  Direct atmospheric retrievals of exoplanets at high-resolution have recently
allowed for a more detailed characterisation of their chemistry and dynamics
from the ground. By monitoring the longitudinal distribution of species, as
well as the varying vertical temperature structure and dynamics between the
limbs of WASP-76b, across multiple transits, we aim to enhance our
understanding of the 3D nature and chemical/dynamical evolution of such objects
over the timescales of months/years. We present retrievals of three
VLT/ESPRESSO observations of the ultra-hot Jupiter WASP-76b, including one not
yet reported in the literature, from which we constrain the atmospheric
abundances, vertical temperature structure, and atmospheric dynamics for both
the leading and trailing limbs of the atmosphere separately, via novel
rotational broadening kernels. We confirm the presence of VO recently reported
in the atmosphere of WASP-76b. We find a uniform longitudinal distribution of
Fe and Mg across the limbs of the atmosphere, for each of our transits,
consistent with previous works as well as with stellar values. We constrain
substellar Na/Fe and Cr/Fe ratios across each of our transits, consistent with
previous studies of WASP-76b. Where constrained, V/Fe and VO/Fe ratios were
also found to be broadly consistent between the limbs of the atmosphere for
each of the transits, as well as with previous studies. However, for two of the
transits, both V and VO were unconstrained in the leading limb, suggesting
possible depletion due to recombination and condensation. The consistency of
our constraints across multiple high-resolution observations, as well as with
previous studies using varying modelling/retrieval frameworks and/or
instruments, affirms the efficacy of high-resolution ground-based retrievals of
exoplanetary atmospheres.
