edu.ucar.opensky::articles:26757 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:00:44.426775 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7qv3rk4 https://doi.org/10.17190/AMF/1804491 https Related Dataset #1 AmeriFlux AmeriFlux US-NR3 Niwot Ridge Alpine (T-Van West) https://doi.org/10.17190/AMF/1804492 https Related Dataset #2 AmeriFlux AmeriFlux US-NR4 Niwot Ridge Alpine (T-Van East) https://doi.org/10.5065/pc9m-jx04 https Related Dataset #3 Single-point CLM simulations with hillslope hydrology at Niwot Ridge, CO https://doi.org/10.6073/pasta/285918fbf5cc4bd2ed2c1241db9a1b2d https Related Dataset #4 Time-lapse camera (phenocam) imagery of sensor network plots, 2017 - ongoing. https://doi.org/10.6073/pasta/598894834ea3bae61d7550c30da06565 https Related Dataset #5 Climate data for saddle catchment sensor network, 2017 - ongoing. https://doi.org/10.6073/pasta/a4f57c82ad274aa2640e0a79649290ca https Related Dataset #6 5cm multispectral imagery from UAV campaign at Niwot Ridge, 2017 https://doi.org/10.6073/pasta/a6a30132f9d4e2d9a0763e7a7faef619 https Related Dataset #7 Snow depth data for saddle snowfence, 1992 - ongoing. https://doi.org/10.6073/pasta/b0cdc0cf7c4442f1b2ffc569e9890968 https Related Dataset #8 Aboveground net primary productivity data for Saddle grid, 1992 - ongoing. https://doi.org/10.5281/zenodo.3739617 https Related Software #1 ESCOMP/CTSM: CTSM 5.3: New surface datasets, git-fleximod intro, Leung dust, explicit AC, Matrix-CN, FATES transient LU, time/history metadata changes https://doi.org/10.5281/zenodo.8083490 https Related Software #2 katyarjay/NWT_CLM_Hillslope: Topographic Heterogeneity and Aspect Moderate Exposure to Climate Change Across an Alpine Tundra Hillslope https://doi.org/10.5281/zenodo.8083491 https Related Software #3 katyarjay/NWT_CLM_Hillslope: Topographic Heterogeneity and Aspect Moderate Exposure to Climate Change Across an Alpine Tundra Hillslope Topographic heterogeneity and aspect moderate exposure to climate change across an alpine tundra hillslope 2023-11-27T00:00:00Z publication https://n2t.org/ark:/85065/d7qv3rk4 https://doi.org/10.1029/2023JG007664 Jay, K. R. author Wieder, William author Swenson, Sean author Knowles, J. F. author Elmendorf, S. C. author Holland-Moritz, H. author Suding, K. N. author UCAR/NCAR - Library publisher Alpine tundra ecosystems are highly vulnerable to climate warming but are governed by local-scale abiotic heterogeneity, which makes it difficult to predict tundra responses to environmental change. Although land models are typically implemented at global scales, they can be applied at local scales to address process-based ecological questions. In this study, we ran ecosystem-scale Community Land Model (CLM) simulations with a novel hillslope hydrology configuration to represent topographically heterogeneous alpine tundra vegetation across a moisture gradient at Niwot Ridge, Colorado, USA. We used local observations to evaluate our simulations and investigated the role of topography and aspect in mediating patterns of snow, productivity, soil moisture, and soil temperature, as well as the potential exposure to climate change across an alpine tundra hillslope. Overall, our simulations captured observed gradients in abiotic conditions and productivity among heterogeneous, hydrologically connected vegetation communities (moist, wet, and dry). We found that south facing aspects were characterized by reduced snowpack and drier and warmer soils in all communities. When we extended our simulations to the year 2100, we found that earlier snowmelt altered the timing of runoff, with cascading effects on soil moisture, productivity, and growing season length. However, these effects were not distributed equally across the tundra, highlighting potential vulnerabilities of alpine vegetation in dry, wind-scoured, and south facing areas. Overall, our results demonstrate how land model outputs can be applied to advance process-based understanding of climate change impacts on ecosystem function. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2023 American Geophysical Union (AGU). None eng geoscientificInformation