Raw data for the Surprise Lake diatom surface sample dataset obtained from the Neotoma Paleoecolo... more Raw data for the Surprise Lake diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Terrace Pond diatom surface sample dataset obtained from the Neotoma Paleoecolog... more Raw data for the Terrace Pond diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Surprise Lake water chemistry dataset obtained from the Neotoma Paleoecological ... more Raw data for the Surprise Lake water chemistry dataset obtained from the Neotoma Paleoecological Database.
Raw data for the Bunker Pond diatom surface sample dataset obtained from the Neotoma Paleoecology... more Raw data for the Bunker Pond diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Stickle Pond diatom surface sample dataset obtained from the Neotoma Paleoecolog... more Raw data for the Stickle Pond diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Iliff Lake diatom surface sample dataset obtained from the Neotoma Paleoecology ... more Raw data for the Iliff Lake diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Greenwood Lake diatom surface sample dataset obtained from the Neotoma Paleoecol... more Raw data for the Greenwood Lake diatom surface sample dataset obtained from the Neotoma Paleoecological Database.
Raw data for the Mountain Lake diatom surface sample dataset obtained from the Neotoma Paleoecolo... more Raw data for the Mountain Lake diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Turtle Pond water chemistry dataset obtained from the Neotoma Paleoecology Datab... more Raw data for the Turtle Pond water chemistry dataset obtained from the Neotoma Paleoecology Database.
Abstract:We developed a quantitative chironomid-July air temperature inference model based on sur... more Abstract:We developed a quantitative chironomid-July air temperature inference model based on surface sediments from 81 Swiss lakes and applied it to the Holocene subfossil chironomid record of Hinterburgsee, a small subalpine lake in the northern Swiss Alps (present-day mean July air temperature of 11.3°C). After smoothing to reduce the high between-sample variability of inferred temperatures, the reconstruction indicates July air temperatures of 10.4– 10.9°C at the end of the Younger Dryas, of 11.9–12.8°C during the early and mid-Holocene (11500–4000 cal. BP), and slightly lower temperatures of 11.5–12.0°C during the late Holocene (3500–1000 cal. BP). A warming trend inferred for the past millennium is most likely an artifact of human impact on Hinterburgsee’s chironomid fauna, rather than a genuine temperature signal. The most prominent climatological events during the Holocene were two periods of lower temperatures at c. 10700–10500 cal. BP and 8200–7700 cal. BP and an abrupt sh...
Paleo surface wind for southern Quebec was inferred quantitatively for the past 9500 years from d... more Paleo surface wind for southern Quebec was inferred quantitatively for the past 9500 years from diatom assemblages archived in the sediment of the shallow mountain Lac du Sommet using biweekly sediment trap samples along an elevation gradient in the study area. The wind reconstruction was compared with diatom-inferred dissolved organic carbon concentration, chironomid-inferred mean August air temperature, pollen, grain size and losson-ignition. Increased lake circulation, interpreted as indicating stronger surface winds, was inferred from diatoms around 8700, 4500, 3000 to 2000 cal. yr BP and during the past 250 years. Increased lake stratification was diatom-inferred from 7500 to 5000 cal. yr BP and between 1500 and 500 cal. yr BP. Diatom-inferred paleowinds were congruent with the regional fire history. In general, diatom production was significantly correlated with diatom-inferred lake circulation. Diatom-inferred lake circulation and diatom production were not correlated with th...
Raw data for the Surprise Lake diatom surface sample dataset obtained from the Neotoma Paleoecolo... more Raw data for the Surprise Lake diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Terrace Pond diatom surface sample dataset obtained from the Neotoma Paleoecolog... more Raw data for the Terrace Pond diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Surprise Lake water chemistry dataset obtained from the Neotoma Paleoecological ... more Raw data for the Surprise Lake water chemistry dataset obtained from the Neotoma Paleoecological Database.
Raw data for the Bunker Pond diatom surface sample dataset obtained from the Neotoma Paleoecology... more Raw data for the Bunker Pond diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Stickle Pond diatom surface sample dataset obtained from the Neotoma Paleoecolog... more Raw data for the Stickle Pond diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Iliff Lake diatom surface sample dataset obtained from the Neotoma Paleoecology ... more Raw data for the Iliff Lake diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Greenwood Lake diatom surface sample dataset obtained from the Neotoma Paleoecol... more Raw data for the Greenwood Lake diatom surface sample dataset obtained from the Neotoma Paleoecological Database.
Raw data for the Mountain Lake diatom surface sample dataset obtained from the Neotoma Paleoecolo... more Raw data for the Mountain Lake diatom surface sample dataset obtained from the Neotoma Paleoecology Database.
Raw data for the Turtle Pond water chemistry dataset obtained from the Neotoma Paleoecology Datab... more Raw data for the Turtle Pond water chemistry dataset obtained from the Neotoma Paleoecology Database.
Abstract:We developed a quantitative chironomid-July air temperature inference model based on sur... more Abstract:We developed a quantitative chironomid-July air temperature inference model based on surface sediments from 81 Swiss lakes and applied it to the Holocene subfossil chironomid record of Hinterburgsee, a small subalpine lake in the northern Swiss Alps (present-day mean July air temperature of 11.3°C). After smoothing to reduce the high between-sample variability of inferred temperatures, the reconstruction indicates July air temperatures of 10.4– 10.9°C at the end of the Younger Dryas, of 11.9–12.8°C during the early and mid-Holocene (11500–4000 cal. BP), and slightly lower temperatures of 11.5–12.0°C during the late Holocene (3500–1000 cal. BP). A warming trend inferred for the past millennium is most likely an artifact of human impact on Hinterburgsee’s chironomid fauna, rather than a genuine temperature signal. The most prominent climatological events during the Holocene were two periods of lower temperatures at c. 10700–10500 cal. BP and 8200–7700 cal. BP and an abrupt sh...
Paleo surface wind for southern Quebec was inferred quantitatively for the past 9500 years from d... more Paleo surface wind for southern Quebec was inferred quantitatively for the past 9500 years from diatom assemblages archived in the sediment of the shallow mountain Lac du Sommet using biweekly sediment trap samples along an elevation gradient in the study area. The wind reconstruction was compared with diatom-inferred dissolved organic carbon concentration, chironomid-inferred mean August air temperature, pollen, grain size and losson-ignition. Increased lake circulation, interpreted as indicating stronger surface winds, was inferred from diatoms around 8700, 4500, 3000 to 2000 cal. yr BP and during the past 250 years. Increased lake stratification was diatom-inferred from 7500 to 5000 cal. yr BP and between 1500 and 500 cal. yr BP. Diatom-inferred paleowinds were congruent with the regional fire history. In general, diatom production was significantly correlated with diatom-inferred lake circulation. Diatom-inferred lake circulation and diatom production were not correlated with th...
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