Abstract
AbstractThis article examines the effects of ocean-related decadal climate variability (DCV) phenomena on climate and the effects of both climate shifts and independent DCV events on crop yields. We address three DCV phenomena: the Pacific Decadal Oscillation (PDO), the Tropical Atlantic Sea-Surface Temperature Gradient (TAG), and the Western Pacific Warm Pool (WPWP). We estimate the joint effect of these DCV phenomena on the mean, variance, and skewness of crop yield distributions. We found regionally differentiated impacts of DCV phenomena on growing degree days, precipitation, and extreme weather events, which in turn alter distributions of U.S. regional crop yields.
Highlights
Ocean-related phenomena have been found to influence climatic conditions over land, and in turn crop yields
The findings suggest that the decadal climate variability (DCV) phenomena influence climate, and that this subsequently influences crop yields across the United States
This study investigates how combinations of DCV phenomena affect climate and crop yields across the United States
Summary
Ocean-related phenomena have been found to influence climatic conditions over land, and in turn crop yields. Many ocean-related studies have been carried out, there are much less studied, longer-term ocean-related phenomena that influence crop These phenomena are defined by general, persistent heat levels in regions of the ocean, which, in turn, affect climate over land. These phenomena alter the air currents and weather system movement across the country, in turn influencing temperature and rainfall patterns. The null hypothesis addressed in this study is that DCV phenomena do not affect U.S regional climate and crop yields. The alternative hypothesis is that DCV phenomena do alter climate and crop yields differentially across regions
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