#TEMPORAL TEMPERATURE CONVERSION MANUAL#

Climate Normals stations and the study of how such changes may influence observed climate trends. Data available from the Land Cover Trends project offer unique opportunities for identification of LULC change associated with U.S. Climate normals are derived from arithmetic means of the adjusted and quality controlled data. In addition, inhomogeneities in the data arising from changes in station location or instrumentation have been addressed. Data from the Normals stations have been adjusted for time of observation biases and undergone quality control. Historical Climatology Network represent a subset of the Normals stations. Furthermore, the active stations of the U.S. In addition to defining “normal” temperatures for stations included in the data set, the temperature data are critical to the production of several derivative data sets, including climatographies of frost/freeze probabilities and heating and cooling degrees. Climate Normals of Temperature and Precipitation is the definitive data set of climatological values of temperature and precipitation for the most recent (1971–2000) thirty-year interval. Climate Normals stations located within 10 km of Land Cover Trends Project sample blocks (plus) and the 183 of those stations for which temperature trends were computed (solid circles). showing ecoregion divisions and the 23 ecoregions used in this study (filled). The 23 (of 84) ecoregions completed by the Land Cover Trends Project thus far were used in this study ( Figure 1). Land cover then is classified as one of 11 types at a resolution of 60 m within each sample block. 20 km by 20 km sample blocks were utilized for the initial nine ecoregions analyzed, while subsequent ecoregions are being evaluated with 10 km by 10 km sample blocks to improve ecoregion representativeness.

#TEMPORAL TEMPERATURE CONVERSION MANUAL#

This analysis includes manual interpretation of Landsat satellite imagery of randomly sampled blocks in each of the 84 ecoregions originally demarcated by Omernik. Geological Survey is designed to describe the rates and types of land cover change across the United States for four time periods spanning a total of approximately 30 years. The Land Cover Trends project undertaken by the U.S. While some studies have included estimates of changes in other land cover types, these are usually regional-scale analyses due to the lack of historical land use/land cover data. Much of the research on the climatic consequences of land use/land cover (LULC) alterations has concentrated primarily on urbanization, which in many regions is not the predominant type of conversion. While the impacts of increasing amounts of greenhouse gases in the atmosphere on climate change have been the focus of numerous studies, analyses of altered land cover and land use on climate change and its detection have been limited.

Temporal temperature conversion