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The climate velocity of the contiguous United States during the 20th century

New research by professor Solomon Dobrowski and several co-authors assesses the climate velocity (both climate displacement rate and direction) for minimum temperature, actual evapotranspiration, and climatic water deficit over the contiguous US during the 20th century (1916–2005). Those three features are important limiting factors in vegetation growth and address the need to examine whether species can adapt or move as quickly as climate changes occur. 

Their results suggest that many factors in addition to temperature drive species range shifts and that these factors vary regionally, show variable and opposing directions among the variables considered, and shift direction through time. Dobrowski and colleagues from the University of Idaho, the University of Illinois, the USFS Region 1, and USFS Rocky Mountain Research Station state that this complex variability of factors may help explain unexpected or conflicting observational evidence of climate-driven species range shifts during the 20th century.