@article {357,
	title = {Abrupt climate change and collapse of deep-sea ecosystems},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	volume = {105},
	year = {2008},
	note = {id: 1884; 261KQ Times Cited:12 Cited References Count:71Y},
	pages = {1556-1560},
	abstract = {We investigated the deep-sea fossil record of benthic ostracodes during periods of rapid climate and oceanographic change over the past 20,000 years in a core from intermediate depth in the northwestern Atlantic. Results show that deep-sea benthic community "collapses" occur with faunal turnover of up to 50\% during major climatically driven oceanographic changes. Species diversity as measured by the Shannon-Wiener index falls from 3 to as low as 1.6 during these events. Major disruptions in the benthic communities commenced with Heinrich Event 1, the Inter-Allerod Cold Period (IACP: 13.1 ka), the Younger Dryas (YD: 12.9-11.5 ka), and several Holocene Bond events when changes in deep-water circulation occurred. The largest collapse is associated with the YD/IACP and is characterized by an abrupt two-step decrease in both the upper North Atlantic Deep Water assemblage and species diversity at 13.1 ka and at 12.2 ka. The ostracode fauna at this site did not fully recover until approximate to 8 ka, with the establishment of Labrador Sea Water ventilation. Ecologically opportunistic slope species prospered during this community collapse. Other abrupt community collapses during the past 20 ka generally correspond to millennial climate events. These results indicate that deep-sea ecosystems are not immune to the effects of rapid climate changes occurring over centuries or less.},
	issn = {0027-8424},
	doi = {10.1073/pnas.0705486105},
	author = {Yasuhara, M. and Cronin, T. M. and deMenocal, P. B. and Okahashi, H. and Linsley, B. K.}
}
@article {261,
	title = {Constraints on the Pleistocene chronology of sediments from the Lomonosov Ridge},
	journal = {Paleoceanography},
	volume = {23},
	year = {2008},
	note = {id: 868; 281YL Times Cited:22 Cited References Count:55; YY},
	pages = {@Citation PA1S19},
	abstract = {[1] Despite its importance in the global climate system, age-calibrated marine geologic records reflecting the evolution of glacial cycles through the Pleistocene are largely absent from the central Arctic Ocean. This is especially true for sediments older than 200 ka. Three sites cored during the Integrated Ocean Drilling Program{\textquoteright}s Expedition 302, the Arctic Coring Expedition ( ACEX), provide a 27 m continuous sedimentary section from the Lomonosov Ridge in the central Arctic Ocean. Two key biostratigraphic datums and constraints from the magnetic inclination data are used to anchor the chronology of these sediments back to the base of the Cobb Mountain subchron ( 1215 ka). Beyond 1215 ka, two best fitting geomagnetic models are used to investigate the nature of cyclostratigraphic change. Within this chronology we show that bulk and mineral magnetic properties of the sediments vary on predicted Milankovitch frequencies. These cyclic variations record "glacial{\textquoteright}{\textquoteright} and "interglacial{\textquoteright}{\textquoteright} modes of sediment deposition on the Lomonosov Ridge as evident in studies of ice-rafted debris and stable isotopic and faunal assemblages for the last two glacial cycles and were used to tune the age model. Potential errors, which largely arise from uncertainties in the nature of downhole paleomagnetic variability, and the choice of a tuning target are handled by defining an error envelope that is based on the best fitting cyclostratigraphic and geomagnetic solutions.},
	issn = {0883-8305},
	doi = {10.1029/2007pa001551},
	author = {O{\textquoteright}Regan, M. and King, J. and Backman, J. and Jakobsson, M. and Palike, H. and Moran, K. and Heil, C. and Sakamoto, T. and Cronin, T. M. and Jordan, R. W.}
}
@article {517,
	title = {Increased terrestrial to ocean sediment and carbon fluxes in the northern chesapeake bay associated with twentieth century land alteration},
	journal = {Estuaries and Coasts},
	volume = {31},
	year = {2008},
	note = {id: 812; 316CY Times Cited:1 Cited References Count:54Y},
	pages = {492-500},
