This LIM-CORR-README.docx file was generated on 2021-08-17 by Colin P. Evans

GENERAL INFORMATION

1. Title of Dataset: Dataset for Intrinsic Century Scale Variability in Tropical Pacific Sea Surface Temperatures and their Influence on Southwestern US Hydroclimate

2. Author Information
	A. Principal Investigator Contact Information
		Name: Colin P. Evans
		Institution: Cornell University
		Address: Snee Hall, Cornell University, Ithaca, NY
		Email: cpe28@cornell.edu

	B. Associate or Co-investigator Contact Information
		Name: Toby R. Ault
		Institution: Cornell University
		Email: toby.ault@cornell.edu

3. Date of data collection (single date, range, approximate date):
	LME PDSI data: Monthly from 01850 to 012006
	CMIP5 data: historical – 011850 to 012006
	CMIP6 data: historical – 011850 to 012015, SSP5-8.5 – 012015 to 012100
	LIM - NaN

4. Geographic location of data collection:
	PDSI data: SWUS (105°-120°W, 32°-40°N)

5. Information about funding sources that supported the collection of the data: 
	This work was made possible through funding from the National Science Foundation awards AGS1751535 and AGS1602564.

SHARING/ACCESS INFORMATION

1. Licenses/restrictions placed on the data: This dataset is shared under a Creative Commons 1.0 Universal Public Domain Dedication (https://creativecommons.org/publicdomain/zero/1.0/). The material can be copied, modified and used without permission, but attribution to the original authors is always appreciated. 

2. Links to publications that cite or use the data: Submitted to Geophysical Research Letters (8/17/2021)

DATA & FILE OVERVIEW

1. File List: 
CMIP5-PDSI_Amon_ACCESS1-0historical.nc
CMIP5-PDSI_Amon_ACCESS1-3historical.nc
CMIP5-PDSI_Amon_CNRM-CM5historical.nc
CMIP5-PDSI_Amon_CanESM2historical.nc
CMIP5-PDSI_Amon_GISS-E2-Rhistorical.nc
CMIP5-PDSI_Amon_MIROC-ESMhistorical.nc
CMIP5-PDSI_Amon_MPI-ESM-LRhistorical.nc
CMIP5-PDSI_Amon_MPI-ESM-MRhistorical.nc
CMIP5-PDSI_Amon_MRI-CGCM3historical.nc
CMIP5-PDSI_Amon_NorESM1-Mhistorical.nc
CMIP5-PDSI_Amon_bcc-csm1-1-mhistorical.nc
CMIP6-pdsi_Amon_ACCESS-CM2_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_ACCESS-ESM1-5_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_BCC-CSM2-MR_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_CESM2_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_CanESM5_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_GFDL-ESM4_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_IPSL-CM6A-LR_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_MIROC6_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_MPI-ESM1-2-HR_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_MPI-ESM1-2-LR_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
CMIP6-pdsi_Amon_MRI-ESM2-0_hist-ssp585_r1i1p1f1_185001-210012.WUS.nc
LIM-scpdsipm_Amon_Sheffield_limCntrl201812121543_vCRU3p10_000101-010012.WUS.Rn_0001-1000.pcs.nc
LIM-sst_Omon_ERSST_LIMOut_v3b_000101-010012.tropical.Rn_0001-1000.pcs.nc
LME-pdsipm_Amon_CESM_past1000_run002-013_085101-200512.WUS.nc

All the files, except for the ones that start with “LIM” are created PDSI products from the specified source and/or modeling center. With these files, you should be able to pull the PDSI variable from the NC file for analysis. The LIM output comes in the form of principal components. To accurately analyze the relationship between Niño3.4 and SWUS PDSI, you need to correlate the first PC of the PDSI data and the second PC of the SST data.

METHODOLOGICAL INFORMATION

The PDSI created from CMIP5, CMIP6, and LENS was generated using python and built-in packages. Each model PDSI is in the model's native grid. PDSI is unitless, as are the principal components from the LIM. The LIM was run on a local cluster at Cornell University utilizing MATLAB. For further questions see the published article, and supplemental material or email the corresponding author.