Evidence for Indonesian Throughflow slowdown during Heinrich events 3–5

Zuraida, Rina; Holbourn, Ann; Nürnberg, Dirk; Kuhnt, Wolfgang; Dürkop, Anke; Erichsen, Anders

doi:10.1029/2008pa001653

Cited by 42 publications

(30 citation statements)

References 67 publications

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“…The rationale of these authors was that equation (1) is based on non-symbiotic species of cultured planktonic foraminifera, but it was actually derived from symbiont-bearing Orbulina universa. Nonetheless, equation (1) is considered most appropriate (Bemis et al 1998) and has been applied to Pleistocene paleoceanographic analyses using non-symbiotic planktonic taxa (e.g., Zuraida et al 2009). (Fig.…”

Section: Methodsmentioning

confidence: 99%

Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary

Ando¹,

Huber²,

MacLeod³

2010

Paleobiology

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Abstract.-New mid-Cretaceous stable isotope (d 18 O and d 13 C) records of multiple planktonic foraminiferal species and coexisting coccoliths from Blake Nose (western North Atlantic) document a major depth-ecology reorganization of planktonic foraminifera. Across the Albian/Cenomanian boundary, deep-dwelling Praeglobotruncana stephani and Rotalipora globotruncanoides adapted to living at a shallower depth, while, at the same time, the population of surface-dwelling Paracostellagerina libyca declined. Subsequently, the opportunistic species Hedbergella delrioensis shifted to a deep environment, and the deep-dwelling forms Rotalipora montsalvensis and Rotalipora reicheli first appeared. The primary paleoenvironmental cause of the observed changes in planktonic adaptive strategies is uncertain, yet their coincidence with an earliest Cenomanian cooling trend reported elsewhere implicates the importance of reduced upper-ocean stratification. Although there has been an implicit assumption that the species-specific depth habitats of fossil planktonic foraminifera were invariant through time, planktonic paleoecology is a potential variable. Accordingly, the possibility of evolutionary changes in planktonic foraminiferal depth ecology should be a primary consideration (along with other environmental parameters) in paleoceanographic interpretations of foraminiferal stable isotope data.

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Section: Methodsmentioning

confidence: 99%

Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary

Ando¹,

Huber²,

MacLeod³

2010

Paleobiology

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“…This improvement in age models is particularly critical with respect to the sequences of events during fast transient climate reorganizations. In fact, previous studies have shown that many past major climate changes involved abrupt responses (e.g., de Menocal et al, 2000;Genty et al, 2006;Carlson et al, 2007;Zuraida et al, 2009;Clark et al, 2012;Rach et al, 2014) as well as short delays between different proxy records and regions, like the vigorously debated date and triggering of the onset of Termination I (Schaeffer, 2006;Stott et al, 2007;Koutavas and Sachs, 2008;Smith et al, 2008;Bromley et al, 2009;Clark et al, 2009;Shakun et al, 2012;Parrenin et al, 2013). In this context of successive rapid climatic events, and keeping in mind the growing interest on transient climate simulations, it thus becomes necessary to have a large amount of precisely dated and well-defined records.…”

Section: Conclusion Recommendations and Perspectivesmentioning

confidence: 99%

Water and carbon stable isotope records from natural archives: a new database and interactive online platform for data browsing, visualizing and downloading

et al. 2016

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Abstract. Past climate is an important benchmark to assess the ability of climate models to simulate key processes and feedbacks. Numerous proxy records exist for stable isotopes of water and/or carbon, which are also implemented inside the components of a growing number of Earth system model. Model-data comparisons can help to constrain the uncertainties associated with transfer functions. This motivates the need of producing a comprehensive compilation of different proxy sources. We have put together a global database of proxy records of oxygen (δ 18 O), hydrogen (δD) and carbon (δ 13 C) stable isotopes from different archives: ocean and lake sediments, corals, ice cores, speleothems and tree-ring cellulose. Source records were obtained from the georeferenced open access PANGAEA and NOAA libraries, complemented by additional data obtained from a literature survey. About 3000 source records were screened for chronological information and temporal resolution of proxy records. Altogether, this database consists of hundreds of dated δ 18 O, δ 13 C and δD records in a standardized simple text format, complemented with a metadata Excel catalog. A quality control flag was implemented to describe age markers and inform on chronological uncertainty. This compilation effort highlights the need to homogenize and structure the format of datasets and chronological information as well as enhance the distribution of published datasets that are currently highly fragmented and scattered. We also provide an online portal based on the records included in this database with an intuitive and interactive platform (http://climateproxiesfinder.ipsl.fr/), allowing one to easily select, visualize and download subsets of the homogeneously formatted records that constitute this database, following a choice of search criteria, and to upload new datasets. In the last part, we illustrate the type of application allowed by our database by comparing several key periods highly investigated by the paleoclimate community.

