c3_temperature_param_sharkey {PhotoGEA}R Documentation

C3 temperature response parameters from Sharkey et al.

Description

Parameters describing the temperature response of important C3 photosynthetic parameters, intended to be passed to the calculate_temperature_response function.

Usage

c3_temperature_param_sharkey

Format

List with 11 named elements that each represent a variable whose temperature-dependent value can be calculated using an Arrhenius equation or a polynomial equation:

In turn, each of these elements is a list with at least 2 named elements:

Source

Many of these parameters are normalized to their values at 25 degrees C. These variables include _norm in their names to indicate this.

Response parameters were obtained from Sharkey et al. (2007). In this publication, gas concentrations are expressed as partial pressures (in Pa or kPa) rather than mole fractions (micromol / mol or mmol / mol). However, for consistency with c3_temperature_param_bernacchi, here we prefer to use mole fractions.

To convert a concentration expressed as a partial pressure (P; in Pa) to a concentration expressed as a mole fraction (C; in micromol / mol), we need a value for atmospheric pressure; we will use the typical value of 101325 Pa. Then C = P / 101325 * 1e6 or C = P * cf, where cf = 1e6 / 101325 is a conversion factor. The same correction can be used to convert kPa to mmol / mol. The value of cf can be accessed using PhotoGEA:::c_pa_to_ppm.

References:


[Package PhotoGEA version 1.3.3 Index]