# Southern and Central Urals Borehole Temperature Reconstruction covering 800-1950 CE #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22472 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/borehole/demezhko2007/demezhko2007-urals.txt # Description: NOAA location of the template # # Original_Source_URL: https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Asi-SourthAndMiddleUrals.Demezhko.2007.txt # Description: NOAA WDS Paleo formatted metadata and data for PAGES 2k v2 version 2.0.0 of this dataset. # Original_Source_URL: https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Asi-SourthAndMiddleUrals.Demezhko.2007.lpd # Description: Linked Paleo Data (LiPD) formatted file containing the same metadata and data as the PAGES 2k v2 file, for version 2.0.0 of this dataset. # # Description/Documentation lines begin with # # Data lines have no # # # Archive: borehole # Parameter_Keywords: physical properties # Dataset_DOI: # #------------------ # Contribution_Date # Date: 2017-05-19 #------------------ # File_Last_Modified_Date # Modified_Date: 2017-05-19 #------------------ # Title # Study_Name: Southern and Central Urals Borehole Temperature Reconstruction covering 800-1950 CE #------------------ # Investigators # Investigators: Demezhko, D.Yu.; Golovanova, I.V. #------------------ # Description_Notes_and_Keywords # Description: Half-centennial resolution. Elevation estimated from GoogleEarth; rounded to 100 m #------------------ # Publication # Authors: Demezhko, D.Yu. and I.V. Golovanova # Published_Date_or_Year: 2007 # Published_Title: Climatic changes in the Urals over the past millennium; an analysis of geothermal and meteorological data # Journal_Name: Climate of the Past # Volume: 3 # Edition: # Issue: # Pages: 237-242 # Report: # DOI: 10.5194/cp-3-237-2007 # Online_Resource: # Full_Citation: # Abstract: This investigation is based on a study of two paleoclimatic curves obtained in the Urals (51–59° N, 58–61° E): i) a ground surface temperature history (GSTH) reconstruction since 800 A.D. and ii) meteorological data for the last 170 years. Temperature anomalies measured in 49 boreholes were used for the GSTH reconstruction. It is shown that a traditional averaging of the histories leads to the lowest estimates of amplitude of past temperature fluctuations. The interval estimates method, accounting separately for the rock's thermal diffusivity variations and the influence of a number of non-climatic causes, was used to obtain the average GSTH. Joint analysis of GSTH and meteorological data bring us to the following conclusions. First, ground surface temperatures in the Medieval maximum during 1100–1200 were 0.4 K higher than the 20th century mean temperature (1900–1960). The Little Ice Age cooling was culminated in 1720 when surface mean temperature was 1.6 K below the 20th century mean temperature. Secondly, contemporary warming began approximately one century prior to the first instrumental measurements in the Urals. The rate of warming was +0.25 K/100 years in the 18th century, +1.15 K/100 years in the 19th and +0.75 K/100 years in the first 80 years of the 20th century. Finally, the mean rate of warming increased in the final decades of 20th century. An analysis of linear regression coefficients in running intervals of 21 and 31 years, shows that there were periods of warming with almost the same rates in the past, including the 19th century. #------------------ # Funding_Agency # Funding_Agency_Name: # Grant: #------------------ # Site_Information # Site_Name: Southern and Central Urals # Location: Russia # Country: # Northernmost_Latitude: 59 # Southernmost_Latitude: 51 # Easternmost_Longitude: 61 # Westernmost_Longitude: 58 # Elevation: 1900 #------------------ # Data_Collection # Collection_Name: Urals Temp Demezhko2007 # Earliest_Year: 800 # Most_Recent_Year: 1950 # Time_Unit: AD # Core_Length: # Notes: #------------------ # Species # Species_Name: # Species_Code: # Common_Name: #------------------ # Chronology_Section # Chronology: #------------------ # Variables # # Data variables follow that are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components ( 10 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data, additional_information) # ## year age, ,,years CE, , borehole, ,,N, ## temp_anom surface temperature anomaly,, ,degrees Celsius,, borehole, GST anomaly relative to (800-1950) mean, borehole temperature inversion (see Demezhko; D. Y.; Shchapov; V. A.; Glob. Planet. Change; 29; 219–230; 2001), N, # #------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header) # Missing_Values: nan # year temp_anom 800.0 0.166 850.0 0.264 900.0 0.354 950.0 0.447 1000.0 0.538 1050.0 0.62 1100.0 0.686 1150.0 0.724 1200.0 0.716 1250.0 0.649 1300.0 0.508 1350.0 0.336 1400.0 0.126 1450.0 -0.091 1500.0 -0.354 1550.0 -0.624 1600.0 -0.879 1650.0 -1.094 1700.0 -1.224 1750.0 -1.186 1800.0 -0.906 1850.0 -0.411 1900.0 0.118 1950.0 0.516