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GLOBAL BIOGEOCHEMICAL CYCLES,
VOL. 7, NO. 1,
PP. 81-95, 1993
doi:10.1029/92GB02533
Detecting the aerial fertilization effect of atmospheric CO2 enrichment in tree-ring chronologies
Laboratory of Tree-Ring Research, University of Arizona, Tucson
U.S. Water Conservation Laboratory, Agricultural Research Service, Phoenix, Arizona
The growth-promoting effects of the historical increase in the air's CO2 content are not yet evident in tree-ring records where yearly biomass additions are apportioned among all plant parts. When almost all new biomass goes into cambial enlargement, however, a growth increase of 60% or more is observed over the past two centuries. As a result, calibration of tree-ring records of this nature with instrumental climate records may not be feasible because of such growth changes. However, climate signals prior to about the mid-19th century may yet be discovered by calibrating such tree-ring series with independently derived proxy climate records for those times.
Received 23 June 1992; accepted 22 October 1992; .
Citation: (1993), Detecting the aerial fertilization effect of atmospheric CO2 enrichment in tree-ring chronologies, Global Biogeochem. Cycles, 7(1), 81–95, doi:10.1029/92GB02533.
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