Impacts of Land Use Change and atmospheric CO2 on Gross Primary Productivity (GPP), evaporation and climate in Southern Amazon (Open)

This work was carried out in the scope and with the support of the project: Climate Services Through Knowledge Co-Production: A Euro-South American Initiative for Strengthening Societal Adaptation Response to Extreme Events (CLIMAX).

The project consortium includes the following institutions: Centre National de la Recherche Scientifique CNRS/Instituto Franco-Argentino sobre Estudios de Clima y sus Impactos (UMI-IFAECI) (Argentina-France); General Coordination of Earth Sciences /National Institute  for Space Research (INPE) (Brazil); Institut de Recherche pour le Développement (IRD)/ Unité Mixte de Recherche (UMR 245) (France);  Le Laboratoire des Sciences du Climat et de l'Environnement (LSCE) (France); Potsdam Institute for Climate Impact Research (PIK) (Germany); Technical University of Munich (TUM) (Germany) and Wageningen University and Research (WUR) Netherlands). The project is sponsored by the Collaborative Research Action (CRA) on “Climate Predictability and Inter-Regional Linkages” of the Belmont Forum, launched in 2015.

Climate variability patterns linking the South American Monsoon region, including Amazonia, with southeastern South America influence climate extremes and impact several societal sectors. More than 200 million people live in the study region, which is also one of the largest agricultural production regions of the world and home to the world’s second largest hydroelectric power plant.

The objectives of CLIMAX  include  better understanding the combined role of remote and local drivers on South American climate variability from sub-seasonal to decadal timescales, and its impact on the occurrence and intensity of extreme events. Special focus is given to an improved understanding of the effects of land use changes from the Amazon to the subtropics and their impact on climate.

1. EXPERIMENT DESIGN

We used four models that are classified as Dynamic Global Vegetation Models (DGVMs) (Prentice et al., 2007; Rezende et al., 2015): Integrated Model of Land Surface Processes (INLAND) (Tourigny, 2014); Lund-Potsdam-Jena managed Land model version 4 (LPJmL4) (Schaphoff et al., 2018), Lund-Potsdam-Jena General Ecosystem Simulator (LPJ-GUESS) (Smith et al. 2001, Hickler et al., 2012), and Organising Carbon and Hydrology In Dynamic Ecosystems model (ORCHIDEE) (Krinner et al., 2005).

We used three forcings with climate data (GLDAS, GSWP3, and WATCH+WFDEI), Land Use Change (LUC) data and validation data (FLUXCOM (Remote sensor+meteorological data+artificial neural network approach), FLUXCOM (eddy covariance), MODIS (Light Use Efficiency), GLEAM, and TerraClimate (Rezende et al., 2022).

We conducted two sets of simulation experiments with different values of CO2: 1) increasing CO2 from the pre-industrial period to 2010 named historical CO2 (hist CO2); 2) constant concentration of 278 ppm of (pre-industrial) atmospheric CO2 named constant CO2 (const CO2). We ran both CO2 experiments under Land Use Change (LUC) and Potential Natural Vegetation (PNV) conditions. All combinations of CO2 and land use change resulted in four sets of simulation experiments per climate input: 1. LUC historical CO2; 2. LUC constant CO2; 3. PNV historical CO2; 4. PNV constant CO2  (Rezende et al., 2022).

2. DATA DESCRIPTION

The complete description of the data, including the climate forcing, LUC, the validation datasets, methodology, simulations, discussion and conclusion is in Rezende et al. (2022). This archive contains only the data description from the simulations (outputs) by the DGVMs.

2.1 SOFTWARE

The data were manipulated, worked, standardized, converted using the software: Climate Data Operators (cdo) version 1.7.0, Grid Analysis and Display System (Grads) (Documentation of GrADS) version 2.0.2, and RStudio Desktop version 1.3.1093 (R Core Team, 2020), through command lines and several scripts developed for this purpose. The figures were generated  with Grads, and RStudio, and some images were enhanced  with Gimp version 2.8.22. All the software used is freeware.

   2.2 PRIMARY DATA FROM SIMULATIONS

Data originating from the simulations are in monthly resolution, covering South America, with all the forcings. Despite data spanning  over 1948-2010 or 1950-2010 our study focuses on the period 1981-2010.

Variables: Gross Primary Productivity (GPP) (kg m-2 month-1), evaporation  (mm month-1) and transpiration (mm month-1), and Net Primary Productivity (NPP) (kg m-2 month-1) (not used in our experiment).

