Work From Home, It Helps

The world\u27s population was in lockdown due to COVID 19, accompanied by stringent social measures in 2020. Surprisingly, the outbreak\u27s positive impacts outweigh its adverse effects in terms of environmental well-being as there has been a significant decrease in greenhouse gas emissions at an average of 8% around the world. This study focuses on the relationship between greenhouse gas (GHG) emissions and the strictness level of lockdown measures across the 50 states of the United States of America for the years 2019 and 2020, as the data is retrieved from the U.S federal and Environmental Protection Agency (EPA) websites. We plan to conduct regression analysis to examine whether there is a significance in the relationship between the lockdown measures and the GHG emissions. However, our quantitative analysis may not show conclusive results as the data needed for this study has to be measured over a more extended period of time. This paper aims to provide the first step in analyzing the quantitative data to establish the impact of Covid-19 on climate change. Our findings may support an approach similar to the measures implemented during the outbreak and carry them forward in addition to current efforts to improve our global climate

Energy Balance Closure At Fluxnet Sites

A comprehensive evaluation of energy balance closure is performed across 22 sites and 50 site-years in FLUXNET, a network of eddy covariance sites measuring long-term carbon and energy fluxes in contrasting ecosystems and climates. Energy balance closure was evaluated by statistical regression of turbulent energy fluxes (sensible and latent heat (LE)) against available energy (net radiation, less the energy stored) and by solving for the energy balance ratio, the ratio of turbulent energy fluxes to available energy. These methods indicate a general lack of closure at most sites, with amean imbalance in the order of 20%. The imbalance was prevalent in all measured vegetation types and in climates ranging from Mediterranean to temperate and arctic. There were no clear differences between sites using open and closed path infrared gas analyzers. At a majority of sites closure improved with turbulent intensity (friction velocity), but lack of total closure was still prevalent under most conditions. The imbalance was greatest during nocturnal periods. The results suggest that estimates of the scalar turbulent fluxes of sensible and LE are underestimated and/or that available energy is overestimated. The implications on interpreting long-term CO2 fluxes at FLUXNET sites depends on whether the imbalance results primarily from general errors associated with the eddy covariance technique or from errors in calculating the available energy terms. Although it was not entirely possible to critically evaluate all the possible sources of the imbalance, circumstantial evidence suggested a link between the imbalance and CO2 fluxes. For a given value of photosynthetically active radiation, the magnitude of CO2 uptake was less when the energy imbalance was greater. Similarly, respiration (estimated by nocturnal CO2 release to the atmosphere) was significantly less when the energy imbalance was greater