NOAA/WDS Paleoclimatology - San Francisco Bay Northern Estuary 625 Year Salinity Reconstruction
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Climate Reconstruction. The data include parameters of climate reconstructions|tree ring with a geographic location of California, United States Of America. The time period coverage is from 571 to -53 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
Dataset Citation
- Cite as: 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. (2014-11-05): NOAA/WDS Paleoclimatology - San Francisco Bay Northern Estuary 625 Year Salinity Reconstruction. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/smfy-kq56. Accessed [date].
- Please refer to Credit tab for full citation information.
Dataset Identifiers
- doi:10.25921/smfy-kq56
- noaa-recon-17395
- NCEI DSI 1200_02
- NCEI DSI 1200_01
ISO 19115-2 Metadata
noaa-recon-17395
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: 1379 CE to 2003 CE; Date Range: 571 cal yr BP to -53 cal yr BP; |
Time Period | 1379 to 2003 |
Spatial Bounding Box Coordinates |
West: -121.842735
East: -121.842735
South: 38.067975
North: 38.067975
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns |
Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information | 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. ABSTRACT SUPPLIED BY ORIGINATOR: 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. |
Purpose | Records of past temperature, precipitation, and other climate variables derived from paleoclimate proxies. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set citations. |
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Global Change Master Directory (GCMD) Science Keywords
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Last Modified: 2024-04-11
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov