dfxco2: Detrended XCO2 seasonal cycles for GOSAT-ACOSv3.5 and DGVM...

In lcalle/segmentTS: Segmentation analysis for cyclic time series data

Description

The detrended XCO2 seasonal cycle data presented herein, are the result of signal decomposition of XCO2 daily means by TransCom Region for 2009-2012. Land fluxes (NBP) underwent simulated atmospheric transport, using JAMSTEC's ACTM. XCO2 was then sampled via co-location to GOSAT observations. Both GOSAT and simulated XCO2 underwent signal decomposition, using the ccgcrv algoritm <https://www.esrl.noaa.gov/gmd/ccgg/mbl/crvfit/crvfit.html>. All data (values) are in units of ppm, unless specified otherwise.

Usage

data(dfxco2)

Format

A data.frame with 100136 rows and 16 variables:

• year: year (integer)

• month: month (integer)

• day: day (integer)

• func: values of the full function (harmonic+trend+short-term & long-term digital filter) (float)

• poly: values of the polynomial part of the function (float)

• smooth: values of the short-term smoothed curve; function + short-term filter of residualas (float)

• trend: values of the trend curve; polynomial plus long-term filter of residuals (float)

• detrend: values of the original data points minus the trend curve (float)

• smcycle: values of the smoothed, detrended annual cycle; smooth - trend (float)

• harm: values of the harmonic part of the function (float)

• smres: values of the short-term smoothed residuals from the function (float)

• trres: values of the long-term smoothed residual from the function (float)

• gr: values of the growth rate; the first derivative of the trend curve (float)

• date_obj: date (YYYY-MM-DD)

• model: origin of data. Satellite-derived XCO2 observations (gosat) or Simulated XCO2 based on Dynamic Global Vegetation Models

• region_code: (integer) numeric code for different bio-regions

• region_name: (character) name of bio-region

References

Calle, L., B. Poulter, & P.K. Patra (2018)

Examples

data(dfxco2)

lcalle/segmentTS documentation built on May 7, 2019, 10:52 p.m.