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Meteorolgical forcing

Author: S. Zaehle ([email protected])

04/06/2013 (revised 16/07/2013)

Overview

File naming convention: *.csv -> comma separated ascii files *_ALMA.nc -> ALMA convention like netcdf files *_CDF.nc -> CDF compliant netcdf file

The period 1992-2011 is the meteorological data for the spin-ip The period 2012-2023 is the meteorological data for the actual simulation

  • 4 version exist for the simulation period AMBAVG: annual CO2 increase as in the RCP3PD scenario meteorological data from 1998 (corrected for leap-years where necessary) AMBVAR: annual CO2 increase as in the RCP3PD scenario meteorological data from 1998-2010 ELEAVG: annual CO2 increase as in the RCP3PD scenario + 150ppm from Sept 2012 meteorological data from 1998 (corrected for leap-years where necessary) ELEVAR: annual CO2 increase as in the RCP3PD scenario + 150ppm from Sept 2012 meteorological data from 1998-2010

The files *CO2NDEP_1860-2023.dat contain annual/daily CO2 and N deposition values for spin-up and model simulation

The data were generate using

  • hourly data from Princton forcing data set, disaggregated in time using the weather generator of the CABLE model. Comparison of daily data with local site meteorology suggests an acceptable fit.
  • annual CO2 are rom the RCP historic period and future RCP3PD scenario (2005-2023)
  • eCO2 treatment follows the experimental protocol of the site (pers.comm.)
  • N dep follows the relative increase in atm. CO2 and reaches 3 kg N / ha / yr in the year 2000.

Modifications to original data:

  • Air pressure has been set to 1013 hPa
  • PAR has been generated from incident downward shortwave radiation, assuming a conversion factor of 2.3 umol/m^2/s per W/m^2
  • VPD and RH have been calculated from Qair using the approach of Montheith & Unsworth 2008
  • Wind data have been taken from Bernard Pak, derived with Cable from the Sheffield climate data 1992-2008. Values for 2009-2011 correspond to those of 1992-1994
  • solar noon was corrected to be at 12 hours!