 |
| Titel |
Retrieval of atmospheric parameters and radiative properties using Far-Infrared remote sensing measurements |
| VerfasserIn |
Maryam Jamali, Mathias Milz, Javier Martín-Torres, Luca Palchetti |
| Konferenz |
EGU General Assembly 2016
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250129457
|
| Publikation (Nr.) |
 EGU/EGU2016-9574.pdf |
|
|
|
|
|
| Zusammenfassung |
| The far-infrared (FIR) spectral region, covering wavelengths between 15 μm (667 cm−1) and
about 1 μm (10,000 cm−1) plays a critical role in the climate system. A good knowledge of
the radiation processes in this spectral region is of high interest for observations and
understanding of heating and cooling rates, and global energy balance. Even though
approximately 50% of terrestrial radiation occurs in the FIR and despite the critical FIR
contribution to the Earth’s energy balance, this spectral region has been only studied by a few
number of instruments. Also the full FIR spectral region has not ever been directly observed
from space.
High spectral resolution observations in this region can help to enlighten its role for the
global energy budget and atmospheric radiation processes. Among others, the reasons for
this lack of measurements are: (i) the decreasing intensity of the radiation towards
longer wavelengths; and, then (ii) the high sensitivity and cooling of the detectors
requirements. These requirements are now overcome and future space missions will
have the capability to measure the full FIR and then open fully one-half of the
Earth’s spectrum, and accordingly improve our ability to model and assess climate
processes.
The aim of the study is to assess the use of FIR remote sensing instruments
for retrievals of atmospheric parameters and radiative properties such as heating
and cooling rates. Case studies with simulated spectra, together with ground based
measurements in the FIR at Dome C over the Antarctic Plateau at 3,230 m a.s.l.
(above sea level) in clear-sky conditions, which been observed almost continuously
since 2012, are used to assess the potential of remote sensing instruments in the
far-infrared region. Appropriate selection of spectral channels to directly measure
the far-infrared spectra as needed for future space missions and recommended. |
|
|
|
|
|
|