Computer Science – Sound
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa33a..01r&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA33A-01
Computer Science
Sound
[0340] Atmospheric Composition And Structure / Middle Atmosphere: Composition And Chemistry, [0341] Atmospheric Composition And Structure / Middle Atmosphere: Constituent Transport And Chemistry, [0342] Atmospheric Composition And Structure / Middle Atmosphere: Energy Deposition, [0350] Atmospheric Composition And Structure / Pressure, Density, And Temperature
Scientific paper
The primary science goal of the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) experiment on the TIMED satellite is to achieve major advances in understanding the structure, energetics, chemistry, and dynamics in the atmospheric region extending from 60 to 180 km altitude. The SABER instrument has been observing the atmosphere nearly continuously since data collection began in January of 2002 using the technique of spectral broadband limb emission radiometry applied in 10 infrared spectral bands ranging from 1.27 to 17μm. Four bands - three in the 15μm band and one in the 4.3μm band of CO2, are used to retrieve temperature and CO2 concentrations and to correct retrievals for spacecraft motion effects. The remaining bands are used to retrieve O3, H2O, [O], [H],and energetics parameters, and to measure atmospheric heating and cooling. The measured limb emission profiles are being processed on the ground to provide vertical temperature, constituent and other parameter profiles with 2 km altitude resolution. Measurements are made both night and day over the latitude range from 52 degrees to 83 degrees with alternating hemisphere coverage every 60 days. During the time SABER has been operating, many solar storms have occurred and data have been collected over the range from solar maximum in 2002 to the 2009 solar minimum and up to the present day. The temporal and geographic coverage provided by SABER has provided path finding observations on the atmospheric effects of these events. In addition, the battery of measurements made by SABER has yielded new information on atmospheric energetics effects over the solar cycle including radiative cooling due to the 15μm CO2 and 5.3μm NO bands. Numerous synergistic science studies have been conducted with data from the AIM satellite that is dedicated to the study of noctilucent clouds (NLCs) including the driving parameters that control the start and end of the NLC season, the relationship between temperature, H2O and NLC occurrence, the effects of gravity waves on NLC occurrence, observation of the 2-day wave and its effect on NLCs, demonstration of hemispheric dynamical coupling that affects NLC formation and particle size using SABER temperatures, and the role of the mesopause in controlling the altitude of the NLC maximum extinction. This paper summarizes key dynamics, chemistry and energetics results from SABER obtained over the last nearly a decade using illustrative examples.
Mlynczak Martin G.
Russell James M.
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