Assessment for paleoclimatic utility of biomass burning tracers in SE-Dome ice core, Greenland

Parvin, Fahmida; Seki, Osamu; Fujita, Koji; Iizuka, Yoshinori; Matoba, Sumito; Ando, Takuto; Sawada, Ken

doi:10.1016/j.atmosenv.2018.10.012

Cited by 10 publications

(13 citation statements)

References 60 publications

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“…800 kyr BP; e.g. Petit et al, 1990;Lambert et al, 2008), geologic timescales (from the Eemian to the Holocene; e.g. Maggi, 1997;Ram and Koenig, 1997;Steffensen, 1997;Ruth et al, 2003;Schüpbach et al, 2018;Simonsen et al, 2019), and seasonal scales (e.g.…”

Section: Introductionmentioning

confidence: 99%

Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years

et al. 2021

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Abstract. Our study is the first to demonstrate a high-temporal-resolution record of mineral composition in a Greenland ice core over the past 100 years. To reconstruct past variations in the sources and transportation processes of mineral dust in northwestern Greenland, we analysed the morphology and mineralogical composition of dust in the SIGMA-D ice core from 1915 to 2013 using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results revealed that the ice core dust consisted mainly of silicate minerals and that the composition varied substantially on multi-decadal and inter-decadal scales, suggesting that the ice core minerals originated from different geological sources in different periods during the past 100 years. The multi-decadal variation trend differed among mineral types. Kaolinite, which generally formed in warm and humid climatic zones, was abundant in colder periods (1950–2004), whereas mica, chlorite, feldspars, mafic minerals, and quartz, which formed in arid, high-latitude, and local areas, were abundant in warmer periods (1915–1949 and 2005–2013). Comparison to Greenland surface temperature records indicates that multi-decadal variation in the relative abundance of these minerals was likely affected by local temperature changes in Greenland. Trajectory analysis shows that the minerals were transported mainly from the western coast of Greenland in the two warming periods, which was likely due to an increase in dust sourced from local ice-free areas as a result of shorter snow/ice cover duration in the Greenland coastal region during the melt season caused by recent warming. Meanwhile, ancient deposits in northern Canada, which were formed in past warmer climates, seem to be the best candidate during the colder period (1950–2004). Our results suggest that SEM–EDS analysis can detect variations in ice core dust sources during recent periods of low dust concentration.

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Section: Introductionmentioning

confidence: 99%

Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years

et al. 2021

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“…The pattern is repeated also at the NEEM site provided the dating uncertainty of +/-1 year is taken into account (Gfeller et al, 2014). In addition the peaks around 1994 was also observed at Summit station with an increase in ammonium and formate (Legrand et al, 2016) making the 1994 signal Greenland wide (Parvin et al, 2019), while 1990's peak is not. In the Canadian burned area record 1989 (>7.5Mha), both 1994 and 1995 (>6Mha) and 1998 (4.5Mha) are significant, making Canadian fires the likely source areas for the events observed in the traverse records in the 90's.…”

Section: Local Dust Activationmentioning

confidence: 78%

“…Extreme peaks in NH4 + in ice cores have been used as a proxy for North American forest fires (Legrand et al, 1992;Zennaro et al, 2014;Fuhrer et al, 1996) while the background NH4 + is related to biogenic emissions from soil and vegetation and thus temperature on a longer timescale. Other commonly used fire proxies in ice cores include formate, which is found well correlated with excess ammonium (Legrand et al, 1995;Savarino and Legrand, 1998), levoglucosan, which is specific to biomass burning events, black carbon, which is also subject to other anthropogenic sources (Zennaro et al, 2014;Segato et al, 2021), dehydroabietic acid (Parvin et al, 2019) and vanillic acid (Grieman et al, 2018a;Kawamura et al, 2012;Grieman et al, 2018b). The amount of fires as determined in ice cores have been found to vary over time with an increase in the mid-1600s (Zennaro et al, 2014) and it is speculated that current climate change and anthropogenic activity could enhance fires.…”

