Charton, Liz; Combourieu-Nebout, Nathalie; Bertini, Adele; Peyron, Odile; Robles, Mary; Lebreton, Vincent; Moncel, Marie-Hélène: Pollen abundance and climate reconstruction from MIS 6 of ODP Site 161-976 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993648 (dataset in review)
Abstract:
Sediment samples from the Ocean Drilling Program Site 976 (36°12.3'N, 4°18.8'W) were processed for palynological analyses to reconstruct past vegetation dynamics in the southwestern Mediterranean region during the Penultimate Glacial (MIS 6). Pollen percentages are provided for a time interval between 190 and 127 ka. The age model is based on correlation with the temperate pollen profile from core MD01-2444 from the Portuguese margin (Margari et al., 2010), and with Dongge cave speleothem (Charton et al., 2026; Jiménez-Amat and Zahn, 2015; Kelly et al., 2006). Pollen data were used to generate climatic reconstructions of six annual and seasonal parameters, using four different methods: Modern Analogue Technique (MAT; Guiot 1990), Weighted Averaging Partial Least Squares (WA-PLS; ter Braak and Juggins 1993), Boosted Regression Trees (BRT; Salonen et al. 2012) and Random Forest (RF; Breiman et al. 2001). The results allow to assess the climatic variability during the Penultimate Glacial until the onset of the Last Interglacial.
Keyword(s):
Related to:
Charton, Liz; Combourieu-Nebout, Nathalie; Bertini, Adele; Peyron, Odile; Robles, Mary; Lebreton, Vincent; Moncel, Marie-Hélène (2026): How unstable was the environment during the Penultimate Glacial in the South-Western Mediterranean? Vegetation, climate and human dynamics during MIS 6. Climate of the Past, 22(4), 747-781, https://doi.org/10.5194/cp-22-747-2026
References:
Breiman, Leo (2001): Random Forests. Machine Learning, 45(1), 5-32, https://doi.org/10.1023/A:1010933404324
Pflaumann, Uwe; Duprat, Josette M; Pujol, Claude; Labeyrie, Laurent D (1996): SIMMAX: A modern analog technique to deduce Atlantic sea surface temperatures from planktonic foraminifera in deep-sea sediments. Paleoceanography, 11(1), 15-36, https://doi.org/10.1029/95PA01743
Salonen, J Sakari; Seppä, Heikki; Luoto, Miska; Bjune, Anne Elisabeth; Birks, H John B (2012): A North European pollen–climate calibration set: analysing the climatic responses of a biological proxy using novel regression tree methods. Quaternary Science Reviews, 45, 95-110, https://doi.org/10.1016/j.quascirev.2012.05.003
ter Braak, Cajo J F; Juggins, Steve (1993): Weighted averaging partial least squares regression (WA-PLS): an improved method for reconstructing environmental variables from species assemblages. Hydrobiologia, 269-270(1), 485-502, https://doi.org/10.1007/BF00028046
Coverage:
Median Latitude: 36.205300 * Median Longitude: -4.312495 * South-bound Latitude: 36.205300 * West-bound Longitude: -4.312780 * North-bound Latitude: 36.205300 * East-bound Longitude: -4.312210
Date/Time Start: 1995-05-21T09:00:00 * Date/Time End: 1995-06-03T11:45:00
Minimum Elevation: -1108.0 m * Maximum Elevation: -1108.0 m
Event(s):
161-976B * Latitude: 36.205300 * Longitude: -4.312780 * Date/Time Start: 1995-05-21T09:00:00 * Date/Time End: 1995-06-01T12:45:00 * Elevation: -1108.0 m * Penetration: 928.7 m * Recovery: 535.54 m * Location: Alboran Sea * Campaign: Leg161 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 106 cores; 928.7 m cored; 0 m drilled; 57.7 % recovery
161-976C * Latitude: 36.205300 * Longitude: -4.312210 * Date/Time Start: 1995-06-01T12:45:00 * Date/Time End: 1995-06-03T11:45:00 * Elevation: -1108.0 m * Penetration: 379.7 m * Recovery: 340.16 m * Location: Alboran Sea * Campaign: Leg161 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 40 cores; 379.7 m cored; 0 m drilled; 89.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Charton, Liz | |||
| 2 | Latitude of event | Latitude | Charton, Liz | |||
| 3 | Longitude of event | Longitude | Charton, Liz | |||
| 4 | Date/Time of event | Date/Time | Charton, Liz | |||
| 5 | Sample code/label | Sample label | Charton, Liz | DSDP/ODP/IODP sample designation | ||
| 6 | AGE | Age | ka BP | Charton, Liz | Geocode | |
| 7 | Half | Half | Charton, Liz | Sampling section half | ||
| 8 | Depth, composite | Depth comp | mcd | Charton, Liz | IODP Depth Scale Terminology | |
| 9 | Pinus | Pinus | % | Charton, Liz | Percentage abundance, palynology | |
| 10 | Quercus, deciduous | Quercus deci | % | Charton, Liz | Percentage abundance, palynology | |
