Search Results

You are looking at 1 - 4 of 4 items for :

  • Water budget/balance x
  • U.S. CLIVAR Drought x
  • All content x
Clear All
Renu Joseph and Ning Zeng

heating anomalies to circulation and precipitation changes) leading to evaporation change and then a change in precipitation. However, over land, the chain of response is very different. Surface temperature is a response to land surface water and energy balance and it is the total heating that directly drives moisture convergence and therefore precipitation, while evaporation is a response and feedback, as opposed to be forcing as in the ocean. This happens because of the much lower heat capacity over

Full access
Kirsten L. Findell and Thomas L. Delworth

indicator of longer-term drought. Both indices were justified in their original publications as improvements over the Palmer drought severity index (PDSI; Palmer 1965 ). The PDSI was a landmark development in drought research because it was the first water-budget-based index: it incorporated antecedent precipitation, moisture supply, and moisture demand into a hydrologic accounting system ( Heim 2002 ). It was widely adapted to regions far from its original development zone in the Great Basin of the

Full access
Bradfield Lyon

waves that often, though certainly not always, accompany them. For example, during the 1991/92 summer drought in southern Africa it is estimated that as much as 3 million tons of grain production were lost in this predominately rain-fed agricultural region ( Dilley and Heyman 1995 ). The extreme high temperatures that accompanied the drought not only contributed to the crop losses but also to widespread livestock mortality ( Sivakumar 2006 ) and stresses on regional water supplies. The joint

Full access
Scott J. Weaver, Siegfried Schubert, and Hailan Wang

. Weaver , S. J. , A. Ruiz-Barradas , and S. Nigam , 2009 : Pentad evolution of the 1988 drought and 1993 flood over the Great Plains: An NARR perspective on the atmospheric and terrestrial water balance. J. Climate , in press . Wexler , H. , 1961 : A boundary layer interpretation of the low level jet. Tellus , 13 , 368 – 378 . Fig . 1. Seasonal cycle of the GPLLJ in the NCEP (solid) and NARR (dashed) reanalyses and precipitation (dotted) in the U.S.–Mexico dataset. The GPLLJ is the

Full access