Holocene lake-level trends in the Rocky Mountains, U.S.A.

Shuman, Bryan N.; Henderson, Anna K.; Colman, Steven M.; Stone, Jeffery R.; Fritz, Sherilyn C.; Stevens, L.; Power, Mitchell J.; Whitlock, Cathy

doi:10.1016/j.quascirev.2009.03.003

Cited by 123 publications

(164 citation statements)

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“…Grain size measurements of lacustrine sediments offer insight into watershed and 443 in lake processes that are sensitive to climatic variations (e.g., Shuman et al, 2009; 444 Dearing, 1997;Conroy et al, 2008). Today at Nir'pa Co, below freezing temperatures 445 and minimal precipitation between November and April limit watershed erosion and the 446 transport of clastic material to the lake during the cold season (Fig.…”

Section: Lithic and Grain Size Proxy Interpretation 442mentioning

confidence: 99%

Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir’pa Co, southeastern Tibet

et al. 2016

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Late Holocene Indian summer monsoon variability revealed from a 3,300-year-long 1 lake sediment record from Nir'pa Co, southeastern years. Constrained by modern calibration elevated silt and lithics and low sand and clay 24 between 3.3-2.4 ka and 1.3 ka to the present indicate two pluvial phases with lake levels 25 near their current overflow elevation. Between 2.4-1.3 ka, a sharp increase in sand and 26 corresponding decrease in lithics and silt suggest drier conditions and lower lake levels at 27Nir'pa Co. Hydroclimate expressions in the sedimentological proxies during the 28Medieval Climate Anomaly (MCA) and Little Ice Age (LIA) are not statistically 29 significant, suggesting that these events were minor compared to the millennial scale 30 variability on which they were superimposed. However, decreasing sand and increasing 31 lithics and silt during the MCA between 950-800 cal yr B.P. may suggest briefly wetter 32 conditions while increasing sand and reduced lithics and silt from 500-200 cal yr B.P. an area referred to as the Third Pole Environment (Qiu, 2008), show that the Indian 47 summer monsoon (ISM) reached a maximum during the early and middle Holocene 48 between 10 and approximately 6 ka when boreal summer insolation peaked and strong 49 tropical Pacific sea surface temperature (SST) gradients resembled a La Niña-like mean 50 state (Koutavas et al., 2006;He et al., 2004;Bird et al., 2014;Cai et al., 2012; Yanhong 51 et al., 2006;Marchitto et al., 2010;Morrill et al., 2003). The late Holocene, in contrast, 52 has been characterized by increasing aridity as summer insolation waned and an 53 increasingly El Niño-like mean state developed in the tropical Pacific. Despite an 54 improved understanding of long-term Holocene ISM trends and the likely driving 55 mechanisms, higher frequency ISM variations have been more difficult to characterize 56 because there are comparatively few high-resolution records from the Third Pole (Chen et 57 al., 2015). The late Holocene is under represented by high-resolution paleoclimate 58 records in part because mean state aridity resulted in decreased resolution (e.g., Bird et 59 al., 2014) or depositional hiatuses in many ISM archives (Berkelhammer et al., 2012; 60 Morrill et al., 2006;Cai et al., 2012). The paucity of climate records detailing ISM 61 variability during the last few millennia limits our understanding of monsoon dynamics 62 during a time when climatic boundary conditions were generally similar to the present, 63 but perturbations in radiative and other forcings, including ocean-atmosphere processes, 64 produced widely recognized climatic events including: the Medieval Climate Anomaly 65 (MCA; 950-1250 AD) and Little Ice Age (LIA; 1450-1900 AD) (Mann et al., 2009). 66Paleoclimate records from the Third Pole that span at least part of the late 67Holocene suggest that within this period of general aridity there were regional scale 68Bird et al. (2016) Page 4 of 39 fluctuations in ISM precipitation, lake levels and temperature (Bird et al., 2014; 69 ...

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Section: Lithic and Grain Size Proxy Interpretation 442mentioning

confidence: 99%

Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir’pa Co, southeastern Tibet

et al. 2016

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“…7). It is expected that this model is appropriate for other shallow, arid-environment lakes, but inappropriate for temperate, deep lakes with relatively stable lake level, lake basins with a rapid depth change from the littoral to the profundal environment, and/or small catchment basins which lack a major inlet (Shuman et al 2009). …”

Section: Depositional Model For Grain Size Proxymentioning

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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“…No attempt is made here to discuss the proxy climate records of the more interior regions of the western US such as the Rocky Mountains. Although enhanced expression of ENSO precipitation patterns during the late Holocene has been suggested in these more easterly regions (see Brunelle et al, 2005;Whitlock et al, 2008;Shapley et al, 2009;Shuman et al, 2009), annual precipitation in this region is seasonally derived from numerous sources (Mock, 1996), making detailed ENSO detection more difficult.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Late Holocene ENSO/PDO expression along the margins of the eastern North Pacific

Barron

Anderson

2011

Quaternary International

144

158

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a b s t r a c tPacific climate is known to have varied during the Holocene, but spatial patterns remain poorly defined. This paper compiles terrestrial and marine proxy data from sites along the northeastern Pacific margins and proposes that they indicate 1) suppressed ENSO conditions during the middle Holocene between w8000 and 4000 cal BP with a North Pacific that generally resembled a La Niña-like or more negative PDO phase and 2) a climate transition between w4200 and 3000 cal BP that appears to be the teleconnected expression to a more modern-like ENSO Pacific. Compared to modern day conditions, the compiled data suggest that during the middle Holocene, the Aleutian Low was generally weaker during the winter and/or located more to the west, while the North Pacific High was stronger during the summer and located more to the north. Coastal upwelling off California was more enhanced during the summer and fall but suppressed during the spring. Oregon and California sea surface temperatures (SSTs) were cooler. The Santa Barbara Basin had an anomalous record, suggesting warmer SSTs.Late Holocene records indicate a more variable, El Niño-like, and more positive PDO Pacific. The Aleutian Low became more intensified during the winter and/or located more to the east. The North Pacific High became weaker and/or displaced more to the south. Coastal upwelling off California intensified during the spring but decreased during the fall. Oregon and California SSTs became warmer, recording the shoreward migration of sub-tropical gyre waters during the fall, while spring upwelling (cooler SST) increased in the Santa Barbara Basin. The high-resolution proxy records indicate enhanced ENSO and PDO variability after w4000 cal BP off southern California, w3400 cal BP off northern California, and by w2000 cal BP in southwestern Yukon. A progressively northward migration of the ENSO teleconnection during the late Holocene is proposed.

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Holocene lake-level trends in the Rocky Mountains, U.S.A.

Cited by 123 publications

References 103 publications

Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir’pa Co, southeastern Tibet

Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir’pa Co, southeastern Tibet

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

Enhanced Late Holocene ENSO/PDO expression along the margins of the eastern North Pacific

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