NOAA's 1981-2010 U.S. Climate Normals: An Overview
Arguez, Anthony ; Durre, Imke ; Applequist, Scott ; Vose, Russell S. ; Squires, Michael F. ; Yin, Xungang ; Heim, Richard R. (Jr.) ; Owen, Timothy W.
The National Oceanic and Atmospheric Administration (NOAA) released the 1981-2010 U.S. Climate Normals in July 2011, representing the latest decadal installment of this long-standing product line. Climatic averages (and other statistics) of temperature, precipitation, snowfall, and numerous derived quantities were calculated for ~9,800 stations operated by the U.S. National Weather Service (NWS). They include estimated normals, or "quasi normals," for approximately 2,000 active short-record stations such as those in the U.S. Climate Reference Network. The 1981-2010 installment features several new products and methodological enhancements: 1) state-of-the-art temperature homogenization at the monthly scale, 2) extensive utilization of quality-controlled daily climate data, 3) new statistical approaches for calculating daily temperature normals and heating and cooling degree days, and 4) a comprehensive suite of precipitation, snowfall, and snow depth statistics. This paper provides a general overview of this new suite of climate normals products.
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