Historical Occurrence of and Shift in Snow Drought Drivers in Global Mountain Ranges DOI Open Access
Rebecca Gustine, Christine Lee,

Yonas Demissie

et al.

Authorea (Authorea), Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 16, 2023

Snow droughts are a new way to understand changes in snowpack and subsequent runoff. Globally, we do not have good understanding of the drivers snow or how those changed historically. Here, identify what has been dominant driver global mountain ranges, it shifted historically, similarities exist similar types. We explore this all ones that highly dependent on winter precipitation for summer water, two regional case studies Cascade Range Himalayan Mountains. found both northern southern hemispheres, dry (driven by precipitation) most common. In hemisphere, more ranges having temperature be main historical record. tundra, boreal, prairie, ice type areas had area with droughts. types except tundra as With global, multivariate methodology, were able common patterns across geographical (i.e., hemisphere ranges) areas. More research is needed better droughts, their drivers, risk they pose regionally food water security.

Language: Английский

Increasing prevalence of hot drought across western North America since the 16th century DOI Creative Commons
Karen E. King, Edward R. Cook, Kevin J. Anchukaitis

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(4)

Published: Jan. 24, 2024

Across western North America (WNA), 20th-21st century anthropogenic warming has increased the prevalence and severity of concurrent drought heat events, also termed hot droughts. However, lack independent spatial reconstructions both soil moisture temperature limits potential to identify these events in past place them a long-term context. We develop Western American Temperature Atlas (WNATA), data-independent 0.5° gridded reconstruction summer maximum temperatures back 16th century. Our evaluation WNATA with existing hydroclimate reveals an increasing association between recent decades, relative five centuries. The synthesis paleo-reconstructions indicates that amplification modern WNA megadrought by frequency extent compound dry conditions 21st are likely unprecedented since at least

Language: Английский

Citations

21
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
A Watershed Moment for Western U.S. Dams DOI Creative Commons
Amy E. East, Gordon E. Grant

Water Resources Research, Journal Year: 2023, Volume and Issue: 59(10)

Published: Oct. 1, 2023

Abstract The summer of 2023 is a notable time for water‐resource management in the western United States: Glen Canyon Dam, on Colorado River, turns 60 years old while largest dam‐removal project history beginning Klamath River. This commentary discusses these events context changing paradigm dam and reservoir this region. Since era large building began to wane six decades ago, new challenges have arisen owing climate change, population increase, sedimentation, declining safety aging dams, more environmentally focused objectives. Today we also better understand dams' benefits, costs, environmental impacts, including some that were unforeseen took become apparent. Where dams unsafe, obsolete (e.g., due excessive sedimentation), uneconomical beyond saving, removal has common. science practice are accelerating rapidly, long‐term physical biological response studies now available. Removal four hydroelectric River will be larger complex than any previous removal. imminency reflects very different situation ago. Looking forward, States worldwide require continued collaboration innovative thinking meet wide range objectives manage water resources sustainably future generations.

Language: Английский

Citations

11
Patterns of Snow Drought Under Climate Change: From Dry to Warm Dominance DOI Creative Commons
Chuan Wang, Zhi Li, Nicolas Guyennon

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(8)

Published: April 11, 2025

Abstract Global warming may trigger more frequent snow droughts (SD). SD can result from low total precipitation (dry‐SD), high temperatures leading to less solid (warm‐SD), or a combination of both (dry‐warm compound SD). Those three types threaten ecosystems differently. Nevertheless, the regions dominated by types, transition patterns, and future risks under climate change remain unclear. We investigated dominance their patterns across historical periods. By 2100, compared 1981, results project global increases in frequency than 3‐fold 4‐fold SSP2‐4.5 SSP5‐8.5 scenarios, respectively. Moreover, share warm is increasing projected account for 65% 2050. Compared period, probabilities dry‐warm period expected increase 3.7 6.6 times,

Language: Английский

Citations

0
Networks of Tree‐Ring Based Streamflow Reconstructions for the Pacific Northwest, U.S.A. DOI
Jeremy S. Littell, Gregory T. Pederson, Justin T. Martin

et al.

Water Resources Research, Journal Year: 2023, Volume and Issue: 59(11)

Published: Oct. 31, 2023

Abstract Water resources in the Pacific Northwest (PNW) are characterized by significant interannual to interdecadal variation. Paleo‐proxy reconstructions such as those derived from tree‐rings provide longer‐term context and supplement information on this expected range of variability, which can improve planning, management, response related extreme events hydrologic change. However, existing paleo‐proxy have yet address potential for pronounced within‐ among‐basin variations PNW due a lack spatial coverage. Here we develop methodologically consistent 36 gages PNW, including Columbia Snake River drainages, well key coastal watersheds. These extend back at least 1500s coefficient efficiency. Reconstruction skill is relatively high (mean R 2 = 0.63), snowpack‐ or winter precipitation‐sensitive chronologies high‐elevation sites important contributions reconstruction skill. At whole‐region scale, reconstructed variability indicates evidence drier wetter years, more persistent decadal correspondingly longer episodes deficit surplus compared instrumental records. Within region, expanded extremes appears especially prevalent southern Regionally, cumulative deficits early mid 1600s rival 20 th century, though persistence timing vary widely among basins. suggest that considering within‐region will be water management planning under climate change, sub‐regional adaptation strategies likely advantageous.

Language: Английский

Citations

1
Historical Occurrence of and Shift in Snow Drought Drivers in Global Mountain Ranges DOI Open Access
Rebecca Gustine, Christine Lee,

Yonas Demissie

et al.

Authorea (Authorea), Journal Year: 2023, Volume and Issue: unknown

Published: Nov. 16, 2023

Snow droughts are a new way to understand changes in snowpack and subsequent runoff. Globally, we do not have good understanding of the drivers snow or how those changed historically. Here, identify what has been dominant driver global mountain ranges, it shifted historically, similarities exist similar types. We explore this all ones that highly dependent on winter precipitation for summer water, two regional case studies Cascade Range Himalayan Mountains. found both northern southern hemispheres, dry (driven by precipitation) most common. In hemisphere, more ranges having temperature be main historical record. tundra, boreal, prairie, ice type areas had area with droughts. types except tundra as With global, multivariate methodology, were able common patterns across geographical (i.e., hemisphere ranges) areas. More research is needed better droughts, their drivers, risk they pose regionally food water security.

Language: Английский

Citations

0