Basin Pond, Maine 900 Year brGDGT Data and Temperature Reconstruction Miller, D.R.; Habicht, M.H.; Keisling, B.A.; Castañeda, I.S.; Bradley, R.S. Miller, D.R. Habicht, M.H. Keisling, B.A. Castañeda, I.S. Bradley, R.S. earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,tetra-methylated brGDGTs out of all brGDGTs) earth science/paleoclimate/climate reconstructions|paleolimnology (temperature,glycerol dialkyl glycerol tetraether,null,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,Dang 2018) earth science/paleoclimate/climate reconstructions|paleolimnology (temperature,glycerol dialkyl glycerol tetraether,null,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,Russell 2018) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIa) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIb') earth science/paleoclimate/paleolimnology (collection water depth,null,null,meter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,sediment,null,dimensionless,null,paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (sample identification,null,null,null,null,climate reconstructions|paleolimnology,null,null,C,Core ID) earth science/paleoclimate/paleolimnology (latitude,null,null,degree north,null,paleolimnology,null,null,C,null) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,present defined as 2015) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIIb) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIIb') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIIc') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIb) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIc') earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (sterol,sediment,null,microgram per gram,null,paleolimnology,null,null,N,concentration of beta-sitosterol and Beta-sitostanol (combined)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,nanogram per square meter per day,null,paleolimnology,null,null,N,brGDGT flux into sediment traps) earth science/paleoclimate/paleolimnology (sample identification,null,null,null,null,paleolimnology,null,null,C,null) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIa') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer Ia) earth science/paleoclimate/paleolimnology (long-chain alkyl diol,sediment,null,microgram per gram,null,paleolimnology,null,null,N,C30 1-13 diol; Volkman et al. (1998)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIa') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer Ib) earth science/paleoclimate/paleolimnology (isomer ratio,soil,null,dimensionless,null,paleolimnology,null,null,N,De Jonge et al. 2015) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,sediment,null,dimensionless,null,paleolimnology,null,null,N,Methylation of branched tetratether index for 5 methyl brGDGTs) earth science/paleoclimate/paleolimnology (collection date,null,null,null,null,paleolimnology,null,null,C,date start) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,microgram per gram,null,paleolimnology,null,null,N,concentration of total brGDGTs - ug/gsed extracted) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIa) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIb') earth science/paleoclimate/paleolimnology (isomer ratio,sediment,null,dimensionless,null,paleolimnology,null,null,N,De Jonge et al. 2015) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,microgram per gram,null,paleolimnology,null,null,N,concentration of total brGDGTs - ug/gsed extracted) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIIa) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer Ia) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIIa) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIIc) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer Ic) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,sediment,null,dimensionless,null,paleolimnology,null,null,N,Methylation of branched tetratether index for 5 methyl brGDGTs; De Jonge et al. 2015) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,sediment,null,dimensionless,null,paleolimnology,anomalized,null,N,MBT'5Me with mean of MBT'5Me over the entire reconstructed interval subtracted) earth science/paleoclimate/paleolimnology (organic compound,sediment,null,microgram per gram,null,paleolimnology,null,null,N,isololiolide and loliolide; Klok et al. (1984); Repeta (1989)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIb) earth science/paleoclimate/paleolimnology (isomer ratio,sediment,null,dimensionless,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (longitude,null,null,degree west,null,paleolimnology,null,null,C,null) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIc) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,sediment,null,dimensionless,null,paleolimnology,null,null,N,Weijers et al. 2007) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,penta-methylated brGDGTs out of all brGDGTs) earth science/paleoclimate/paleolimnology (sterol,sediment,null,microgram per gram,null,paleolimnology,null,null,N,concentration of dinosterol and dinostanol (combined); Volkman et al. (1998)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIIa') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIIc) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIIc') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIc) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer Ic) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,soil,null,dimensionless,null,paleolimnology,null,null,N,Methylation of branched tetratether index for 5 methyl brGDGTs; De Jonge et al. 2015) earth science/paleoclimate/paleolimnology (collection date,null,null,null,null,paleolimnology,null,null,C,date end) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer IIIa') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,isomer Ib) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,sediment,null,percent,null,paleolimnology,null,null,N,hexa-methylated brGDGTs out of all brGDGTs) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIIb) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIIb') earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,soil,null,percent,null,paleolimnology,null,null,N,isomer IIc') earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,soil,null,dimensionless,null,paleolimnology,null,null,N,Weijers et al. 2007) earth science/paleoclimate/paleolimnology (Basin Pond (BASINPND)>LATITUDE 44.47>LONGITUDE -70.05) Paleotemperature reconstructions are essential for distinguishing anthropogenic climate change from natural variability. An emerging method in paleolimnology is the use of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in sediments to reconstruct temperature, but their application is hindered by a limited understanding of their sources, seasonal production, and transport. Here, we report seasonally resolved measurements of brGDGT production in the water column, in catchment soils, and in a sediment core from Basin Pond, a small, deep inland lake in Maine, USA. We find similar brGDGT distributions in both water column and lake sediment samples but the catchment soils have distinct brGDGT distributions suggesting that (1) brGDGTs are produced within the lake and (2) this in situ production dominates the down-core sedimentary signal. Seasonally, depth-resolved measurements indicate that most brGDGT production occurs in late fall, and at intermediate depths (18-30m) in the water column. We utilize these observations to help interpret a Basin Pond brGDGT-based temperature reconstruction spanning the past 900 years. This record exhibits trends similar to a pollen record from the same site and also to regional and global syntheses of terrestrial temperatures over the last millennium. However, the Basin Pond temperature record shows higher-frequency variability than has previously been captured by such an archive in the northeastern United States, potentially attributed to the North Atlantic Oscillation and volcanic or solar activity. This first brGDGT-based multi-centennial paleoreconstruction from this region contributes to our understanding of the production and fate of brGDGTs in lacustrine systems. STUDY NOTES: Branched glycerol dialkyl glycerol tetraethers (brGDGTs) data from sediments, the water column, and nearby soils of Basin Pond, Maine, USA, for the past 900 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Miller, D.R. Investigator : Habicht, M.H. Investigator : Keisling, B.A. Investigator : Castañeda, I.S. Investigator : Bradley, R.S. 2018-11-09 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/25470 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018gdgt.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018soil.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018gdgt.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018soil.txt English https://www.ncdc.noaa.gov/paleo/study/25470 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018gdgt.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018water.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/maine/basinpond2018soil.txt Daniel R. Miller, M. Helen Habicht, Benjamin A. Keisling, Isla S. Castañeda, and Raymond S. Bradley2018A 900-year New England temperature reconstruction from in situ seasonally produced branched glycerol dialkyl glycerol tetraethers (brGDGTs)Climate of the Past14111653-166710.5194/cp-14-1653-2018https://www.clim-past.net/14/1653/2018/ START YEAR: 1117 AD * END YEAR: 2015 AD -70.05 44.47 -70.05 44.47