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Climate Leaf Analysis Multivariate Program

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Journal Article
Journal: Paleobiology
Published: 01 July 1997
Paleobiology (1997) 23 (3): 373–390.
... of species in a flora with untoothed leaf margins. The second approach, known as the Climate-Leaf Analysis Multivariate Program, is based on a modern data set that is multivariate. I argue here that the simpler, univariate approach will give paleotemperature estimates at least as precise as the multivariate...
Journal Article
Journal: Paleobiology
Published: 01 January 2000
Paleobiology (2000) 26 (4): 668–688.
... from different regions. Models based on data sets from North America and Japan, namely the Climate-Leaf Analysis Multivariate Program (CLAMP) data set of J. A. Wolfe, and from east Asia produce reasonably accurate estimates of temperature and precipitation, suggesting that the climateleaf morphology...
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Journal Article
Journal: PALAIOS
Published: 01 March 2007
PALAIOS (2007) 22 (2): 212–219.
... at the lamina-petiole junction. All 7 of these characters and only 1 of the 13 asymmetry characters had an association with climate. These characters corresponded to five of the seven broad categories of Wolfe's Climate-Leaf Analysis Multivariate Program shape descriptors, excluding only tooth shape and lobing...
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Journal Article
Journal: Paleobiology
Published: 01 September 2015
Paleobiology (2015) 41 (4): 528–553.
.... Several procedures have been developed that quantify covariation between the relative abundance of plant character states and the states of climate variables as a means of estimating paleoclimate parameters. One of the most widely used of these is the Climate Leaf Analysis Multivariate Program (CLAMP...
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Journal Article
Journal: PALAIOS
Published: 01 March 2014
PALAIOS (2014) 29 (3): 121–128.
... are scarce. Using Climate Leaf Analysis Multivariate Program (CLAMP) and Bioclimatic Analysis (BA) on plant fossils from the mid- to Upper Cretaceous Winton Formation, central-western Queensland, and working within the context of global paleoclimatic reconstructions and the vertebrate fauna from this unit...
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Series: GSA Special Papers
Published: 01 January 2014
DOI: 10.1130/2014.2503(06)
... temperature (MAT) estimates of ~7–11 °C (5–14 °C including overlapping estimation errors). The Climate Leaf Analysis Multivariate Program (CLAMP) produced a MAT value of 11–12 °C ± 2 °C. Leaf area analysis produced mean annual precipitation (MAP) estimates of 197 cm (+152/−86 cm) and 191 cm (+161/−87 cm...
Journal Article
Published: 02 February 2016
Canadian Journal of Earth Sciences (2016) 53 (6): 574–590.
... temperature (CMMT) 3.5–7.9 °C; mean annual precipitation (MAP) 103–157 cm/year. Leaf size analysis estimates MAP at 121 ± 39 cm/year. Estimates from the climate leaf analysis multivariate program corroborate these results, although with a slightly cooler MAT (13.3 ± 2.1 °C). Plants that support...
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Journal Article
Published: 19 November 2009
Canadian Journal of Earth Sciences (2009) 46 (11): 811–822.
... precipitation estimates by Greenwood et al. (2005) for Okanagan Highlands floras used bioclimatic analysis (a floristic as opposed to physiognomic approach) and other workers have relied on the climate leaf analysis multivariate program, or CLAMP (e.g., Wolfe and Wehr 1991 ; Mustoe and Gannaway 1997...
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Journal Article
Journal: PALAIOS
Published: 01 October 2005
PALAIOS (2005) 20 (5): 429–438.
...ROBERT A. SPICER; ALEXEI B. HERMAN; ELIZABETH M. KENNEDY Abstract CLAMP (Climate Leaf Analysis Multivariate Program) is a powerful paleoclimate proxy with the ability to yield quantitative data on past temperatures, precipitation, growing season length, and humidity, as well as enthalpy (a property...
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Journal Article
Journal: PALAIOS
Published: 01 June 2003
PALAIOS (2003) 18 (3): 266–274.
... size and shape (physiognomic) variables, also scored on a percentage basis as part of a collection and analysis procedure known as CLAMP (climate-leaf-analysis multivariate program; Wolfe, 1993 ; Wolfe, 1995 ). For variables other than mean annual temperature, the accuracy of CLAMP analyses...
