TY  - JOUR
A1  - Lechleitner, Franziska A.
A1  - Breitenbach, Sebastian Franz Martin
A1  - Rehfeld, Kira
A1  - Ridley, Harriet E.
A1  - Asmerom, Yemane
A1  - Prufer, Keith M.
A1  - Marwan, Norbert
A1  - Goswami, Bedartha
A1  - Kennett, Douglas J.
A1  - Aquino, Valorie V.
A1  - Polyak, Victor
A1  - Haug, Gerald H.
A1  - Eglinton, Timothy I.
A1  - Baldini, James U. L.
T1  - Tropical rainfall over the last two millennia: evidence for a low-latitude hydrologic seesaw
JF  - Scientific reports
N2  - The presence of a low-to mid-latitude interhemispheric hydrologic seesaw is apparent over orbital and glacial-interglacial timescales, but its existence over the most recent past remains unclear. Here we investigate, based on climate proxy reconstructions from both hemispheres, the inter-hemispherical phasing of the Intertropical Convergence Zone (ITCZ) and the low-to mid-latitude teleconnections in the Northern Hemisphere over the past 2000 years. A clear feature is a persistent southward shift of the ITCZ during the Little Ice Age until the beginning of the 19th Century. Strong covariation between our new composite ITCZ-stack and North Atlantic Oscillation (NAO) records reveals a tight coupling between these two synoptic weather and climate phenomena over decadal-to-centennial timescales. This relationship becomes most apparent when comparing two precisely dated, high-resolution paleorainfall records from Belize and Scotland, indicating that the low-to mid-latitude teleconnection was also active over annual-decadal timescales. It is likely a combination of external forcing, i.e., solar and volcanic, and internal feedbacks, that drives the synchronous ITCZ and NAO shifts via energy flux perturbations in the tropics.
Y1  - 2017
U6  - https://doi.org/10.1038/srep45809
SN  - 2045-2322
VL  - 7
PB  - Nature Publ. Group
CY  - London
ER  -