Trying to Get Us to Change Course

Holt, Rush

doi:10.1126/science.1142810

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…Altogether, the glaciers of Alaska and Northwestern Canada (hereafter called Alaska glaciers for brevity) are shedding mass due to climate change at one of the highest rates of any mountain glacier system (Arendt and others, 2002; Meier and others, 2007; Berthier and others, 2010; Wu and others, 2010; Jacob and others, 2012; Sasgen and others, 2012; Arendt and others, 2013; Gardner and others, 2013; Larsen and others, 2015), with global and regional consequences. At the global scale, between 2003 and 2009, Alaska glaciers contributed an estimated 20% of the mean sea-level rise from mountain glacier mass loss, including the Greenland and Antarctic peripheries but excluding the ice sheets themselves (Arendt and others, 2013; Gardner and others, 2013).…”

Section: Introductionmentioning

confidence: 99%

The challenge of monitoring glaciers with extreme altitudinal range: mass-balance reconstruction for Kahiltna Glacier, Alaska

et al. 2018

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ABSTRACT. Glaciers spanning large altitudinal ranges often experience different climatic regimes with elevation, creating challenges in acquiring mass-balance and climate observations that represent the entire glacier. We use mixed methods to reconstruct the 1991-2014 mass balance of the Kahiltna Glacier in Alaska, a large (503 km 2 ) glacier with one of the greatest elevation ranges globally (264-6108 m a.s.l.). We calibrate an enhanced temperature index model to glacier-wide mass balances from repeat laser altimetry and point observations, finding a mean net mass-balance rate of −0.74 mw.e. a −1 ( ± σ = 0.04, std dev. of the best-performing model simulations). Results are validated against mass changes from NASA's Gravity Recovery and Climate Experiment (GRACE) satellites, a novel approach at the individual glacier scale. Correlation is strong between the detrended modeland GRACE-derived mass change time series (R 2 = 0.58 and p ≪ 0.001), and between summer (R 2 = 0.69 and p = 0.003) and annual (R 2 = 0.63 and p = 0.006) balances, lending greater confidence to our modeling results. We find poor correlation, however, between modeled glacier-wide balances and recent single-stake monitoring. Finally, we make recommendations for monitoring glaciers with extreme altitudinal ranges, including characterizing precipitation via snow radar profiling.

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Section: Introductionmentioning

confidence: 99%

The challenge of monitoring glaciers with extreme altitudinal range: mass-balance reconstruction for Kahiltna Glacier, Alaska

et al. 2018

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Ecocinema and Ecological Value

Sinnerbrink¹

2022

A Companion to Motion Pictures and Public Value

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Environmental Reviews & Case Studies: Keeping below the Tipping Point: A Literature Review of Climate Change with Attention to NEPA

Draper¹

2010

Environmental Practice

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The courts are increasingly finding that National Environmental Policy Act (NEPA) documents need to address climate change impacts-both the impact of the project on climate change and the impacts of climate change on the project. In the scientific arena, the year 2007 was pivotal in climate change because the Fourth Assessment Report of the United Nations Intergovernmental Panel on Climate Change (IPCC) was issued. The IPCC report concluded that warming of the climate system is unequivocal and that this warming is primarily caused by increases in greenhouse gas concentrations. To address the issue and its impacts on a given project, policy, or program for a NEPA review, the analyst is presented with the difficulty of summarizing a massive amount of literature from the earth, biological, and physical sciences. This article provides a summary of the recent literature, addressing the IPCC report, the evidence for climate change, effects in different regions, NEPA implications, and mitigation strategies. NEPA reviews in the area of infrastructure in coastal regions and in the area of water supply will need special attention in light of climate change. All of this will make for much decision making under uncertainty, but ultimately NEPA documents and environmental decisions are likely to benefit from consideration of climate change because more resilient projects are likely to be approved, even if climate change is not as intense as some estimates. This article emphasizes NEPArelevant events and is not intended to provide details on the current regulatory framework under other laws. Environmental Practice 12: 144-157 (2010)

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Trying to Get Us to Change Course

Cited by 6 publications

References 2 publications

The challenge of monitoring glaciers with extreme altitudinal range: mass-balance reconstruction for Kahiltna Glacier, Alaska

The challenge of monitoring glaciers with extreme altitudinal range: mass-balance reconstruction for Kahiltna Glacier, Alaska

Ecocinema and Ecological Value

Environmental Reviews & Case Studies: Keeping below the Tipping Point: A Literature Review of Climate Change with Attention to NEPA

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