Drought response of upland oak (Quercus L.) species in Appalachian hardwood forests of the southeastern USA

Table 1 Mean Palmer Drought Severity Index values during the months of May, June, and July (PDSIMJJ) during the 2 years preceding a drought (PDSIMJJ_pre), during the drought (PDSIMJJ_drought), and during the 2 years post-drought (PDSIMJJ_post)

Location	Pre-drought years	PDSIMJJ_pre	Drought years	PDSIMJJ_drought	Post-drought years	PDSIMJJ_post
	Drought 1
Georgia	1984–1985	1.17	1986–1988	−3.52	1989–1990	2.10
North Carolina	1983–1984	1.28	1985–1988	−3.34	1989–1990	2.03
Tennessee	1983–1984	0.75	1985–1988	−3.59	1989–1990	2.29
Virginia	1984–1985	−0.34	1986–1988	−2.68	1989–1990	1.04
	Drought 2
Georgia	2004–2005	1.02	2006–2008	−3.52	2009–2010	−1.23
North Carolina	2004–2005	0.85	2006–2008	−3.12	2009–2010	−0.12
Tennessee	2005–2006	−0.44	2007–2008	−3.70	2009–2010	−0.07
Virginia	2005–2006	−0.02	2007–2008	−2.67	2009–2010	0.19

ISSN: 1297-966X