title: Precipitation Fluctuations over Northern Hemisphere Land Areas Since the Mid-19th Century.
abstract: 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.
authors.forename: R S
authors.initials: RS
authors.lastname: Bradley
authors.forename: H F
authors.initials: HF
authors.lastname: Diaz
authors.forename: J K
authors.initials: JK
authors.lastname: Eischeid
authors.forename: P D
authors.initials: PD
authors.lastname: Jones
authors.forename: P M
authors.initials: PM
authors.lastname: Kelly
authors.forename: C M
authors.initials: CM
authors.lastname: Goodess