Bear Lake, Utah-Idaho 19,000 Year Diatom Data Moser, K.A.; Kimball, P. Moser, K.A. Kimball, P. earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Nitzschia fonticola) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Achnanthes saccula) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula reinhardtii) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Diploneis oblongella) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella minuta) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Hantzschia virgata var. capitellata) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Stephanodiscus niagarae) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cyclotella schumannii) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Amphora perpusilla) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella naviculiformis) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Gomphonema angustum) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Thalassiosira visurgis) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Pseudostaurosira brevistriata) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Staurosira brevistriata rhomboid) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Fragilaria capucina) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Achnanthes clevei) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula cryptocephala) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Diploneis marginestriata) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Caloneis sp. Bear Lake) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella caespitosa) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella mesiana) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Surirella bohemica) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Surirella linearis) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cosmioneis pusilla var. incognita) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula scutelloides) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Stauroneis javanica) earth science/paleoclimate/paleolimnology (identified 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ocellata) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cocconeis placentula var. lineata) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Amphora ovalis) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella sinuata) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Surirella ovalis) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Epithemia frickei) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Skeletonema subsalsum) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Nitzschia sp.) earth science/paleoclimate/paleolimnology (identified 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diatom,null,null,count,null,paleolimnology,null,null,N,total diatoms) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Surirella turgida) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,unspecified diatom unidentified girdle view) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula capitata var.lueneburgensis) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula pupula) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula crucicula) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Caloneis schumanniana) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella reichardtii) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Hantzschia amphioxys) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cyclotella antiqua) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella tynnii) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cymbella aspera) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Surirella minuta) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula globulifera) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,actual) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,adjusted) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Staurosira brevistriata oval) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Staurosirella leptostauron) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Achnanthes minutissima) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula rhynchocephala) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cyclotella sp.) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Diploneis elliptica) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Cocconeis stauroneiformis) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Stauroneis anceps var. siberica) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Surirella elegans) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula pygmaea) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Caloneis silicula) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Neidium distinctepunctatum) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Neidium dubium) earth science/paleoclimate/paleolimnology (identified diatom,null,null,percent,null,paleolimnology,null,null,N,Navicula placentula) earth science/paleoclimate/paleolimnology (Bear Lake Utah/Idaho>LATITUDE 42>LONGITUDE -111.3333) Changes in diatom fossil assemblages from lake sediment cores indicate variations in hydrologic and climatic conditions at Bear Lake (Utah-Idaho) during the late glacial and Holocene. From 19.1 to 13.8 cal ka there is an absence of well-preserveddiatoms because prolonged ice cover and increased turbidity from glacier-fed Bear River reduced light and limited diatom growth. The first well-preserved diatoms appear at 13.8 cal ka. Results of principal components analysis (PCA) of the fossildiatom assemblages from 13.8 cal ka to the present track changes related to fluctuations of river inputs and variations of lake levels. Diatom abundance data indicate that the hydrologic balance between 13.8 and 7.6 cal ka is strongly tied to river inputs,whereas after 7.6 cal ka the hydrologic balance is more influenced by changes in lake evaporation. Wet conditions maintained high river inputs from 13.8 to 10.8 cal ka and from 9.2 to 7.6 cal ka, with a dry interval between 10.8 and 9.2 cal ka. After 9.2 cal kauntil 2.9 cal ka lake levels were high except for two periods, one between 7.6 and 5.8 cal ka and one between 4.3 and 3.8 cal ka, as a result of decreased effective moisture. After 2.9 cal ka, fossil diatom assemblages suggest drier conditions until 1.6 cal ka to the present, when fragments of large, pennate diatoms appear, possibly the result of a rapid lake transgression. Although similarities exist between the Bear Lake records and other western hydrologic and climatic records, the covariations are not strong. Our data suggest that climatic regimes at Bear Lake have changedfrequently over time, perhaps as a consequence of the position of several important climatic boundaries near Bear Lake. STUDY NOTES: Diatom data from sediment cores 96-1, 96-2, and 98-10, Bear Lake, Utah-Idaho (USA). NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Moser, K.A. Investigator : Kimball, P. 2009-03-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/8652 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/utah/bearlake/bearlake2009diatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/utah/bearlake/bearlake2009diatom.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/utah/bearlake/bearlake2009diatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/utah/bearlake/bearlake2009diatom.xls English https://www.ncdc.noaa.gov/paleo/study/8652 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/utah/bearlake/bearlake2009diatom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/utah/bearlake/bearlake2009diatom.xls Moser, K.A., Kimball, P. 2009. A 19,000-year record of hydrologic and climatic change inferred from diatoms from Bear Lake, Utah and Idaho. Geological Society of America Special Paper, 450, 229-246. START YEAR: 14569 cal yr BP * END YEAR: 744 cal yr BP -111.3333 42 -111.3333 42