Atmosphere–ocean dynamics in the Western Indian Ocean recorded in corals

Zinke, Jens; Pfeiffer, Miriam; Timm, O. Elison; Dullo, Wolf‐Christian; Davies, Gareth R.

doi:10.1098/rsta.2004.1482

Cited by 33 publications

(20 citation statements)

References 65 publications

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“…However, correlation between ENSO and climate variability in the Indian Ocean is not always high [Zinke et al, 2005]. Recently, the Indian Ocean Dipole (IOD) was discovered, which has similar east -west anomalies and periodicities in the Indian Ocean as those produced by ENSO in the Pacific Ocean.…”

Section: Introductionmentioning

confidence: 99%

Indian Ocean Dipole index recorded in Kenyan coral annual density bands

Iijima

Nakamura

McClanahan³

et al. 2006

Geophysical Research Letters

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The Indian Ocean Dipole (IOD), which governs climate variability not only over the Indian Ocean but also globally, produces precipitation anomalies in the East African short rain period from October to November. These precipitation anomalies were recorded in annual bands from a coral core obtained in the Malindi Marine Park, Kenya. A signature of the IOD in precipitation was detected in the coral core by luminescence intensity under UV light and by oxygen isotope values dated to January, a few months after the short rain period. Anomalies of the oxygen isotope values correlated well with high and low precipitation, which were related to positive and negative IOD indices, respectively. This study suggests that the coral annual band record is effective for reconstructing IOD events and should be able to reconstruct the IOD record prior to instrumental observations.

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Section: Introductionmentioning

confidence: 99%

Indian Ocean Dipole index recorded in Kenyan coral annual density bands

Iijima

Nakamura

McClanahan³

et al. 2006

Geophysical Research Letters

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“…These SST data are useful in setting up experiments at the appropriate periods and to interpret the biology of the organisms at individual or population levels. They will also contribute to the understanding of reef functioning, the metabolism of the different reef components and also paleoenvironments from the geochemical composition of coral skeletons combined with salinity records (Zinke et al 2004(Zinke et al , 2005.…”

Section: Coral Bleaching Eventsmentioning

confidence: 99%

A Ten-year Period of Daily Sea Surface Temperature at a Coastal Station in Reunion Island, Indian Ocean (July 1993 – April 2004): Patterns of Variability and Biological Responses

Conand¹,

Marsac²,

Tessier³

et al. 2009

West Ind. Oc. J Mar. Sci.

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Abstract-Sea surface temperature (SST) was recorded hourly by an automatic data recorder in Reunion Island, at Pointe des Galets (21°55 S, 55°17 E) during [1993][1994][1995][1996][1997][1998][1999][2000][2001][2002][2003][2004]. The data logger was installed on a beacon located at the port entrance exposed to the open sea. The SST measurements associated with auxiliary environmental data, such as wind stress, depict the main patterns of variability at various timescales for the marine climate of Reunion Island. The 'ten-year' annual mean temperature is 25.7°C and the annual amplitude is 4.6°C. The highest monthly means are observed in February and March (28.0°C) and the lowest occur in September (23.4°C). The daily variation ranges from 0.25 to 0.74°C according to the season. In summer, the tropical cyclones are the major cause of short term variability, with sudden drops of SST than can exceed 2°C within a few hours. The annual cycle of SST is closely associated with that of wind stress, with a lagged response of about 2 months of SST to wind forcing. Throughout the 'ten-year period' covered by our dataset, the coldest years were 1993 and 2000, and the warmest were 2003 and 2004. A trend of increasing SST is suggested for the two major seasons, with a magnitude of 0.088°C/yr in summer and 0.052°C/yr in winter. Finally, the SST trend and variability depicted at our sampling site is shown to reflect the SST patterns of the whole south tropical Indian Ocean. Biological responses to SST variability are shown by coral bleaching events and the local tuna fishery. The major coral bleaching events recorded in Reunion in 1998Reunion in , 2001Reunion in , 2003Reunion in and 2004 occurred during episodes of intense and sustained anomalous high temperatures. The catch per unit effort (CPUE) of the local pelagic fishery was negatively correlated to SST anomalies with a decreasing trend of CPUE observed over the years, accompanied by an overall increase of SST. The SST observations made in Reunion Island, in a largely unsampled region of the Indian Ocean, show their relevance at a larger regional scale and their usefulness in monitoring changes of some biological components of the marine ecosystem. These examples highlight the need to maintain networks of automatic loggers worldwide at coastal stations.

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“…Inf. Tab 1; Zinke et al 2005). The average growth rate of the corals sampled varied between 9 and 16 mm per year (Zinke et al 2005).…”

Section: Coral Datamentioning

confidence: 99%

“…Tab 1; Zinke et al 2005). The average growth rate of the corals sampled varied between 9 and 16 mm per year (Zinke et al 2005). Thus, the 1 or 2 mm sample spacing provides approximately monthly or bimonthly resolution, respectively.…”

Section: Coral Datamentioning

confidence: 99%

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Western Indian Ocean marine and terrestrial records of climate variability: a review and new concepts on land–ocean interactions since AD 1660

Zinke

Pfeiffer

Timm

et al. 2008

Int J Earth Sci (Geol Rundsch)

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We examine the relationship between three tropical and two subtropical western Indian Ocean coral oxygen isotope time series to surface air temperatures (SAT) and rainfall over India, tropical East Africa and southeast Africa. We review established relationships, provide new concepts with regard to distinct rainfall seasons, and mean annual temperatures. Tropical corals are coherent with SAT over western India and East Africa at interannual and multidecadal periodicities. The subtropical corals correlate with Southeast African SAT at periodicities of 16-30 years. The relationship between the coral records and land rainfall is more complex. Running correlations suggest varying strength of interannual teleconnections between the tropical coral oxygen isotope records and rainfall over equatorial East Africa. The relationship with rainfall over India changed in the 1970s. The subtropical oxygen isotope records are coherent with South African rainfall at interdecadal periodicities. Paleoclimatological reconstructions of land rainfall and SAT reveal that the inferred relationships generally hold during the last 350 years. Thus, the Indian Ocean corals prove invaluable for investigating land-ocean interactions during past centuries.

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Atmosphere–ocean dynamics in the Western Indian Ocean recorded in corals

Cited by 33 publications

References 65 publications

Indian Ocean Dipole index recorded in Kenyan coral annual density bands

Indian Ocean Dipole index recorded in Kenyan coral annual density bands

A Ten-year Period of Daily Sea Surface Temperature at a Coastal Station in Reunion Island, Indian Ocean (July 1993 – April 2004): Patterns of Variability and Biological Responses

Western Indian Ocean marine and terrestrial records of climate variability: a review and new concepts on land–ocean interactions since AD 1660

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