A novel biomarker-based proxy for the spring phytoplankton bloom in Arctic and sub-arctic settings – HBI T25

Belt, Simon T.; Smik, Lukas; Köseoğlu, Denizcan; Knies, Jochen; Husum, Katrine

doi:10.1016/j.epsl.2019.06.038

Cited by 31 publications

(58 citation statements)

References 44 publications

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“…Further, an even more reliable and detailed picture is achieved when combining IP 25 with open-water phytoplankton biomarkers such as brassicasterol, dinosterol and/ or a tri-unsaturated HBI (Z-isomer; hereinafter referred to as "HBI III") and its E-isomer [9,12,87,89,90,112,126,134]. In this way, the problem of distinguishing perennial ice cover from ice-free water can be solved.…”

Section: Biomarker Proxies For Paleo-environmental Reconstructionmentioning

confidence: 99%

“…The use of different phytoplankton biomarkers (in combination with IP 25 ) may even allow distinguishing between different seasonal sea ice conditions including marginal ice zone (MIZ) situations (e.g., [9,12,103]). Based on the distribution pattern of HBI III in surface sediments from the western Barents Sea and the correlation with seasonal sea ice concentration maps, for example, Belt et al [12] proposed that HBI III maxima reflect winter MIZ conditions.…”

Section: Biomarker Proxies For Paleo-environmental Reconstructionmentioning

confidence: 99%

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Holocene variability in sea ice and primary productivity in the northeastern Baffin Bay

Saini

Stein

Fahl

et al. 2020

Arktos

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Arctic sea ice is a critical component of the climate system, known to influence ocean circulation, earth's albedo, and ocean-atmosphere heat and gas exchange. Current developments in the use of IP 25 (a sea ice proxy with 25 carbon atoms only synthesized by Arctic sea ice diatoms) have proven it to be a suitable proxy for paleo-sea ice reconstructions over hundreds of thousands to even millions of years. In the NE Baffin Bay, off NW Greenland, Melville Bugt is a climate-sensitive region characterized by strong seasonal sea ice variability and strong melt-water discharge from the Greenland Ice Sheet (GIS). Here, we present a centennial-scale resolution Holocene sea ice record, based on IP 25 and open-water phytoplankton biomarkers (brassicasterol, dinosterol and HBI III) using core GeoB19927-3 (73° 35.26′ N, 58° 05.66′ W). Seasonal to ice-edge conditions near the core site are documented for most of the Holocene period with some significant variability. In the lower-most part, a cold interval characterized by extensive sea ice cover and very low local productivity is succeeded by an interval (~ 9.4-8.5 ka BP) with reduced sea ice cover, enhanced GIS spring melting, and strong influence of the West Greenland Current (WGC). From ~ 8.5 until ~ 7.8 ka BP, a cooling event is recorded by ice algae and phytoplankton biomarkers. They indicate an extended sea ice cover, possibly related to the opening of Nares Strait, which may have led to an increased influx of Polar Water into NE-Baffin Bay. The interval between ~ 7.8 and ~ 3.0 ka BP is characterized by generally reduced sea ice cover with millennial-scale variability of the (late winter/early spring) ice-edge limit, increased open-water conditions (polynya type), and a dominant WGC carrying warm waters at least as far as the Melville Bugt area. During the last ~ 3.0 ka BP, our biomarker records do not reflect the late Holocene 'Neoglacial cooling' observed elsewhere in the Northern Hemisphere, possibly due to the persistent influence of the WGC and interactions with the adjacent fjords. Peaks in HBI III at about ~ 2.1 and ~ 1.3 ka BP, interpreted as persistent ice-edge situations, might correlate with the Roman Warm Period (RWP) and Medieval Climate Anomaly (MCA), respectively, in-phase with the North Atlantic Oscillation (NAO) mode. When integrated with marine and terrestrial records from other circum-Baffin Bay areas (Disko Bay, the Canadian Arctic, the Labrador Sea), the Melville Bugt biomarker records point to close ties with high Arctic and Northern Hemispheric climate conditions, driven by solar and oceanic circulation forcings.

