Bolins databasportal "Miocene temperatur portal" visas upp i Eos artikel
Helen Coxall (Institutionen för geologiska vetenskaper) och Margret Steinthorsdottir (Naturhistoriska riksmuseet) tillsammans med kolleger från Storbritannien och USA har publicerat en artikel i tidskriften Eos som beskriver deras senaste samarbetsinsatser för att bygga en interaktiv plattform för katalogisering av palaeohavstemperatur proxydata.
Den här satsningen är resultatet av en serie av projekt som Bolincentrets Research area 6 (Deep time climate variability) och Research area 1 (Ocean-atmosphere dynamics and climate) har gjort med fokus på "Miocene as a past warm climate analogue".
Middle Miocene (~20–14 million years ago) sea surface temperatures (horizontal scale) and model topography (meters above sea level, vertical scale) are shown here. Sea surface temperatures are derived from the multimodel mean of all simulations forced with middle Miocene boundary conditions, as given by Burls et al. [2021, Table 2]. Topography is from the updated Herold boundary conditions as given by Burls et al. [2021]. Credit: Natalie Burls
Eighteen-million-year-old planktonic foraminifera fossils from the Atlantic Ocean, seen here under a light microscope, are one type of geological material used for producing Miocene sea surface temperature estimates. Using these types of calcium carbonate shells, scientists can measure three different geochemical temperature proxies: clumped isotopes (Δ47), traditional oxygen stable isotopes (δ18O), and magnesium/calcium ratios (Mg/Ca). Records using all of these approaches appear in the Miocene temperature portal. Other temperature proxy types (TEX86 and UK’37) are measured on fossilized organic molecules. Credit: Helen Coxall
