English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) onboardthe ENVISAT satellite provides profiles of temperature and varioustrace-gases from limb-viewing mid-infrared emission measurements. Thestratospheric nitric acid (HNO3) from September 2002 to March 2004was retrieved from the MIPAS observations using the science-oriented dataprocessor developed at the Institut für Meteorologie und Klimaforschung(IMK), which is complemented by the component of non-local thermodynamicequilibrium (non-LTE) treatment from the Instituto de Astrofísica deAndalucía (IAA). The IMK-IAA research product, different from the ESAoperational product, is validated in this paper by comparison with a numberof reference data sets. Individual HNO3 profiles of the IMK-IAA MIPASshow good agreement with those of the balloon-borne version of MIPAS(MIPAS-B) and the infrared spectrometer MkIV, with small differences of lessthan 0.5 ppbv throughout the entire altitude range up to about 38 km, and below 0.2 ppbv above 30 km. However, the degreeof consistency is largely affected by their temporal and spatial coincidence,and differences of 1 to 2 ppbv may be observed between 22 and 26 km at high latitudes near the vortex boundary, due to large horizontalinhomogeneity of HNO3. Statistical comparisons of MIPAS IMK-IAAHNO3 VMRs with respect to those of satellite measurements ofOdin/SMR, ILAS-II, ACE-FTS, as well as the MIPAS ESA product show goodconsistency. The mean differences are generally ±0.5 ppbv andstandard deviations of the differences are of 0.5 to 1.5 ppbv. Themaximum differences are 2.0 ppbv around 20 to 25 km. This givesconfidence in the general reliability of MIPAS HNO3 VMR data and theother three satellite data sets

Validation of nitric acid retrieved by the IMK-IAA processor from MIPAS/ENVISAT measurements