	abstract = {We calculated Chesapeake Bay (CB) sediment and carbon fluxes before and after major anthropogenic land clearance using robust monitoring, modeling and sedimentary data. Four distinct fluxes in the estuarine system were considered including (1) the flux of eroded material from the watershed to streams, (2) the flux of suspended sediment at river fall lines, (3) the burial flux in tributary sediments, and (4) the burial flux in main CB sediments. The sedimentary maximum in Ambrosia (ragweed) pollen marked peak land clearance (similar to 1900 A.D.). Rivers feeding CB had a total organic carbon (TOC)/total suspended solids of 0.24 +/- 0.12, and we used this observation to calculate TOC fluxes from sediment fluxes. Sediment and carbon fluxes increased by 138-269\% across all four regions after land clearance. Our results demonstrate that sediment delivery to CB is subject to significant lags and that excess post-land clearance sediment loads have not reached the ocean. Post-land clearance increases in erosional flux from watersheds, and burial in estuaries are important processes that must be considered to calculate accurate global sediment and carbon budgets.},
	issn = {1559-2723},
	doi = {10.1007/s12237-008-9048-5},
	author = {Saenger, C. and Cronin, T. M. and Willard, D. and Halka, J. and Kerhin, R.}
}
@article {262,
	title = {Quaternary paleoceanography of the central arctic based on Integrated Ocean Drilling Program Arctic Coring Expedition 302 foraminiferal assemblages},
	journal = {Paleoceanography},
	volume = {23},
	year = {2008},
	note = {id: 813; 281VR Times Cited:10 Cited References Count:84Y},
	abstract = {The Integrated Ocean Drilling Program (IODP) Arctic Coring Expedition (ACEX) Hole 4C from the Lomonosov Ridge in the central Arctic Ocean recovered a continuous 18 m record of Quaternary foraminifera yielding evidence for seasonally ice-free interglacials during the Matuyama, progressive development of large glacials during the mid-Pleistocene transition (MPT) similar to 1.2-0.9 Ma, and the onset of high-amplitude 100-ka orbital cycles similar to 500 ka. Foraminiferal preservation in sediments from the Arctic is influenced by primary (sea ice, organic input, and other environmental conditions) and secondary factors (syndepositional, long-term pore water dissolution). Taking these into account, the ACEX 4C record shows distinct maxima in agglutinated foraminiferal abundance corresponding to several interglacials and deglacials between marine isotope stages (MIS) 13-37, and although less precise dating is available for older sediments, these trends appear to continue through the Matuyama. The MPT is characterized by nearly barren intervals during major glacials (MIS 12, 16, and 22-24) and faunal turnover (MIS 12-24). Abundant calcareous planktonic (mainly Neogloboquadrina pachyderma sin.) and benthic foraminifers occur mainly in interglacial intervals during the Brunhes and very rarely in the Matuyama. A distinct faunal transition from calcareous to agglutinated foraminifers 200-300 ka in ACEX 4C is comparable to that found in Arctic sediments from the Lomonosov, Alpha, and Northwind ridges and the Morris Jesup Rise. Down-core disappearance of calcareous taxa is probably related to either reduced sea ice cover prior to the last few 100-ka cycles, pore water dissolution, or both.},
	issn = {0883-8305},
	doi = {10.1029/2007pa001484},
	author = {Cronin, T. M. and Smith, S. A. and Eynaud, F. and O{\textquoteright}Regan, M. and King, J.}
}
@article {662,
	title = {Holocene sea-level oscillations and environmental changes on the Eastern Black Sea shelf},
	journal = {Palaeogeography Palaeoclimatology Palaeoecology},
	volume = {246},
	year = {2007},
	note = {156gzTimes Cited:22Cited References Count:51},
	month = {Apr 6},
	pages = {228-259},
	abstract = {A multi-proxy study of four sediment cores from the Eastern (Caucasian) Black Sea shelf revealed five transgressive-regressive cycles overprinted on the general trend of glacioeustatic sea-level rise during the last 11,000 C-14 yr. These cycles are well represented in micro-and macrofossil assemblages, sedimentation rates, and gain size variations. The oldest recovered sediments were deposited in the Neoeuxinian semi-freshwater basin (similar to 10,500-9000 C-14 yr BP) and contain a Caspian-type mollusk fauna dominated by Dreissena rostriformis. Low delta O-18 and delta C-13 values are measured on this species. The first appearance of marine mollusks and ostracodes from the Mediterranean is established in this part of the Black Sea at similar to 8200 C-14 yr BP, i.e., about 1000-2000 yr later than the appearance of marine microfossils in the deeper part of the sea. The Early Holocene (Bugazian to Vityazevian) condensed section of shell and shelly mud sediments with at least two hiatuses represent a high-energy shelf-edge facies. It contains a transitional assemblage representing a mixture of Caspian and Mediterranean fauna. This pattern suggests a dual-flow regime via the