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16 results for “paleoclimate proxy”
TABLE 5 in Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies
<p>TABLE 5 — Fossil locations from Southern South America and age in million of years.Studied geological formations and sites used for comparison in the discussion.</p><table><thead><tr><th><b>Fossil Site</b></th><th><b>Geological Formation</b></th><th><b>Age (Ma)</b></th><th><b>Source</b></th></tr></thead><tbody><tr><th>Pico Quemado</th><td>Ñirihuau</td><td>middle Miocene?</td><td>Caviglia 2018</td></tr><tr><th>Cancha Carreras, Estancia Tres Marías</th><td>Río Guillermo</td><td>≤21.7 ± 0.3 to ≤23.5 ± 0.3</td><td>Fosdick <i>et al.</i> 2011; 2015a, b</td></tr><tr><th>Aluminé Basin</th><td>Rancahué</td><td>25.0 ± 1.4 to 26.0 ± 1.5</td><td>Brea <i>et al.</i> 2015; Franzese <i>et al.</i> 2011</td></tr><tr><th>Sierra Baguales</th><td>Río Leona</td><td>33.0 ± 2.8</td><td>Gutiérrez <i>et al.</i> 2017, 2019</td></tr><tr><th>Upper Río Turbio</th><td>Río Turbio</td><td>≤26.6 ± 0.2 to ≤33.4 to</td><td>Fosdick <i>et al.</i> 2015a</td></tr><tr><th>Lower Río Turbio</th><td>Río Turbio</td><td>≤46.3 ± 1.3 to ≤47.1 ± 2.7</td><td>Fosdick <i>et al.</i> 2015a</td></tr><tr><th>Río Pichileufú</th><td>Ventana</td><td>47.46 ± 0.05</td><td>Wilf <i>et al.</i> 2005</td></tr><tr><th>Laguna del Hunco</th><td>La Huitrera</td><td>51.91 ± 0.22</td><td>Wilf <i>et al.</i> 2005</td></tr><tr><th>Ligorio Márquez</th><td>Ligorio Márquez</td><td><57</td><td>Suárez <i>et al.</i> 2000; Hinojosa 2005</td></tr><tr><th>Palacio de los Loros</th><td>Salamanca</td><td>61.7</td><td>Iglesias <i>et al.</i> 2007</td></tr></tbody></table>
TABLE 2 in Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies
<p>TABLE 2 — Estimated values of temperature and precipitation for the upper Río Turbio Formation member. *Scarce fossil material.</p><table><thead><tr><th><b>Upper RTF</b></th><th></th><th><b>Equation</b></th><th><b>Dataset</b></th><th><b>R</b> <b>2</b></th><th><b>Error</b></th><th><b>Source</b></th></tr></thead><tbody><tr><th>Temperature (°C)</th><td>15.3</td><td colspan="2">MAT = 3.25 + 0.24*% non-tooth CLAMP 3B SA</td><td>0.9</td><td>2.1°C</td><td>Hinojosa 2005; Hinojosa & Villagrán 2005</td></tr><tr><th>Temperature (°C)</th><td>14.3</td><td>MAT = 26.03pE + 1.31</td><td>SA</td><td>0.82</td><td>2.8°C</td><td>Hinojosa <i>et al.</i> 2011</td></tr><tr><th>Temperature (°C)</th><td>14.8</td><td>MAT = 0.204*E + 4.6</td><td>LMA</td><td>0.58</td><td>4.8°C</td><td>Peppe <i>et al.</i> 2011</td></tr><tr><th>Precipitation (mm)</th><td>*</td><td>Ln(MAP) = 1.63 + 0.49*MLnA</td><td>CLAMP 3B SA</td><td>0.6</td><td>Ln(0.5) cm</td><td>Hinojosa 2005; Hinojosa & Villagrán 2005</td></tr><tr><th>Precipitation (mm)</th><td>*</td><td>lnMAP = 0.283(MlnA) + 2.92</td><td>LAA</td><td>0.23</td><td>0.61</td><td>Peppe <i>et al.</i> 2011</td></tr></tbody></table>
