TY - JOUR
T1 - Wind measurements in Mars' middle atmosphere
T2 - IRAM Plateau de Bure interferometric CO observations
AU - Moreno, R.
AU - Lellouch, E.
AU - Forget, F.
AU - Encrenaz, T.
AU - Guilloteau, S.
AU - Millour, E.
PY - 2009/6/1
Y1 - 2009/6/1
N2 - The IRAM Plateau de Bure Interferometer has been used to map the CO(1-0) rotational line in Mars' middle atmosphere. Absolute winds and thermal profiles were retrieved during the 1999, 2001, 2003 and 2005 planet's oppositions. The observations sampled various seasons (Ls = 143, 196, 262, 317 and 322), and different dust situations (clear, global storm, regional storm). The absolute winds were derived by measuring directly the Doppler lineshifts. The main zonal circulation near 50 km is dominated by strong retrograde winds, with typical velocities of 70-170 m/s, strongly varying seasonally, latitudinally, and longitudinally (in particular between morning and evening). Comparison of the retrieved temperature with a general circulation model indicates that the model often underestimates the temperatures in the middle (20-50 km) atmosphere, and overestimates them above 50 km.
AB - The IRAM Plateau de Bure Interferometer has been used to map the CO(1-0) rotational line in Mars' middle atmosphere. Absolute winds and thermal profiles were retrieved during the 1999, 2001, 2003 and 2005 planet's oppositions. The observations sampled various seasons (Ls = 143, 196, 262, 317 and 322), and different dust situations (clear, global storm, regional storm). The absolute winds were derived by measuring directly the Doppler lineshifts. The main zonal circulation near 50 km is dominated by strong retrograde winds, with typical velocities of 70-170 m/s, strongly varying seasonally, latitudinally, and longitudinally (in particular between morning and evening). Comparison of the retrieved temperature with a general circulation model indicates that the model often underestimates the temperatures in the middle (20-50 km) atmosphere, and overestimates them above 50 km.
KW - Atmosphere
KW - Mars
KW - dynamics
U2 - 10.1016/j.icarus.2009.01.027
DO - 10.1016/j.icarus.2009.01.027
M3 - Article
AN - SCOPUS:67349202810
SN - 0019-1035
VL - 201
SP - 549
EP - 563
JO - Icarus
JF - Icarus
IS - 2
ER -