Exploring the Potential of Long Short‐Term Memory Networks for Improving Understanding of Continental‐ and Regional‐Scale Snowpack Dynamics DOI
Yuan‐Heng Wang, Hoshin V. Gupta, Xubin Zeng

et al.

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(3)

Published: March 1, 2022

Abstract Accurate estimation of the spatio‐temporal distribution snow water equivalent is essential given its global importance for understanding climate dynamics and change, as a source fresh water. Here, we explore potential using Long Short‐Term Memory (LSTM) network continental regional scale modeling daily accumulation melt at 4‐km pixel resolution across conterminous US (CONUS). To reduce training costs (data are available ∼0.31 million snowy pixels), combine spatial sampling with stagewise model development, whereby first pretrained entire CONUS then subjected to fine‐tuning. Accordingly, evaluation focused on out‐of‐sample predictive performance space (analogous prediction in ungauged basins problem). We find that, identical inputs (precipitation, temperature, elevation), single CONUS‐wide LSTM provides significantly better generalization than regionally calibrated version physical‐conceptual temperature‐index‐based SNOW17 model. Adding more meteorological information (dew point vapor pressure deficit, longwave radiation, shortwave radiation) further improves performance, while rendering redundant local provided by elevation. Overall, exhibits transferability locations that were not included data set, reinforcing advantages structure learning over parameter learning. Our results suggest an LSTM‐based approach could be used develop continental/global‐scale systems dynamics.

Language: Английский

A low-to-no snow future and its impacts on water resources in the western United States DOI
Erica R. Siirila‐Woodburn, Alan M. Rhoades, Benjamin J. Hatchett

et al.

Nature Reviews Earth & Environment, Journal Year: 2021, Volume and Issue: 2(11), P. 800 - 819

Published: Oct. 26, 2021

Language: Английский

Citations

302
Constraining the increased frequency of global precipitation extremes under warming DOI
Chad W. Thackeray, Alex Hall, Jesse Norris

et al.

Nature Climate Change, Journal Year: 2022, Volume and Issue: 12(5), P. 441 - 448

Published: April 14, 2022

Language: Английский

Citations

163
Widespread spring phenology effects on drought recovery of Northern Hemisphere ecosystems DOI Creative Commons
Yang Li, Wen Zhang, Christopher R. Schwalm

et al.

Nature Climate Change, Journal Year: 2023, Volume and Issue: 13(2), P. 182 - 188

Published: Jan. 19, 2023

Abstract The time required for an ecosystem to recover from severe drought is a key component of ecological resilience. phenology effects on recovery are, however, poorly understood. These centre how variations impact biophysical feedbacks, vegetation growth and, ultimately, itself. Using multiple remotely sensed datasets, we found that more than half ecosystems in mid- and high-latitudinal Northern Hemisphere failed extreme droughts within single growing season. Earlier spring the year slowed when occurred mid-growing Delayed subsequent all types (with importance ranging 46% 58%). were comparable or larger other well-known postdrought climatic factors. results strongly suggest interactions between must be incorporated into Earth system models accurately quantify

Language: Английский

Citations

108
Trends, Breaks, and Biases in the Frequency of Reported Glacier Lake Outburst Floods DOI
Georg Veh, Natalie Lützow,

Varvara Kharlamova

et al.

Earth s Future, Journal Year: 2022, Volume and Issue: 10(3)

Published: March 1, 2022

Abstract Thousands of glacier lakes have been forming behind natural dams in high mountains following retreat since the early 20th century. Some these abruptly released pulses water and sediment with disastrous downstream consequences. Yet it remains unclear whether reported rise lake outburst floods (GLOFs) has fueled by a warming atmosphere enhanced meltwater production, or simply growing research effort. Here we estimate trends biases GLOF reporting based on largest global catalog 1,997 dated glacier‐related six major mountain ranges from 1901 to 2017. We find that positive trend number GLOFs decayed distinctly after break 1970s, coinciding independently detected changes annual air temperatures field‐based surveys (a proxy scientific reporting). observe reports decelerated, while temperature accelerated past five decades. Enhanced alone can thus hardly explain GLOFs, suggesting temperature‐driven formation, growth, failure are weakly coupled, outbursts overlooked. Indeed, our analysis emphasizes distinct geographic temporal bias reporting, project between two four out average might gone unnoticed mid‐20th recommend such should be considered, better corrected for, when attributing frequency atmospheric warming.

Language: Английский

Citations

85
Environmental effects of stratospheric ozone depletion, UV radiation, and interactions with climate change: UNEP Environmental Effects Assessment Panel, Update 2021 DOI Creative Commons
Paul W. Barnes,

T. Matthew Robson,

Patrick J. Neale

et al.

