The key to understanding the dynamics of the Antarctic ice sheet involves more accurately determining its mass budget using extended observations to provide a longer and higher-resolution observational record and improve the understanding of ice sheet evolution, which is crucial for accurate future projections of global sea level4,6.
We show that changes of CH4 loss rate due to increased tropospheric air temperature and CH4 loss due to Cl in the stratosphere are important sources of uncertainty to more accurately estimate the global CH4 budget from δ13C observations.
Yver, C., I. Pison, Audrey Fortems-Cheiney, M. Schmidt, F. Chevallier, M. Ramonet, A. Jordan, O. A. Søvde, A. Engel, R. E. Fisher et al. "A new estimation of the recent tropospheric molecular hydrogen budget using atmospheric observations and variational inversion". Atmos.
Britain finds itself in a position where it is the largest contributor to Esa's Earth observation budget but also about to leave the EU.
However, even though guideline compliance was systematically lower among private facilities, compliance in both the public and the private sector increased progressively from the implementation of the decentralized budget through the observation period.
It means - at the moment - that Sentinel-1 would get into space with only a few months of guaranteed budget to sustain its observations of the planet.
Phenology is also a first-order control on terrestrial carbon and energy budgets, and remotely sensed observations of phenology are often used to parameterize seasonal vegetation dynamics in ecosystem models.
Although a global optimization problem could be written to optimize the choice of the k-th experiment based on possible future observations and total budget constraint, we propose a simple, greedy formulation where at each step we choose the experiment that most decreases the estimation risk per cost unit.
According to the observation, the water budget on the basin is significantly unbalanced; it is attributed to a large underestimation of precipitation, typical of high mountain areas.
These may include typically multi-year field observations, farm gate budgets, watershed studies, life cycle assessments, enterprise and economic analyses, or regional and global modeling.
