This datafile contains estimates of water budget terms for the Amazon basin upstream of Óbidos.  Storage data is derived from the GRACE satellite, the time derivative is estimated using two methods, precipitation is estimated from 4 sources, Q (runoff) is measured from the gauging station at Óbidos, and evapotranspiration (ET) is estimated as ET=Q-P-dS/dt. All fluxes are reported in units of mm/s of water flux, and storage is reported in units of mm of water. For further description of the methods and data sources please see the accompanying manuscript:

A Direct Estimate of the Seasonal Cycle of Evapotranspiration over the Amazon Basin. 
Swann, A.L.S., Koven, C.D.
published in Journal of Hydrometeorology (2017).

Contact: Abigail Swann, aswann@uw.edu

missing data are reported as NaN

The data columns are as follows:
month: months starting in January, 2002
Storage: (mm), calculated from GRACE
dSdt_center: (mm/s) change in storage per change in time calculated using a centered difference
dSdt_interpolated: (mm/s) change in storage per change in time calculated using interpolated storage and a backwards difference
Q: (mm/s) Runoff measured at the gauging station in Óbidos
Precip_gpcp: (mm/s) precipitation estimated from GPCP
Precip_trmm: (mm/s) precipitation estimated from TRMM
Precip_gpcc: (mm/s) precipitation estimated from GPCC
Precip_cru: (mm/s) precipitation estimated from CRU
ET_center_gpcp: (mm/s) ET estimated using dSdt_center and Precip_gpcp
ET_center_trmm: (mm/s) ET estimated using dSdt_center and Precip_trmm
ET_center_gpcc: (mm/s) ET estimated using dSdt_center and Precip_gpcc
ET_center_cru: (mm/s) ET estimated using dSdt_center and Precip_cru
ET_interpolated_gpcp: (mm/s) ET estimated using dSdt_interpolated and Precip_gpcp
ET_interpolated_trmm: (mm/s) ET estimated using dSdt_interpolated and Precip_trmm
ET_interpolated_gpcc: (mm/s) ET estimated using dSdt_interpolated and Precip_gpcc
ET_interpolated_cru: (mm/s) ET estimated using dSdt_interpolated and Precip_cru