The impact of hurricanes on sedimenting particulate matter in the semi-arid Bahía de La Paz, Gulf of California

Silverberg, Norman; Choumiline, Evgueni; Bahena, Fernando Aguirre; Rodríguez-Castañeda, A. P.; Sapozhnikov, Dmitry

doi:10.1016/j.csr.2008.02.004

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Extreme precipitation during passage of tropical systems can also result in runoff/extreme flooding [Galewsky et al, 2006;Silverberg et al, 2007]; however, instrumental observations from Bora Bora (Figures 2a and 2b) show that storms also commonly produce little change in rainfall near our site. For example, precipitation for November 1997 C.E.…”

Section: Proxy Developmentmentioning

confidence: 82%

South Pacific hydrologic and cyclone variability during the last 3000 years

2016

View full text Add to dashboard Cite

Major excursions in the position of the South Pacific Convergence Zone (SPCZ) and/or changes in its intensity are thought to drive tropical cyclone (TC) and precipitation variability across much of the central South Pacific. A lack of conventional sites typically used for multimillennial proxy reconstructions has limited efforts to extend observational rainfall/TC data sets and our ability to fully assess the risks posed to central Pacific islands by future changes in fresh water availability or the frequency of storm landfalls. Here we use the sedimentary record of Apu Bay, offshore the island of Tahaa, French Polynesia, to explore the relationship between SPCZ position/intensity and tropical cyclone overwash, resolved at decadal time scales, since 3200 years B.P. Changes in orbital precession and Pacific sea surface temperatures best explain evidence for a coordinated pattern of rainfall variability at Tahaa and across the Pacific over the late Holocene. Our companion record of tropical cyclone activity from Tahaa suggests major storm activity was higher between 2600-1500 years B.P., when decadal scale SPCZ variability may also have been stronger. A transition to lower storm frequency and a shift or expansion of the SPCZ toward French Polynesia around 1000 years B.P. may have prompted Polynesian migration into the central Pacific.

show abstract

Section: Proxy Developmentmentioning

confidence: 82%