Simulated impacts of El Nino/Southern Oscillation on United States water resources Academic Article uri icon

abstract

  • The El Nio/Southern Oscillation (ENSO) phenomena alter global weather patterns with consequences for fresh water supply. ENSO events impact regions and their natural resource sectors around the globe. For example, in 1997 and 1998, a strong El Nio brought warm ocean temperatures, flooding, and record snowfall to the west coast of the United States. Research on ENSO events has improved long range climate predictions, affording the potential to reduce the damage and economic cost of these weather patterns. Here, using the Hydrologic Unit Model for the United States (HUMUS), we simulate the impacts of four types of ENSO states (Neutral, El Nio, La Nia, and strong El Nio) on water resources in the conterminous United States. The simulations show that La Nia conditions increase water yield across much of the country. We find that water yield increases during El Nio years across the south while declining in much of the rest of the country. However, under strong El Nio conditions, regional water yields are much higher than Neutral, especially along the West Coast. Strong El Nio is not simply an amplification of El Nio; it leads to strikingly different patterns of water resource response.

published proceedings

  • JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION

author list (cited authors)

  • Thomson, A. M., Brown, R. A., Rosenberg, N. J., Izaurralde, R. C., Legler, D. M., & Srinivasan, R.

citation count

  • 22

complete list of authors

  • Thomson, AM||Brown, RA||Rosenberg, NJ||Izaurralde, RC||Legler, DM||Srinivasan, R

publication date

  • February 2003

publisher