6.5 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Atmospheric chemistry observational databases | 1/2 | https://en.wikipedia.org/wiki/Atmospheric_chemistry_observational_databases | reference | science, encyclopedia | 2026-05-05T08:19:32.580210+00:00 | kb-cron |
Over the last two centuries many environmental chemical observations have been made from a variety of ground-based, airborne, and orbital platforms and deposited in databases. Many of these databases are publicly available. All of the instruments mentioned in this article give online public access to their data. These observations are critical in developing our understanding of the Earth's atmosphere and issues such as climate change, ozone depletion and air quality. Some of the external links provide repositories of many of these datasets in one place. For example, the Cambridge Atmospheric Chemical Database, is a large database in a uniform ASCII format. Each observation is augmented with the meteorological conditions such as the temperature, potential temperature, geopotential height, and equivalent PV latitude.
== Ground-based and balloon observations == NDSC observations. The Network for the Detection for Stratospheric Change (NDSC) is a set of high-quality remote-sounding research stations for observing and understanding the physical and chemical state of the stratosphere. Ozone and key ozone-related chemical compounds and parameters are targeted for measurement. The NDSC is a major component of the international upper atmosphere research effort and has been endorsed by national and international scientific agencies, including the International Ozone Commission, the United Nations Environment Programme (UNEP), and the World Meteorological Organization (WMO). The primary instruments and measurements are: Ozone lidar (vertical profiles of ozone from the tropopause to at least 40 km altitude; in some cases tropospheric ozone will also be measured). Temperature lidar (vertical profiles of temperature from about 30 to 80 km). Aerosol lidar (vertical profiles of aerosol optical depth in the lower stratosphere). Water vapor lidar (vertical profiles of water vapor in the lower stratosphere). Ozone microwave (vertical profiles of stratospheric ozone from 20 to 70 km). H2O microwave (vertical profiles water vapor from about 20 to 80 km). ClO microwave (vertical profiles of ClO from about 25 to 45 km, depending on latitude). Ultraviolet/Visible spectrograph (column abundance of ozone, NO2, and, at some latitudes, OClO and BrO). Fourier Transform Infrared spectrometer (column abundances of a broad range of species including ozone, HCl, NO, NO2, ClONO2, and HNO3). MkIV observations. The MkIV Interferometer is a Fourier Transform Infra-Red (FTIR) Spectrometer, designed and built at the Jet Propulsion Laboratory in 1984, to remotely sense the composition of the Earth's atmosphere by the technique of solar absorption spectrometry. This was born out of concern that man-made pollutants (e.g. chlorofluorocarbons, aircraft exhaust) might perturb the ozone layer. Since 1984, the MkIV Interferometer has participated in 3 NASA DC-8 polar aircraft campaigns, and has successfully completed 15 balloon flights. In addition, the MkIV Interferometer made over 900 days of ground-based observations from many different locations, including McMurdo, Antarctica in 1986. Sonde observations. The World Ozone and Ultraviolet Radiation Data Centre (WOUDC) is one of five World Data Centres which are part of the Global Atmosphere Watch (GAW) programme of the World Meteorological Organization (WMO). The WOUDC is operated by the Experimental Studies Division of the Meteorological Service of Canada (MSC) — formerly Atmospheric Environment Service (AES), Environment Canada and is located in Toronto. The WOUDC began as the World Ozone Data Centre (WODC) in 1960 and produced its first data publication of Ozone Data for the World in 1964. In June 1992, the AES agreed to a request from the WMO to add ultraviolet radiation data to the WODC. The Data Centre has since been renamed to the World Ozone and Ultraviolet Radiation Data Centre (WOUDC) with the two component parts: the WODC and the World Ultraviolet Radiation Data Centre (WUDC).
== Airborne observations == Aircraft observations. Many aircraft campaigns have been conducted as part of the Suborbital Science Program and by the Earth Science Project Office an overview of these campaigns is available. The data can be accessed from the Earth Science Project Office archives. MOZAIC observations. The MOZAIC program (Measurement of OZone and water vapour by AIrbus in-service airCraft) was initiated in 1993 by European scientists, aircraft manufacturers and airlines to collect experimental data. Its goal is to help understand the atmosphere and how it is changing under the influence of human activity, with particular interest in the effects of aircraft. MOZAIC consists of automatic and regular measurements of ozone and water vapour by five long range passenger airliners flying all over the world. The aim is to build a large database of measurements to allow studies of chemical and physical processes in the atmosphere, and hence to validate global chemistry transport models. MOZAIC data provide, in particular, detailed ozone and water vapour climatologies at 9–12 km where subsonic aircraft emit most of their exhaust and which is a very critical domain (e.g. radiatively and S/T exchanges) still imperfectly described in existing models. This will be valuable to improve knowledge about the processes occurring in the upper troposphere/ lower stratosphere (UT/LS), and the model treatment of near tropopause chemistry and transport. The MOZAIC data is restricted access, to obtain access the forms need to be filled out. CARIBIC observations. The CARIBIC (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container) project is an innovative scientific project to study and monitor important chemical and physical processes in the Earth's atmosphere. Detailed and extensive measurements are made during long distance flights on board the Airbus A340-600 "Leverkusen" (http://www.flightradar24.com/data/airplanes/D-AIHE/). We deploy an airfreight container with automated scientific apparatuses, which are connected to an air and particle (aerosol) inlet underneath the aircraft. In contrast to MOZAIC, CARIBIC is only installed on one aircraft, but it measures a much wider spectrum of atmospheric constituents (CARIBIC -> instrumentation). Both, CARIBIC and MOZAIC are integrated in IAGOS. Data exist from 1998-2002 and from 2004-today. It can be requested via CARIBIC -> data access.