Lake Radon, Pyrenees Temperature Reconstruction from Chrysophyte cysts covering 578-1994 CE Pla, S.; Catalan, J. Pla, S. Catalan, J. Air Temperature Reconstruction earth science/paleoclimate/climate reconstructions|paleolimnology (sample identification,null,null,null,null,climate reconstructions|paleolimnology,null,null,C,null) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (temperature,chrysophyte assemblage,unspecified margin of error,degree Celsius,null,climate reconstructions|paleolimnology,anomalized,modern analogue technique,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (sample identification,null,null,null,null,climate reconstructions|paleolimnology,null,null,C,sample name) earth science/paleoclimate/climate reconstructions|paleolimnology (temperature,chrysophyte assemblage,unspecified margin of error,degree Celsius,null,climate reconstructions|paleolimnology,anomalized,modern analogue technique,N,winter/spring) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (temperature,chrysophyte assemblage,null,degree Celsius,null,climate reconstructions|paleolimnology,anomalized,modern analogue technique,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (temperature,chrysophyte assemblage,null,degree Celsius,null,climate reconstructions|paleolimnology,anomalized,modern analogue technique,N,winter/spring) earth science/paleoclimate/paleolimnology (Lake Redon>LATITUDE 42.6425>LONGITUDE .770278) In the last decade, much effort was dedicated to the reconstruction of past climate at high temporal resolution. Here, we show the suitability of chrysophyte cysts from lake sediments for revealing continental climate variability when used in sensitive sites, such as those in high mountains. We demonstrate that altitude is a main factor influencing the present distribution of chrysophytes and develop a transfer function to evaluate the local “altitude anomaly” on a lake site throughout time. Based on our knowledge of chrysophyte ecology, the altitude anomalies are interpreted as winter/spring climate signatures. The method was applied to a Holocene record from a lake in the Pyrenees showing submillennial climatic variability in this northwestern Mediterranean zone. A warming trend was present from the early Holocene to 4 kyear BP. Comparison with pollen-based reconstructions of summer temperatures denoted a contrasting decrease in continentality between the two parts of the Holocene. Oscillations of 1 cycle per ca. 2,000 years appeared throughout the record. The warmest Holocene winters were recorded during the Medieval Warm Period at ca. AD 900 and 450 and the Roman Warm Period (2.7–2.4 kyear BP). Winters in the period AD 1,050–1,175 were inferred to be as cold as in the Little Ice Age. The period between 3 and 7 kyear BP showed lower intensity in the fluctuations than in early and late Holocene. The cold event, 8,200 years ago, appeared embedded in a warm fluctuation. Another cold fluctuation was recorded around 9 kyear BP, which is in agreement with Irish and Greenland records. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Pla, S. Investigator : Catalan, J. 2017-05-19 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22582 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/spain/pla2004-pyrenee.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Eur-CentralandEasternPyrenees.Pla.2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Eur-CentralandEasternPyrenees.Pla.2004.lpd https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/spain/pla2004-pyrenee.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Eur-CentralandEasternPyrenees.Pla.2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Eur-CentralandEasternPyrenees.Pla.2004.lpd English https://www.ncdc.noaa.gov/paleo/study/22582 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/spain/pla2004-pyrenee.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Eur-CentralandEasternPyrenees.Pla.2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Eur-CentralandEasternPyrenees.Pla.2004.lpd Pla, Sergi and Jordi Catalan2004Chrysophyte cysts from lake sediments reveal the submillennial winter/spring climate variability in the northwestern Mediterranean region throughout the HoloceneClimate Dynamics24263-27810.1007/s00382-004-0482-1 START YEAR: 578 AD * END YEAR: 1994 AD .770278 42.6425 .770278 42.6425