Community Earth System Model (CESM) simulations disentangling CO2 effects - PI (4 of 4)

It is widely recognized that water availability influences plant growth, but plants also exert a strong control on the water cycle. Plant transpiration constitutes about 60% of the total flux of water from the land to the atmosphere, and changes in vegetation coverage and ecosystem functioning can substantially alter land surface water and energy fluxes. A growing body of research has found that plant responses to increasing atmospheric CO2 can modify the water cycle. Rising CO2 concentrations at the land surface directly alter plant water use and land evapotranspiration, which previous studies have found can drive global-scale changes in precipitation, runoff, and streamflow. Concomitantly, the radiative effects of increasing CO2  modify atmospheric variables that affect plant functioning, such as temperature, vapor pressure deficit, and precipitation. Plant responses to these radiatively driven climate changes can further influence the hydrologic cycle. While multiple studies have fou..., We ran simulations in a partially coupled configuration of the Community Earth System Model version 2 (CESM2; git tag: cesm2_3_beta03) using an active atmosphere (CAM6; git tag cam6_3_017), an active land model (CLM5; git tag branch_tags/PPE.n08_ctsm5.1.dev030), and a slab ocean which is based on q-fluxes from preindustrial simulations of the full dynamic ocean model. The land was initialized with the spun-up land state from the default model parameterization which includes the carbon content of soil and vegetation pools. 
We ran a suite of model experiments to disentangle the physiological and radiative effects of CO2, and to identify how leaf area responses modulate those effects. The model output from this suite of simulations is divided among four repositories which isolate the physiological (PHYS), radiative (RAD), and full physiological+radiative (FULL) effects of CO2 compared to the preindustrial control (PI). All simulations branched from a preindustrial control simulation at ye..., , # CESM simulations disentangling CO2 effects - PI

[https://doi.org/10.5061/dryad.r4xgxd2nr](https://doi.org/10.5061/dryad.r4xgxd2nr)

## Related datasets

We ran a suite of model experiments to disentangle the physiological and radiative effects of CO2, and to identify how leaf area responses modulate those effects. The model output from this suite of simulations is divided among four repositories which isolate the physiological (PHYS), radiative (RAD), and full physiological+radiative (FULL) effects of CO2 compared to the preindustrial control (PI). This repository contains model output from the preindustrial control (PI) simulations.

## Description of the data and file structure

This dataset is organized into four zipped files, each of which contains model output from a different simulation: `coupled_DEFmedslope_1xCO2_02.tar.gz`  `coupled_DEFmedslope_1xCO2_03.tar.gz`, `coupled_DEFmedslope_1xCO2_05.tar.gz`, and `coupled_DEFmedslope_1xCO2_SP_02.tar.gz`. Each of these files contain mo...