MOZAIC

MOZAIC
Name	MOZAIC
Full name	Measurement of OZone and water vapor by Airbus In-service airCraft
Abbreviation	MOZAIC
Established	1994
Operators	International Civil Aviation Organization; Airbus; Lufthansa; Air France
Headquarters	Paris

MOZAIC. MOZAIC was an atmospheric science program that deployed automated instrument packages aboard commercial Airbus and other airliners to measure ozone and water vapor in the upper troposphere and lower stratosphere. The program provided systematic in situ observations from Paris, Frankfurt, London, Madrid, Munich, Rome, and transcontinental routes, filling gaps complementary to satellite missions such as ERS-2, ENVISAT, Aqua, and NOAA-19. Data contributed to studies associated with Intergovernmental Panel on Climate Change, World Meteorological Organization, and research campaigns like IPY and the Arctic Council assessments.

Overview

MOZAIC consisted of compact, certified measurement units installed on passenger aircraft operated by carriers including Lufthansa, Air France, Austrian Airlines, Air Inter, and Czech Airlines. Instruments recorded key trace gases and meteorological parameters during routine commercial flights connecting hubs such as Charles de Gaulle, Heathrow, Frankfurt Airport, Barajas, and Fiumicino. The program bridged observational capabilities between platforms like the Global Atmospheric Watch network, balloon-borne sounding systems exemplified by Meteo-France sondes, and satellite sensors such as MOPITT and TES.

History and Development

Initiated in the mid-1990s by a consortium including CNRS, Météo-France, Max Planck Institute for Chemistry, and industry partners, MOZAIC formalized instrument certification procedures with manufacturers including Airbus and airline safety regulators such as European Union Aviation Safety Agency. Early deployments began on European routes linking Orly and Nice to long-haul services to destinations like New York City, São Paulo, and Tokyo. Funding and scientific oversight involved agencies including European Commission, National Aeronautics and Space Administration, DLR, and national research councils such as CNES and UK Research and Innovation.

Scientific Objectives and Instrumentation

Mission objectives targeted tropospheric ozone, water vapor, carbon monoxide, and aerosol-relevant parameters to support studies of stratosphere-troposphere exchange, pollution transport, and radiative forcing. Instrument suites commonly included chemiluminescent ozone analyzers comparable to devices used in field campaigns such as ACE-FTS for complementary chemistry, dew-point hygrometers akin to instruments flown on HALOE, and pressure-temperature sensors similar to those in SONG. Calibration strategies referenced standards from institutions like Bureau International des Poids et Mesures and intercomparisons with platforms including Aircraft of Opportunity Program, research jets such as NASA WB-57, and ground observatories like Mace Head and Cape Grim.

Flight Operations and Data Collection

Operators integrated MOZAIC units into flight decks and avionics with approvals from aviation authorities including Federal Aviation Administration. Flights sampled vertical profiles during climb and descent and quasi-horizontal sections at cruise altitudes over regions including North Atlantic Ocean, Mediterranean Sea, Sahara Desert, and Amazon Basin. Data telemetry and archival systems interfaced with scientific data centers such as WDC nodes and research infrastructures like ICOS and GEOSS. Quality control procedures involved protocols from ECMWF and assimilation comparisons with reanalyses from ERA-Interim and ERA5.

Key Findings and Impact

MOZAIC produced landmark datasets that quantified ozone maxima in the upper troposphere over convective regions, documented water vapor variability associated with the Asian monsoon and North American monsoon, and revealed anthropogenic pollution plumes transported across basins linking Beijing emissions to downwind regions. Results influenced assessments by Intergovernmental Panel on Climate Change and informed studies on aviation radiative forcing assessed by International Civil Aviation Organization. MOZAIC data underpin peer-reviewed studies in journals affiliated with societies such as American Geophysical Union and European Geosciences Union and fed into climate model evaluation exercises led by centers like Met Office Hadley Centre and National Center for Atmospheric Research.

Collaborations and Legacy

The program fostered partnerships among airlines, research institutes including CNRS, MPI for Chemistry, LSCE, and operational agencies such as Météo-France and DLR. MOZAIC principles guided successor initiatives including IAGOS and inspired airborne measurement strategies used in campaigns like HIPPO and ATTREX. Its archived records remain accessible through data repositories coordinated with entities like PANGAEA and informed policy dialogues at forums including United Nations Framework Convention on Climate Change meetings and ICAO environmental panels. The legacy persists in standardized airborne observing practices adopted by universities such as Université Pierre et Marie Curie and national laboratories such as Laboratoire des Sciences du Climat et de l'Environnement.

Category:Atmospheric monitoring Category:Airborne science projects