noaa-recon-19299 Bear River, Utah 1,200 Year Streamflow Reconstruction DeRose, R.J.; Bekker, M.F.; Wang, S.-Y.; Buckley, B.M.; Kjelgren, R.; Bardsley, T.; Rittenour, T.M.; Allen, E.B. Bear River, Utah 1,200 Year Streamflow Reconstruction 2015-09-29 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19299 Investigator R.J. DeRose Investigator M.F. Bekker Investigator S.-Y. Wang Investigator B.M. Buckley Investigator R. Kjelgren Investigator T. Bardsley Investigator T.M. Rittenour Investigator E.B. Allen 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 instrumental streamflow,null,null,cubic meter per second,Oct-Sep,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|tree ring streamflow,null,null,cubic meter per second,Oct-Sep,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate reconstructions streamflow geoscientificInformation Streamflow Reconstruction JUOS Juniperus osteosperma (Torr.) Little Utah juniper 800 AD 2010 AD 1150 cal yr BP -60 cal yr BP Complete 40.9653 40.9653 -110.8528 -110.8528 2428 2428 Continent North America United States Of America Utah Bear River Headwaters (USGS gage 10011500)>LATITUDE 40.9653>LONGITUDE -110.8528 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII R.J. DeRose, M.F. Bekker, S.-Y. Wang, B.M. Buckley, R.K. Kjelgren, T. Bardsley, T.M. Rittenour, E.B. Allen 2015 Journal of Hydrology 529 2 524-534 10.1016/j.jhydrol.2015.01.014 http://www.sciencedirect.com/science/article/pii/S0022169415000311

The Bear River contributes more water to the eastern Great Basin than any other river system. It is also the most significant source of water for the burgeoning Wasatch Front metropolitan area in northern Utah. Despite its importance for water resources for the region's agricultural, urban, and wildlife needs, our understanding of the variability of Bear River's stream flow derives entirely from the short instrumental record (1943-2010). Here we present a 1200-year calibrated and verified tree-ring reconstruction of stream flow for the Bear River that explains 67% of the variance of the instrumental record over the period from 1943 to 2010. Furthermore, we developed this reconstruction from a species that is not typically used for dendroclimatology, Utah juniper (Juniperus osteosperma). We identify highly significant periodicity in our reconstruction at quasi-decadal (7-8 year), multi-decadal (30 year), and centennial (>50 years) scales. The latter half of the 20th century was found to be the 2nd wettest (~40-year) period of the past 1200 years, while the first half of the 20th century marked the 4th driest period. The most severe period of reduced stream flow occurred during the Medieval Warm Period (ca. mid-1200s CE) and persisted for ~70 years. Upper-level circulation anomalies suggest that atmospheric teleconnections originating in the western tropical Pacific are responsible for the delivery of precipitation to the Bear River watershed during the October-December (OND) season of the previous year. The Bear River flow was compared to recent reconstructions of the other tributaries to the Great Salt Lake (GSL) and the GSL level. Implications for water management could be drawn from the observation that the latter half of the 20th century was the 2nd wettest in 1200 years, and that management for future water supply should take into account the stream flow variability over the past millennium. STUDY NOTES: Tree-ring-based reconstruction of Bear River, Utah streamflow over the past 1200 years. Utah Juniper tree-ring data are archived in the International Tree-Ring Data Bank, Site Code UT541: https://www.ncdc.noaa.gov/paleo/study/19359

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/northamerica/usa/utah/bear2015flow.txt Data File; Bear River Streamflow Reconstruction USA/NOAA DIF Version 9.8.4 2019-02-11 2019-02-11