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Solar forcing of Holocene climate; new insights from a speleothem record, Southwestern United States

Yemane Asmerom, Victor Polyak, Stephen Burns and Jessica Rassmussen
Solar forcing of Holocene climate; new insights from a speleothem record, Southwestern United States
Geology (Boulder) (January 2007) 35 (1): 1-4

Abstract

Holocene climate change has likely had a profound influence on ecosystems and culture. A link between solar forcing and Holocene climate, such as the Asian monsoon, has been shown for some regions, although no mechanism for this relationship has been suggested. Here we present the first high-resolution complete Holocene climate record for the North American monsoon region of the southwestern United States (southwest) in order to address the nature and causes of Holocene climate change. We show that periods of increased solar radiation correlate with decreased rainfall, the opposite to that observed in the Asian monsoon, and suggest that a solar link to Holocene climate is through changes in the Walker circulation and the Pacific Decadal Oscillation and El Nino-Southern Oscillation systems of the tropical Pacific Ocean. Given the link between increased warming and aridity in the southwest, additional warming due to greenhouse forcing could potentially lead to persistent hyperarid conditions, similar to those seen in our record during periods of high solar activity.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 35
Serial Issue: 1
Title: Solar forcing of Holocene climate; new insights from a speleothem record, Southwestern United States
Affiliation: University of New Mexico, Department of Earth & Planetary Sciences, Albuquerque, NM, United States
Pages: 1-4
Published: 200701
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 34
Accession Number: 2007-011007
Categories: Quaternary geologyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2007010
Illustration Description: illus. incl. sketch map
N32°00'00" - N33°22'60", W106°22'60" - W104°52'00"
Secondary Affiliation: University of Massachusetts, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200707
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