Bosphorus after 8200 C-14 yr BR Caspian species disappear and oligolialine species decrease in abundance during the Vityazevian-Prekalamitian cycle. Later, during the Middle to Late Holocene, low sea-level stands are characterized by shell layers, whereas silty mud with various mollusk and ostracode assemblages rapidly accumulated during transgressions. Restricted mud accumulation, as well as benthic faunal composition and abundance, suggest high-energy and well-ventilated bottom water during low sea-level stands. A trend of O-18 enrichment in mollusk shells points to an increase in bottom-water salinity during the Vityazevian to Kalamitian transgressions (similar to 7000 to 5700 C-14 yr BP) due to a more open connection with the Mediterranean, while a pronounced increase in polyhaline species abundance is established during the Kalamitian to Djemetean transgressions (similar to 6400 to 2700 C-14 yr BP). However, the composition of the faunal assemblage indicates that bottom-water salinity never exceeded modem values of 18-20 psu. (c) 2006 Elsevier B.V. All rights reserved.},
	issn = {0031-0182},
	doi = {10.1016/j.palaeo.2006.09.014},
	author = {Ivanova, E. V. and Murdmaa, I. O. and Chepalyga, A. L. and Cronin, T. M. and Pasechnik, I. V. and Levchenko, O. V. and Howe, S. S. and Manushkina, A. V. and Platonova, E. A.}
}
@article {288,
	title = {Paleoecology and ecosystem restoration: case studies from Chesapeake Bay and the Florida Everglades},
	journal = {Frontiers in Ecology and the Environment},
	volume = {5},
	year = {2007},
	note = {id: 811; 227MD Times Cited:5 Cited References Count:51Y},
	pages = {491-498},
	abstract = {Climate extremes that cause droughts, floods, or large temperature fluctuations can complicate ecosystem restoration efforts focused on local and regional human disturbance. Restoration targets are often based primarily on monitoring data and modeling simulations, which provide information on species{\textquoteright} short-term response to disturbance and environmental variables. Consequently, the targets may be unsustainable under the spectrum of natural variability inherent in the system or under future climate change. Increasingly, ecologists and restoration planners recognize the value of the long temporal perspective provided by paleoecological data. Advances in paleoclimatology, including better climate proxy methods and temporal resolution, contribute to our understanding of ecosystem response to anthropogenic and climatic forcing at all time scales. We highlight paleoecological research in the Chesapeake Bay and the Florida Everglades and summarize the resulting contributions to restoration planning. Integration of paleoecological, historic, monitoring, and modeling efforts will lead to the development of sustainable, adaptive management strategies for ecosystem restoration.},
	issn = {1540-9295},
	doi = {10.1890/070015},
	author = {Willard, D. A. and Cronin, T. M.}
}
@article {264,
	title = {Rapid sea level rise and ice sheet response to 8,200-year climate event},
	journal = {Geophysical Research Letters},
	volume = {34},
	year = {2007},
	note = {id: 810; 225MA Times Cited:4 Cited References Count:32Y},
	abstract = {The largest abrupt climatic reversal of the Holocene interglacial, the cooling event 8.6 - 8.2 thousand years ago (ka), was probably caused by catastrophic release of glacial Lake Agassiz-Ojibway, which slowed Atlantic meridional overturning circulation (AMOC) and cooled global climate. Geophysical surveys and sediment cores from Chesapeake Bay reveal the pattern of sea level rise during this event. Sea level rose similar to 14 m between 9.5 to 7.5 ka, a pattern consistent with coral records and the ICE- 5G glacio-isostatic adjustment model. There were two distinct periods at similar to 8.9 - 8.8 and similar to 8.2 - 7.6 ka when Chesapeake marshes were drown as sea level rose rapidly at least similar to 12 mm yr(-1). The latter event occurred after the 8.6 - 8.2 ka cooling event, coincided with extreme warming and vigorous AMOC centered on 7.9 ka, and may have been due to Antarctic Ice Sheet decay.},
	issn = {0094-8276},
	doi = {10.1029/2007gl031318},
	author = {Cronin, T. M. and Vogt, P. R. and Willard, D. A. and Thunell, R. and Halka, J. and Berke, M. and Pohlman, J.}
}
@article {672,
	title = {Late-Holocene climate and ecosystem history from Chesapeake Bay sediment cores, USA},
	journal = {Holocene},
	volume = {13},
	year = {2003},
	note = {650thTimes Cited:56Cited References Count:101},
	pages = {201-214},
