tr><th>36</th><td>16</td><td>74,00</td><td>170,16</td><td>40</td><td>52</td><td>0,1</td><td>–0,8</td><td>Ø</td></tr><tr><th><b>37</b></th><td><b>17</b></td><td><b>74,69</b></td><td><b>174,62</b></td><td><b>60</b></td><td><b>72</b></td><td><b>0,2</b></td><td><b>–1</b></td><td><b>2A</b></td></tr><tr><th><b>39</b></th><td><b>18</b></td><td><b>75,73</b></td><td><b>177,18</b></td><td><b>100</b></td><td><b>499</b></td><td><b>0,15</b></td><td><b>–1,3</b></td><td><b>2G</b></td></tr><tr><th><b>40</b></th><td><b>20</b></td><td><b>75,07</b></td><td><b>176,80</b></td><td><b>100</b></td><td><b>196</b></td><td><b>0,31</b></td><td><b>–1,2</b></td><td><b>2B, 2H, 7I, 7N</b></td></tr><tr><th><b>43</b></th><td><b>21</b></td><td><b>75,16</b></td><td><b>–179,97</b></td><td><b>100</b></td><td><b>539</b></td><td><b>0,35</b></td><td><b>–1,4</b></td><td><b>6D, 6E, 7J</b></td></tr><tr><th>45</th><td>21</td><td>75,15</td><td>–176,00</td><td>100</td><td>327</td><td>1,36</td><td>–1</td><td>Ø</td></tr><tr><th><b>47</b></th><td><b>22</b></td><td><b>75,24</b></td><td><b>–171,97</b></td><td><b>100</b></td><td><b>505</b></td><td><b>2,73</b></td><td><b>–0,7</b></td><td><b>6A, 7J</b></td></tr><tr><th><b>50</b></th><td><b>23</b></td><td><b>75,69</b></td><td><b>–166,64</b></td><td><b>100</b></td><td><b>392</b></td><td><b>3,1</b></td><td><b>–0,9</b></td><td><b>6A, 7H, 7N</b></td></tr><tr><th><b>52</b></th><td><b>23</b></td><td><b>76,57</b></td><td><b>–164,36</b></td><td><b>100</b></td><td><b>550</b></td><td><b>0,019</b></td><td><b>–1,1</b></td><td><b>7G</b></td></tr><tr><th><b>54</b></th><td><b>24</b></td><td><b>77,47</b></td><td><b>–164,10</b></td><td><b>100</b></td><td><b>280</b></td><td><b>0,32</b></td><td><b>–1,3</b></td><td><b>2C, 7J</b></td></tr><tr><th><b>56</b></th><td><b>25</b></td><td><b>77,49</b></td><td><b>–158,73</b></td><td><b>100</b></td><td><b>1323</b></td><td><b>0,02</b></td><td><b>–1,3</b></td><td><b>7H, 7J</b></td></tr><tr><th>57</th><td>26</td><td>76,30</td><td>–156,22</td><td>100</td><td>725</td><td>0,23</td><td>–0,1</td><td>Ø</td></tr><tr><th>58</th><td>26</td><td>76,52</td><td>–159,78</td><td>100</td><td>2113</td><td>0,21</td><td>–1</td><td>Ø</td></tr><tr><th>59</th><td>27</td><td>75,50</td><td>–161,15</td><td>100</td><td>2098</td><td>0,2</td><td>–0,5</td><td>2D, 7A</td></tr><tr><th>60</th><td>27</td><td>74,52</td><td>–162,15</td><td>100</td><td>1596</td><td>0,27</td><td>1,8</td><td>2G, 6A, 7A, 7H</td></tr></tbody></table>
Arctic PASSION Online Seminar on Arctic Observing Systems
<p><strong>Arctic PASSION Online Seminar on "Arctic Observing Systems - What, why, who and how to improve"</strong></p> <p><strong>9 November 4 PM GMT</strong></p> <p>Have you ever wondered what Arctic observing systems actually are? What do they observe and why do we need them? What does the data tell us for our daily lives and how might this be important for your own research? And which role does climate monitoring play in the use of Arctic observing systems? This online seminar which is part of our ongoing “Arctic PASSION Online Seminar and Dialogue Series” answers these questions - and many more - and gives you an introduction to Arctic observing systems. </p> <p>In its first part, you will receive an overview of the general structure of Arctic observing systems and the relevant projects and networks currently working with them. A special focus will be laid on their current status and possible future improvements. To this end, you will also get an insight into the Arctic PASSION project whose mission is the implementation of a coherent and integrated Arctic observing system.