Publication Date:
2024-06-26
Description:
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.
Keywords:
104-644; 162-980; 177-1089; 177-1094; 20; 36C; 57-07; 71-19; 90-594; Age, comment; Agulhas Basin; Agulhas Ridge; Antarctica; ANT-IX/4; ANT-X/5; ANT-XI/2; APSARA2; APSARA4; Area/locality; ARK-II/5; Atlantic Ridge; BC; Box corer; CALYPSO; Calypso Corer; Center for Marine Environmental Sciences; CH69-K09; Charles Darwin; Chatham Rise; Climate Change: Learning from the past climate; Comment; COMPCORE; Composite Core; DF; Dome_Fuji; Dome C; Dome C, Antarctica; DRILL; Drilling/drill rig; EDC; EDML; EDRILL; Eirik Drift; Elevation of event; ENAM33; EPICA-Campaigns; EPICA Dome C; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; Event label; EW9302; EW9302-JPC2; EW9302-JPC8; Faroe Islands margin; GC; Giant piston corer (Calypso); GIK23243-1 PS05/431; GIK23414-9; Glomar Challenger; GPC-C; Gravity corer; Gravity corer (Kiel type); Greenland; Greenland Rise; Håkon Mosby; HM57; HM57-07; HM71; HM71-19/1; Ice_core_diverse; ICEDRILL; Ice drill; Iceland; IMAGES I; IMAGES III - IPHIS; IMAGES V; IMAGES XI - P.I.C.A.S.S.O.; Joides Resolution; JPC; Jumbo Piston Core; K708-001; KAL; KAL15; Kasten corer; Kasten corer 15 cm; Kerguelen Plateau; KL; Kohnen Station; Labrador Sea; Latitude of event; Leg104; Leg162; Leg177; Leg90; Le Suroît; Longitude of event; M17/2; M23414; Marion Dufresne (1972); Marion Dufresne (1995); MARUM; Maurice Ewing; MD02-2488; MD032664; MD03-2664; MD101; MD106; MD114; MD125; MD 125 / SWIFT BIS-CARHOT; MD132; MD38; MD84-551; MD88-769; MD88-770; MD94-101; MD94-102; MD952009; MD95-2009; MD952010; MD95-2010; MD952014; MD95-2014; MD972120; MD97-2120; MD972121; MD97-2121; MD99-2227; Meteor (1986); MUC; MultiCorer; NA87-25; NEAP; NEAP-18K; NEEM; Newfoundland margin; North Atlantic; Northeast Atlantic; Norwegian Sea; PALEOCINAT; Past4Future; PC; Piston corer; Piston corer (BGR type); Polarstern; PS05; PS1243-1; PS18; PS18/238; PS18/260; PS2082-3; PS2102-2; PS22/769; PS22 06AQANTX_5; PS2276-4; PS2489-2; PS28; PS28/256; Reference of data; Sampling/drilling ice; SL; SO136; SO136_111GC-12; Sonne; South Atlantic Ocean; Southern Ocean; South Indian Ocean; South Pacific; South Pacific/CONT RISE; SU90-03; SU90-08; SU90-39; SU90-44; TASQWA; Temperature, air; Temperature, difference; Temperature, water; Temperature, water, interpolated; Temperature anomaly; Temperature anomaly, standard error; Type; Uncertainty; V30; V30-97; Vema; Voring Plateau; Vostok
Type:
Dataset
Format:
text/tab-separated-values, 974 data points
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