Drought over the past century in Texas and New Mexico: reducing inhomogeneities in long-term climate records via statistical methods to study drought

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Title: Drought over the past century in Texas and New Mexico: reducing inhomogeneities in long-term climate records via statistical methods to study drought
Author: McRoberts, Douglas Brent
Abstract: This research looks at the past century of Texas and New Mexico climate in order to create datasets sufficient for documenting climatic variations . Inhomogeneities in climate records are defined as variations in climatic records caused by factors other than weather and climate . While there are indirect methodologies for inferring climate records such as tree rings and ice cores , it is the instrumental network that constitutes the most spatially and temporally complete record of land surface climate since the onset of the Industrial Revolution . A statistical method by Sun and Peterson (2005a ) called Inverse Weighting of Square Distance (IWSD ) will be used to reduce the inhomogeneities in climate records . The National Weather Service Cooperative Observer Program (COOP ) network of stations will be used for this analysis . A subset of the extensive COOP network , called the United States Historical Climate Network (USHCN ) , will be used as a foundation for this study . The analysis and resulting datasets from this climatic study show precipitation trends and periods of drought and will be useful for decisions regarding future policies on drought . The result of the interpolation process was the creation of several COOP and USHCN datasets . Several of the datasets were investigated to determine the spatial characteristics of precipitation over the 20th century in Texas and New Mexico . The datasets are in good agreement that the most severe drought period of the 20th century in Texas and New Mexico was in the 1950s . The frequency of pluvial periods was higher toward the end of the 20th century , with most USHCN stations showing an increasing trend when a linear regression analysis was done on each station's precipitation data .
URI: http : / /hdl .handle .net /1969 .1 /85898
Date: 2008-10-10

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Drought over the past century in Texas and New Mexico: reducing inhomogeneities in long-term climate records via statistical methods to study drought. Available electronically from http : / /hdl .handle .net /1969 .1 /85898 .

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