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Description:

prysmapi 0.5.1

prysm-api
The API for PRoxY System Modeling (PRYSM).
Currently, it supports PSMs listed below:

Ice-core d18O
Tree-ring width with VSLite
Tree-ring cellulose
Tree MXD
Coral d18O and Sr/Ca
Speleothem d18O
Varve thickness

How to install
Simply
pip install prysm-api LMRt # LMRt provides many useful functions necessary for prysm-api

To use VS-Lite, in R
install.packages("devtools")
devtools::install_github("fzhu2e/VSLiteR")

Usage examples

Calling VS-Lite

import prysm

res = prysm.forward(
'prysm.vslite', # psm name
lat_obs, lon_obs, # lat/lon of the target location
lat, lon, time, # dimension variables of the environmentals
{ # environmental variables:
'tas': tas, # surface air temperature in (time, lat, lon) [K]
'pr': pr, # precipitation rate in (time, lat, lon) [kg/m2/s]
},
T1=8, T2=23, M1=0.01, M2=0.05, # PSM specific parameters
)

Here res is a dictionary that includes the pseudoproxy values and the
corresponding timepoints, plus other output for diagnostics.

Calling the PSM for ice core d18O

import prysm

res = prysm.forward(
'prysm.ice.d18O', # psm name
lat_obs, lon_obs, # lat/lon of the target location
lat, lon, time, # dimension variables of the environmentals
{ # environmental variables:
'tas': tas, # surface air temperature in (time, lat, lon) [K]
'pr': pr, # precipitation rate in (time, lat, lon) [kg/m2/s]
'psl': psl, # sea-level pressure in (time, lat, lon) [Pa]
'd18Opr': d18Opr, # precipitation d18O in (time, lat, lon) [permil]
},
)

References

Dee, S., J. Emile-Geay, M. N. Evans, A. Allam, E. J. Steig, and D. m. Thompson, 2015: PRYSM: An open-source framework for PRoxY System Modeling, with applications to oxygen-isotope systems. J. Adv. Model. Earth Syst., 7, 1220–1247, doi:10.1002/2015MS000447.
Dee, S. G., N. J. Steiger, J. Emile-Geay, and G. J. Hakim, 2016: On the utility of proxy system models for estimating climate states over the common era. J. Adv. Model. Earth Syst., 8, 1164–1179, doi:10.1002/2016MS000677.
Dee, S. G., L. A. Parsons, G. R. Loope, J. T. Overpeck, T. R. Ault, and J. Emile-Geay, 2017: Improved spectral comparisons of paleoclimate models and observations via proxy system modeling: Implications for multi-decadal variability. Earth and Planetary Science Letters, 476, 34–46, doi:10.1016/j.epsl.2017.07.036.
Dee, S. G., J. M. Russell, C. Morrill, Z. Chen, and A. Neary, 2018: PRYSM v2.0: A Proxy System Model for Lacustrine Archives. Paleoceanography and Paleoclimatology, 33, 1250–1269, doi:10.1029/2018PA003413.

License
MIT License (see the details here)
How to cite
If you find this package useful and use it in your research, please cite it with DOI:

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