| 11 | Alnus | Alnus | % | Charton, Liz | Percentage abundance, palynology | |
| 12 | Betula | Betula | % | Charton, Liz | Percentage abundance, palynology | |
| 13 | Fraxinus | Frx | % | Charton, Liz | Percentage abundance, palynology | |
| 14 | Fagus | Fagus | % | Charton, Liz | Percentage abundance, palynology | |
| 15 | Trees, temperate, other | Trees temp oth | % | Charton, Liz | Percentage abundance, palynology | |
| 16 | Cedrus | Cedrus | % | Charton, Liz | Percentage abundance, palynology | |
| 17 | Abies | Abies | % | Charton, Liz | Percentage abundance, palynology | |
| 18 | Trees, montane, other | Trees mon oth | % | Charton, Liz | Percentage abundance, palynology | |
| 19 | Ericaceae | Ericac | % | Charton, Liz | Percentage abundance, palynology | |
| 20 | Cupressoideae | Cupressoideae | % | Charton, Liz | Percentage abundance, palynology | |
| 21 | Argania | Argania | % | Charton, Liz | Percentage abundance, palynology | |
| 22 | Trees, other | Trees oth | % | Charton, Liz | Percentage abundance, palynology | |
| 23 | Quercus ilex | Q. ilex | % | Charton, Liz | Percentage abundance, palynology | |
| 24 | Olea | Olea | % | Charton, Liz | Percentage abundance, palynology | |
| 25 | Phillyrea | Phillyrea | % | Charton, Liz | Percentage abundance, palynology | |
| 26 | Pistacia | Pistacia | % | Charton, Liz | Percentage abundance, palynology | |
| 27 | Cistaceae | Cistaceae | % | Charton, Liz | Percentage abundance, palynology | |
| 28 | Cistus ladanifer | C. ladanifer | % | Charton, Liz | Percentage abundance, palynology | |
| 29 | Pollen, mediterranean taxa, other | Pollen medit taxa oth | % | Charton, Liz | Percentage abundance, palynology | |
| 30 | Artemisia | Artemisia | % | Charton, Liz | Percentage abundance, palynology | |
| 31 | Chenopodiaceae | Chenopod | % | Charton, Liz | Percentage abundance, palynology | |
| 32 | Ephedra | Ephedra | % | Charton, Liz | Percentage abundance, palynology | |
| 33 | Pollen, semi-desert, other | Pollen semi-desert oth | % | Charton, Liz | Percentage abundance, palynology | |
| 34 | Asteroideae | Asteroideae | % | Charton, Liz | Percentage abundance, palynology | |
| 35 | Cichorioideae | Cichorioideae | % | Charton, Liz | Percentage abundance, palynology | |
| 36 | Poaceae | Poac | % | Charton, Liz | Percentage abundance, palynology | |
| 37 | Brassicaceae | Brassicac | % | Charton, Liz | Percentage abundance, palynology | |
| 38 | Apiaceae | Apiaceae | % | Charton, Liz | Percentage abundance, palynology | |
| 39 | Herbs, other | Herbs oth | % | Charton, Liz | Percentage abundance, palynology | |
| 40 | Cyperaceae | Cyperac | % | Charton, Liz | Percentage abundance, palynology | |
| 41 | Aquatics, other | Aquatics oth | % | Charton, Liz | Percentage abundance, palynology | |
| 42 | Isoetes | Isoetes | % | Charton, Liz | Percentage abundance, palynology | |
| 43 | Pteridophytes, other | Pteridophytes other | % | Charton, Liz | Percentage abundance, palynology | |
| 44 | Pollen, temperate forest | Pollen te forest | % | Charton, Liz | Percentage abundance, palynology | |
| 45 | Montane forest | Montane f | % | Charton, Liz | Percentage abundance, palynology | |
| 46 | Pollen, pioneer | Pollen pioneer | % | Charton, Liz | Percentage abundance, palynology | |
| 47 | Pollen, mediterranean | Pollen mediterr | % | Charton, Liz | Percentage abundance, palynology | |
| 48 | Herbs | Herbs | % | Charton, Liz | Percentage abundance, palynology | |
| 49 | Pollen, semi-desert | Pollen semi-desert | % | Charton, Liz | Percentage abundance, palynology | |
| 50 | Aquatics | Aquatics | % | Charton, Liz | Percentage abundance, palynology | |
| 51 | Pteridophytes | Pteridophytes | % | Charton, Liz | Percentage abundance, palynology | |
| 52 | Temperature, coldest month, mean | CMT mean | °C | Charton, Liz | Boosted Regression Trees (BRT), according to Salonen et al. (2012) | Reconstructed mean temperature of the coldest month. |
| 53 | Temperature, warmest month, mean | WMT mean | °C | Charton, Liz | Boosted Regression Trees (BRT), according to Salonen et al. (2012) | Reconstructed mean temperature of the warmest month. |
| 54 | Temperature, annual mean | MAT | °C | Charton, Liz | Boosted Regression Trees (BRT), according to Salonen et al. (2012) | Reconstructed mean annual temperature. |
| 55 | Precipitation, annual total, mean | Precip annual tot mean | mm/a | Charton, Liz | Boosted Regression Trees (BRT), according to Salonen et al. (2012) | Reconstructed mean annual precipitation. |
