Disentangling multiproxy temperature reconstructions from the subtropical North Atlantic

Reliable reconstruction of past sea surface temperature (SST) is prime importance for understanding the Earth’s sensitivity to external forcing. Yet, it remains a major challenge in paleoceanography because comparison between SST estimates from different proxies reveals mismatches and raise question as what contrasting actually record. A better these light seasonal occurrence proxy bearing organisms (archives) water mass changes help assess climate models. Here, we analyze data last deglaciation using sediment core site situated at northern boundary North Atlantic subtropical gyre influenced by fast latitudinal migrations Azores Front (AF) resulting masses that may affect records. Differences deglacial reconstructions obtained (1) Mg/Ca planktic foraminifer tests, (2) alkenone U K ′ 37 , (3) assemblages (SIMMAX), are assumed result ecology organisms, assessed impact on local seawater δ 18 O (δ w ) reconstructions. The general trends SSTs all four confirm well-known succession warm cold events. Mismatches amplitudes explained differences phenology proxy-bearing hydrography. combination three archives cause offsets exceed driven signals.