spphpr {spphpr} | R Documentation |
Spring Phenological Prediction
Description
Predicts the occurrence times (in day-of-year) of spring phenological events. Three methods, including the accumulated degree days (ADD) method, the accumulated days transferred to a standardized temperature (ADTS) method, and the accumulated developmental progress (ADP) method, were used. See Shi et al. (2017a, 2017b) for details.
Details
The DESCRIPTION file:
Package: | spphpr |
Type: | Package |
Title: | Spring Phenological Prediction |
Version: | 1.1.5 |
Date: | 2025-06-20 |
Authors@R: | c(person(given="Peijian", family="Shi", email="pjshi@njfu.edu.cn", role=c("aut", "cre")), person(given=c("Zhenghong"), family="Chen", email="chenzh64@126.com", role=c("aut")), person(given=c("Jing"), family="Tan", email="jmjwyb@163.com", role=c("aut")), person(given=c("Brady K."), family="Quinn", email="brady.quinn@dfo-mpo.gc.ca", role=c("aut"))) |
Author: | Peijian Shi [aut, cre], Zhenghong Chen [aut], Jing Tan [aut], Brady K. Quinn [aut] |
Maintainer: | Peijian Shi <pjshi@njfu.edu.cn> |
Description: | Predicts the occurrence times (in day-of-year) of spring phenological events. Three methods, including the accumulated degree days (ADD) method, the accumulated days transferred to a standardized temperature (ADTS) method, and the accumulated developmental progress (ADP) method, were used. See Shi et al. (2017a) <doi:10.1016/j.agrformet.2017.04.001> and Shi et al. (2017b) <doi:10.1093/aesa/sax063> for details. |
Depends: | R (>= 4.2.0) |
License: | GPL (>= 2) |
Index of help topics:
ADD Function for Implementing the Accumulated Degree Days Method Using Mean Daily Temperatures ADD2 Function for Implementing the Accumulated Degree Days Method Using Minimum and Maximum Daily Temperatures ADD3 Function for Implementing the Accumulated Degree Days Method Using Mean Daily Temperatures for the Combinations of the Starting Date and Base Temperature ADD4 Function for Implementing the Accumulated Degree Days Method Using Minimum and Maximum Daily Temperatures for the Combinations of the Starting Date and Base Temperature ADP Function for Implementing the Accumulated Developmental Progress Method Using Mean Daily Temperatures ADP2 Function for Implementing the Accumulated Developmental Progress Method Using Minimum and Maximum Daily Temperatures ADTS Function for Implementing the Accumulated Days Transferred to a Standardized Temperature Method Using Mean Daily Temperatures ADTS2 Function for Implementing the Accumulated Days Transferred to a Standardized Temperature Method Using Minimum and Maximum Daily Temperatures BJDAT Daily Air Temperature Data of Beijing from 1952 to 2012. apricotFFD First flowering date records of _Prunus armeniaca_ predADD Prediction Function of the Accumulated Degree Days Method Using Mean Daily Temperatures predADD2 Prediction Function of the Accumulated Degree Days Method Using Minimum and Maximum Daily Temperatures predADP Prediction Function of the Accumulated Developmental Progress Method Using Mean Daily Temperatures predADP2 Prediction Function of the Accumulated Developmental Progress Method Using Minimum and Maximum Daily Temperatures predADTS Prediction Function of the Accumulated Days Transferred to a Standardized Temperature Method Using Mean Daily Temperatures predADTS2 Prediction Function of the Accumulated Days Transferred to a Standardized Temperature Method Using Minimum and Maximum Daily Temperatures spphpr Spring Phenological Prediction toDOY Function for Transferring a Date to the Value of Day-of-Year
Note
We thank Benjamin Altmann, Lei Chen, Linli Deng, Feng Ge, Wen Gu, Liang Guo, Jianguo Huang, Cang Hui, Konstanze Lauseker, Gadi V.P. Reddy, Di Tang, Yunfeng Yang, Mei Xiao, Lin Wang, and Wangxiang Zhang for their valuable help during the development of this package.
Author(s)
Peijian Shi [aut, cre], Zhenghong Chen [aut], Jing Tan [aut], Brady K. Quinn [aut]
Maintainer: Peijian Shi <pjshi@njfu.edu.cn>
References
Shi, P., Chen, Z., Reddy, G.V.P., Hui, C., Huang, J., Xiao, M. (2017a) Timing of cherry tree blooming:
Contrasting effects of rising winter low temperatures and early spring temperatures.
Agricultural and Forest Meteorology 240-
241, 78-
89. doi:10.1016/j.agrformet.2017.04.001
Shi, P., Fan, M., Reddy, G.V.P. (2017b) Comparison of thermal performance equations in describing
temperature-dependent developmental rates of insects: (III) Phenological applications.
Annals of the Entomological Society of America 110, 558-
564. doi:10.1093/aesa/sax063