Nachruf Helmut K. Weickmann by Peter Wendling

“…Nach einem Sonntagsspaziergang am Fuße der Rocky Mountains, die er so sehr liebte, setzte ein Herzversagen seinem Leben ein plötzliches, unerwartetes Ende. …”
Get full text

Variations in the surface velocity of an alpine cirque glacier by J. W. SANDERS, K. M. CUFFEY, K. R. MACGREGOR, J. L. KAVANAUGH, C. F. DOW

“…This model is incorrect for basin-filling cirque glaciers, as we have demonstrated at West Washmawapta Glacier, a small glacier in the Canadian Rocky Mountains. Here we report observations at the same glacier that assess whether complex temporal variations of flow also occur. …”
Get full text

Investigating Targets of Avian Habitat Management to Eliminate an Ecological Trap by Bruce A. Robertson

“…Traps represent a new threat to the conservation of native species, yet little attention has been given to developing practical approaches to eliminating them. In the northern Rocky Mountains of Montana, Olive-sided Flycatchers (Contopus cooperi) prefer to settle in patches of selectively harvested forest versus burned forest despite the lower reproductive success and higher nest predation risk associated with the former habitat. …”
Get full text

A pathogen's spatial range is not constrained by geographical features in the flax rust pathosystem by Keenan Duggal, Ian Miller, Juliana Jiranek, Jessica Metcalf

“…Here, we characterize range determinants for the model system of Lewis flax (Linum lewisii) and its pathogen, flax rust (Melampsora lini), in the Rocky Mountains. Transect surveys were performed to assess three relationships: (i) the effect of geographical features—elevation, slope aspect, slope grade, and land cover—on flax presence and density, (ii) the effect of geographical features on flax rust presence and prevalence, and (iii) the effects of flax's local population density and metapopulation structure on flax rust presence and prevalence. …”
Get full text

Quantifying climate change impacts on low flows of small high mountain watersheds: A nonstationary approach by Mohammad M. Hasan, Courtenay Strong, Paul D. Brooks, Steven J. Burian, Michael E. Barber

“…Study region: The Utah Wasatch Mountains along the eastern Great Basin and the western Rocky Mountains. Study focus: Changes in seasonal precipitation patterns and summer evaporation rates due to increases in temperatures will have severe impacts on low flows of the mountainous watersheds affecting downstream water availability and thus impacting ecosystems and drinking water supplies under future climate change. …”
Get full text

Thermodynamic basis for the demarcation of Arctic and alpine treelines by Meredith Richardson Martin, Praveen Kumar, Oliver Sonnentag, Philip Marsh

“…Meteorological data from the Italian Alps, United States Rocky Mountains, and Western Canadian Taiga-Tundra are used as forcing for model computation of ecosystem work and temperature gradients at sites on both sides of each treeline with and without trees. …”
Get full text

The effects of late Cenozoic climate change on the global distribution of frost cracking by H. Sharma, S. G. Mutz, T. A. Ehlers

“…Results indicate for all paleoclimate time slices that frost cracking was most prevalent (relative to PI times) in the middle- to high-latitude regions, as well as high-elevation lower-latitude areas such the Himalayas, Tibet, the European Alps, the Japanese Alps, the US Rocky Mountains, and the Andes Mountains. The smallest deviations in frost cracking (relative to PI conditions) were observed in the MH simulation, which yielded slightly higher FCI values in most of the areas. …”
Get full text

Evidence for accelerated weathering and sulfate export in high alpine environments by John T Crawford, Eve-Lyn S Hinckley, M Iggy Litaor, Janice Brahney, Jason C Neff

“…This trend has occurred over the past 30 years and is consistent across multiple sites in the Rocky Mountains of the United States, western Canada, the European Alps, the Icelandic Shield, and the Himalayas in Asia. …”
Get full text

Evolution of Diagnostic Tests for Chronic Wasting Disease, a Naturally Occurring Prion Disease of Cervids by Nicholas J. Haley, Jürgen A. Richt

“…Since chronic wasting disease (CWD) was first identified nearly 50 years ago in a captive mule deer herd in the Rocky Mountains of the United States, it has slowly spread across North America through the natural and anthropogenic movement of cervids and their carcasses. …”
Get full text

Bias-corrected estimates of glacier thickness in the Columbia River Basin, Canada by Ben M. Pelto, Fabien Maussion, Brian Menounos, Valentina Radić, Maurice Zeuner

