summer temperatures

The climate of the US Southwest

Sheppard PR, Comrie AC, Packin GD, Angersbach K, Hughes MK. 2002. The climate of the US Southwest. Climate Research. 21:219-238.

Reconstructed temperature and precipitation on a millennial timescale from tree-rings in the Southern Colorado Plateau, USA

Salzer MW, Kipfmueller KF. 2005. Reconstructed temperature and precipitation on a millennial timescale from tree-rings in the Southern Colorado Plateau, USA. Climatic Change. 70:465-487.