</p> <p>The second part will introduce you to some of the problems researchers encounter when working with Arctic observing systems: The data they produce are scarce, intermittent and rarely cover all necessary variables. It then goes on to present you some of the possible solutions that projects like Arctic PASSION offer. It not only enhances planning and coordination across institutions and national programs but also facilitates applications if you need to work on a research vessel or need to use a drifting sea ice sensor platform for your own research. Hereby, examples of progress made in the first phase of the Arctic PASSION project will be given, along with plans for the coming years. </p> <p>Last but not least, the third part will focus on the importance and the role of Indigenous and Local Knowledge. Since Arctic observing systems impact policy- and decision-making, they also have a direct impact on Arctic Indigenous Peoples. They therefore have an invested interest in ensuring the observing systems are sufficient and effective. Through Indigenous Knowledge Systems and living in the Arctic, Indigenous Peoples are first to be aware of changes and have a holistic understanding of how changes will have ecosystem-wide impacts. This part will thereby demonstrate why equity is fundamental to the process of <a href="https://journalhosting.ucalgary.ca/index.php/arctic/article/view/74330/55607">SAON ROADS</a> in supporting Indigenous self-determination with decision-making power, as well as to supporting Indigenous Knowledges to be ethically part of the Arctic observing systems.</p> <p> </p> <p><strong>Speakers: </strong></p> <p>Michael Karcher (Arctic PASSION coordinator at Alfred Wegener Institute)</p> <p>Arild Sundfjord (Oceanographer at Norwegian Polar Institute/Arctic PASSION)</p> <p>Margaret Rudolf (Graduate Research Assistant at the International Arctic Research Center/SAON ROADS)</p> <p>Moderation: Lisa Grosfeld (Project Manager at the Alfred Wegener Institute/Arctic PASSION), Sabrina Heerema (Project Manager at GRID-Arendal/Arctic PASSION)</p> <p> </p> <p><strong>Webinar recording: </strong><a href="https://youtu.be/XRPERkwP7CY">https://youtu.be/XRPERkwP7CY</a></p> <p> </p> <p><strong>Related links:</strong></p> <p><a href="http://www.arcticpassion.eu/">www.arcticpassion.eu</a><br> <a href="http://www.apecs.is/">www.apecs.is</a><br> <a href="https://sites.google.com/view/fswg">https://sites.google.com/view/fswg</a><br> <a href="https://sites.google.com/alaska.edu/rna-observations/">https://sites.google.com/alaska.edu/rna-observations/</a><br> Mentioned in the chat: Online atlas of community-based monitoring: <a href="http://www.arcticcbm.org/index.html">http://www.arcticcbm.org/index.html</a></p> <p> </p> <p>This seminar was part of the Arctic PASSION Online Seminar and Dialogue Series. This series is a tool to communicate project topics, share ideas, plans and results, and initiate an inclusive and proactive dialogue with people from different groups, backgrounds and career levels. It is targeted to Arctic and Indigenous Youth, Early Career Scientists and other interested audiences.</p> <p>© Flyer design by Lisa Grosfeld (APECS/AWI) and photo by Mats Granskog (UiT)</p>
Data for Widespread detection of chlorine oxyacids in the Arctic atmosphere: Villum Research Station and Ny-Ålesund observations
<p>The data includes:</p> <p>1) Data for the time series of HClO3 and HClO4 together with relevant data from the Villum Research Station observations.</p> <p>2) Data for the time series of HClO3 from Ny-Ålesund observation.</p> <p>3) Data of the estimated cross-section and photolysis rate of HClO3 and HClO4.</p> <p>Data are also available from the corresponding authors upon request. </p>
Fig. 6. The 12 in On Papulifères, putative ciliate cysts of diverse morphologies, with new observations from the plankton of the Chukchi Sea (Arctic Ocean)
Fig. 6. The 12 fusiform (spindle-shaped, and oblong) Fusuposis papuliferid cyst forms found in Chukchi Sea plankton net tow material. The specimens shown in A, B, D, E, I, K, and L are all from the 2022 station 16. Scale bars all represent 50 µm.
Fig. 9 in On Papulifères, putative ciliate cysts of diverse morphologies, with new observations from the plankton of the Chukchi Sea (Arctic Ocean)
Fig. 9. Geographical distribution of the records of the occurrences of Fusopsis in the 155,000 samples collected with the Continuous Plankton Recorder (CPR) across the North Atlantic from 1958 to 1998, adapted from CPR (2004). Note the occurrence records from north of approximately 45°N and into the Arctic waters, in contrast to the absence of records from localities south of about 45°N. The CPR is a plankton sampling device towed by ships of opportunity which provides samples of the plankton of near surface waters captured on a filter gauze of approximately 270 µm mesh. For details see Beaugrand (2004) and CPR (2004). For the history of the device see Dolan (2022).
Fig. 2 in On Papulifères, putative ciliate cysts of diverse morphologies, with new observations from the plankton of the Chukchi Sea (Arctic Ocean)
Fig. 2. The early illustrations of forms, of distinct morphologies, which would later come to be known as Fusopsis, from reports pre-dating Meunier's studies naming them as such. Canu (1893) depicted two forms, A 1, and A 2 (figs. 8 and 9, respectively, in Canu 1893), which he found in plankton net samples from coastal waters of Boulogne-sur-Mer (NW France). Vanhöffen reported finding the form B (Plate 6, fig. 5 in Vanhöffen 1897) in a plankton net samples from a fjord in western Greenland. Wright (1907) illustrated a form (Plate 5, fig. 4 in Wright 1907) that he found in a plankton net sam- ple from the coastal waters on New Brunswick (E. Canada).
Fig. 5 in On Papulifères, putative ciliate cysts of diverse morphologies, with new observations from the plankton of the Chukchi Sea (Arctic Ocean)
Fig. 5. Locations of the sampling sites in the Chukchi Sea where Papulifère forms were found in plankton net tow material gathered during survey cruises in 2015, 2021, and 2022. The sites are numbered I to VII in chronological order of sampling. Details of the sites and sampling are given in Table 2.
Fig. 8 in On Papulifères, putative ciliate cysts of diverse morphologies, with new observations from the plankton of the Chukchi Sea (Arctic Ocean)
Fig. 8. Frequency distributions of the largest dimensions of the two forms found in the greatest abundance. The left panel shows the distribution of 53 specimens of the form shown in Fig. 6E, resembling Meunier's Fusopsis umbracula (Fig. 1B), parsed into size-classes of longest dimension. The right panel shows the distribution of 20 specimens of the form shown in Fig. 7B, resembling Meunier's Sphaeropsis brevisetosa (Fig. 1S), parsed into size-classes of longest dimension. The distributions of the size-classes appears more 'normal' than bi-modal' suggesting that single populations were sampled with wide size-ranges.
Fig. 4 in On Papulifères, putative ciliate cysts of diverse morphologies, with new observations from the plankton of the Chukchi Sea (Arctic Ocean)
Fig. 4. Illustrations of Papulifère forms said to be tintinnid cysts by Reid and John. From Reid and John 1978: A, B, J, K, & L. From Reid and John 1981: C, D, E, F, G, H, & I. Some were given specific designations: B: "cyst type P"; C: "cyst type S"; D: "cyst type T"; E: "cyst type M"; F: "cyst type F"; G: "cyst type Q"; H: "cyst type K; I: "cyst type N"; L: "cyst type O". Some of these specific designa- tions are still in use in the micropaleontology literature (e.g. Mudie et al. 2021a,b)
Fig. 7. The 14 in On Papulifères, putative ciliate cysts of diverse morphologies, with new observations from the plankton of the Chukchi Sea (Arctic Ocean)
Fig. 7. The 14 spherical/ovoid 'Sphaeropsis' papuliferid cyst forms found in Chukchi Sea plankton net tow material. All the specimens shown are from the 2022 sample station 16 (sample VII in Table 2), except the one shown in Fig. F. Scale bars all represent 50 µm.
ScienceDex guides
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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.