Response of North American Great Basin Lakes to Dansgaard–Oeschger oscillations

Benson, Larry; Lund, Steve P.; Negrini, Robert M.; Linsley, Braddock K.; Zic, Mladen

doi:10.1016/s0277-3791(03)00210-5

Cited by 63 publications

(56 citation statements)

References 59 publications

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“…Although some lake-based studies reached the opposite conclusion (e.g. Zic et al, 2002;Benson et al, 2003), these results generally corroborate previously proposed connections between the largest Great Basin pluvial lakes and North Atlantic climate variability (e.g. Phillips et al, 1994;Oviatt, 1997).…”

Section: Introductionsupporting

confidence: 88%

Temporal correspondence between pluvial lake highstands in the southwestern US and Heinrich Event 1

Munroe

Laabs

2012

J Quaternary Science

105

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Pluvial lakes were abundant in the southwestern United States during Pleistocene glaciations, particularly in the Great Basin. Many of these lakes occupied closed basins; therefore, fluctuations of their water surface elevations are valuable sources of paleoclimate information. Histories of the largest lakes are well constrained, whereas dozens of smaller lakes that were present in this region have received relatively little scientific attention. Given their dimensions, these smaller lakes were climatically sensitive and can offer important information about Quaternary climate variability. Here we present new ages for the highstands of three previously undated small lakes based on radiocarbon dating of gastropod shells recovered from beach ridges. These results are combined with other published and unpublished 14 C ages to yield an extensive compilation of highstand shoreline ages for lakes of all sizes throughout the southwestern US. The results indicate that although some lakes reached highstands during the Last Glacial Maximum, the strongest temporal correspondence is between highstands and Heinrich Event H1. These results are consistent with speleothem-based reconstructions of effective moisture in the southwestern US, which show increased precipitation during stadials of the last glacial cycle. Figure 1. (A) Map of pluvial lakes in the southwestern USA. Lake names are given along with highstand ages (median probability of the 2-sigma calibration range) in k cal a BP. Codes in parentheses refer to Fig. 3 and Tables 1-3. Analysis focused on highstands after 21k cal a BP; older highstands are listed without codes, and are not plotted in Fig. 3. Dates shown in purple fall during the latter part of the LGM, whereas dates shown in cyan fall during Heinrich Stadial 1. For clarity, only dated lakes are shown. The outline of the Great Basin is dashed. The Sierra Nevada (SN), San Bernadino (SB) and Wasatch Mountains (W) are labeled. (B) Schematic model of changes in the mean position of the Polar Jet Stream (PJS) and corresponding pluvial lake levels across the Great Basin for the Late LGM ($21-18k cal a BP) and HS-1 ($18-15k cal a BP).

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Section: Introductionsupporting

confidence: 88%

Temporal correspondence between pluvial lake highstands in the southwestern US and Heinrich Event 1

Munroe

Laabs

2012

J Quaternary Science

105

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“…Kirby et al (2006) used sediments from Baldwin Lake in Southern California, spanning the last glacial period to demonstrate that periods of supposed super-ENSO activity [i.e. preferred El Niño-like conditions (Stott et al 2002)] were associated with lake level lowstands at Baldwin Lake and elsewhere in western North America (Benson et al 2003). The new Lake Elsinore data seem to support the conclusions of Kirby et al (2006) that ENSO's forcing on the climate of Southern California is decoupled at longer timescales than that captured in the modern/historical record.…”

Section: A Comparison To Paleo-enso Reconstructionsmentioning

confidence: 99%

A Holocene record of Pacific Decadal Oscillation (PDO)-related hydrologic variability in Southern California (Lake Elsinore, CA)