	abstract = {Palaeoclimate records from late-Holocene sediments in Chesapeake Bay, the largest estuary in the USA, provide evidence that both decadal to centennial climate variability and European colonization had severe impacts on the watershed and estuary. Using pollen and dinoflagellate cysts as proxies for mid-Atlantic regional precipitation, estuarine salinity and dissolved oxygen (DO) during the last 2300 years, we identified four dry intervals, centred on AD 50 (P1/D1), AD 1000 (P2/D2), AD 1400 (P3) and AD 1600 (P4). Two centennial-scale events, P1/D1 and P2/D2, altered forest composition and led to increased salinity and DO levels in the estuary. Intervals P3 and P4 lasted several decades, leading to decreased production of pine pollen. Periods of dry mid-Atlantic climate correspond to {\textquoteright}megadroughts{\textquoteright} identified from tree-ring records in the southeastern and central USA. The observed mid-Atlantic climate variability may be explained by changes in atmospheric circulation resulting in longer-term, perhaps amplified, intervals of meridional flow. After European colonization in the early seventeenth century, forest clearance for agriculture, timber and urbanization altered estuarine water quality, with dinoflagellate assemblages indicating reduced DO and increased turbidity.},
	issn = {0959-6836},
	doi = {10.1191/0959683603hl607rp},
	author = {Willard, D. A. and Cronin, T. M. and Verardo, S.}
}
@inbook {2420,
	title = {Ostracoda and paleoceanography},
	booktitle = {American Geophysical Union Monograph - The Ostracoda: Applications in Quaternay Research},
	year = {2002},
	note = {id: 1473},
	month = {2002},
	author = {Cronin, T. M. and Boomer, I. and Dwyer, G. S. and Rodriguez-Lazaro, J.},
	editor = {Holmes, J. A.}
}
@article {621,
	title = {Radiocarbon dating, chronologic framework, and changes in accumulation rates of Holocene estuarine sediments from Chesapeake Bay},
	journal = {Quaternary Research},
	volume = {57},
	year = {2002},
	note = {517wpTimes Cited:57Cited References Count:33},
	month = {Jan},
	pages = {58-70},
	abstract = {Rapidly accumulating Holocene sediments in estuaries commonly are difficult to sample and date. In Chesapeake Bay, we obtained sediment cores as much as 20 m in length and used numerous radiocarbon ages measured by accelerator mass spectrometry methods to provide the first detailed chronologies of Holocene sediment accumulation in the bay. Carbon in these sediments is a complex mixture of materials from a variety of sources. Analyses of different components of the sediments show that total organic carbon ages are largely unreliable, because much of the carbon (including coal) has been transported to the bay from upstream sources and is older than sediments in which it was deposited. Mollusk shells (clams, oysters) and foraminifera appear to give reliable results, although reworking and burrowing are potential problems. Analyses of museum specimens collected alive before atmospheric nuclear testing suggest that the standard reservoir correction for marine samples is appropriate for middle to lower Chesapeake Bay. The biogenic carbonate radiocarbon ages are compatible with (210)Pb and (137)Cs data and pollen stratigraphy from the same sites.Post-settlement changes in sediment transport and accumulation is an important environmental issue in many estuaries, including the Chesapeake. Our data show that large variations in sediment mass accumulation rates occur among sites. At shallow water sites, local factors seem to control changes in accumulation rates with time. Our two relatively deep-water sites in the axial channel of the bay have different long-term average accumulation rates, but the history of sediment accumulation at these sites appears to reflect overall conditions in the bay. Mass accumulation rates at the two deep-water sites rapidly increased by about fourfold coincident with widespread land clearance for agriculture in the Chesapeake watershed.},
	issn = {0033-5894},
	doi = {10.1006/qres.2001.2285},
	author = {Colman, S. M. and Baucom, P. C. and Bratton, J. F. and Cronin, T. M. and McGeehin, J. P. and Willard, D. and Zimmerman, A. R. and Vogt, P. R.}
}
@inbook {1393,
	title = {Radiocarbon dating of Marion-Dufresne cores MD99-2204, 2207, and 2209, Chesapeake Bay},
	booktitle = {Initial Report on IMAGES V Cruise of the Marion-Dufresne to the Chesapeake Bay June 20-22, 1999},
	volume = {Open-File Report 00-306},
	year = {2000},
	note = {id: 1414},
	month = {2000},
	pages = {72-77},
	publisher = {U. S. Geological Survey},
	organization = {U. S. Geological Survey},
	author = {Colman, S. M. and Bratton, J. F. and Baucom, P. C.},
	editor = {Cronin, T. M.}
}
