Bhutan 638 Year Tree-Ring Summer Temperature Reconstruction Krusic, P.J.; Cook, E.R.; Dukpa, D.; Putnam, A.; Rupper, S.; Schaefer, J. Krusic, P.J. Cook, E.R. Dukpa, D. Putnam, A. Rupper, S. Schaefer, J. Air Temperature Reconstruction earth science/paleoclimate/climate reconstructions|tree ring (age,null,null,year Common Era,null,climate reconstructions|tree ring,null,null,N,null) earth science/paleoclimate/climate reconstructions|tree ring (surface temperature,ring width,null,degree Celsius,Jun-Aug,climate reconstructions|tree ring,null,null,N,null) earth science/paleoclimate/instrumental (surface temperature,null,null,degree Celsius,Jun-Aug,instrumental,null,null,N,original calibration and verification instrumental target temperature series (ACT)) earth science/paleoclimate/climate reconstructions|tree ring (number of samples,null,null,count,null,climate reconstructions|tree ring,null,null,N,number of tree ring samples) earth science/paleoclimate/climate reconstructions|tree ring (surface temperature,ring width,null,degree Celsius,Jun-Aug,climate reconstructions|tree ring,filtered,null,N,10 yr low pass filter) earth science/paleoclimate/reconstructions (Ura-Dhur Composite>LATITUDE 27.4223>LONGITUDE 90.9675) High-resolution tree-ring reconstructions from the Himalaya provide essential context for assessing impacts of future climate change on regional water reserves and downstream agriculture. Here we evaluate a small network of tree-ring chronologies from Bhutan to produce a 638-year summer temperature reconstruction, from 1376 - 2013 CE. Relative to the 1950 - 2013 CE average summer temperature three prominent cold periods stand out, 2 in the mid 15th century, and one in the late 17th century. The warmest period began in the first decade of the 21st century coinciding with the timing of general glacier recession in the eastern Himalaya that continues to the present. The Bhutan temperature reconstruction exhibits a significant correlation to known volcanic eruptions (p = 97%) and anomalously cold periods appear to align with solar irradiance minima in the 15th, late 17th and early 19th centuries, implying a link between solar variability and decadal-scale temperature variability. STUDY NOTES: 638 year summer temperature reconstruction for the Bhutan Himalaya, based on Picea spinulosa tree-ring chronologies. Tree-ring data are included in the International Tree-Ring Data Bank, Site Code BT021. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Krusic, P.J. Investigator : Cook, E.R. Investigator : Dukpa, D. Investigator : Putnam, A. Investigator : Rupper, S. Investigator : Schaefer, J. 2015-04-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/18319 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/asia/bhutan/bhutan2015temp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/asia/bhutan/bhutan2015temp.txt English https://www.ncdc.noaa.gov/paleo/study/18319 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/asia/bhutan/bhutan2015temp.txt Krusic, P.J., E.R. Cook, D. Dukpa, A. Putnam, S. Rupper, and J. Schaefer2015638 years of summer temperature variability over the Bhutanese HimalayaGeophysical Research Letters10.1002/2015GL063566http://onlinelibrary.wiley.com/doi/10.1002/2015GL063566/abstract START YEAR: 1376 AD * END YEAR: 2013 AD 90.9675 27.4223 90.9675 27.4223