Alkenone paleotemperature determinations
WebThe alkenone paleotemperature (‘Uk37 ’) method, which relies on determining the unsaturation index of biomarker compounds produced by one group of closely related … WebApr 14, 2024 · A comprehensive database of paleoclimate records is needed to place recent warming into the longer-term context of natural climate variability. We present a global compilation of...
Alkenone paleotemperature determinations
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WebNov 1, 2000 · First, the sedimentary component or fraction containing alkenones should be identified in order to assess the impact of horizontal advection and vertical mixing on … WebFeb 5, 2001 · The application of alkenones to paleotemperature estimation leads the paleo-pCO 2 approach considerably; I therefore devote a short concluding section to the latter …
WebJun 7, 2001 · At the northern end of the core transect, the alkenone estimate of cooling at the Last Glacial Maximum (LGM), 4°C, is similar to those obtained from a nearby core from radiolarian and foraminiferal transfer function estimates ( 19, 20 ), planktonic δ 18 O ( 20 ), and alkenone unsaturation ( 21 ). WebThe alkenone paleotemperature method has gained wide acceptance, but questions remain concerning the water depth and seasonality of alkenone production or the …
WebJun 18, 2010 · that alkenone paleotemperature determinations yield a close approximation to mean annual sea surface temperature at the sites. An average of … WebFeb 1, 2009 · The alkenone organic paleotemperature proxy has been used with great success to generate sea-surface temperature (SST) records from diverse areas of the …
WebDec 18, 2024 · 1 Introduction General Introduction. The eastern boundary upwelling systems (EBUSs) cover less than 1% of the world's ocean surface but contribute more than 20% to global fish catches (Chavez & Messié, 2009).The Humboldt Current System (HCS) is the most productive EBUS in terms of fishery, but the upwelling dynamic response to climate …
WebJun 18, 2010 · Alkenone-based tropical SST records from the major ocean basins show coherent glacial-interglacial temperature changes of 1° to 3°C that align with (but slightly … hallmark movie bottled with love youtubeWebThe alkenone‐based U 37K′ proxy is a cornerstone of paleoclimatology, providing insight into the temperature history of the Earth's surface ocean. Although the relationship between U 37K′ and sea… Expand 126 PDF Alkenone Paleothermometry in Coastal Settings: … bupa field houseWebJan 20, 2024 · For each of the core sites we estimated average seasonal cycles of sea surface temperature (SST) and salinity, which we then weighted with the seasonal productivity cycle derived from chlorophyll satellite imagery. The unsaturation index ( U37K′) ranges from 0.2 to 1 and correlates with water temperature but not with salinity. bupa financial statements 2021WebFeb 1, 2016 · For U 37 K ′ determination, three sediment samples from the North Atlantic (43.35° N, 60.208° W, modern in age), the subtropical eastern Atlantic (30.88° N, 10.63° W, dated to the Last Glacial Maximum), and the tropical Gulf of Aden (11.955° N, 44.3° E, dated to Last Glacial Maximum) respectively were extracted via Accelerated Solvent Extraction … bupa find a physioWebThe alkenone paleotemperature (‘Uk37 ’) method, which relies on determining the unsaturation index of biomarker compounds produced by one group of closely related haptophyte algae, is now widely used to reconstruct near-surface ocean temperatures on timescales ranging from a few centuries to millions of years. hallmark movie brimming with loveWeb固相萃取－气相色谱联用测定海洋沉积物中的长链烯酮. 2012-01-06 白亚之 邹建军 刘季花 高晶晶 施美娟 崔菁菁 bupa find a provider toolWebMar 14, 2012 · Paleoceanography Volume 27, Issue 1 Regular Article Free Access Alkenone unsaturation in surface sediments from the eastern equatorial Pacific: Implications for SST reconstructions M. Kienast, M. Kienast [email protected] Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada bupa find a dentist