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Noah Knowles

Research Hydrologist

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Short Biography

My work involves the application of climate science, numerical modeling, and analysis of large datasets to diverse natural systems. I work both alone and in multidisciplinary projects studying systems in which climate change in various manifestations could have an important influence. My work has included documenting hydrometeorological changes on a west-wide scale, hydrologic changes in California, and estuarine water-quality issues associated with climate change. Since 2006, I have been involved with a large, multidisciplinary project to assess the impacts of projected climate change on California's primary hydrological system, the San Francisco Estuary and its watershed.



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Publications

Knowles, N., 2010. Potential inundation due to rising sea levels in the San Francisco Bay region. San Francisco Estuary and Watershed Science, 8:1. [Link]

Dettinger, M.D., H. Hidalgo, T. Das, Cayan, D.R., and Knowles, N., 2009. Projections of potential flood regime changes in California. California Climate Change Center publication CEC-500-2009-050-F, 68 pages. [Link]

Ganju, N.K., Knowles, N., and Schoellhamer, D.H., 2008. Temporal downscaling of decadal sediment load estimates to a daily interval for use in hindcast simulations. Journal of Hydrology 349(3-4): 512-523. [Link]

Knowles, N., Dettinger, M.D., and Cayan, D.R., 2006. Trends in snowfall versus rainfall in the western United States. Journal of Climate, 19(18), 4545–4559. [Link]

Cloern, J. E., Schraga, T.S., Lopez, C.B., Knowles, N., Labiosa, R.G., and Dugdale, R., 2005. Climate anomalies generate an exceptional dinoflagellate bloom in San Francisco Bay. Geophysical Research Letters, 32, L14608. [Link]

Knowles, N. and Cayan, D.R., 2004. Elevational dependence of projected hydrologic changes in the San Francisco Estuary and watershed. Climatic Change, 62, 319-336. [Link]

Cayan, D.R., Dettinger, M.D., Redmond, K., McCabe, G., Knowles, N., and Peterson, D.H., 2003. "The transboundary setting of California's water and hydropower systems—linkages between the Sierra Nevada, Columbia, and Colorado hydroclimates", book chapter. [Link]

Dettinger, M.D., Bennett, W.A., Cayan, D.R., Florsheim, J., Hughes, M., Ingram, B.L., Jassby, A., Knowles, N., Malamud, F., Peterson, D.H., Redmond, K., and Smith, L., 2003. Climate science issues and needs of the CALFED Bay-Delta Program. American Meteorological Society, 83rd Annual Meeting, Impacts of Water Variability Symposium, Long Beach, California, 7.11-1 to 7.11-4. [Link]

Knowles, N., 2002. Natural and human influences on freshwater inflows and salinity in the San Francisco Estuary at monthly to interannual scales. Water Resources Research, 38, 25-1-25-11. [Link]

Knowles, N. and Cayan, D.R., 2002. Potential effects of global warming on the Sacramento/San Joaquin watershed and the San Francisco Estuary. Geophysical Research Letters, 29, 38-1-38-4. [Link]

Stahle, D., Therrell, M., Cleaveland, M.K., Cayan, D.R., Dettinger, M.D., and Knowles, N., 2001. Ancient blue oaks reveal human impact on San Francisco Bay salinity. EOS: Transactions, American Geophysical Union, 82(12). [Link]

Knowles, N. 2000. Modeling the hydroclimate of the San Francisco Bay-Delta Estuary and watershed. Doctoral Dissertation, Scripps Institution of Oceanography. La Jolla, California, University of California, San Diego. [Link]





My USGS Science Strategy Areas

Understanding Ecosystems & Predicting Ecosystems Change

Climate Variability & Change

Related Web Sites

CASCaDE Project

Sea level rise and San Francisco Bay


Contact Information

Noah Knowles
Bldg 15, McKelvey Building, 345 Middlefield Road
Menlo Park, CA 94025-3561
nknowles@usgs.gov
650-329-4476
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