TABLE 3 in Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies
<p>TABLE 3 — Estimated values of temperature and precipitation for the Río Guillermo Formation.</p><table><thead><tr><th><b>RGF</b></th><th></th><th><b>Equation</b></th><th><b>Dataset</b></th><th><b>R</b> <b>2</b></th><th><b>Error</b></th><th><b>Source</b></th></tr></thead><tbody><tr><th>Temperature (°C)</th><td>5.3</td><td>MAT = 3.25 + 0.24*% non-tooth</td><td>CLAMP 3B SA</td><td>0.9</td><td>2.1°C</td><td>Hinojosa 2005; Hinojosa & Villagrán 2005</td></tr><tr><th>Temperature (°C)</th><td>3.5</td><td>MAT = 26.03pE + 1.31</td><td>SA</td><td>0.82</td><td>2.8°C</td><td>Hinojosa <i>et al.</i> 2011</td></tr><tr><th>Temperature (°C)</th><td>6.3</td><td>MAT = 0.204E + 4.6</td><td>LMA</td><td>0.58</td><td>4.8°C</td><td>Peppe <i>et al.</i> 2011</td></tr><tr><th>Precipitation (mm)</th><td>682</td><td>Ln(MAP) = 1.63 + 0.49*MLnA</td><td>CLAMP 3B SA</td><td>0.6</td><td>Ln(0.5) cm</td><td>Hinojosa 2005; Hinojosa & Villagrán 2005</td></tr><tr><th>Precipitation (mm)</th><td>829</td><td>lnMAP = 0.283(MlnA) + 2.92</td><td>LAA</td><td>0.23</td><td>0.61</td><td>Peppe <i>et al.</i> 2011</td></tr></tbody></table>
TABLE 1 in Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies
<p>TABLE 1 — Estimated values of temperature and precipitation for the lower Río Turbio Formation member.</p><table><thead><tr><th><b>Lower RTF</b></th><th></th><th><b>Equation</b></th><th><b>Dataset</b></th><th><b>R</b> <b>2</b></th><th><b>Error</b></th><th><b>Source</b></th></tr></thead><tbody><tr><th>Temperature (°C)</th><td>16.5</td><td>MAT = 3.25 + 0.24*% non-tooth</td><td>CLAMP 3B SA</td><td>0.9</td><td>2.1°C</td><td>Hinojosa 2005; Hinojosa & Villagrán 2005</td></tr><tr><th>Temperature (°C)</th><td>15.7</td><td>MAT = 26.03pE + 1.31</td><td>SA</td><td>0.82</td><td>2.8°C</td><td>Hinojosa <i>et al.</i> 2011</td></tr><tr><th>Temperature (°C)</th><td>15.6</td><td>MAT = 0.204E + 4.6</td><td>LMA</td><td>0.58</td><td>4.8°C</td><td>Peppe <i>et al.</i> 2011</td></tr><tr><th>Temperature (°C)</th><td>16.9</td><td>See manuscript (1)</td><td>DiLP</td><td>0.7</td><td>4°C</td><td>Peppe <i>et al.</i> 2011</td></tr><tr><th>Precipitation (mm)</th><td>1764</td><td>Ln(MAP) = 1.63 + 0.49*MLnA</td><td>CLAMP 3B SA</td><td>0.6</td><td>Ln(0.5) cm</td><td>Hinojosa 2005; Hinojosa & Villagrán 2005</td></tr><tr><th>Precipitation (mm)</th><td>1435</td><td>lnMAP = 0.283(MlnA) + 2.92</td><td>LAA</td><td>0.23</td><td>0.61 cm</td><td>Peppe <i>et al.</i> 2011</td></tr><tr><th>Precipitation (mm)</th><td>1303</td><td>See manuscript (2)</td><td>DiLP</td><td>0.27</td><td>0.6 cm</td><td>Peppe <i>et al.</i> 2011</td></tr></tbody></table>
FIG. 7. — Dendrograms resulting from Q in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 7. — Dendrograms resulting from Q-mode cluster analysis and the assemblages identified in each section.