“…Our radar surveys, when combined with previous surveys for two glaciers in the Rocky Mountains, total 182 km of transects that represent 34 672 point measurements of ice thickness. …”
Get full text

Focusing Fluids in Faults: Evidence From Stable Isotopic Studies of Dated Clay‐Rich Fault Gouge of the Alberta Rockies by E. A. Lynch, D. Pană, B. A. van derPluijm

“…Abstract Isotopic studies of Canadian Rocky Mountain thrust faults preserve the timing and identity of orogenic fluids and their fault zone pathways. …”
Get full text

Evidence for Stress Localization Caused by Lithospheric Heterogeneity From Seismic Attenuation by Zhao Zhu, Maximiliano J. Bezada, Joseph S. Byrnes, Heather A. Ford

“…The easternmost surface expression of this orogeny ‐ the Black Hills in South Dakota ‐ is separated from the main trend of the Rocky Mountains by the southern half of the Powder River Basin, which we refer to as the Thunder Basin. …”
Get full text

Glacial Melt in the Canadian Rockies and Potential Effects on Groundwater in the Plains Region by Alfonso Rivera, Angus I. Calderhead

“…The prevailing concern in the Western Canadian Plains is that glaciers from the eastern Canadian Rocky Mountains (CRM) are losing mass, thus affecting groundwater recharge in the Plains. …”
Get full text

Future humidity trends over the western United States in the CMIP5 global climate models and variable infiltration capacity hydrological modeling system by D. W. Pierce, A. L. Westerling, J. Oyler

“…It could also increase the probability of large fires in the northern and central US Rocky Mountains by 13 to 60%.…”
Get full text

Molecular analyses on host-seeking black flies (Diptera: Simuliidae) reveal a diverse assemblage of Leucocytozoon (Apicomplexa: Haemospororida) parasites in an alpine ecosystem by Courtney C. Murdock, Peter H. Adler, Jared Frank, Susan L. Perkins

“…Methods We sampled abundant, ornithophilic black flies (Simuliidae) across a variety of sites and habitats in the Colorado Rocky Mountains throughout the summer of 2007. Black flies were screened with PCR using Leucocytozoon-specific primers that amplify a portion of the cytochrome b gene, and the sequences were compared to the haplotypes in the MalAvi database. …”
Get full text

Seasonal and Ephemeral Snowpacks of the Conterminous United States by Benjamin J. Hatchett

“…Ephemeral snowpacks exist throughout lower elevation regions of the western U.S. and across a broad longitudinal swath centered near 35° N spanning the lee of the Rocky Mountains to the Atlantic coast. Because it lacks a depth constraint, the SSM approach may inform the location of shallow but long-duration snowpacks at risk of transitioning to ephemeral snowpacks with climatic change. …”
Get full text

Assisted colonization of a regionally native predator impacts benthic invertebrates in fishless mountain lakes by Allison L. K. Banting, Mark K. Taylor, Rolf D. Vinebrooke, Chris M. Carli, Mark S. Poesch

“…This study compared littoral benthic invertebrate richness, diversity, community structure and abundance between three groups of lakes (fishless, native trout, nonnative trout) in the Canadian Rocky Mountains. While richness and diversity were preserved across all lake groups, other lines of evidence suggested that the introduction of native westslope cutthroat trout into fishless lakes can alter littoral benthic invertebrate communities in similar ways as nonnative brook trout (Salvelinus fontinalis). …”
Get full text

Heatwaves Similar to the Unprecedented One in Summer 2021 Over Western North America Are Projected to Become More Frequent in a Warmer World by Zizhen Dong, Lin Wang, Peiqiang Xu, Jie Cao, Ruowen Yang

“…Nevertheless, some heatwave records west of the Rocky Mountains are still difficult to break, highlighting the specific extremity of the 2021 WNA heatwave.…”
Get full text

Persistence of stratospheric ozone layers in the troposphere by Bithell, M, Vaughan, G, Gray, L

“…The upper layer seems to have originated over the Western USA where the trajectories passed through a region of low Richardson number above the Rocky Mountains. In both cases, the low-water-vapour/high-ozone air mass had been advected with little mixing in the troposphere for at least 10 days. …”

Rain events and recharge processes in the San Luis Valley of Southern Colorado by Lanzoni, M

“…Much of the groundwater in the American West relies on precipitation formed in the Rocky Mountains. Understanding how snowmelt-driven recharge may change over time is an important component to sustainably managing these groundwater resources. …”