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“…Numerous lines of evidence, including data from plankton tows [Fairbanks et aL, 1982], sediment traps Mohtadi et aL, 2009], and coretops Sadekov et al, 2009;Xu et aL, 2006;Zuraida et aL., 2009], suggest that within the modern tropics, P. obliquiloculata has an upper thermocline depth habitat. Our data are consistent with these studies.…”

Section: Geochemistry Of P Obliquiloculata As a Thermocline Indicatormentioning

confidence: 99%

The centennial and millennial variability of the IndoPacific Warm Pool and the Indonesian Throughflow

Gibbons¹

2012

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(Short version)As the only low-latitude connection between ocean basins, the Indonesian Throughflow allows the direct transmission of heat and salinity between the Pacific and Indian Oceans. The Mg/Ca and 6180 of calcite of Globigerinoides ruber (G. ruber) were used to estimate the sea surface temperature (SST) and 6180 of water, an indicator of hydrologic conditions, over the past 20,000 years. I also attempted to estimate thermocline structure using Pulleniatina obliquiloculata, but the Mg/Ca and 6180 of calcite data yield conflicting interpretations, indicating further work on this proxy is required. The G. ruber Mg/Ca results suggest that the SST of the outflow passages were influenced by high latitude Southern Hemisphere temperature. At approximately 10,000 years before present, there was a warming in the Makassar Strait. This local warming was coincident with the flooding of the Sunda Shelf, which opened a connection between the South China Sea and the Indonesian Throughflow. AbstractAs the only low-latitude connection between ocean basins, the Indonesian Throughflow allows the direct transmission of heat and salinity between the Pacific and Indian Oceans. Despite its potential importance, the role of the Indonesian Throughflow in global ocean circulation and regional climate is still not clear due to sparse measurements and the relative difficulty of modeling the region. The Mg/Ca and 6180 of calcite of the calcitic planktic foraminifera Globigerinoides ruber (G.ruber) were used to estimate the sea surface temperature and 6180 of water, an indicator of hydrologic conditions, over the past 20,000 years. I also attempted to estimate thermocline structure using the foraminifera, Pulleniatina obliquiloculata, AcknowledgementsWhile there is certainly a sense of relief to be finishing my thesis, it is also bittersweet. It will be extremely difficult for me to leave behind my good friends and colleagues.I could not ask for a better advisor (and friend and mentor) than Delia Oppo. Her commitment to her students, family, and science is an inspiration. She is extremely patient, and was always willing to let me do things my way, though I would have likely finished my degree two years early had I just listened to her in the first place. I did listen to her regarding family, when she told me, "By the time you want children, it will be too late." My son and I are particularly grateful for this piece of advice.I owe a big thank you to my committee members. Bill Curry, Jake Gebbie, and Kerry Emanuel guided my research and helped me create a stronger thesis.I could not have finished without the help of Olivier Marchal. Olivier's eagerness to answer any question I had (and perhaps some I had not yet realized I had) was always appreciated. His willingness to read my thesis and chair my defense on 24 hours notice is a testament to his generosity.We are lucky to have excellent collaborators. Mahyar Mohtadi (University of Bremen) and Brad Linsley (LDEO) have provided excellent feedback on many drafts of this thesis....

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Evidence for Indonesian Throughflow slowdown during Heinrich events 3–5

Cited by 42 publications

References 67 publications

Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary

Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary

Water and carbon stable isotope records from natural archives: a new database and interactive online platform for data browsing, visualizing and downloading

The centennial and millennial variability of the IndoPacific Warm Pool and the Indonesian Throughflow

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