Map showing spatial and temporal relations of mountain and continental glaciations on the Northern Plains, primarily in northern Montana and northwestern North Dakota

Fullerton, David S.; Colton, R.B.; Bush, Charles A.; Straub, Arthur W.

doi:10.3133/sim2843

Cited by 21 publications

(25 citation statements)

References 137 publications

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“…Furthermore, the lowermost zones of Peoria Loess in western Iowa do not contain . Loess thickness and distribution taken from compilation in Bettis et al (2003) and sources therein; Laurentide ice sheet extent generalized from Fullerton et al (2003Fullerton et al ( , 2004. LL, Loveland; S, Sioux City.…”

Section: Introductionmentioning

confidence: 99%

Chronology and provenance of last-glacial (peoria) loess in western iowa and paleoclimatic implications

et al. 2013

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S.; Paces, James B.; and Reynolds, Richard L., "Chronology and provenance of last-glacial (Peoria) loess in western Iowa and paleoclimatic implications" (2013 Geologic archives show that the Earth was dustier during the last glacial period. One model suggests that increased gustiness (stronger, more frequent winds) enhanced dustiness. We tested this at Loveland, Iowa, one of the thickest deposits of last-glacial-age (Peoria) loess in the world. Based on K/Rb and Ba/Rb, loess was derived not only from glaciogenic sources of the Missouri River, but also distal loess from non-glacial sources in Nebraska. Optically stimulated luminescence (OSL) ages provide the first detailed chronology of Peoria Loess at Loveland. Deposition began after~27 ka and continued until~17 ka. OSL ages also indicate that mass accumulation rates (MARs) of loess were not constant. MARs were highest and grain size was coarsest during the time of middle Peoria Loess accretion,~23 ka, when~10 m of loess accumulated in no more thañ 2000 yr and possibly much less. The timing of coarsest grain size and highest MAR, indicating strongest winds, coincides with a summer-insolation minimum at high latitudes in North America and the maximum southward extent of the Laurentide ice sheet. These observations suggest that increased dustiness during the last glacial period was driven largely by enhanced gustiness, forced by a steepened meridional temperature gradient.Published by Elsevier Inc. on behalf of University of Washington.

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Section: Introductionmentioning

confidence: 99%

Chronology and provenance of last-glacial (peoria) loess in western iowa and paleoclimatic implications

et al. 2013

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“…The extent of the Laurentide ice sheet is not well defined along much of its southwestern margin (Alden, 1932;Colton et al, 1961;Fullerton and Colton, 1986;Fullerton et al, 2004;Fig. 1).…”

Section: Extent Of the Laurentide Ice Sheet In Montanamentioning

confidence: 95%

“…1). Till on the plains of Montana is mostly thin and patchy and the southernmost till exposures consist almost entirely of ground moraine (Fullerton et al, 2004). The primary evidence for continental glaciation in central Montana is the presence of exotic boulders on the land surface.…”

Section: Extent Of the Laurentide Ice Sheet In Montanamentioning

confidence: 99%

Glacial Lake Musselshell: Late Wisconsin slackwater on the Laurentide ice margin in central Montana, USA

et al. 2006

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“…1) is present within southern Canada, northeastern Montana, and western North Dakota. The aquifer is composed of till, clay, silt, sand, and gravels (Fullerton et al, 2004). The average P and recharge estimates are 382 mm/yr and 4.7 mm/yr respectively (Table 2).…”

Section: Death Valley Aquifer the Death Valley Aquifer Systemmentioning

confidence: 99%

Comparing potential recharge estimates from three Land Surface Models across the western US

Niraula

Meixner

Ajami

et al. 2017

Journal of Hydrology

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a b s t r a c tGroundwater is a major source of water in the western US. However, there are limited recharge estimates in this region due to the complexity of recharge processes and the challenge of direct observations. Land surface Models (LSMs) could be a valuable tool for estimating current recharge and projecting changes due to future climate change. In this study, simulations of three LSMs (Noah, Mosaic and VIC) obtained from the North American Land Data Assimilation System (NLDAS-2) are used to estimate potential recharge in the western US. Modeled recharge was compared with published recharge estimates for several aquifers in the region. Annual recharge to precipitation ratios across the study basins varied from 0.01% to 15% for Mosaic, 3.2% to 42% for Noah, and 6.7% to 31.8% for VIC simulations. Mosaic consistently underestimates recharge across all basins. Noah captures recharge reasonably well in wetter basins, but overestimates it in drier basins. VIC slightly overestimates recharge in drier basins and slightly underestimates it for wetter basins. While the average annual recharge values vary among the models, the models were consistent in identifying high and low recharge areas in the region. Models agree in seasonality of recharge occurring dominantly during the spring across the region. Overall, our results highlight that LSMs have the potential to capture the spatial and temporal patterns as well as seasonality of recharge at large scales. Therefore, LSMs (specifically VIC and Noah) can be used as a tool for estimating future recharge in data limited regions.

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Map showing spatial and temporal relations of mountain and continental glaciations on the Northern Plains, primarily in northern Montana and northwestern North Dakota

Cited by 21 publications

References 137 publications

Chronology and provenance of last-glacial (peoria) loess in western iowa and paleoclimatic implications

Chronology and provenance of last-glacial (peoria) loess in western iowa and paleoclimatic implications

Glacial Lake Musselshell: Late Wisconsin slackwater on the Laurentide ice margin in central Montana, USA

Comparing potential recharge estimates from three Land Surface Models across the western US

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