FIG. 5 in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 5. — Relative frequency curves of the planktonic foraminifera identified in Bo Section. Refer to Figure 2 for the explanation of the lithostratigraphical column.
FIG. 3 in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 3. — Relative frequency curves of the planktonic foraminifera identified in Ag. Giannis Section. Refer to Figure 2 for the explanation of the lithostratigraphical column.
FIG. 2 in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 2. — Lithostratigraphical columns of the Ag. Giannis, Potamos and Bo sections, Gavdos Island, Greece.
FIG. 4 in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 4. — Relative frequency curves of the planktonic foraminifera identified in Potamos Section. Refer to Figure 2 for the explanation of the lithostratigraphical column.
APPENDIX 1 in Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies
<p>APPENDIX 1.— Supplementary material including the fossil specimens from the studied sites and the morphological character scores for CLAMP analysis</p><table><thead><tr><th><b>Lower Río Turbio Fm</b></th><th><b>LMA</b></th><th><b>LAA</b></th><th><b>Source</b></th></tr></thead><tbody><tr><th><i>Acrodiclidium flavianum</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Allophylus graciliformis</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Anacardites pichileufensis</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Annona</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Casearia</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Cissus pichileufensis</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Cinnamomum neogaea</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Cupania grosse-serrata</i></th><td>*</td><td>-</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Cupania latifolioides</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Cupania patagonica</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Cupania santacrucensis</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Drimys patagonica</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Drimys</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Eucalyptus</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Escallonia</i> sp.</th><td>*</td><td><b>–</b></td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Myrcia</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Myricaceae</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Myrica hunzikerii</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Nectandra prolifica</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Nothofagus subferruginea</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Nothofagus variabilis</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Nothofagus serrulata</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Nothofagus elongata</i></th><td>*</td><td><b>–</b></td><td>Hünicken 1967</td></tr><tr><th><i>Ocotea menendezi</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Ocotea</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Persea</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Psidium liociardensis</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Qualea patagonica</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Schinopsis patagonica</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Styrax</i> sp.</th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Styrax glandulifera</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Tetracera</i> cf. <i>patagonica</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Zyziphus chubutensis</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Malvaceae</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Urticaceae</i></th><td>*</td><td><b>–</b></td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th>cf. <i>Pouterlabatia clark</i></th><td>*</td><td>*</td><td>Hünicken 1967; Vento & Prámparo 2018</td></tr><tr><th><i>Paullinia</i> sp.</th><td>*</td><td><b>–</b></td><td>Panti 2018</td></tr><tr><th><i>Banisteriophyllum</i></th><td>*</td><td><b>–</b></td><td>Panti 2018</td></tr></tbody></table>
TABLE 4 in Paleoclimate estimates for the Paleogene-Neogene in southern South America using fossil leaves as proxies
<p>TABLE 4 — Estimated values for the climate variables in the lower Río Turbio Formation member from CLAMP analysis using the CLAMP3B SA and CLAMPSH90 data set.</p><table><thead><tr><th><b>CLAMP Climate parameters</b></th><th><b>Estimates</b></th><th><b>Error</b></th><th><b>Dataset</b></th><th><b>Estimates</b></th><th><b>Error</b></th><th><b>Data set</b></th></tr></thead><tbody><tr><th>Mean annual temperature (°C)</th><td>12.7</td><td>2.1</td><td>CLAMP3BSA</td><td>12.2</td><td>4.83</td><td>CLAMPSH90</td></tr><tr><th>Warm month mean temperature (°C)</th><td>23.2</td><td>3.3</td><td>CLAMP3BSA</td><td>21.5</td><td>7.5</td><td>CLAMPSH90</td></tr><tr><th>Cold month mean temperature (°C)</th><td>3.4</td><td>3.8</td><td>CLAMP3BSA</td><td>4</td><td>4.6</td><td>CLAMPSH90</td></tr><tr><th>Mean Growing Season Precipitation (mm)</th><td>1741</td><td>42.6</td><td>CLAMP3BSA</td><td>1394</td><td>68</td><td>CLAMPSH90</td></tr><tr><th>3-Wettest Months Precipitation (mm)</th><td>784</td><td>19.8</td><td>CLAMP3BSA</td><td>460</td><td>35</td><td>CLAMPSH90</td></tr><tr><th>3-Driest Months Precipitation (mm)</th><td>334</td><td>15.3</td><td>CLAMP3BSA</td><td>160</td><td>22.8</td><td>CLAMPSH90</td></tr><tr><th>Length Growing Season</th><td>7.7</td><td>1.2</td><td>CLAMP3BSA</td><td>7.4</td><td>0.8</td><td>CLAMPSH90</td></tr></tbody></table>
FIG. 9 in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 9. — SST curves based on the percentages of warm- and cool-water indices.
