Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR029395 |
Investigating the Relationship Between Peak Snow‐Water Equivalent and Snow Timing Indices in the Western U.S. and Alaska | |
A. Heldmyer; B. Livneh; N. Molotch; B. Rajagopalan | |
2021-04-25 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Understanding the distribution of snow water equivalent (SWE) is crucial for the prediction of water resources in the western United States. Backwards‐running SWE reconstructions use satellite‐observed, binary snow presence imagery to reconstruct SWE mass estimates. This approach relies on the connection between snow timing and peak SWE, yet few studies have directly examined this relationship. Here, we investigate the strength and spatiotemporal variation in this relationship across the western U.S. and Alaska. Within the SNOTEL network (n = 611 sites), we find that most variance in peak SWE is explained (median R2 = 0.64, σ = 0.18) by, in order of explanatory skill, the timing of snow disappearance, onset, and cover duration, with variation in skill primarily related to climate conditions—like winter storm size and storm frequency—rather than topographical setting. We expand this analysis with a diagnostic model of peak SWE driven by remotely sensed snow timing indices applied to five hydrologically important regions in the western U.S. and Alaska. Uncertainties arising from blending point‐ and 500 m grid‐scale observations were found to influence model SWE bias, but a robust correlation (median R = 0.88) with observations persisted across all tested thresholds. Overall, this supports the viability of snow timing information for quantifying spatial patterns of peak SWE (mean R2 = 0.76, percent bias = 3.6%) over the past two decades. These findings carry important implications for the development of SWE reanalysis products and for the evaluation of climate and hydrologic models. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/324007 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | A. Heldmyer,B. Livneh,N. Molotch,等. Investigating the Relationship Between Peak Snow‐Water Equivalent and Snow Timing Indices in the Western U.S. and Alaska[J]. Water Resources Research,2021. |
APA | A. Heldmyer,B. Livneh,N. Molotch,&B. Rajagopalan.(2021).Investigating the Relationship Between Peak Snow‐Water Equivalent and Snow Timing Indices in the Western U.S. and Alaska.Water Resources Research. |
MLA | A. Heldmyer,et al."Investigating the Relationship Between Peak Snow‐Water Equivalent and Snow Timing Indices in the Western U.S. and Alaska".Water Resources Research (2021). |
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