|
David Russell Legates is a Professor of Geography〔Faculty page at (UDel Geography Department ) (accessed 6/27/2009)〕 at the University of Delaware. He is the former Director of the Center for Climatic Research at the same university,〔David R. Legates is an adjunct scholar with the National Center for Policy Analysis and an associate professor and director of the Center for Climatic Research at the University of Delaware. (Global Warming Smear Targets ), by David R. Legates, ''Washington Times'', 2003-08-25〕 〔Legates is the Delaware State Climatologist, Coordinator of the Delaware Geographic Alliance (sponsored by National Geographic), and Associate Director of the Delaware Space Grant Consortium (sponsored by NASA)." (Climate Science: Climate Change and Its Impact - About the Author )〕 and a former Delaware State Climatologist.〔(Delaware state climatologist David Legates resigns ), ABC27 WHTM TV station, Harrisburg, York, Lancaster, and Lebanon, PA (accessed 7-25-2011)〕 Legates has published research papers, opinion editorials, and spoken openly in opposition to the consensus scientific opinion on climate change. More recently, he has been known for his skepticism toward the anthropogenic cause of the observed global warming patterns and the severity of its consequences at the local geographical scale. Legates viewpoint, as stated in a 2015 study that he co-authored, is that the Earth will experience about 1.0 C warming over the 2000 to 2100 period.〔 ==Scientific work== Legates started his career working on precipitation probability modeling. He extended his research to the study of global precipitation and temperature measurement correlation and performed critical analyses of the quality of traditional water budgeting methods applied to recent, better quality measurement data. He also became concerned with the study of the applicability of global circulation prognostication models at the regional and local level. Legates and his team argued for the necessity of technological progress in precipitation measurement used for validating climate change scenarios, and for validation of existing data used for that purpose. They demonstrated disagreement between satellite-based and in-situ precipitation measurements, and pointed out inconsistencies among satellite data processing algorithms. Legates argued for a better adequacy of observation-based climatologies compared to those compiled subjectively. His team concluded that uncorrected centered-pattern correlation statistics applied to the validation of general circulation prognostication models used to predict large-scale climate change may be inappropriate and may yield erroneous results. They proposed modified goodness of fit test methods more suitable for use in hydrologic and hydroclimate model validation. Legates and his coworkers became concerned with the quality of surface instrumental temperature data analysis, treatment and presentation of trends used in the communication of global warming research results. He co-developed methods to correct biases in gauge-measured precipitation data for wind and temperature effects, with direct applicability in climate change, hydrology and environmental impact studies. His group observed that gauge undercatch was mostly caused by wind turbulence—especially for snow—and has a significant effect on the calculated Arctic water budget. They also studied the correlation between the observed variability in Western US snowpack accumulation and atmospheric circulation in historical measurement data and developed temperature-snowfall correlations based on first principles and observation in order to improve the global radiation balance estimation used in climate change predictions. Legates also developed a calibration method which validates NEXRAD radar precipitation data with gauge measurements to improve the accuracy of precipitation estimates. Legates and his coworkers extended their research to the development of correlations between satellite crop imaging data and landscape change, crop type and its evolution, and their effects of global climate change. They have also tackled rainfed crop management, modeling and optimization. The group developed a hydrologic model based on meteorological, soil and vegetation measurement data. His groups has demonstrated poor quality of correlation between hydrological cycle data, global runoff and global warming. Legates and coauthors (among which were Willie Soon, Sallie Baliunas, Timothy F. Ball and others) authored a controversial (and non peer-reviewed) paper in the journal ''Ecological Complexity'' attempting to disprove an increase in Hudson Bay temperatures in the past 70 years, and cautioning about polar bear-human interaction as a likely cause for any observed decline in bear populations. In this paper the authors expressed doubts regarding the predictive quality of global warming models at the entire Arctic scale and any extrapolation of polar bear population trends. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「David Legates」の詳細全文を読む スポンサード リンク
|