{"id":17025,"date":"2011-02-25T05:05:46","date_gmt":"2011-02-25T13:05:46","guid":{"rendered":"http:\/\/planetsave.com\/?p=17025"},"modified":"2011-02-25T05:05:46","modified_gmt":"2011-02-25T13:05:46","slug":"climate-record-suggests-longer-droughts-for-pacific-northwest","status":"publish","type":"post","link":"https:\/\/planetsave.com\/articles\/climate-record-suggests-longer-droughts-for-pacific-northwest\/","title":{"rendered":"Climate Record Suggests Longer Droughts for Pacific Northwest"},"content":{"rendered":"

Researchers led by members of the University of Pittsburgh have extracted a sediment core from the lakebed of Castor Lake in north central Washington which provides a six thousand year climate record of the region. What they have found is that the traditionally rain-soaked region of the American Pacific Northwest is not going to be seeing a wet spell like the 20th<\/sup> century anytime soon, and that the dry seasons are most likely going to be longer as well.<\/p>\n

The sediment core allowed researchers the opportunity to plot the region\u2019s drought history since around 4,000 BCE. What they found was that the wet and dry cycles during the past millennium have grown longer.<\/p>\n

This deviation is attributed to the irregular pressure and temperature changes brought on by the El Ni\u00f1o and the La Ni\u00f1a climate systems that affect the region.<\/p>\n

The researchers also reported that the wet cycle that stretches from the 1940s to the beginning of the next century was the dampest in the record in 350 years.<\/p>\n

Lead researcher, Mark Abbot of the University of Pittsburgh, where he is a professor of geology and planetary science, says that these unusually wet years coincide with the introduction of water-use policies.<\/p>\n

\u201cWestern states happened to build dams and water systems during a period that was unusually wet compared to the past 6,000 years,\u201d he said. \u201cNow the cycle has changed and is trending drier, which is actually normal. It will shift back to wet eventually, but probably not to the extremes seen during most of the 20th century.\u201d<\/p>\n

The Findings<\/h2>\n

The analysis of the sediment core showed that the climate of the Pacific Northwest fluctuated relatively evenly between wet and dry periods for thousands of years. They found that;<\/p>\n