Measurements of mid-stratospheric formaldehyde from the Odin/SMR instrument
Artikel i vetenskaplig tidskrift, 2007

Measurements of mid-stratospheric formaldehyde (H2CO) have been obtained from the limb-viewing sub-millimeter radiometer (SMR) instrument aboard the Odin satellite. The analysis is based upon the only weak (808 -> 707) rotational transition line Of H2CO that can be measured by Odin/SMR at 576.7083150GHz in the band dedicated to the measurement of carbon monoxide (CO). The signal-to-noise ratio is increased by averaging about 1000 spectra within 2-km width vertical layers in the stratosphere over periods from I to 7 days and within 3 latitude bands: Southern Hemisphere (90 degrees S-45 degrees S), tropics (30 degrees S-30 degrees N), and Northern Hemisphere (45 degrees N-90 degrees N). The faint H2CO line can then be retrieved using the standard scientific ground-segment developed for the Odin/SMR measurements. The mid-stratospheric H2CO shows maxima in the tropics for every period considered (January 2006, February 2005, March 2005, and September 2005). The spring-time extra-tropical mid-strato spheric H2CO is more intense than the fall-time extra-tropical amounts. The simulations from the three-dimensional chemical- transport model Reprobus satisfactorily show these general features. (C) 2007 Elsevier Ltd. All rights reserved.

MODEL

CHLORINE MONOXIDE

MILLIMETER

PERFORMANCE

CLO

sensing

formaldehyde

OZONE

remote

satellite

RADIOMETER

stratosphere

SUBMILLIMETER

SATELLITE

spectroscopy

HETERODYNE MEASUREMENTS

inversion

radiative transfer

Författare

P. Ricaud

Universite Paul Sabatier Toulouse III

D. Alexandre

Universite Paul Sabatier Toulouse III

B. Barret

Universite Paul Sabatier Toulouse III

E. Le Flochmoen

Universite Paul Sabatier Toulouse III

E. Motte

Universite Paul Sabatier Toulouse III

G. Berthet

CNRS Centre National de la Recherche Scientifique

F. Lefévre

Université Pierre et Marie Curie (UPMC)

Donal Murtagh

Chalmers, Institutionen för radio- och rymdvetenskap

Journal of Quantitative Spectroscopy and Radiative Transfer

0022-4073 (ISSN)

Vol. 107 1 91-104

Ämneskategorier

Fysik

DOI

10.1016/j.jqsrt.2007.01.058