Table 3.

Sign of Significant Correlation Between Meteorological and Phenological Variables on Annual NEE, GPP, and Derived GPP and R _eco Parameters Across All Sites

	NEE	GPP	R eco	A max	R d	ɑ	R 10	Q 10
VPD								+
VPDGS		+
VPDNGS			+
T air			+
T airGS			–	+	+
T airNGS	+						–
TAGS	+
TANGS
RainGS
RainNGS	+						+	+
SnowNGS					+
GSlength				+	+		+
CO2				+	+		+
Site	*	*	*	*	*	*	*	*

Note. Both annual and seasonal (GS = growing season, NGS = non‐growing season) drivers are compared to annual variation in CO₂ (NEE), gross primary productivity (GPP), ecosystem respiration (R _eco), maximum photosynthetic capacity (A _max), dark respiration (R _d ), quantum yield (ɑ), R ₁₀, and temperature sensitivity (Q ₁₀). Plus signs indicate a positive relationship, and negative sign the opposite, the asterisk (*) indicates a significant difference in strength of relationship by site and empty cells indicate no significant change across all sites. Green colors denote significant trends at the 95% level.