Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya)

Opel, Thomas; Fritzsche, Diedrich; Meyer, Hanno

doi:10.5194/cp-9-2379-2013

Cited by 47 publications

(55 citation statements)

References 37 publications

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“…To place the results in an Arctic-wide context, we compare our northern Greenland temperature record (NG stack) to ice core records from the Russian Arctic (Akademii Nauk -AN; Opel et al, 2013), Canada (Agassiz Ice Cap -Agassiz; Vinther et al, 2008), Svalbard (Lomonosovfonna -Lomo;Divine et al, 2011) and southern Greenland (Dye3;Vinther et al, 2006b), as well as a multi-proxy reconstruction of annual Arctic SAT (Arctic2k; Pages 2k Consortium, 2013; Fig. 6) that covers our time period.…”

Section: The Northern Greenland δ 18 O Stack and Its Paleoclimatic Simentioning

confidence: 99%

Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium

et al. 2016

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Abstract. We present for the first time all 12 δ 18 O records obtained from ice cores drilled in the framework of the North Greenland Traverse (NGT) between 1993 and 1995 in northern Greenland. The cores cover an area of 680 km × 317 km, 10 % of the Greenland ice sheet. Depending on core length (100-175 m) and accumulation rate (90-200 kg m −2 a −1 ) the single records reflect an isotope-temperature history over the last 500-1100 years. Lowest δ 18 O mean values occur north of the summit and east of the main divide as a consequence of Greenland's topography. In general, ice cores drilled on the main ice divide show different results than those drilled east of the main ice divide that might be influenced by secondary regional moisture sources.A stack of all NGT records and the NGRIP record is presented with improved signal-to-noise ratio. Compared to single records, this stack represents the mean δ 18 O signal for northern Greenland that is interpreted as proxy for temperature. Our northern Greenland δ 18 O stack indicates distinctly enriched δ 18 O values during medieval times, about AD 1420 ± 20 and from AD 1870 onwards. The period between AD 1420 and AD 1850 has depleted δ 18 O values compared to the average for the entire millennium and represents the Little Ice Age. The δ 18 O values of the 20th century are comparable to the medieval period but are lower than that about AD 1420.

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Section: The Northern Greenland δ 18 O Stack and Its Paleoclimatic Simentioning

confidence: 99%

Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium

et al. 2016

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“…None of these model studies investigate sea ice per-turbation comparable to present-day observations. Measurements from ice cores spanning this period suggest that sea ice changes can influence the isotopic composition of precipitation (Divine et al, 2011;Opel et al, 2013;Ku et al, 2012;Fauria et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

How does sea ice influence <i>δ</i><sup>18</sup>O of Arctic precipitation?

et al. 2017

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Abstract. This study investigates how variations in Arctic sea ice and sea surface conditions influence δ 18 O of presentday Arctic precipitation. This is done using the model iso-CAM3, an isotope-equipped version of the National Center for Atmospheric Research Community Atmosphere Model version 3. Four sensitivity experiments and one control simulation are performed with prescribed sea surface temperature (SST) and sea ice. Each of the four experiments simulates the atmospheric and isotopic response to Arctic oceanic conditions for selected years after the beginning of the satellite era in 1979.Changes in sea ice extent and SSTs have different impacts in Greenland and the rest of the Arctic. The simulated changes in central Arctic sea ice do not influence δ 18 O of Greenland precipitation, only anomalies of Baffin Bay sea ice. However, this does not exclude the fact that simulations based on other sea ice and sea surface temperature distributions might yield changes in the δ 18 O of precipitation in Greenland. For the Arctic, δ 18 O of precipitation and water vapour is sensitive to local changes in sea ice and sea surface temperature and the changes in water vapour are surface based. Reduced sea ice extent yields more enriched isotope values, whereas increased sea ice extent yields more depleted isotope values. The distribution of the sea ice and sea surface conditions is found to be essential for the spatial distribution of the simulated changes in δ 18 O.

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“…ka BP (Fig. ka BP, coinciding with the LIA cold interval (Sepp€ a et al 2009;Opel et al 2013). Moreover, the Lake Ladoga record shows an accelerated d 18 O diatom decrease starting at c. 4.0 cal.…”

Section: Temporal Changes In D 18 O Diatom Diatom Taxonomy and Lakementioning

confidence: 73%

Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes

Kostrova

Meyer

Bailey

et al. 2019

Boreas

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This article presents a new comprehensive assessment of the Holocene hydrological variability of Lake Ladoga, northwest Russia. The reconstruction is based on oxygen isotopes of lacustrine diatom silica (d 18 O diatom ) preserved in sediment core Co 1309, and is complemented by a diatom assemblage analysis and a survey of modern isotope hydrology. The data indicate that Lake Ladoga has existed as a freshwater reservoir since at least 10.8 cal. ka BP. The d 18 O diatom values range from +29.8 to +35.0&, and relatively higher d 18 O diatom values around +34.7& between c. 7.1 and 5.7 cal. ka BP are considered to reflect the Holocene Thermal Maximum. A continuous depletion in d 18 O diatom since c. 6.1 cal. ka BP accelerates after c. 4 cal. ka BP, indicating Middle to Late Holocene cooling that culminates during the interval 0.8-0.2 cal. ka BP, corresponding to the Little Ice Age. Lake-level rises result in lower d 18 O diatom values, whereas lower lake levels cause higher d 18 O diatom values. The diatom isotope record gives an indication for a rather early opening of the Neva River outflow at c. 4.4-4.0 cal. ka BP. Generally, overall high d 18 O diatom values around +33.5& characterize a persistent evaporative lake system throughout the Holocene. As the Lake Ladoga d 18 O diatom record is roughly in line with the 60°N summer insolation, a linkage to broader-scale climate change is likely.

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Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya)

Cited by 47 publications

References 37 publications

Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium

Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium

How does sea ice influence <i>δ</i><sup>18</sup>O of Arctic precipitation?

Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes

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Eurasian Arctic climate over the past millennium as recorded in the Akademii Nauk ice core (Severnaya Zemlya)

Cited by 47 publications

References 37 publications

Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium

Spatial and temporal oxygen isotope variability in northern Greenland – implications for a new climate record over the past millennium

How does sea ice influence &lt;i&gt;δ&lt;/i&gt;&lt;sup&gt;18&lt;/sup&gt;O of Arctic precipitation?

Holocene hydrological variability of Lake Ladoga, northwest Russia, as inferred from diatom oxygen isotopes

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How does sea ice influence <i>δ</i><sup>18</sup>O of Arctic precipitation?