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Section: Biomarker Proxies For Paleo-environmental Reconstructionmentioning

confidence: 99%

Section: Biomarker Proxies For Paleo-environmental Reconstructionmentioning

confidence: 99%

Holocene variability in sea ice and primary productivity in the northeastern Baffin Bay

Saini

Stein

Fahl

et al. 2020

Arktos

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“…Müller et al, ) or specific HBIs (“HBI‐T 25 ”; cf. Belt et al, ), even information about temporal and spatial changes in sea‐ice coverage can be obtained (for further details, see text).…”

Section: Proxies For Reconstructing Past Arctic Ocean Paleoenvironmenmentioning

confidence: 99%

“…The same consequence applies to totally ice-free conditions where no ice algae live, that is, IP 25 = 0. This difficulty in interpreting IP 25 data can be overcome by the additional use of phytoplankton-derived, open-water biomarkers such as brassicasterol and dinosterol (Müller et al, 2009(Müller et al, , 2011 or specific tri-unsaturated HBIs (Belt et al, 2015(Belt et al, , 2019Limoges et al, 2018;Ribeiro et al, 2017;Smik et al, 2016). By combining the environmental information carried by IP 25 and the different phytoplankton biomarkers (Figure 6c), even more semiquantitative estimates of present and past sea-ice coverage, seasonal variability, and marginal ice zone situations are possible (Müller et al, 2011;Belt et al, 2015Belt et al, , 2019Stein et al, 2017; for recent and critical review of this biomarker approach, see Belt, 2018).…”

Section: Proxies For Reconstructing Past Arctic Ocean Paleoenvironmenmentioning

confidence: 99%

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The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

Stein

2019

Paleoceanog and Paleoclimatol

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Over the past 3-4 decades, coincident with global warming and atmospheric CO 2 increase, Arctic sea ice has significantly decreased in its extent as well as in thickness. When extrapolating this alarming trend, the central Arctic Ocean might become ice-free during summers within about the next 2-5 decades. Paleoclimate records allow us to better understand the processes controlling modern climate change and distinguish between natural and anthropogenic forcing. In this context, detailed studies of the earlier Earth history characterized by a much warmer global climate with elevated atmospheric CO 2 concentrations are important. The main focus of this review paper is the long-term late Mesozoic-Cenozoic Arctic Ocean climate history from Greenhouse to Icehouse conditions, with special emphasis on Arctic sea ice history. Starting with some information on the Cretaceous Arctic Ocean climate, this paper will concentrate on selected results from Integrated Ocean Drilling Program (IODP) Expedition 302 (Arctic Ocean Coring Expedition (ACEX)), the first scientific drilling in the permanently ice-covered Arctic Ocean, dealing with the Cenozoic climate history. While these results from ACEX were unprecedented, key questions related to the Cenozoic Arctic climate history remain unanswered, largely due to the major mid-Cenozoic hiatus (if existing) and partly to the poor recovery of the ACEX record. Following-up ACEX and its cutting-edge science, a second scientific drilling on Lomonosov Ridge with a focus on the reconstruction of the continuous and complete Cenozoic Arctic Ocean climate history has currently been proposed and scheduled as IODP Expedition 377 for 2021.

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Sedimentary ancient DNA and HBI biomarkers as sea‐ice indicators: A complementary approach in Antarctic fjord environments

Pieńkowski,

Szczuciński,

Breszka

et al. 2024

Limnol Oceanogr Letters

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Reliable high‐resolution, pre‐observational‐period sea‐ice datasets are rare but critical for contextualizing recent sea‐ice declines and future scenarios. We combine sedimentary ancient DNA of the sea‐ice dinoflagellate Polarella glacialis (Pgla‐sedaDNA) with selected highly branched isoprenoid (HBI) biomarkers alongside other indicators to reconstruct sub‐decadal sea‐ice changes in a marine archive from the Antarctic Peninsula that extends to ~ 1900 CE. Pre‐1940 CE, the continuously present sea‐ice biomarker IPSO25 yet absent Pgla‐sedaDNA, along with low open‐water biomarkers and total organic carbon (TOC), imply more prominent seasonal sea ice and lower productivity under cooler climate. Post‐1940 CE, rising Pgla‐sedaDNA and open‐water HBIs under climate warming reflect young ice with a retreating sea‐ice edge. Over the last two decades, lower Pgla‐sedaDNA, higher open‐water HBIs and TOC infer known warming, sea‐ice reduction, and increased productivity. Our multiproxy‐based palaeo‐histories agree well with observational data, highlighting the potential of this combination of proxies for nuanced and long‐term sea‐ice reconstructions.

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A novel biomarker-based proxy for the spring phytoplankton bloom in Arctic and sub-arctic settings – HBI T25

Cited by 31 publications

References 44 publications

Holocene variability in sea ice and primary productivity in the northeastern Baffin Bay

Holocene variability in sea ice and primary productivity in the northeastern Baffin Bay

The Late Mesozoic‐Cenozoic Arctic Ocean Climate and Sea Ice History: A Challenge for Past and Future Scientific Ocean Drilling

Sedimentary ancient DNA and HBI biomarkers as sea‐ice indicators: A complementary approach in Antarctic fjord environments

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