Geophysical Research Letters Supporting Information for Projected changes in extreme temperature events based on the NARCCAP model suite Radley M. Horton1, 2, Ethan D. Coffel2, 3, Jonathan M. Winter4, Daniel A. Bader1, 2 1Center for Climate Systems Research, Columbia University, New York, NY, 10025 2NASA 3Department 4Department Goddard Institute for Space Studies, New York, NY 10025 of Earth and Environmental Sciences, Columbia University, New York, NY, 10027 of Geography, Department of Earth Sciences, Dartmouth College, Hanover, NH, 03755 Contents of this file Figures S1 and S2 Introduction In both the Northeast and the Southwest United States we analyzed the vertical temperature gradient in NARR and the NARCCAP ensemble (crcm/ccsm, crcm/cgcm3, hrm3/gfdl, hrm3/hadcm3, and mm5i/ccsm), for seasonal mean conditions, and as extreme event composites. The results are shown in Figure 1 and 2 below. 1 Figure S1. (a): NARRCAP (dotted) and NARR (solid) summer temperature profile on mean (blue) and annual (red) maximum temperature days in the Northeast. (b): Projected change in NARCCAP summer temperature profile on mean (blue) and annual (red) maximum temperature days (c): same as (a) but for winter mean and annual minimum temperature days. (d): same as (b) but for winter mean and annual minimum temperature days. 2 Figure S2. (a): NARRCAP (dotted) and NARR (solid) summer temperature profile on mean (blue) and annual (red) maximum temperature days in the Southwest. (b): Projected change in NARCCAP summer temperature profile on mean (blue) and annual (red) maximum temperature days (c): same as (a) but for winter mean and annual minimum temperature days. (d): same as (b) but for winter mean and annual minimum temperature days. 3