noaa-recon-17395 San Francisco Bay Northern Estuary 625 Year Salinity Reconstruction Stahle, D.W.; Griffin, R.D.; Cleaveland, M.K.; Edmondson, J.R.; Fye, F.K.; Burnette, D.J.; Abatzoglou, J.T.; Redmond, K.T.; Meko, D.M.; Dettinger, M.D.; Cayan, D.R.; Therrell, M.D. San Francisco Bay Northern Estuary 625 Year Salinity Reconstruction 2014-11-05 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/17395 Investigator D.W. Stahle Investigator R.D. Griffin Investigator M.K. Cleaveland Investigator J.R. Edmondson Investigator F.K. Fye Investigator D.J. Burnette Investigator J.T. Abatzoglou Investigator K.T. Redmond Investigator D.M. Meko Investigator M.D. Dettinger Investigator D.R. Cayan Investigator M.D. Therrell 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 salinity,null,null,kilometer,Feb-Jun,climate reconstructions|tree ring,null,null,N,Low salinity zone positions in kilometers from the Golden Gate earth science paleoclimate reconstructions salinity geoscientificInformation ENSO Other Hydroclimate Reconstruction drought QUDG Quercus douglasii Hook. and Arn. blue oak 1379 AD 2003 AD 571 cal yr BP -53 cal yr BP Complete 38.067975 38.067975 -121.842735 -121.842735 1 1 Continent North America United States Of America California San Francisco Bay Northern Estuary>LATITUDE 38.067975>LONGITUDE -121.842735 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 David W. Stahle, R. Daniel Griffin, Malcolm K. Cleaveland, Jesse R. Edmondson, Falko K. Fye, Dorian J. Burnette, John T. Abatzoglou, Kelly T. Redmond, David M. Meko, Micheal D. Dettinger, Daniel R. Cayan, Matthew D. Therrell 2011 San Francisco Estuary and Watershed Science 9 1 http://escholarship.org/uc/item/5cz3q8v4

Blue oak tree-ring chronologies correlate highly with winter-spring precipitation totals over California, with Sacramento and San Joaquin river stream flow, and with seasonal variations in the salinity gradient in San Francisco Bay. The convergence of fresh and saline currents can influence turbidity, sediment accumulation, and biological productivity in the estuary. Three selected blue oak chronologies were used to develop a 625-year-long reconstruction of the seasonal salinity gradient, or low salinity zone (LSZ), which provides a unique perspective on the interannual-to-decadal variability of this important estuarine habitat indicator. The reconstruction was calibrated with instrumental LSZ data for the winter-spring season, and explains 73% of the variance in the February-June position of the LSZ from 1956 to 2003. Because this calibration period post-dates the sweeping changes that have occurred to land cover, channel morphology, and natural streamflow regimes in California, the reconstruction provides an idealized estimate for how the LSZ might have fluctuated under the seasonal precipitation variations of the past 625 years, given the modern geometry and bathymetry of the estuary and land cover across the drainage basin. The February-June season integrates precipitation and runoff variability during the cool season, and does not extend into the late-summer dry season when LSZ extremes can negatively affect Sacramento-San Joaquin Delta (Delta) agriculture and some aquatic organisms. However, there is such strong inter-seasonal persistence in the instrumental LSZ data that precipitation totals during the cool season can strongly pre-condition LSZ position in late summer. The 625-year-long reconstruction indicates strong interannual and decadal variability, the frequent recurrence of consecutive 2-year LSZ maxima and minima, large-scale ocean atmospheric forcing, and an interesting asymmetrical influence of warm El Nino-Southern Oscillation (ENSO) events. STUDY NOTES: Reconstruction of the position of the low salinity zone (LSZ) in the San Francisco Bay Northern Estuary for the past 625 Years, based on 3 northern California blue oak tree-ring chronologies. Reconstructed parameter is the February–June seasonal LSZ position, in kilometers from the Golden Gate.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/california/sfbay2011salinity.txt Data File; San Francisco Bay Northern Estuary Low Salinity Zone Position Reconstruction USA/NOAA DIF Version 9.8.4 2019-06-03 2019-06-03