Details

Autor(en) / Beteiligte

• Griffin, Daniel
• Woodhouse, Connie A.
• Meko, David M.
• Stahle, David W.
• Faulstich, Holly L.
• Carrillo, Carlos
• Touchan, Ramzi
• Castro, Christopher L.
• Leavitt, Steven W.

Titel

North American monsoon precipitation reconstructed from tree-ring latewood

Ist Teil von

• Geophysical research letters, 2013-03, Vol.40 (5), p.954-958

Ort / Verlag

Washington: Blackwell Publishing Ltd

Erscheinungsjahr

2013

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• The North American monsoon is a major focus of modern and paleoclimate research, but relatively little is known about interannual‐ to decadal‐scale monsoon moisture variability in the pre‐instrumental era. This study draws from a new network of subannual tree‐ring latewood width chronologies and presents a 470‐year reconstruction of monsoon (June–August) standardized precipitation for southwestern North America. Comparison with an independent reconstruction of cool‐season (October–April) standardized precipitation indicates that southwestern decadal droughts of the last five centuries were characterized not only by cool‐season precipitation deficits but also by concurrent failure of the summer monsoon. Monsoon drought events identified in the past were more severe and persistent than any of the instrumental era. The relationship between winter and summer precipitation is weak, at best, and not time stable. Years with opposing‐sign seasonal precipitation anomalies, as noted by other studies, were anomalously frequent during the mid to late 20th century. Key Points New network of tree‐ring latewood records reconstructs monsoon precipitation Monsoon failure implicated in major southwestern droughts of last 470 years Winter‐summer precipitation relationship is found to be weak and time unstable