• Rainbow over Half Dome

    Yosemite

    National Park California

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  • Road Closures Due to El Portal Fire

    The Big Oak Flat Road between Crane Flat and the El Portal Road is temporarily closed. There is no access to Yosemite Valley via the Big Oak Flat Road or Highway 120. Tioga Road is open and accessible via Big Oak Flat and Tioga Pass Entrances. More »

  • Campground Closures Due to Fire

    Crane Flat, Bridalveil Creek, and Yosemite Creek Campgrounds are temporarily closed. More »

  • Yosemite National Park is Open

    Yosemite Valley, Glacier Point, and Wawona/Mariposa Grove areas are open and accessible via Highways 140 and 41. Tioga Road is not accessible via Highways 140 and 41 due to a fire.

Hydrology and Climate References

A hydrologist reaches into a water sampling machine
A Yosemite National Park technician services an automatic water sampler and downloads data as a part of a water quality study.
 
Bales, R. C., N. P. Molotch, T. H. Painter, M. D. Dettinger, R. Rice, and J. Dozier (2006), Mountain hydrology of the western United States, Water Resources Research, 42(W08432, doi:10.1029/2005WR004387), 13.

Barnett, T., J. Adam, and D. Lettenmaier (2005), Potential impacts of a warming climate on water availability in snow-dominated regions, Nature, 438(7066), 303-309.

Cayan, D. R., E. P. Maurer, M. D. Dettinger, M. Tyree, and K. Hayhoe (2007), Climate change scenarios for the California region, Climatic Change, 87(Supplement 1), 21-42.

Dettinger, M. (2005), Changes in Streamflow Timing in the Western United States in Recent DecadesRep., 4 pp, National Streamflow Information Program, U.S. Geological Survey, Scripps Institution of Oceanography, La Jolla, California.

Dettinger, M., K. Redmond, and D. Cayan (2005), Winter Orographic-Precipitation Ratios in the Sierra Nevada - Large-Scale Atmospheric Circulations and Hydrologic Consequences, Journal of Hydrometeorology, 5, 1102-1116.

Dettinger, M.D., D.R. Cayan, M.K. Meyer, and A.E. Jeton (2004), Simulated Hydrologic Responses to Climate Variations and Change in the Merced, Carson, and American River Basins, Sierra Nevada, California, 1900–2099. Climate Change, 62, 283-317.

Dettinger, M., D. Cayan, N. Knowles, A. Westerling, and M. Tyree (2004), Recent projections of 21st-century climate change and watershed responses in the Sierra Nevada, USDA Forest Service 46 Gen. Tech. Rep. PSW-GTR-193.

Dettinger, M. D. (2005), From climate-change spaghetti to climate-change distributions for 21st century California, San Francisco Estuary and Watershed Science, 3(1), 14.

Jacobs, D. D. (1953), Snow Surveying, Yosemite Nature Notes, 32(1), 6.

Karl, Thomas R.; Melillo, Jerry M.; and Peterson, Thomas C. (eds.) (2009), Global Climate Change Impacts in the United States. Cambridge University Press, New York, N.Y.

Knowles, N., M. D. Dettinger, and D. R. Cayan (2006), Trends in Snowfall versus Rainfall in the Western United States, Journal of Climate, 19(18), 4545-4559.

Lundquist, J., and J. Roche (2009), Climate change and water supply in western national parks, Park Science, 26(1), 7.

Lutz, James A.; Van Wagtendonk, Jan W.; Franklin, Jerry F. (2010), Climatic Water Deficit, Tree Species Ranges, and Climate Change in Yosemite National Park, Journal of Biogeography, (doi:10.1111/j.1365-2699.2009.02268.x), 1-15.

McCabe, G., M. Clark, and L. Hay (2007), Rain-on-snow events in the western United States, Bulletin of the American Meteorological Society, 88(3), 319-328.

Merz, R., and G. Blöschl (2003), A process typology of regional floods, Water Resources Research, 39(12), 1340.

Mount, J., 1995. California Rivers and Streams: The Conflict Between Fluvial Process and Land Use. University of California Press, 376pp.

Peterson, D., R. Smith, S. Hager, D. Cayan, and M. Dettinger (2003), Air Temperature and Snowmelt Discharge Characteristics, Merced River at Happy Isles, Yosemite National Park, Central Sierra Nevada, paper presented at Pacific Climate.

Peterson, D., R. Smith, I. Stewart, N. Knowles, C. Soulard, and S. Hager (2005), Snowmelt discharge characteristics Sierra Nevada, California, Rep. 2005-5056, U.S. Department of the Interior U.S. Geological Survey, Reston, Virginia.

Stewart, I. T., D. R. Cayan, and M. D. Dettinger (2004), Changes in snowmelt runoff timing in western North America under a 'business as usual' climate change scenario, Climatic Change, 62(3-Jan), 217-232.

Stillwater Sciences (2008), The Merced River Alliance Project Final Report Rep. The Consortium for Integrated Climate Research in Western Mountains (CIRMOUNT) Committee (2006), Mapping new terrain: Climate change and America's West: Anticipating challenges to western mountain ecosystems and resources Rep., 32 pp, Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture, Albany, Calif.






Did You Know?

Low intensity fire in Yosemite

Natural fires in Yosemite are often no more than a single burning snag (standing dead tree) or a slow moving, low intensity fire that cleans underbrush from the forest floor. These fires prevent unwanted fires by removing accumulating forest debris that can fuel a larger fire in hot, dry conditions.