Abrupt mid-Holocene onset of centennial-scale climate variability on the Peru-Chile Margin

Details Abrupt mid-Holocene onset of centennial-scale climate variability on the Peru-Chile Margin Abrupt mid-Holocene onset of centennial-scale climate variability on the Peru-Chile Margin

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3618704c&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 18, CiteID L18704

Physics

2

Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Geochemistry: Sedimentary Geochemistry, Geochemistry: Organic And Biogenic Geochemistry, Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: Paleoclimatology (0473, 4900)

Scientific paper

Understanding the natural climate variations in the eastern tropical Pacific (ETP) is crucial for predicting the evolution of the El Niño-Southern Oscillation (ENSO). Here we present the first continuous, decadal-resolution Holocene climate record from the Peru-Chile Margin, near the epicenter of the modern ENSO system. Geochemical proxies allow us to reconstruct sea surface temperature, phytoplankton productivity, and thermocline ventilation, variables that are tightly correlated to ENSO events today. Despite the observation that the mean state of all three variables did not change over the past 10,000 years, our data reveal a dramatic increase in climate variability near 5 ka; represented by prolonged periods (50-200 yrs) of climate extremes, which are absent in the early Holocene. These centennial-scale oscillations do not show typical El Niño-La Niña correlations between proxies. We therefore posit that a significant fraction of super-ENSO variance may originate outside the tropics, through processes that ventilate the ETP subsurface waters.

Affiliated with

Also associated with

No associations

Rating

Abrupt mid-Holocene onset of centennial-scale climate variability on the Peru-Chile Margin does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Abrupt mid-Holocene onset of centennial-scale climate variability on the Peru-Chile Margin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abrupt mid-Holocene onset of centennial-scale climate variability on the Peru-Chile Margin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1192142