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Journal Article
Journal: PALAIOS
Published: 01 April 2004
PALAIOS (2004) 19 (2): 129–142.
... ( Wilf, 1997 ). Margin type is not the only leaf character that is climatically informative, so Wolfe (1993) developed a multivariate database and analytical procedure known as CLAMP (climate leaf analysis multivariate program). This technique incorporated a broader geographical coverage than...
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Journal Article
Journal: PALAIOS
Published: 01 July 2013
PALAIOS (2013) 28 (7): 418–432.
... for a PFT refer to the total sum of PFT entries for a sample. To interpret the PFT spectra of the fossil sites in terms of vegetation units, cluster analysis was performed using a data matrix with 19 common PFTs (PAST program package; single linkage between groups; distance measure: squared...
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Journal Article
Journal: PALAIOS
Published: 01 January 2010
PALAIOS (2010) 25 (4): 234–238.
... of CLAMP ( Spicer, 2009 ), in order to evaluate relationships between each leaf character and MAT, and to compare the estimated value from CLAMP with the actual MAT for every sample. In addition to these mainly regional studies, the widely used method, CLAMP (Climate Leaf Analysis Multivariate Program...
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Journal Article
Journal: Paleobiology
Published: 01 January 2002
Paleobiology (2002) 28 (3): 399–421.
... climate estimates for unknowns (fossil sites). This method has been given the acronym CLAMP, Climate-Leaf Analysis Multivariate Program ( Wolfe 1993 , 1995 ; Kovach and Spicer 1996 ). Stranks and England (1997) used a resemblance function, which selects a subset of samples from the CLAMP database...
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Journal Article
Journal: Geology
Published: 01 August 2015
Geology (2015) 43 (8): 683–686.
... temperatures were based on multiple calibrations and methods, including leaf margin analysis, Climate Leaf Analysis Multivariate Program (CLAMP), digital leaf physiognomy, and our own recalibration of leaf margin temperatures in Wolfe and Upchurch (1987) . Sea-surface temperatures (SSTs) were estimated using...
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Journal Article
Journal: PALAIOS
Published: 01 June 2011
PALAIOS (2011) 26 (6): 335–345.
... entire margins. Wolfe (1994) performed a leaf physiognomic climate estimate analysis on this collection (Climate Leaf Multivariate Program; CLAMP) and obtained results that indicate wet and warm temperate conditions, corroborating earlier paleoclimatic interpretations. The composite collection...
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Journal Article
Journal: Paleobiology
Published: 01 January 2005
Paleobiology (2005) 31 (1): 117–140.
... the principal coordinates analysis of this data set: (1) the loss of morphological diversity associated with marginal leaf growth among seed plants after sharing the complete Paleozoic range of such morphologies with ferns and (2) the repeated evolution of more complex, angiosperm-like leaf traits among both...
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Journal Article
Published: 14 April 2016
Canadian Journal of Earth Sciences (2016) 53 (6): 591–604.
... population, ( ii ) assess whether a combined collection yields more precise climate estimates, and ( iii ) reconstruct paleoclimate to assess the character of regional Early Eocene precipitation seasonality. Combined, the two samples yielded 43 dicot leaf morphotypes. Analysis of leaf size distribution using...
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Journal Article
Published: 14 March 2005
Canadian Journal of Earth Sciences (2005) 42 (2): 167–185.
... that the Okanagan Highlands in the late Early Eocene to early Middle Eocene experienced a microthermal to lower mesothermal mesic climate (Tables  1 , 3 ). The results from leaf margin analysis (eqs. [ 1 ] and [ 2 ]) for all sites, except Quilchena, provided an estimated MAT in the range 3.5–10.4 °C (Table  1...
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Table  1. Data sets and statistical methods used to estimate <b>climate</b> from l...
Published: 01 January 2000
Table 1. Data sets and statistical methods used to estimate climate from leaf morphology in this study. CLAMP refers to the Climate-Leaf Analysis Multivariate Program data set of Wolfe (1993, 1995). CLAMP 3A refers to the most recent version of the data set, which has percent occurrence data