Convection Plumes from Ulmus americana L

Science  16 Apr 1965:
Vol. 148, Issue 3668, pp. 392-393
DOI: 10.1126/science.148.3668.392


An unusual example of convection was recently seen above large elm trees shortly after sunset. The condensation of transpirational moisture in air that was cooler than that within the tree crowns is believed to account for the readily visible convective motion above the trees.