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Capron, Emilie; Govin, Aline; Stone, Emma J; Masson-Delmotte, Valerie; Mulitza, Stefan; Otto-Bliesner, Bette L; Rasmussen, Tine Lander; Sime, Louise C; Waelbroeck, Claire; Wolff, Eric W (2015): Last Interglacial synthesis of high-latitude temperature: temperature anomalies and associated errors for 4 time slices. PANGAEA, https://doi.org/10.1594/PANGAEA.841672, Supplement to: Capron, E et al. (2014): Temporal and spatial structure of multi-millennial temperature changes at high latitudes during the Last Interglacial. Quaternary Science Reviews, 103, 116-133, https://doi.org/10.1016/j.quascirev.2014.08.018

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Abstract:
The Last Interglacial (LIG, 129-116 thousand of years BP, ka) represents a test bed for climate model feedbacks in warmer-than-present high latitude regions. However, mainly because aligning different palaeoclimatic archives and from different parts of the world is not trivial, a spatio-temporal picture of LIG temperature changes is difficult to obtain. Here, we have selected 47 polar ice core and sub-polar marine sediment records and developed a strategy to align them onto the recent AICC2012 ice core chronology. We provide the first compilation of high-latitude temperature changes across the LIG associated with a coherent temporal framework built between ice core and marine sediment records. Our new data synthesis highlights non-synchronous maximum temperature changes between the two hemispheres with the Southern Ocean and Antarctica records showing an early warming compared to North Atlantic records. We also observe warmer than present-day conditions that occur for a longer time period in southern high latitudes than in northern high latitudes. Finally, the amplitude of temperature changes at high northern latitudes is larger compared to high southern latitude temperature changes recorded at the onset and the demise of the LIG. We have also compiled four data-based time slices with temperature anomalies (compared to present-day conditions) at 115 ka, 120 ka, 125 ka and 130 ka and quantitatively estimated temperature uncertainties that include relative dating errors. This provides an improved benchmark for performing more robust model-data comparison. The surface temperature simulated by two General Circulation Models (CCSM3 and HadCM3) for 130 ka and 125 ka is compared to the corresponding time slice data synthesis. This comparison shows that the models predict warmer than present conditions earlier than documented in the North Atlantic, while neither model is able to produce the reconstructed early Southern Ocean and Antarctic warming. Our results highlight the importance of producing a sequence of time slices rather than one single time slice averaging the LIG climate conditions.
Related to:
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Coverage:
Median Latitude: 6.892700 * Median Longitude: 20.668478 * South-bound Latitude: -78.464420 * West-bound Longitude: -51.060000 * North-bound Latitude: 77.450000 * East-bound Longitude: 177.990000
Date/Time Start: 1971-01-01T00:00:00 * Date/Time End: 2009-08-20T00:00:00
Minimum Elevation: -4620.5 m * Maximum Elevation: 3810.0 m
Event(s):
104-644 * Latitude: 66.678300 * Longitude: 4.576700 * Date/Time Start: 1985-08-08T00:00:00 * Date/Time End: 1985-08-10T00:00:00 * Elevation: -1226.0 m * Penetration: 380.5 m * Recovery: 342.1 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 49 cores; 380.5 m cored; 0 m drilled; 89.9% recovery
162-980 * Latitude: 55.484933 * Longitude: -14.702267 * Date/Time Start: 1995-07-10T00:00:00 * Date/Time End: 1995-07-11T00:00:00 * Elevation: -2180.0 m * Penetration: 353.7 m * Recovery: 366.7 m * Location: North Atlantic Ocean * Campaign: Leg162 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 39 cores; 353.7 m cored; 0 m drilled; 103.7% recovery
177-1089 * Latitude: -40.936333 * Longitude: 9.893983 * Date/Time: 1997-12-19T00:00:00 * Elevation: -4620.5 m * Penetration: 793.6 m * Recovery: 675.9 m * Location: South Atlantic Ocean * Campaign: Leg177 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 86 cores; 791.6 m cored; 2 m drilled; 85.4% recovery
Comment:
This dataset concerns the new synthesis of high-latitude temperature anomalies during the Last Interglacial published by Capron et al. 2014. It contains:
- the information of marine sediment and ice core sites included in the study: name, latitude, longitude, elevation, information of temperature reconstruction, modern temperature value (from WOA98 and core top, if available)
- temperature anomalies and 2 sigma errors for 4 time slices (130 ka, 125 ka, 120 ka, 115 ka) using WOA98 values as modern reference
- temperature anomalies and 2 sigma errors for 4 time slices (130 ka, 125 ka, 120 ka, 115 ka) using core top SST values as modern reference
Age pointers defined in marine sediment cores are given in Table A2 available online as a supplement of the paper.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5Area/localityAreaCapron, Emilie
6CommentCommentCapron, Emilieproxy for reconstructed temperature
7UncertaintyUncertainty±Capron, Emilieoriginal uncertainty of reconstructed temperature (in °C)
8TypeTypeCapron, Emilietype of temperature
9Reference of dataRef dataCapron, Emilie
10Temperature, airTTT°CCapron, Emiliemodern Annual surface air temperature at ice core drilling sites
11Temperature, waterTemp°CCapron, Emiliecore top temperature
12Age, commentCommCapron, Emilieinformation on core top age
13Temperature, water, interpolatedTemp interp°CCapron, EmilieWOA98 temperature (°C)
14Temperature, differencedelta T°CCapron, EmilieWOA98 - core top temperature difference (°C)
15Temperature anomalyT anomaly°CCapron, Emilie130 ka (°C, versus WOA98)
16Temperature anomaly, standard errorT anomaly std e±Capron, Emilie130 ka 2sigma (°C, versus WOA98)
17Temperature anomalyT anomaly°CCapron, Emilie125 ka (°C, versus WOA98)
18Temperature anomaly, standard errorT anomaly std e±Capron, Emilie125 ka 2sigma (°C, versus WOA98)
19Temperature anomalyT anomaly°CCapron, Emilie120 ka (°C, versus WOA98)
20Temperature anomaly, standard errorT anomaly std e±Capron, Emilie120 ka 2sigma (°C, versus WOA98)
21Temperature anomalyT anomaly°CCapron, Emilie115 ka (°C, versus WOA98)
22Temperature anomaly, standard errorT anomaly std e±Capron, Emilie115 ka 2sigma (°C, versus WOA98)
23Temperature anomalyT anomaly°CCapron, Emilie130 ka (°C, versus core top value)
24Temperature anomaly, standard errorT anomaly std e±Capron, Emilie130 ka 2sigma (°C, versus core top value)
25Temperature anomalyT anomaly°CCapron, Emilie125 ka (°C, versus core top value)
26Temperature anomaly, standard errorT anomaly std e±Capron, Emilie125 ka 2sigma (°C, versus core top value)
27Temperature anomalyT anomaly°CCapron, Emilie120 ka (°C, versus core top value)
28Temperature anomaly, standard errorT anomaly std e±Capron, Emilie120 ka 2sigma (°C, versus core top value)
29Temperature anomalyT anomaly°CCapron, Emilie115 ka (°C, versus core top value)
30Temperature anomaly, standard errorT anomaly std e±Capron, Emilie115 ka 2sigma (°C, versus core top value)
Size:
974 data points

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