Section: Local Dust Activationmentioning

confidence: 99%

“…Here we assess excess ammonium (exceeding 97.5%) as a proxy for forest fires in the 5 traverse cores (Figure 5, note T2015-A5 was not analysed for NH4 + ) and compare with fire records from other recent ice cores (Parvin et al, 2019;Zennaro et al, 2014;Gfeller et al, 2014;Legrand et al, 2016;Pokhrel et al, 2020). We use ammonium excess as a proxy for forest fires, however, bear in mind that ammonium is found to only replicate 8 out of 14 levoglucosan peaks at the NEEM site (Zennaro et al, 2014).…”

Section: Local Dust Activationmentioning

confidence: 99%

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NEEM to EastGRIP Traverse – spatial variability, seasonality, extreme events and trends in common ice core proxies over the past decades

Kjær

Zens

Black

et al. 2021

Preprint

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Abstract. Greenland ice cores provide information about past climate. However, the number of firn and ice cores from Greenland are limited and thus the spatial variability of the chemical impurities used as proxies is largely unconstrained. Furthermore, few impurity records covering the past two decades exist from Greenland. We have by means of Continuous Flow analysis investigated 6 shallow firn cores obtained in Northern Greenland as part of the NEEM to EastGRIP traverse in 2015. The oldest reach back to 1966. The annual mean and quartiles of the insoluble dust, ammonium, and calcium concentrations in the 6 firn cores spanning a distance of 426 km overlap, and also the seasonal cycles have similar peaks in timing and magnitude across sites. Peroxide (H2O2) is accumulation dependent and varies from site to site and conductivity, likely influenced by sea salts, also vary spatially. The temporal variability of the records is further assessed. We find no evidence for increases in total dust concentration, but find an increase in the large dust particle fluxes that we contribute to an activation of Greenland local sources in the recent years (1998–2015). We observe the expected acid and conductivity increase in the mid 70’s as a result of anthropogenic contamination and the following decrease due to mitigation. After detrending using the five year average the conductivity and acid records several volcanic horizons were identified and associated with Icelandic eruptions and volcanic eruptions in the Barents sea region. By creating a composite based on excess ammonium compared to the five year running average, we obtain a robust forest fire proxy associated primarily with Canadian forest fires (R = 0.51). We also note that the peak ammonium in the individual firn cores appear more scattered between cores than the peak volcanic layers, suggesting that the forest fire signal is more dispersed in the atmosphere than the acid from volcanic eruptions.

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“…The pyrolysis of peat yield retene transformed from diterpenoids by heating of fires [ 64 ]. The retene in ice cores [ 65 , 66 ], air [ 67 ], and lake sediments [ 68 ] were often attributed to the combustion of plants. Retene in the Tinbarap peat core showed similar variation patterns to that of charcoal abundance (Figs 5 and 6 ).…”

Section: Discussionmentioning

confidence: 99%

The significance of pyrogenic polycyclic aromatic hydrocarbons in Borneo peat core for the reconstruction of fire history

et al. 2021

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The reconstruction of fire history is essential to understand the palaeoclimate and human history. Polycyclic aromatic hydrocarbons (PAHs) have been extensively used as a fire marker. In this work, the distribution of PAHs in Borneo peat archives was investigated to understand how PAHs reflect the palaeo-fire activity. In total, 52 peat samples were analysed from a Borneo peat core for the PAH analysis. Pyrogenic PAHs consist of 2–7 aromatic rings, some of which have methyl and ethyl groups. The results reveal that the concentration of pyrogenic PAHs fluctuated with the core depth. Compared to low-molecular-weight (LMW) PAHs, the high-molecular-weight (HMW) PAHs had a more similar depth variation to the charcoal abundance. This finding also suggests that the HMW PAHs were mainly formed at a local fire near the study area, while the LMW PAHs could be transported from remote locations.

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Assessment for paleoclimatic utility of biomass burning tracers in SE-Dome ice core, Greenland

Cited by 10 publications

References 60 publications

Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years

Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years

NEEM to EastGRIP Traverse – spatial variability, seasonality, extreme events and trends in common ice core proxies over the past decades

The significance of pyrogenic polycyclic aromatic hydrocarbons in Borneo peat core for the reconstruction of fire history

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