The naming of the files is according to the following rules:

DGVM_forcing_vegetation cover_CO2 concentration_attribute

DGVMs;

    InLand (INLAND)

    LPJ-G (LPJ-GUESS)

    LPJmL (LPJmL4)

    ORCHI (ORCHIDEE)

forcings: 

    gld - GLDAS

    gsw – GSWP3

    wat – WATCH+WFDEI

 

vegetation cover:

    LU – Land Use Change

    PNV – Potential Natural Vegetation

 

CO2 concentration:

    CO2 – historical CO2

    noCO2 – constant CO2 = 278 ppm

 

variables:

    E – evaporation

    Et – transpiration

    gpp – Gross Primary Productivity

    npp - Net Primary Productivity (not used in the experiment)

 

Example:

    inLand_gld_LU_noCO2_E.nc

 

 2.3 SUPPLEMENTARY DATA

These interception loss data (mm month-1) were requested by a reviewer to complement the analysis and are available only for the LUC CO2 scenario and for the study region: southern Amazon (70S and 140S of latitude and 660W and 510W of longitude).

Files are named  according to the following rules:

variable_season_forcing_DGVM_vegetation cover CO2 concentration_region

variable:

    inter – loss by interception

 

season:

    D – dry season

    R – rainy season

 

forcings: 

               gl - GLDAS

               gs – GSWP3

               wa – WATCH+WFDEI

 

DGVMs:

    in - INLAND 

    lg - LPJ-GUESS

            lm - LPJmL4

            or – ORCHIDEE

 

vegetation cover 

    L – Land Use Change

    P – Potential Natural Vegetation

 

CO2 concentration

    C – historical CO2

    N – constant CO2 = 278 ppm

 

region

    SA – southern Amazon

 

Example:

    inter_D_gl_in_LC_SA.nc

2.4 PROCESSED DATA

Processed data cover all scenarios and input data sets and are restricted to the study area: southern Amazon (70S and 140S of latitude and 660W and 510W of longitude).They are in seasonal resolution with averages for January-February-March-April (JFMA) (rainy season) and averages for June-July-August-September (JJAS). Each of the files contains the Gross Primary Productivity variables (GPP) (kg m-2 month-1), evaporation  (mm month-1) and transpiration (mm month-1), and Net Primary Productivity (NPP) (kg m-2 month-1) (not used in our experiment).

 

Files are named according to the following rules:

 

season_DGVM_forcing_vegetation cover CO2 concentration_region

season

    D – dry season

    R – rainy season

 

DGVMs:

    in - INLAND 

    lg - LPJ-GUESS

           lm - LPJmL4

           or - ORCHIDEE

 

forcings: 

           Gl - GLDAS

           Gs – GSWP3

           Wa – WATCH+WFDEI   

 

vegetation cover 

    L – Land Use Change

    P – Potential Natural Vegetation

 

CO2 concentration

    C – historical CO2

    N – constant CO2 = 278 ppm

 

Example:

D_in_Gs_LN.nc

2.5 DERIVED DATA

 

The variable Water Use Efficiency (WUE) (kg m-2 mm-1 month-1) results from rate: GPP / Tr (transpiration) (Eq. 1). 

 

WUE = GPP / Tr

(Eq. 1)

 

These data refer to the study region: southern Amazon and apply to only one scenario:  Land Use Change and historic CO2. Files are named  naming of according to the following rules:

 

Variable:

    WUE – Water Use Efficiency

 

season

    D – dry season

    R – rainy season

 

DGVMs:

    in - INLAND 

    lg - LPJ-GUESS

           lm - LPJmL4

           or - ORCHIDEE

 

forcings: 

               Gl - GLDAS

               Gs – GSWP3

               Wa – WATCH+WFDEI   

 

vegetation cover 

    L – Land Use Change

    P – Potential Natural Vegetation

 

CO2 concentration

    C – historical CO2

    N – constant CO2 = 278 ppm

 

region

    SA – southern Amazon

 

Example:

wue_D_lm_Gl_LC_SA.nc

 

How to cite this work:

Rezende, Luiz F. C., Aline Castro, Celso Von Randow, Romina Ruscica, Boris Sakschewski, Phillip Papastefanou, Nicolas Viovy, Kirsten Thonicke, Anna Sörensson, Anja Rammig, Iracema F. A. Cavalcanti. Impacts of Land Use Change and atmospheric CO2 on  Gross Primary Productivity (GPP), evaporation and climate in Southern Amazon. Journal of Geophysical Research Atmospheres (JGRA) - doi: 10.1029/2021JD034608. 2022.

References

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Rezende, Luiz F. C. et al., 2022. Impacts of Land Use Change and atmospheric CO2 on  Gross Primary Productivity (GPP), evaporation and climate in Southern Amazon. Journal of Geophysical Research - Atmospheres (JGRA) - doi: 10.1029/2021JD034608. 2022.

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