et al. 2010

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High-resolution terrestrial records of Holocene climate from Southern California are scarce. Moreover, there are no records of Pacific Decadal Oscillation (PDO) variability, a major driver of decadal to multi-decadal climate variability for the region, older than 1,000 years. Recent research on Lake Elsinore, however, has shown that the lake's sediments hold excellent potential for paleoenvironmental analysis and reconstruction. New 1-cm contiguous grain size data reveal a more complex Holocene climate history for Southern California than previously recognized at the site. A modern comparison between the twentieth century PDO index, lake level change, San Jacinto River discharge, and percent sand suggests that sand content is a reasonable, qualitative proxy for PDO-related, hydrologic variability at both multi-decadal-to-centennial as well as event (i.e. storm) timescales. A depositional model is proposed to explain the sand-hydrologic proxy. The sand-hydrologic proxy data reveal nine centennial-scale intervals of wet and dry climate throughout the Holocene. Percent total sand values [1.5 standard deviation above the 150-9,700 cal year BP average are frequent between 9,700 and 3,200 cal year BP (n = 41), but they are rare from 3,200 to 150 cal year BP (n = 6). This disparity is interpreted as a change in the frequency of exceptionally wet (high discharge) years and/or changes in large storm activity. A comparison to other regional hydrologic proxies (10 sites) shows more then

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“…Rock-surface erosion produces 10 Be ages that are too young and 36 Cl ages that are too old (for erosion of o30 cm of rock surface; see Fig. 6 in Benson et al, 2003). Boulder geometry can also affect its surfaceexposure age.…”

Section: Interpretation Of Moraine Ages From Boulder Surfaceexposure mentioning

confidence: 99%

“…Instead, fluctuations of western alpine glaciers have often been correlated with North Atlantic air-temperature excursions, such as those associated with Heinrich (H) events (Clark and Bartlein, 1995;Phillips et al, 1996a;Licciardi et al, 2004) and Dansgaard-Oeschger (D-O) events (Benson et al, 2003), under the assumption that these events are hemispheric or global in scale. Climate forcing of glacier advances and retreats also has been attributed to the waxing and waning of the Laurentide Ice sheet (LIS) and the repositioning of the polar jet stream (PJS), which responds to changes in size of the LIS.…”

Section: Introductionmentioning

confidence: 99%

New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado

Benson

Madole

Landis

et al. 2005

Quaternary Science Reviews

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New cosmogenic surface-exposure ages of moraine-crest boulders from southwestern Colorado are compared with published surface-exposure ages of boulders from moraine complexes in north-central Colorado and in west-central (Fremont Lake basin) Wyoming.10 Be data sets from the three areas were scaled to a single 10 Be production rate of 5.4 at/g/yr at sea level and high latitude (SLHL), which represents the average 10 Be production rate for two high-altitude, mid-latitude sites in the western United States (US) and Austria. Multiple nuclide ages on single boulders indicate that this 10 Be production rate yields ages comparable to those calculated with a commonly used 36 Cl production scheme. The average age and age range of moraine-crest boulders on terminal moraines at the southwestern Colorado and Wyoming sites are similar, indicating a retreat from their positions $16.8 36 Cl ka (Cosmogenic ages in this paper are labeled 10 Be or 36 Cl ka or just ka when both 10 Be or 36 Cl ages are being discussed; radiocarbon ages are labeled 14 C ka, calibrated radiocarbon are labeled cal ka, and calendar ages are labeled calendar ka. Errors (71s) associated with ages are shown in tables. Radiocarbon ages were calibrated using the data of Hughen et al. (Science 303 (2004) 202). This suggests a near-synchronous retreat of Pinedale glaciers across a 470-km latitudinal range in the Middle and Southern Rocky Mountains. Hypothetical corrections for snow shielding and rock-surface erosion shifts the time of retreat to between 17.2 and 17.5 10 Be ka at Pinedale, Wyoming, and between 16.3 and 17.3 36 Cl ka at Hogback Mountain, Colorado.

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Response of North American Great Basin Lakes to Dansgaard–Oeschger oscillations

Cited by 63 publications

References 59 publications

Temporal correspondence between pluvial lake highstands in the southwestern US and Heinrich Event 1

Temporal correspondence between pluvial lake highstands in the southwestern US and Heinrich Event 1

A Holocene record of Pacific Decadal Oscillation (PDO)-related hydrologic variability in Southern California (Lake Elsinore, CA)

New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado

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