@Article{MakarievaGoNeShNoShLi:2017:ReSuPr,
author = "Makarieva, A. M. and Gorshkov, V. G. and Nefiodov, A. V. and
Sheil, D. and Nobre, Antonio Donato and Shearman, P. L. and Li, B.
L.",
affiliation = "{Petersburg Nuclear Physics Institute} and {Petersburg Nuclear
Physics Institute} and {Petersburg Nuclear Physics Institute} and
{Norwegian University of Life Sciences} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {The Australian National
University} and {University of California}",
title = "Kinetic energy generation in heat engines and heat pumps: the
relationship between surface pressure, temperature and circulation
cell size",
journal = "Tellus Series A: Dynamic Meteorology and Oceanography",
year = "2017",
volume = "69",
pages = "1272752",
keywords = "meridional circulation cells, kinetic energy generation, surface
temperature, surface pressure gradient, Carnot cycle, heat engine,
heat pump, condensation.",
abstract = "The pattern and size of the Earths atmospheric circulation cells
determine regional climates and challenge theorists. Here the
authors present a theoretical framework that relates the size of
meridional cells to the kinetic energy generation within them.
Circulation cells are considered as heat engines (or heat pumps)
driven by surface gradients of pressure and temperature. This
approach allows an analytical assessment of kinetic energy
generation in the meridional cells from the known values of
surface pressure and temperature differences across the cell, and
. Two major patterns emerge. First, the authors find that kinetic
energy generation in the upper and lower atmosphere respond in
contrasting ways to surface temperature: with growing , kinetic
energy generation increases in the upper atmosphere but declines
in the lower. A requirement that kinetic energy generation must be
positive in the lower atmosphere can limit the poleward cell
extension of the Hadley cells via a relationship between and . The
limited extent of the Hadley cells necessitates the appearance of
heat pumps (Ferrel cells) circulation cells with negative work
output. These cells consume the positive work output of the Hadley
cells (heat engines) and can in theory drive the global efficiency
of an axisymmetric atmospheric circulation down to zero. Second,
the authors show that, within a cell, kinetic energy generation is
largely determined by in the upper atmosphere, and by in the
lower. By absolute magnitude, the temperature contribution is
about 10 times larger. However, since the heat pumps act as sinks
of kinetic energy in the upper atmosphere, the net kinetic energy
generation in the upper atmosphere, as well as the net impact of
surface temperature, is reduced. The authors use NCAR/NCEP and
MERRA data to verify the obtained theoretical relationships. These
observations confirm considerable cancellation between the
temperature-related sources and sinks of kinetic energy in the
upper atmosphere. Both the theoretical approach and observations
highlight a major contribution from surface pressure gradients,
rather than temperature, in the kinetic energy budget of
meridional circulation. The findings urge increased attention to
surface pressure gradients as determinants of the meridional
circulation patterns.",
doi = "10.1080/16000870.2016.1272752",
url = "http://dx.doi.org/10.1080/16000870.2016.1272752",
issn = "0280-6495",
language = "en",
targetfile = "makarieva_kinetic.pdf",
urlaccessdate = "27 abr. 2024"
}