FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4229551505> ?p ?o ?g. }

• W4229551505 abstract "Abstract. Cosmogenic exposure dating provides a method for estimating the ages of glacial moraines deposited in the last ~105 years. Cosmic rays break atoms in surface rocks at predictable rates. Thus, the ages of moraines are directly related to the concentrations of cosmic ray-produced nuclides in rocks on the moraine surfaces, under ideal circumstances. However, many geomorphic processes may interfere with cosmogenic exposure dating. Because of these processes, boulders sometimes arrive at the moraines with preexisting concentrations of cosmogenic nuclides, or else the boulders are partly shielded from cosmic rays following deposition. Many methods for estimating moraine ages from cosmogenic exposure dates exist in the literature, but we cannot assess the appropriateness of these methods without knowing the parent distribution from which the dates were drawn on each moraine. Here, we make two contributions. First, we describe numerical models of two geomorphic processes, moraine degradation and inheritance, and their effects on cosmogenic exposure dating. Second, we assess the robustness of various simple methods for estimating the ages of moraines from collections of cosmogenic exposure dates. Our models estimate the probability distributions of cosmogenic exposure dates that we would obtain from moraine boulders with specified geomorphic histories, using Monte Carlo methods. We expand on pioneering modeling efforts to address this problem by placing these models into a common framework. We also evaluate the sensitivity of the models to changes in their input parameters. The sensitivity tests show that moraine degradation consistently produces left-skewed distributions of exposure dates; that is, the distributions have long tails toward the young end of the distribution. In contrast, inheritance produces right-skewed distributions that have long tails toward the old side of the distribution. Given representative distributions from these two models, we can determine which methods of estimating moraine ages are most successful in recovering the correct age for test cases where this value is known. The mean is a poor estimator of moraine age for data sets drawn from skewed parent distributions, and excluding outliers before calculating the mean does not improve this mismatch. The extreme estimators (youngest date and oldest date) perform well under specific circumstances, but fail in other cases. We suggest a simple estimator that uses the skewnesses of individual data sets to determine whether the youngest date, mean, or oldest date will provide the best estimate of moraine age. Although this method is perhaps the most globally robust of the estimators we tested, it sometimes fails spectacularly. The failure of simple methods to provide accurate estimates of moraine age points toward a need for more sophisticated statistical treatments. We present improved methods for estimating moraine ages in a companion paper." @default.
• W4229551505 created "2022-05-11" @default.
• W4229551505 creator A5008987835 @default.
• W4229551505 creator A5019011003 @default.
• W4229551505 creator A5032837897 @default.
• W4229551505 creator A5077042612 @default.
• W4229551505 date "2009-12-08" @default.
• W4229551505 modified "2023-10-17" @default.
• W4229551505 title "Modeling the statistical distributions of cosmogenic exposure dates from moraines" @default.
• W4229551505 cites W1530553435 @default.
• W4229551505 cites W1963732997 @default.
• W4229551505 cites W1965081522 @default.
• W4229551505 cites W1974096764 @default.
• W4229551505 cites W1974680878 @default.
• W4229551505 cites W1975350041 @default.
• W4229551505 cites W1976730890 @default.
• W4229551505 cites W1976894260 @default.
• W4229551505 cites W1995657353 @default.
• W4229551505 cites W1997594284 @default.
• W4229551505 cites W2002473398 @default.
• W4229551505 cites W2004587469 @default.
• W4229551505 cites W2005035365 @default.
• W4229551505 cites W2007917421 @default.
• W4229551505 cites W2017592109 @default.
• W4229551505 cites W2018023419 @default.
• W4229551505 cites W2023344243 @default.
• W4229551505 cites W2025802385 @default.
• W4229551505 cites W2033036927 @default.
• W4229551505 cites W2040052188 @default.
• W4229551505 cites W2041859946 @default.
• W4229551505 cites W2043459131 @default.
• W4229551505 cites W2047643658 @default.
• W4229551505 cites W2054707461 @default.
