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Procedures that may be used to evaluate the operational performance of a wide spectrum of geophysi-cal models are introduced. Primarily using a complementary set of difference measures, both model accuracy and precision can be meaningfully estimated, regardless of whether the model predictions are manifested as scalars, directions, or vectors. It is(More)
Harmonic analysis of a one-year time series (26 periods) of NOAA AVHRR NDVI biweekly composite data was used to characterize seasonal changes for natural and agricultural land uselland cover in Finney County in southwest Kansas. Different crops (corn, soybeans, alfalfa) exhibit distinctive seasonal patterns of NDVI variation that have strong periodic(More)
that may be the first to exhibit signs of environmental degrada-Abstract tion. An index of interannual variability for natural and man-The southern Great Plains may be one of the first areas in the aged LULC types was developed using phase components United States to show significant and detectable changes in derived from harmonic analysis of a nine-year(More)
[1] Several quantitative estimates of surface instrumental temperature trends in the late 20th century are compared by using published results and our independent analyses. These estimates highlight a significant sensitivity to the method of analysis, the treatment of data, and the choice of data presentation (i.e., size of the smoothing filter window).(More)
Agnotology has been defined in a variety of ways including ''the study of ignorance and its cultural production'' and ''the study of how and why ignorance or misunderstanding exists.'' More recently, however, it has been posited that agnotology should be used in the teaching of climate change science. But rather than use agno-tology to enhance an(More)
Land cover changes and their biogeophysical effects on climate" (2014). ABSTRACT: Land cover changes (LCCs) play an important role in the climate system. Research over recent decades highlights the impacts of these changes on atmospheric temperature, humidity, cloud cover, circulation, and precipitation. These impacts range from the local-and regional-scale(More)
uman activities have modified the environment for thousands of years. Significant population increase, migration, and accelerated socioeconomic activities have intensified these environmental changes over the last several centuries. The climate impacts of these changes have been found in local, regional, and global trends in modern atmospheric temperature(More)
The 1000-year climatic and environmental history of the Earth contained in various proxy records is examined. As indicators, the proxies duly represent or record aspects of local climate. Questions on the relevance and validity of the locality paradigm for climatological research become sharper as studies of climatic changes on timescales of 50–100 years or(More)
Keywords: Total solar irradiance variability Equator-to-Pole temperature gradient Climate dynamics Multi-decadal timescales a b s t r a c t Using thermometer-based air temperature records for the period 1850–2010, we present empirical evidence for a direct relationship between total solar irradiance (TSI) and the Equator-to-Pole (Arctic) surface temperature(More)
Agnotology is the study of how ignorance arises via circulation of misinfor-mation calculated to mislead. Legates et al. asserted that fossil-fuel interests had promoted doubt about a climate consensus. Their definition of climate 'misinformation' was contingent upon the post-modernist assumptions that scientific truth is discernible by measuring a(More)