<scp>cR</scp>acle: R tools for estimating climate from vegetation

Harbert, Robert S.; Baryiames, Alex A.

doi:10.1002/aps3.11322

Cited by 10 publications

(2 citation statements)

References 27 publications

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“…Three techniques have been applied to reconstruct terrestrial paleoclimates of the Neogene from the UK. The widely utilized Co‐existence Approach is compared to two distinct statistical techniques: CREST(Climate REconstruction SofTware; Chevalier et al., 2014) and CRACLE (Climate Reconstruction using Coexistence Likelihood Estimation; Harbert & Baryiames, 2020; Harbert & Nixon, 2015). The aim is to better capture uncertainties in terrestrial climate reconstructions.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, in this study we focus on the results of N-CRACLE to accommodate for this. For more detail on the method, see Harbert and Nixon (2015) and the "cRacle" package is explained in detail in Harbert and Baryiames (2020). Original documentation of the "cRacle" R code is available with the package code (https://github.com/rsh249/cRacle).…”

Section: Reconstruction Technique Descriptionsmentioning

confidence: 99%

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Reconstructing Terrestrial Paleoclimates: A Comparison of the Co‐Existence Approach, Bayesian and Probability Reconstruction Techniques Using the UK Neogene

Gibson

McCoy

O’Keefe

et al. 2022

Paleoceanog and Paleoclimatol

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Little is known about the development of the modern oceanic climate regime of northwest Europe in deep time. During the Neogene (23.03-2.588 Ma), the British Isles had a unique location on the northwest edge of the Eurasian continent forming a peninsula separating the Atlantic Ocean from the North Sea (Harzhauser & Piller, 2007). Neogene sediments of the UK are therefore ideal for understanding the development of Neogene oceanic climates.The modern European climate experiences a prevalence of the westerlies in winter with summer climates being highly latitudinally diverse. Western coastal areas, such as the UK, experience an oceanic, or maritime, climate with highly latitudinally diverse summer climates relative to southern Europe with its Mediterranean climate and dry summers and the subhumid-semi-arid continental climate of eastern Europe (Rohli & Vega, 2008;Vines, 1985). However, during the late Middle Miocene (Serravallian, 13.82-11.62 Ma) summer precipitation patterns suggest Europe was instead dominated by a trade wind system flowing from the northeast to southwest, whilst the Late Miocene was controlled by the westerlies (Böhme, 2004;Quan et al., 2014). However, much of this work is based upon the central European basins and does not, potentially, reflect terrestrial environments with a strong oceanic control. In addition, the majority of terrestrial paleoclimate reconstructions are generated through the Co-existence Approach (Burls et al., 2021;Utescher et al., 2014). Whilst this has given us unprecedented understanding of terrestrial climate development (e.g., Utescher et al., 2017), the reconstruction of a Abstract Neogene sediments in the UK are ideally situated for understanding the early development of hydrological dynamics and atmospheric circulation that led to the modern oceanic climate of northwest Europe. Onshore Neogene fossiliferous deposits in the UK are limited to the solution pipe fills at Trwyn y Parc in Anglesey (Middle Miocene), the Brassington Formation of Derbyshire (Serravallian-Tortonian), and the Coralline Crag Formation (latest Zanclean-earliest Piacenzian) and Red Crag Formation (Piacenzian-Gelasian) in southeast England. Palynoflora from these localities can be used to provide snapshots into the climate at the time of deposition, however, palaeobotanical-based reconstructions are typically lacking in their poor estimation of error. Therefore, we present the first pre-Quaternary application of two terrestrial climate reconstruction techniques: CREST (Climate Reconstruction SofTware) and CRACLE (Climate Reconstruction Analysis using Coexistence Likelihood Estimation), that use Bayesian and likelihood estimation probability respectively to generate a new palaeoclimate reconstruction, and compare this to Co-existence Approach reconstructions from the UK and continental Europe. Our study shows how Mean Annual Temperature (MAT) declines by 3°-6°C, Mean Annual Precipitation (MAP) declines by 480-600 mm and Precipitation Seasonality approximately halves throughout the Neogene. CREST and ...

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Section: Methodsmentioning

confidence: 99%

Section: Reconstruction Technique Descriptionsmentioning

confidence: 99%

Reconstructing Terrestrial Paleoclimates: A Comparison of the Co‐Existence Approach, Bayesian and Probability Reconstruction Techniques Using the UK Neogene

Gibson

McCoy

O’Keefe

et al. 2022

Paleoceanog and Paleoclimatol

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Plant–environment interactions from the lens of plant stress, reproduction, and mutualisms

Baucom

Heath

Chambers

2020

American J of Botany

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The evolutionary processes that take place in invasive plant populations are not well documented or understood. Interspecific hybridization between cultivated radish (Raphanus sativus) and R. raphanistrum is known to be responsible for the origin of the invasive California wild radish, but little is known about the nature of the hybridization events that produced the hybrid‐derived lineage. We analyzed the trnL‐rpl32 intergenic region of chloroplast DNA (cpDNA) obtained from 37 cultivated radish individuals from four different cultivars, 53 R. raphanistrum individuals from six European populations and 104 California wild radish individuals from 11 populations covering its entire range throughout the state. We found that cultivated radish and R. raphanistrum shared no cpDNA haplotypes but that they both shared haplotypes with California wild radish, evidence for bidirectional hybridization between the progenitor species in the creation of the California lineage. We also found evidence that multiple cultivars and multiple European source populations contributed to the diversity of cpDNA haplotypes within California. Studies like this will continue to be important for our understanding of the origin of invasive populations and the mechanisms by which they succeed.

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Novel methodologies to disentangle plant–environment interactions

Chambers

2020

Appl Plant Sci

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cRacle: R tools for estimating climate from vegetation

Cited by 10 publications

References 27 publications

Reconstructing Terrestrial Paleoclimates: A Comparison of the Co‐Existence Approach, Bayesian and Probability Reconstruction Techniques Using the UK Neogene

Reconstructing Terrestrial Paleoclimates: A Comparison of the Co‐Existence Approach, Bayesian and Probability Reconstruction Techniques Using the UK Neogene

Plant–environment interactions from the lens of plant stress, reproduction, and mutualisms

Novel methodologies to disentangle plant–environment interactions

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