These methods, instrumentation and/or protocols apply to all data in this dataset:Methods and protocols used in the collection of this data package |
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Description: | Data was downloaded from the 15 NPP study sites on the Jornada Experimental Range and the Chihuahuan Desert Rangeland Research Center and then combined into a larger dataset with precipitation, latitude, temperature, and relative humidity to derive SPEI and VPD.
The 15 NPP datasets were assembled using the R script available as an entity in this metadata. Packages get_data.R and spei.r are required to successfully run the script. The package get_data.R is available on the Jornada-IM GitHub repository under climate_metrics and spei.r is available on Greg E. Maurer's GitHub Repository. Links are listed below.
https://github.com/jornada-im/climate-metrics
https://github.com/gremau/rclimtools
==================== Data Sources =========================
Title: Jornada Basin LTER: Wireless meteorological station at NPP X-XXXX site: Daily summary data: 2013-ongoing
Local Identifiers:
C-CALI: knb-lter-jrn.210437046.32
C-GRAV: knb-lter-jrn.210437047.31
C-SAND: knb-lter-jrn.210437048.31
G-BASN: knb-lter-jrn.210437049.31
G-IBPE: knb-lter-jrn.210437050.29
G-SUMM: knb-lter-jrn.210437051.28
M-NORT: knb-lter-jrn.210437052.30
M-WELL: knb-lter-jrn.210437054.30
M-RABB: knb-lter-jrn.210437053.30
P-COLL: knb-lter-jrn.210437055.31
P-SMALL: knb-lter-jrn.210437056.30
P-TOBO: knb-lter-jrn.210437057.30
T-EAST: knb-lter-jrn.210437058.30
T-TAYL: knb-lter-jrn.210437059.30
T-WEST: knb-lter-jrn.210437060.30
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager(JRN-LTER Information Manager)
=========================================================== |
| Description: | A 12-month Standardized Precipitation Evapotranspiration Index (SPEI) was derived using precipitation depths and calculated potential evapotranspiration (PET) using the Thornthwaite method, which requires average temperature and latitude. The SPEI package in R was used for this derivation and was created by Santiago Begueria, Borja Latorre, Fergus Reig, and Sergio M. Vicente Serrano. Certain SPEI values for a few sites were interpolated for up to five months during some time series even though the temperature values were missing. We believe it is based on the 12-month SPEI time scale since it is longer than the missing data.
Missing data periods include the following sites and dates (YYYY-MM):
G-BASN: 2015-03, 2015-04, 2015-05, 2015-06, 2015-07
G-SUMM: 2015-04, 2015-05, 2015-06, 2015-07
M-NORT: 2014-06, 2014-07, 2014-8, 2014-09
M-WELL: 2014-07, 2014-08, 2014-09, 2015-03, 2015-04, 2015-05, 2015-06, 2015-07, 2015-08
P-COLL: 2014-06, 2014-07, 2014-08, 2014-09, 2015-03, 2015-04, 2015-05, 2015-06, 2015-07
P-TOBO: 2015-03, 2015-04, 2015-05, 2015-06, 2015-07, 2015-08, 2015-09
T-EAST: 2014-06, 2014-07, 2014-08, 2015-03, 2015-04, 2015-05, 2015-06, 2015-07
T-TAYL: 2014-07, 2014-08, 2015-03, 2015-04, 2015-05, 2015-06, 2015-07
T-WEST: 2015-03, 2015-04, 2015-05, 2015-06, 2015-07
S.M. Vicente-Serrano, S. Beguería, J.I. López-Moreno. 2010. A Multi-scalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index – SPEI. Journal of Climate 23: 1696, DOI: 10.1175/2009JCLI2909.1. http://sac.csic.es/spei/ |
| Description: | Vapor pressure deficit was calculated by taking the difference between the actual vapor pressure from the saturated vapor pressure for the average, minimum, and maximum relative humidity to their respective temperatures.
