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


[Package spphpr version 1.1.5 Index]