Open Accesstreeclim: an R package for the numerical calibration of proxy‐climate relationships
Author(s) -
Zang Christian,
Biondi Franco
Publication year - 2015
Publication title -
ecography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.973
H-Index - 128
eISSN - 1600-0587
pISSN - 0906-7590
DOI - 10.1111/ecog.01335
Subject(s) - proxy (statistics) , spurious relationship , resampling , r package , computer science , calibration , climate change , ecology , climatology , data mining , environmental science , statistics , algorithm , mathematics , geology , machine learning , computational science , biology
The R package treeclim helps perform numerical calibration of proxy‐climate relationships, with an emphasis on tree‐ring chronologies. The package provides a unified, fast, and public‐domain compilation of established methods while adding novel functionality not implemented in other software. treeclim includes static and moving bootstrapped response and correlation functions, seasonal correlation analysis, a test for spurious temporal changes in proxy‐climate relations, and the evaluation of reconstruction skills. The stationary bootstrap method has been incorporated into the program as a ‘blocks of blocks’ resampling scheme. Applications of treeclim include the calibration of proxy timeseries used in paleoclimatology, forest ecology, and environmental monitoring.