• W4229551505 cites W2059136742 @default.
• W4229551505 cites W2066218742 @default.
• W4229551505 cites W2066328397 @default.
• W4229551505 cites W2073318487 @default.
• W4229551505 cites W2077390302 @default.
• W4229551505 cites W2078878584 @default.
• W4229551505 cites W2080912283 @default.
• W4229551505 cites W2093866688 @default.
• W4229551505 cites W2097495478 @default.
• W4229551505 cites W2097796269 @default.
• W4229551505 cites W2111801219 @default.
• W4229551505 cites W2113159724 @default.
• W4229551505 cites W2126147651 @default.
• W4229551505 cites W2156958959 @default.
• W4229551505 cites W2168612292 @default.
• W4229551505 doi "https://doi.org/10.5194/gmdd-2-1407-2009" @default.
• W4229551505 hasPublicationYear "2009" @default.
• W4229551505 type Work @default.
• W4229551505 citedByCount "1" @default.
• W4229551505 crossrefType "posted-content" @default.
• W4229551505 hasAuthorship W4229551505A5008987835 @default.
• W4229551505 hasAuthorship W4229551505A5019011003 @default.
• W4229551505 hasAuthorship W4229551505A5032837897 @default.
• W4229551505 hasAuthorship W4229551505A5077042612 @default.
• W4229551505 hasBestOaLocation W42295515051 @default.
• W4229551505 hasConcept C100970517 @default.
• W4229551505 hasConcept C101140149 @default.
• W4229551505 hasConcept C111309251 @default.
• W4229551505 hasConcept C114793014 @default.
• W4229551505 hasConcept C121332964 @default.
• W4229551505 hasConcept C127313418 @default.
• W4229551505 hasConcept C15739521 @default.
• W4229551505 hasConcept C15785411 @default.
• W4229551505 hasConcept C177571023 @default.
• W4229551505 hasConcept C20116678 @default.
• W4229551505 hasConcept C205649164 @default.
• W4229551505 hasConcept C44870925 @default.
• W4229551505 hasConcept C62520636 @default.
• W4229551505 hasConceptScore W4229551505C100970517 @default.
• W4229551505 hasConceptScore W4229551505C101140149 @default.
• W4229551505 hasConceptScore W4229551505C111309251 @default.
• W4229551505 hasConceptScore W4229551505C114793014 @default.
• W4229551505 hasConceptScore W4229551505C121332964 @default.
• W4229551505 hasConceptScore W4229551505C127313418 @default.
• W4229551505 hasConceptScore W4229551505C15739521 @default.
• W4229551505 hasConceptScore W4229551505C15785411 @default.
• W4229551505 hasConceptScore W4229551505C177571023 @default.
• W4229551505 hasConceptScore W4229551505C20116678 @default.
• W4229551505 hasConceptScore W4229551505C205649164 @default.
• W4229551505 hasConceptScore W4229551505C44870925 @default.
• W4229551505 hasConceptScore W4229551505C62520636 @default.
• W4229551505 hasLocation W42295515051 @default.
• W4229551505 hasLocation W42295515052 @default.
• W4229551505 hasLocation W42295515053 @default.
• W4229551505 hasOpenAccess W4229551505 @default.
• W4229551505 hasPrimaryLocation W42295515051 @default.
• W4229551505 hasRelatedWork W100520259 @default.
• W4229551505 hasRelatedWork W17844954 @default.
• W4229551505 hasRelatedWork W19356051 @default.
• W4229551505 hasRelatedWork W20277813 @default.
• W4229551505 hasRelatedWork W20437517 @default.
• W4229551505 hasRelatedWork W30431315 @default.
• W4229551505 hasRelatedWork W39162722 @default.
• W4229551505 hasRelatedWork W43684826 @default.
• W4229551505 hasRelatedWork W61527671 @default.
• W4229551505 hasRelatedWork W72667319 @default.
• W4229551505 isParatext "false" @default.

• next