Precipitation Fluctuations over Northern Hemisphere Land Areas Since the Mid-19th Century.
An extensive array of measurements extending back to the mid-19th century was used to investigate large-scale changes in precipitation over Northern Hemisphere land areas. Significant increases in mid-latitude precipitation and concurrent decreases in low-latitude precipitation have occurred over the last 30 to 40 years. Although these large-scale trends are consistent with general circulation model projections of precipitation changes associated with doubled concentrations of atmospheric carbon dioxide, they should be viewed as defining large-scale natural climatic variability. Additional work to refine regional variations and address potential network inhomogeneitics is needed. This study attempts to show secular precipitation fluctuations over hemispheric and continental-scale areas of the Northern Hemisphere.
Bradley
R S
RS
Diaz
H F
HF
Eischeid
J K
JK
Jones
P D
PD
Kelly
P M
PM
Goodess
C M
CM