A review of Glacial and Holocene paleoclimate records from southernmost Patagonia (49–55°S)

2012 ◽  
Vol 53 ◽  
pp. 1-23 ◽  
Author(s):  
Rolf Kilian ◽  
Frank Lamy
Keyword(s):  
Holocene Paleoclimate ◽  
Paleoclimate Records

Holocene paleoclimate records from a large California estuarine system and its watershed region: linking watershed climate and bay conditions

2006 ◽  
Vol 25 (13-14) ◽  
pp. 1570-1598 ◽  
Author(s):  
Frances P. Malamud-Roam ◽  
B. Lynn Ingram ◽  
Malcolm Hughes ◽  
Joan L. Florsheim
Keyword(s):  
Estuarine System ◽  
Holocene Paleoclimate ◽  
Paleoclimate Records

scholarly journals A multiproxy database of western North American Holocene paleoclimate records

2020 ◽  
Author(s):  
Cody C. Routson ◽  
Darrell S. Kaufman ◽  
Nicholas P. McKay ◽  
Michael P. Erb ◽  
Stéphanie H. Arcusa ◽  
...  
Keyword(s):  
North American ◽  
North Pacific ◽  
Future Climate Change ◽  
Proxy Records ◽  
The North ◽  
Climate Reconstructions ◽  
Holocene Paleoclimate ◽  
Paleoclimate Records ◽  
Machine Readable ◽  
The North Pacific

Abstract. Holocene climate reconstructions are useful for understanding the diverse features and spatial heterogeneity of past and future climate change. Here we present a database of western North American Holocene paleoclimate records. The database gathers paleoclimate time series from 209 terrestrial and marine sites, including 382 individual proxy records. The records span at least 4000 of the last 12 000 years (median duration = 10 603 years), and have been screened for resolution, chronologic control, and climate sensitivity. Records were included that reflect temperature, hydroclimate, or circulation features. The database is shared in the machine readable Linked Paleo Data (LiPD) format and includes geochronologic data for generating site-level time-uncertain ensembles. This publicly accessible and curated collection of proxy paleoclimate records will have wide research applications, including, for example, investigations of the primary features of ocean-atmospheric circulation along the eastern margin of the North Pacific and the latitudinal response of climate to orbital changes. The database is available for download at: https://doi.org/10.6084/m9.figshare.12863843.v1 (Routson and McKay, 2020).

Supplementary material to "A multiproxy database of western North American Holocene paleoclimate records"

2020 ◽  
Author(s):  
Cody C. Routson ◽  
Darrell S. Kaufman ◽  
Nicholas P. McKay ◽  
Michael P. Erb ◽  
Stéphanie H. Arcusa ◽  
...  
Keyword(s):  
North American ◽  
Holocene Paleoclimate ◽  
Supplementary Material ◽  
Paleoclimate Records

scholarly journals A multiproxy database of western North American Holocene paleoclimate records

2021 ◽  
Vol 13 (4) ◽  
pp. 1613-1632
Author(s):  
Cody C. Routson ◽  
Darrell S. Kaufman ◽  
Nicholas P. McKay ◽  
Michael P. Erb ◽  
Stéphanie H. Arcusa ◽  
...  
Keyword(s):  
North American ◽  
North Pacific ◽  
Future Climate Change ◽  
Proxy Records ◽  
The North ◽  
Climate Reconstructions ◽  
Holocene Paleoclimate ◽  
Paleoclimate Records ◽  
Machine Readable ◽  
The North Pacific

Abstract. Holocene climate reconstructions are useful for understanding the diverse features and spatial heterogeneity of past and future climate change. Here we present a database of western North American Holocene paleoclimate records. The database gathers paleoclimate time series from 184 terrestrial and marine sites, including 381 individual proxy records. The records span at least 4000 of the last 12 000 years (median duration of 10 725 years) and have been screened for resolution, chronologic control, and climate sensitivity. Records were included that reflect temperature, hydroclimate, or circulation features. The database is shared in the machine readable Linked Paleo Data (LiPD) format and includes geochronologic data for generating site-level time-uncertain ensembles. This publicly accessible and curated collection of proxy paleoclimate records will have wide research applications, including, for example, investigations of the primary features of ocean–atmospheric circulation along the eastern margin of the North Pacific and the latitudinal response of climate to orbital changes. The database is available for download at https://doi.org/10.6084/m9.figshare.12863843.v1 (Routson and McKay, 2020).

