noaa-recon-15445 Kherlen River, Mongolia 385 Year Streamflow Reconstruction Davi, N.K.; Pederson, N.; Leland, C.; Nachin, B.; Suran, B.; Jacoby, G.C. Kherlen River, Mongolia 385 Year Streamflow Reconstruction 2013-11-18 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/15445 Investigator N.K. Davi Investigator N. Pederson Investigator C. Leland Investigator B. Nachin Investigator B. Suran Investigator G.C. Jacoby 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 streamflow,null,null,cubic meter per second,annual,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate reconstructions streamflow geoscientificInformation Streamflow Reconstruction hydrology 1622 AD 2007 AD 328 cal yr BP -57 cal yr BP Complete 47.3121 47.3121 110.6644 110.6644 1032 1032 Continent Asia Eastern Asia Mongolia Undurkhaan>LATITUDE 47.3121>LONGITUDE 110.6644 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 Nicole K. Davi, Neil Pederson, Caroline Leland, Baatarbileg Nachin, Byambagerel Suran, Gordon C. Jacoby 2013 Water Resources Research 49 1 151-158 10.1029/2012WR011834

Temperatures in semiarid Mongolia have rapidly risen over the past few decades, and increases in drought, urban development, mining, and agriculture have intensified demands on limited water resources. Understanding long-term streamflow variation is critical for Mongolia, particularly if alterations in streamflow are being considered and because of the potential negative impacts of drought on the animal agriculture sector. Here, we present a temporally and spatially improved streamflow reconstruction for the Kherlen River. We have added 11 new records in comparison with two in the original 2001 reconstruction. This new reconstruction extends from 1630 to 2007 and places the most recent droughts in a multicentennial perspective. We find that variations in streamflow have been much greater in the past than in the original study. There was higher variability in the mid to late 1700s, ranging from severe and extended drought conditions from 1723 to 1739 and again in 1768-1778 to two decadal length episodes of very wet conditions in the mid 1700s and late 1700s. Reduced amplitude is seen in the mid-1800s, and several pluvial events are reconstructed for the 1900s. Although recent droughts are severe and disturbing economic and ecological systems in Mongolia and it appears that eastern Mongolia is drying, the drying trend since the late 1900s might in fact be accentuated by a change from a particularly wet era in Mongolia. The recent drought might be a return to more characteristic hydroclimatic conditions of the past four centuries in Mongolia. STUDY NOTES: Tree ring based reconstruction of annual river flow on the Kherlen River, Mongolia for the past 385 years. The reconstruction updates and improves on the previous reconstruction of the Kherlen River by Pederson et al. [2001] through increased spatial and temporal tree-ring replication and the use of nested model methods that add 40 years to the original Pederson et al. [2001] reconstruction. The updated tree-ring network is composed of 13 records that cover substantially more of the Kherlen River headwater region than the original reconstruction. River flow is reconstructed for the Undurkhaan gauge on the Kherlen River (47N, 111E, 1032 m, 1959-2008AD).

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/mongolia/kherlen2013flow.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11