| 56 | Precipitation, summer, June-August | Precip summer (6-8) | mm | Charton, Liz | Boosted Regression Trees (BRT), according to Salonen et al. (2012) | Reconstructed mean summer precipitation. |
| 57 | Precipitation, winter, December-February | Precip winter (12-2) | mm | Charton, Liz | Boosted Regression Trees (BRT), according to Salonen et al. (2012) | Reconstructed mean winter precipitation. |
| 58 | Temperature, coldest month, mean | CMT mean | °C | Charton, Liz | Reconstructed, modern analogue technique, according to Pflaumann et al. (1996) | Reconstructed mean temperature of the coldest month. |
| 59 | Temperature, warmest month, mean | WMT mean | °C | Charton, Liz | Reconstructed, modern analogue technique, according to Pflaumann et al. (1996) | Reconstructed mean temperature of the warmest month. |
| 60 | Temperature, annual mean | MAT | °C | Charton, Liz | Reconstructed, modern analogue technique, according to Pflaumann et al. (1996) | Reconstructed mean annual temperature. |
| 61 | Precipitation, annual total, mean | Precip annual tot mean | mm/a | Charton, Liz | Reconstructed, modern analogue technique, according to Pflaumann et al. (1996) | Reconstructed mean annual precipitation. |
| 62 | Precipitation, summer, June-August | Precip summer (6-8) | mm | Charton, Liz | Reconstructed, modern analogue technique, according to Pflaumann et al. (1996) | Reconstructed mean summer precipitation. |
| 63 | Precipitation, winter, December-February | Precip winter (12-2) | mm | Charton, Liz | Reconstructed, modern analogue technique, according to Pflaumann et al. (1996) | Reconstructed mean winter precipitation. |
| 64 | Temperature, coldest month, mean | CMT mean | °C | Charton, Liz | Random Forests (RF) method, according to Breiman et al. (2001) | Reconstructed mean temperature of the coldest month. |
| 65 | Temperature, warmest month, mean | WMT mean | °C | Charton, Liz | Random Forests (RF) method, according to Breiman et al. (2001) | Reconstructed mean temperature of the warmest month. |
| 66 | Temperature, annual mean | MAT | °C | Charton, Liz | Random Forests (RF) method, according to Breiman et al. (2001) | Reconstructed mean annual temperature. |
| 67 | Precipitation, annual total, mean | Precip annual tot mean | mm/a | Charton, Liz | Random Forests (RF) method, according to Breiman et al. (2001) | Reconstructed mean annual precipitation. |
| 68 | Precipitation, summer, June-August | Precip summer (6-8) | mm | Charton, Liz | Random Forests (RF) method, according to Breiman et al. (2001) | Reconstructed mean summer precipitation. |
| 69 | Precipitation, winter, December-February | Precip winter (12-2) | mm | Charton, Liz | Random Forests (RF) method, according to Breiman et al. (2001) | Reconstructed mean winter precipitation. |
| 70 | Temperature, coldest month, mean | CMT mean | °C | Charton, Liz | Weighted averaging partial least squares regression (WA-PLS) method, according to ter Braak and Juggins (1993) | Reconstructed mean temperature of the coldest month. |
| 71 | Temperature, warmest month, mean | WMT mean | °C | Charton, Liz | Weighted averaging partial least squares regression (WA-PLS) method, according to ter Braak and Juggins (1993) | Reconstructed mean temperature of the warmest month. |
| 72 | Temperature, annual mean | MAT | °C | Charton, Liz | Weighted averaging partial least squares regression (WA-PLS) method, according to ter Braak and Juggins (1993) | Reconstructed mean annual temperature. |
| 73 | Precipitation, annual total, mean | Precip annual tot mean | mm/a | Charton, Liz | Weighted averaging partial least squares regression (WA-PLS) method, according to ter Braak and Juggins (1993) | Reconstructed mean annual precipitation. |
| 74 | Precipitation, summer, June-August | Precip summer (6-8) | mm | Charton, Liz | Weighted averaging partial least squares regression (WA-PLS) method, according to ter Braak and Juggins (1993) | Reconstructed mean summer precipitation. |
| 75 | Precipitation, winter, December-February | Precip winter (12-2) | mm | Charton, Liz | Weighted averaging partial least squares regression (WA-PLS) method, according to ter Braak and Juggins (1993) | Reconstructed mean winter precipitation. |
License:
Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
13976 data points
Download Data (login required; moratorium until 2026-10-15)
View dataset as HTML (shows only first 2000 rows)