A statistical evaluation of the origin of cypress domes in Florida

Raines, Eron

doi:10.1016/j.geomorph.2020.107161

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…We examined the complementary cumulative distribution function (CCDF) of depression areas. Distinguishing power‐law distributions from other heavy‐tailed distributions is non‐trivial (Avnir et al., 1998; Clauset et al., 2009; Newman, 2005; Voitalov et al., 2019) and has led to controversy (Corral & González, 2019; Dong et al., 2019; Raines, 2020; Stumpf & Porter, 2012). Crucially, commonly applied hypothesis testing methods (e.g., R 2 , KS‐tests) are statistically invalid for identifying power‐law distributions (Newman, 2005; Voitalov et al., 2019).…”

Section: Methodsmentioning

confidence: 99%

“…Analyses of size distributions and geometric scaling relationships have proven useful for revealing the origins of depressions in karst landscapes (Pardo‐Igúzquiza et al., 2018; Raines, 2020). Karst bedrock dissolution is a positive feedback process that can produce power‐law size distributions of sinkholes (Pardo‐Igúzquiza et al., 2020; Yizhaq et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Englacial Drainage Drives Positive Feedback Depression Growth on the Debris‐Covered Ngozumpa Glacier, Nepal

Strickland,

Covington,

Gulley

et al. 2023

Geophysical Research Letters

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The development of hummocky topography is a poorly understood aspect of down‐wasting on debris‐covered glaciers that is often attributed to variable debris thickness. Thousands of enclosed depressions pit the hummocky topography. To better understand depression growth, we examined the size distribution and geometry of depressions on the Ngozumpa Glacier, in the Everest Region of Nepal. The depressions exhibited a power‐law size distribution, fractal perimeters, and power‐law depth‐area scaling, which suggest positive feedback growth. With a simple model, we showed that positive feedback growth produces similar power‐law size distributions. Based on these findings, we propose a “sinkhole” hypothesis for the development of depressions. Drainage into englacial sink points removes debris from the depressions and inhibits ponds from overflowing, thereby enabling positive feedback growth via incision, increased sub‐debris melt rates, and ice cliff retreat. By facilitating sustained depression growth, englacial drainage preconditions the ablation zone for the rapid growth of glacial lakes.

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