VARDA (VARved sediments DAtabase) – providing and connecting proxy data from annually laminated lake sediments
نویسندگان
چکیده
منابع مشابه
The variability of holocene climate change: evidence from varved lake sediments.
Varved sediments from a lake near the present forest-prairie border in northwestern Minnesota provide an annual record of climate change for the last 10,400 years. Climate-sensitive mineral, chemical, and biological components show that the mid-Holocene dry interval between 8500 and 4000 years ago is asymmetrical and actually consists of two distinct drier pulses separated by a moister interval...
متن کاملThe climatic signal in varved sediments from Lake C2, northern Ellesmere Island, Canada
Annually-laminated clastic sediments preserve a high resolution proxy record of paleoclimate, provided that allochthonous sedimentation represents a response to meteorological forcing of watershed sediment transfer. Here, we demonstrate this linkage, and illustrate a calibration process using the most recent 40 years of a varve record from Lake C2 (82~ t N; 78000 ' W), three years of field meas...
متن کاملHow well do sediment indicators record past climate? An evaluation using annually laminated sediments
The reliability of paleoclimatic inferences from lake-sediment records rests on the understanding of how various sediment indicators respond to environmental changes. Despite the recent proliferation of paleoclimatic records, only a limited number of studies have rigorously evaluated potential indicators by comparing lake-sediment records with instrumental weather data. We analyzed annually lam...
متن کاملBacterial magnetite in Swedish varved lake-sediments: a potential bio-marker of environmental change
Detailed mineral magnetic measurements were carried out on three varved lake-sediment sequences in Sweden, which extend to ca. 7000BC. The comparison of the magnetic properties of the organic rich varved lake-sediments with their respective catchment materials indicates that the magnetic properties of the sediments are dominated by relatively high concentrations of single-domain magnetite magne...
متن کاملDeciphering climatic history from lake sediments
Reconstructing climate from lake sediments can be challenging, because the response of lakes and various components of lake systems are mediated by non-climatic factors, such as geomorphic and hydrologic stetting. As a result, the magnitude of lake response to climatic forcing may be non-linear. In addition, changes in the lake system associated with the aging process or non-climatic influences...
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ژورنال
عنوان ژورنال: Earth System Science Data
سال: 2020
ISSN: 1866-3516
DOI: 10.5194/essd-12-2311-2020