Lacustrine particle dynamics in high-altitude Estany Redó (Spain) - a high resolution sediment trap study

Kulbe, Thomas; Ohlendorf, Christian; Sturm, Michael

doi:10.4081/jlimnol.2006.89

Cited by 5 publications

(5 citation statements)

References 26 publications

(40 reference statements)

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“…In contrast to the low summer sedimentation rates, fluxes of total particulates, organic matter, biogenic silica, and brGDGTs all peak during spring and fall mixing (Fig. 6b-c), similar to sedimentation patterns seen in other dimictic lake systems (e.g., Poister and DeGuelle, 2005;Kulbe et al, 2006). Increases in particle fluxes during mixing are associated with increased diatom production, as the increased particle size and density of the diatom tests facilitates export from the water column to the sediments (Poister and DeGuelle, 2005).…”

Section: Seasonality Of Brgdgt Production and Sedimentationmentioning

confidence: 57%

Seasonal variability of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in a temperate lake system

Loomis

Russell

Heureux

et al. 2014

Geochimica et Cosmochimica Acta

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Section: Seasonality Of Brgdgt Production and Sedimentationmentioning

confidence: 57%

Seasonal variability of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in a temperate lake system

Loomis

Russell

Heureux

et al. 2014

Geochimica et Cosmochimica Acta

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“…The four years of detailed particle flux observation in the sediment traps are well reflected in the mass accumulation rates (MAR) of the varves in the sediment core (Figure 3b). The sediment yield in the traps that is three times higher than the MAR is attributed to the fact that sinking particles are generally oversampled by sediment traps (Bloesch and Burns, 1980;Kulbe et al, 2006) and partial removal of surface sediments by weak bottom currents as suggested by small daily temperature fluctuations in the near-sediment bottom waters (P. Bluszcz, C. Ohlendorf, B. Zolitschka and M. Sturm, unpublished data, 2006). According to our detailed survey with short cores, sedimentation rate is 45% higher at the site of the traps in the centre of the lake than at the location near the outlet where the freeze core was taken (Figure 1).…”

Section: Hydrological and Atmospheric Influence On Sediment Supply á Observations From Sediment Trap Data 2001 á 2005mentioning

confidence: 99%

How stable are twentieth-century calibration models? A high-resolution summer temperature reconstruction for the eastern Swiss Alps back to AD 1580 derived from proglacial varved sediments

et al. 2007

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We found a significant positive correlation between local summer air temperature (May-September) and the annual sediment mass accumulation rate (MAR) in Lake Silvaplana (46°N, 9°E, 1800 m a.s.l.) during the twentieth century (r = 0.69, p < 0.001 for decadal smoothed series). Sediment trap data (2001-2005) confirm this relation with exceptionally high particle yields during the hottest summer of the last 140 years in 2003. On this base we developed a decadal-scale summer temperature reconstruction back to AD 1580. Surprisingly, the comparison of our reconstruction with two other independent regional summer temperature reconstructions (based on tree-rings and documentary data) revealed a significant negative correlation for the pre-1900 data (ie, late ‘Little Ice Age’). This demonstrates that the correlation between MAR and summer temperature is not stable in time and the actualistic principle does not apply in this case. We suggest that different climatic regimes (modern/‘Little Ice Age’) lead to changing state conditions in the catchment and thus to considerably different sediment transport mechanisms. Therefore, we calibrated our MAR data with gridded early instrumental temperature series from AD 1760-1880 (r = -0.48, p < 0.01 for decadal smoothed series) to properly reconstruct the late LIA climatic conditions. We found exceptionally low temperatures between AD 1580 and 1610 (0.75°C below twentieth-century mean) and during the late Maunder Minimum from AD 1680 to 1710 (0.5°C below twentieth-century mean). In general, summer temperatures did not experience major negative departures from the twentieth-century mean during the late ‘Little Ice Age’. This compares well with the two existing independent regional reconstructions suggesting that the LIA in the Alps was mainly a phenomenon of the cold season.

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“…The number of particles analysed in the present study is twice those usually analysed in other studies (e.g. Kulbe et al, 2006). To characterize the lithogenic particles, we calculated the average composition of 10 particles each month for both the water traps and the aerial traps.…”

Section: Methodsmentioning

confidence: 87%

Relative importance of dust inputs and aquatic biological production as sources of lake sediments in an oligotrophic lake in a semi‐arid area

Oseguera

Alcocer

Vilaclara

2010

Earth Surf Processes Landf

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) in the DF case, and (b) the circulation period of the lake and the availability of nutrients in the MSR case. As expected, the DF in Alchichica was high and similar to that found in other arid and semi-arid areas. However, the MSR was higher than that reported for other oligotrophic lakes. Particles captured in the aerial traps consisted mainly of detrital minerals; in contrast, particles found in the water traps were mostly biogenic and, to a lesser extent, detrital minerals. The MSR was one to seven times higher than the DF. In spite of the oligotrophic status of Lake Alchichica, the large size of the settled phytoplankton (autochthonous, waterborne) is what leads to the high MSR, which surpasses the DF (allochthonous, airborne) derived from whirlwinds originating in easily eroded terrains that are characteristic of arid/semi-arid areas. Our results indicate that caution must be taken in considering that the DF amount measured through DF collectors located at the lake shore does actually represent the DF entering into the lake.

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Lacustrine particle dynamics in high-altitude Estany Redó (Spain) - a high resolution sediment trap study

Abstract: Particle fluxes were measured from 2000 to 2001 with 3 integrating open traps (O-traps) and a sequencing trap (S-trap) in the oligotrophic,

Cited by 5 publications

References 26 publications

Seasonal variability of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in a temperate lake system

Seasonal variability of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in a temperate lake system

How stable are twentieth-century calibration models? A high-resolution summer temperature reconstruction for the eastern Swiss Alps back to AD 1580 derived from proglacial varved sediments

Relative importance of dust inputs and aquatic biological production as sources of lake sediments in an oligotrophic lake in a semi‐arid area

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