Vapor pressure deficit (vpd) = svp-avp
Saturated vapor pressure (svp) = 0.6108 * exp(17.27 * T / (T + 237.3))
Actual Vapor Pressure (avp) = rh/100*svp
where T is temperature and rh is relative humidity |
| Description: | NPP site: C-CALI (knb-lter-jrn.210437046.32)
==================== Data Sources =========================
C-CALI
Local ID: knb-lter-jrn.210437046.32
DOI: 10.6073/pasta/1a2b8dc5a3e5aa66122024be72ef54c7
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager(JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: C-GRAV (knb-lter-jrn.210437047.31)
==================== Data Sources =========================
C-GRAV
Local ID: knb-lter-jrn.210437047.31
DOI: 10.6073/pasta/d42932fdcc3a04588be138cadb2ad0f2
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: C-SAND (knb-lter-jrn.210437048.31)
==================== Data Sources =========================
C-SAND
Local ID: knb-lter-jrn.210437048.31
DOI: 10.6073/pasta/a21ab472a7255c49da1a731eb96680e3
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: G-BASN (knb-lter-jrn.210437049.31)
==================== Data Sources =========================
G-BASN
Local ID: knb-lter-jrn.210437049.31
DOI: 10.6073/pasta/e9946b189079c1dfa1b8cda5c66865ef
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: G-IBPE (knb-lter-jrn.210437050.29)
==================== Data Sources =========================
G-IBPE
Local ID: knb-lter-jrn.210437050.29
DOI: 10.6073/pasta/bb68f346d95715bc9d554baf77d1a84e
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: G-SUMM (knb-lter-jrn.210437051.28)
==================== Data Sources =========================
G-SUMM
Local ID: knb-lter-jrn.210437051.28
DOI:10.6073/pasta/fb2cb3621b95e821a6075e40572fa8ac
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: M-NORT (knb-lter-jrn.210437052.30)
==================== Data Sources =========================
M-NORT
Local ID: knb-lter-jrn.210437052.30
DOI: 10.6073/pasta/91c39fc4cccafaf37e3586b43a3e6a05
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: M-WELL (knb-lter-jrn.210437054.30)
==================== Data Sources =========================
M-WELL
Local ID: knb-lter-jrn.210437054.30
DOI: 10.6073/pasta/fb2d9175af79d5e97044aa9a1d95cf21
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: M-RABB (knb-lter-jrn.210437053.30)
==================== Data Sources =========================
M-RABB
Local ID: knb-lter-jrn.210437053.30
DOI: 10.6073/pasta/50fedba87283b8d2bad259737c77cb25
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: P-COLL (knb-lter-jrn.210437055.31)
==================== Data Sources =========================
P-COLL
Local ID: knb-lter-jrn.210437055.31
DOI: 10.6073/pasta/e818f503ed16c1a1b0eea7b1e23ab5a8
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: P-SMALL (knb-lter-jrn.210437056.30)
==================== Data Sources =========================
P-SMALL
Local ID: knb-lter-jrn.210437056.30
DOI: 10.6073/pasta/7b045b7468ce227854e3d3412977095f
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: P-TOBO (knb-lter-jrn.210437057.30)
==================== Data Sources =========================
P-TOBO
Local ID: knb-lter-jrn.210437057.30
DOI: 10.6073/pasta/f9458796a2c22521214edcb35ab126f2
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: T-EAST (knb-lter-jrn.210437058.30)
==================== Data Sources =========================
T-EAST
Local ID: knb-lter-jrn.210437058.30
DOI: 10.6073/pasta/751d6cf207f54380421f06f730166ef2
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager (JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP site: T-TAYL (knb-lter-jrn.210437059.30)
==================== Data Sources =========================
T-TAYL
Local ID: knb-lter-jrn.210437059.30
DOI: 10.6073/pasta/3f4241e981d10c65ea8fcec785157dd5
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager(JRN-LTER Information Manager)
=========================================================== |
| Description: | NPP sites: T-WEST (knb-lter-jrn.210437060.30)
==================== Data Sources =========================
T-WEST
Local ID: knb-lter-jrn.210437060.30
DOI: 10.6073/pasta/9fc9917663dfef2e8dc0900a7e67d86d
Creator: Anderson, John (JRN LTER, Research Site Manager)
Contact: Data Manager(JRN-LTER Information Manager)
=========================================================== |
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