FIG. 8 in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 8. — The score plots of the factors revealed from the R-mode analysis for each section.
FIG. 6 in Micropaleontological parameters as proxies of late Miocene surface water properties and paleoclimate in Gavdos Island, eastern Mediterranean
FIG. 6. — Litho-, bio- and chronostratigraphy of the studied sections in Gavdos Island, Greece.
A global collection of paleoclimate proxy time series over the Common Era
<p><strong>*Dec 2023 Proxy Database Update: This database has been updated based on a more stringent proxy screening procedure. All screening calculations and decisions are documented in the accompanying Julia code Pluto notebook file (see also the HTML file preview of the code). This screening has resulted in the removal of 183 proxy time series from the original file.*</strong></p><p><i><strong>Original Data Descriptor:</strong></i></p><p>This collection of paleoclimate proxy data currently includes 2591 tree ring chronologies, 197 coral and sclerosponge records, 153 ice core isotope records, 26 speleothem isotope records, 10 lake sediment records, and 1 marine sediment record, for a total of 2,978 records. The proxy records have been collected with a focus on the past 2000 years.</p><p>This dataset has been collated through collaborative efforts with the Last Millennium Reanalysis project (Hakim et al. 2016) and provides the basis for the reconstructions presented in Steiger et al. (2018). Though the majority of data records are culled from PAGES2k Consortium (2017) and Breitenmoser et al. (2014), some data was taken from the NOAA NCEI's World Data Center for Paleoclimatology archive. Additionally, data was solicited from multiple investigators such as Eric Steig, Stephanie Hayman, Sylke Draschba, Henning Kuhnert, Andy Baker, and others amounting to approximately 60 coral, ice core, speleothem, and lake sediment datasets, though all files in this archive can be freely shared. Datasets were selected whose resolution was at least 25 years, temporal duration was greater than 40 years, and consisted of proxies that had established proxy system models (forward models). </p><p>The data files are in Matlab format and the variables here include the proxy names ('lmr2k_names'), the proxy data ('lmr2k_data'), the proxy type ('archive'), the proxy measurement ('msrmt'), the proxy latitudes and longitudes ('p_lat' and 'p_lon'), and the years of the proxies ('year'). Seasonally resolved proxies have been averaged from April to the following calendar year March.</p><p>Updates will be made to this proxy collection as more proxy data become available.</p><p> </p><p>Breitenmoser, P., et al. "Forward modelling of tree-ring width and comparison with a global network of tree-ring chronologies." <i>Climate of the Past</i> 10.2 (2014): 437.</p><p>PAGES2k Consortium. "A global multiproxy database for temperature reconstructions of the common era." <i>Scientific Data</i> 4, 170088 (2017).</p><p>Hakim, Gregory J., et al. "The last millennium climate reanalysis project: Framework and first results." <i>Journal of Geophysical Research: Atmospheres</i> 121.12 (2016): 6745-6764.</p><p>Steiger, N. J. et al. "A reconstruction of global hydroclimate and dynamical variables over the Common Era." <i>Scientific Data </i>5:180086 (2018).</p>
Modern calibration of Poa flabellata (Tussac grass) as a new paleoclimate proxy in the South Atlantic
<p>Carbon and oxygen stable isotopes in alpha cellulose from <em>Poa flabellata</em> leaf and root material collected between September 2015 to September 2016 in the Falkland Islands at four different locations.</p> <p> </p> <p> </p>
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