Twelfth Century AD

2017 ◽  
Author(s):  
Lonnie G. Thompson ◽  
Alan L. Kolata
Keyword(s):  
Climate Change ◽  
Southern Oscillation ◽  
Sediment Cores ◽  
Critical Role ◽  
Lake Titicaca ◽  
Independent Evidence ◽  
Tropical Regions ◽  
Ice Cap ◽  
Paleoclimate Records ◽  
Past Climate Change

Climate is a fundamental and independent variable of human existence. Given that 50 percent of the Earth’s surface and much of its population exist between 30oN and 30oS, paleoenvironmental research in the Earth’s tropical regions is vital to our understanding of the world’s current and past climate change. Most of the solar energy that drives the climate system is absorbed in these regions. Paleoclimate records reveal that tropical processes, such as variations in the El Niño-Southern Oscillation (ENSO), have affected the climate over much of the planet. Climatic variations, particularly in precipitation and temperature, play a critical role in the adaptations of agrarian cultures located in zones of environmental sensitivity, such as those of the coastal deserts, highlands, and altiplano of the Andean region. Paleoclimate records from the Quelccaya ice cap (5670 masl) in highland Peru that extend back ~1800 years show good correlation between precipitation and the rise and fall of pre-Hispanic civilizations in western Peru and Bolivia. Sediment cores extracted from Lake Titicaca provide independent evidence of this correspondence with particular reference to the history of the pre-Hispanic Tiwanaku state centered in the Andean altiplano. Here we explore, in particular, the impacts of climate change on the development and ultimate dissolution of this altiplano state.

scholarly journals Drought, agricultural adaptation, and sociopolitical collapse in the Maya Lowlands

2015 ◽  
Vol 112 (18) ◽  
pp. 5607-5612 ◽  
Author(s):  
Peter M. J. Douglas ◽  
Mark Pagani ◽  
Marcello A. Canuto ◽  
Mark Brenner ◽  
David A. Hodell ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Sediment Cores ◽  
Classic Period ◽  
Maya Lowlands ◽  
Agricultural Adaptation ◽  
Terminal Classic ◽  
Paleoclimate Records ◽  
Early Classic Period ◽  
Plant Wax ◽  
Terminal Classic Period

Paleoclimate records indicate a series of severe droughts was associated with societal collapse of the Classic Maya during the Terminal Classic period (∼800–950 C.E.). Evidence for drought largely derives from the drier, less populated northern Maya Lowlands but does not explain more pronounced and earlier societal disruption in the relatively humid southern Maya Lowlands. Here we apply hydrogen and carbon isotope compositions of plant wax lipids in two lake sediment cores to assess changes in water availability and land use in both the northern and southern Maya lowlands. We show that relatively more intense drying occurred in the southern lowlands than in the northern lowlands during the Terminal Classic period, consistent with earlier and more persistent societal decline in the south. Our results also indicate a period of substantial drying in the southern Maya Lowlands from ∼200 C.E. to 500 C.E., during the Terminal Preclassic and Early Classic periods. Plant wax carbon isotope records indicate a decline in C4 plants in both lake catchments during the Early Classic period, interpreted to reflect a shift from extensive agriculture to intensive, water-conservative maize cultivation that was motivated by a drying climate. Our results imply that agricultural adaptations developed in response to earlier droughts were initially successful, but failed under the more severe droughts of the Terminal Classic period.

scholarly journals South Pole glacial climate reconstruction from multi-borehole laser particulate stratigraphy

2013 ◽  
Vol 59 (218) ◽  
pp. 1117-1128 ◽  
Author(s):  
Keyword(s):  
Particle Physics ◽  
Volcanic Ash ◽  
Ice Core ◽  
Hot Water ◽  
Radiometric Dating ◽  
South Pole ◽  
Last Glacial Period ◽  
Annual Layer ◽  
Paleoclimate Records ◽  
The Last Glacial

AbstractThe IceCube Neutrino Observatory and its prototype, AMANDA, were built in South Pole ice, using powerful hot-water drills to cleanly bore >100 holes to depths up to 2500 m. The construction of these particle physics detectors provided a unique opportunity to examine the deep ice sheet using a variety of novel techniques. We made high-resolution particulate profiles with a laser dust logger in eight of the boreholes during detector commissioning between 2004 and 2010. The South Pole laser logs are among the most clearly resolved measurements of Antarctic dust strata during the last glacial period and can be used to reconstruct paleoclimate records in exceptional detail. Here we use manual and algorithmic matching to synthesize our South Pole measurements with ice-core and logging data from Dome C, East Antarctica. We derive impurity concentration, precision chronology, annual-layer thickness, local spatial variability, and identify several widespread volcanic ash depositions useful for dating. We also examine the interval around ∼74 ka recently isolated with radiometric dating to bracket the Toba (Sumatra) supereruption.

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