Photochemical & Photobiological Sciences, Journal Year: 2022, Volume and Issue: 21(3), P. 275 - 301

Published: Feb. 21, 2022

Abstract The Environmental Effects Assessment Panel of the Montreal Protocol under United Nations Environment Programme evaluates effects on environment and human health that arise from changes in stratospheric ozone layer concomitant variations ultraviolet (UV) radiation at Earth’s surface. current update is based scientific advances have accumulated since our last assessment (Photochem Photobiol Sci 20(1):1–67, 2021). We also discuss how climate change affects depletion radiation, change. resulting interlinking depletion, UV are assessed terms air quality, carbon sinks, ecosystems, health, natural synthetic materials. further highlight potential impacts biosphere extreme events occurring with increasing frequency as a consequence These other interactive examined respect to benefits its Amendments providing life Earth by controlling production various substances contribute both

Language: Английский

Citations

78
Interactive effects of changes in UV radiation and climate on terrestrial ecosystems, biogeochemical cycles, and feedbacks to the climate system DOI Creative Commons
Paul W. Barnes,

T. Matthew Robson,

Richard G. Zepp

et al.

Photochemical & Photobiological Sciences, Journal Year: 2023, Volume and Issue: 22(5), P. 1049 - 1091

Published: Feb. 1, 2023

Terrestrial organisms and ecosystems are being exposed to new rapidly changing combinations of solar UV radiation other environmental factors because ongoing changes in stratospheric ozone climate. In this Quadrennial Assessment, we examine the interactive effects ozone, climate on terrestrial biogeochemical cycles context Montreal Protocol. We specifically assess organisms, agriculture food supply, biodiversity, ecosystem services feedbacks system. Emphasis is placed role extreme events altering exposure potential biodiversity. also address responses plants increased temporal variability radiation, change (e.g. drought, temperature) crops, driving breakdown organic matter from dead plant material (i.e. litter) biocides (pesticides herbicides). Our assessment indicates that interact various ways affect structure function ecosystems, by protecting layer, Protocol continues play a vital maintaining healthy, diverse land sustain life Earth. Furthermore, its Kigali Amendment mitigating some negative consequences limiting emissions greenhouse gases carbon sequestration vegetation pool.

Language: Английский

Citations

65
Recent decreases in snow water storage in western North America DOI Creative Commons
K. Hale, Keith S. Jennings, K. N. Musselman

et al.

Communications Earth & Environment, Journal Year: 2023, Volume and Issue: 4(1)

Published: May 22, 2023

Abstract Mountain snowpacks act as natural water towers, storing winter precipitation until summer months when downstream demand is greatest. We introduce a Snow Storage Index (SSI), representing the temporal phase difference between daily and surface inputs—sum of rainfall snowmelt into terrestrial systems—weighted by relative magnitudes. Different from snow equivalent or fraction, SSI represents degree to which snowpack delays timing magnitude inputs precipitation, fundamental component how storage influences hydrologic cycle. In western North America, annual has decreased ( p < 0.05) 1950–2013 in over 25% mountainous areas, result substantially earlier spring months, with additional declines precipitation. The associated trends offer new perspective on sensitivity climate change have broad implications for resources ecosystems.

Language: Английский

Citations

47
Streamflow seasonality in a snow-dwindling world DOI
Juntai Han, Ziwei Liu, Ross Woods

et al.

Nature, Journal Year: 2024, Volume and Issue: 629(8014), P. 1075 - 1081

Published: May 29, 2024

Language: Английский

Citations

38
Changes in Snow Drought and the Impacts on Streamflow Across Northern Catchments DOI Creative Commons
Juntai Han, Yuting Yang, Yuhan Guo

et al.

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(1)

Published: Jan. 1, 2025

Abstract Snow drought, characterized by an anomalous reduction in snowpack, exerts profound hydrological and socioeconomic impacts cold regions. Despite its significance, the influence of diverse snow drought types, including warm, dry, warm‐and‐dry variants, on streamflow remains inadequately understood. Here we present first hemispheric‐scale, observation‐based assessment patterns seasonal annual ( Q ) across 3049 northern catchments over 1950–2020. Our findings reveal that with a lower mean snowfall fraction () exhibit heightened prevalence severity warm droughts, whereas high‐ experience more prevalent but less severe dry drought. This disparity arises from distinct sensitivities snowpack to cold‐season precipitation temperature. In addition, droughts induce during both seasons, culminating significant decrease . Conversely, increases decreases , attributable trade‐off between increased c decreased warm‐season w ). With ongoing climate warming, continued is anticipated, which expected further increase frequency warm‐dry droughts. These circumstances, particularly impactful under low conditions, are poised formidable challenges for water resources management regions globally.

Language: Английский

Citations

2
Development of a fine-resolution snow depth product based on the snow cover probability for the Tibetan Plateau: Validation and spatial–temporal analyses DOI
Dajiang Yan, Ning Ma, Yinsheng Zhang

et al.

Journal of Hydrology, Journal Year: 2021, Volume and Issue: 604, P. 127027 - 127027

Published: Oct. 4, 2021

Language: Английский

Citations

69