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Workshop on Aircraft Observing System Data Management: final report
The Workshop on Aircraft Observing System Data Management was hosted by the WMO Secretariat, over 5-8 June, 2012, in Geneva, Switzerland. The Workshop was a joint initiative of the WMO AMDAR Panel and the CBS Expert Team on Aircraft-based Observations (ET-AIR). The aims and objectives, which are provided in full within Appendix II, were chiefly concerned with furthering two tasks within the WIGOS Pilot Project for AMDAR, namely the “Development of a standardised Quality Management Framework for AMDAR data”, and, the “Application of WMO Metadata relevant to AMDAR”. The Workshop also covered a n ...World Meteorological Organization (WMO)
Event: Workshop on Aircraft Observing System Data Management (5-8 June 2012; Geneva, Switzerland)
Published by: WMO ; 2012The Workshop on Aircraft Observing System Data Management was hosted by the WMO Secretariat, over 5-8 June, 2012, in Geneva, Switzerland. The Workshop was a joint initiative of the WMO AMDAR Panel and the CBS Expert Team on Aircraft-based Observations (ET-AIR). The aims and objectives, which are provided in full within Appendix II, were chiefly concerned with furthering two tasks within the WIGOS Pilot Project for AMDAR, namely the “Development of a standardised Quality Management Framework for AMDAR data”, and, the “Application of WMO Metadata relevant to AMDAR”. The Workshop also covered a number of related issues and aspects which were considered to be important in the ongoing responsibility of developing and maintaining a Quality Management Framework for the aircraft observing system, as a subsystem of WIGOS.
Language(s): English
Format: Digital (Free)Tags: Information management ; WMO Integrated Global Observing System (WIGOS) ; Aircraft ascent, aircraft sounding ; Global Observing System (GOS)
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Joint Meeting of WMO AMDAR Panel (14th Session) and WMO CBS/Expert Team on Aircraft Observations (3rd Session): final report
Joint Meeting of WMO AMDAR Panel (14th Session) and WMO CBS/Expert Team on Aircraft Observations (3rd Session): final report
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World Meteorological Organization (WMO)
Event: Event: Joint Meeting of WMO AMDAR Panel 14th session (2-4 November 2011; Quebec City, Canada) ; Event: WMO CBS/Expert Team on Aircraft Observations 3rd session (2-4 November 2011; Quebec City, Canada)
Published by: WMO ; 2012Language(s): English
Format: Digital (Free)Tags: Capacity development ; Aeronautical meteorology ; Aircraft ascent, aircraft sounding
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African biomass burning plumes over the Atlantic: aircraft based measurements and implications for H2SO4 and HNO3 mediated smoke particle activation
Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Fiedler V.; Arnold F.; Ludmann S.; et al. - Copernicus GmbH, 2011Airborne measurements of trace gases and aerosol particles have been made in two aged biomass burning (BB) plumes over the East Atlantic (Gulf of Guinea). The plumes originated from BB in the Southern-Hemisphere African savanna belt. On the day of our measurements (13 August 2006), the plumes had ages of about 10 days and were respectively located in the middle troposphere (MT) at 3900–5500 m altitude and in the upper troposphere (UT) at 10 800–11 200 m. Probably, the MT plume was lifted by dry convection and the UT plume was lifted by wet convection. In the more polluted MT-plume, numerous me ...[article]African biomass burning plumes over the Atlantic: aircraft based measurements and implications for H2SO4 and HNO3 mediated smoke particle activation
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Available online: http://dx.doi.org/10.5194/acp-11-3211-2011
V. Fiedler ; F. Arnold ; S. Ludmann ; A. Minikin ; T. Hamburger ; L. Pirjola ; A. Dörnbrack ; H. Schlager
in Atmospheric Chemistry and Physics (ACP) > Vol. 11. N° 7 [04/01/2011] . - p.3211-3225Airborne measurements of trace gases and aerosol particles have been made in two aged biomass burning (BB) plumes over the East Atlantic (Gulf of Guinea). The plumes originated from BB in the Southern-Hemisphere African savanna belt. On the day of our measurements (13 August 2006), the plumes had ages of about 10 days and were respectively located in the middle troposphere (MT) at 3900–5500 m altitude and in the upper troposphere (UT) at 10 800–11 200 m. Probably, the MT plume was lifted by dry convection and the UT plume was lifted by wet convection. In the more polluted MT-plume, numerous measured trace species had markedly elevated abundances, particularly SO2 (up to 1400 pmol mol−1), HNO3 (5000–8000 pmol mol−1) and smoke particles with diameters larger than 270 nm (up to 2000 cm−3). Our MT-plume measurements indicate that SO2 released by BB had not experienced significant loss by deposition and cloud processes but rather had experienced OH-induced conversion to gas-phase sulfuric acid. By contrast, a significant fraction of the released NOy had experienced loss, most likely as HNO3 by deposition. In the UT-plume, loss of NOy and SO2 was more pronounced compared to the MT-plume, probably due to cloud processes. Building on our measurements and accompanying model simulations, we have investigated trace gas transformations in the ageing and diluting plumes and their role in smoke particle processing and activation. Emphasis was placed upon the formation of sulfuric acid and ammonium nitrate, and their influence on the activation potential of smoke particles. Our model simulations reveal that, after 13 August, the lower plume traveled across the Atlantic and descended to 1300 m and hereafter ascended again. During the travel across the Atlantic, the soluble mass fraction of smoke particles and their mean diameter increased sufficiently to allow the processed smoke particles to act as water vapor condensation nuclei already at very low water vapor supersaturations of only about 0.04%. Thereby, aged smoke particles had developed a potential to act as water vapor condensation nuclei in the formation of maritime clouds.
Language(s): English
Format: Digital (Free)Tags: Region I - Africa ; Atlantic Ocean ; Atmospheric circulation ; Biomass burning experiment ; Plume ; Aircraft ascent, aircraft sounding
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Evaluating a 3-D transport model of atmospheric CO2 using ground-based, aircraft, and space-borne data
Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Feng L.; Palmer P.I.; Yang Y.; et al. - Copernicus GmbH, 2011We evaluate the GEOS-Chem atmospheric transport model (v8-02-01) of CO2 over 2003–2006, driven by GEOS-4 and GEOS-5 meteorology from the NASA Goddard Global Modeling and Assimilation Office, using surface, aircraft and space-borne concentration measurements of CO2. We use an established ensemble Kalman Filter to estimate a posteriori biospheric+biomass burning (BS + BB) and oceanic (OC) CO2 fluxes from 22 geographical regions, following the TransCom-3 protocol, using boundary layer CO2 data from a subset of GLOBALVIEW surface sites. Global annual net BS + BB + OC CO2 fluxes over 2004–2006 for ...[article]Evaluating a 3-D transport model of atmospheric CO2 using ground-based, aircraft, and space-borne data
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Available online: http://dx.doi.org/10.5194/acp-11-2789-2011
L. Feng ; P.I. Palmer ; Y. Yang ; R.M. Yantosca ; S.R. Kawa ; J.-D. Paris ; H. Matsueda ; T. Machida
in Atmospheric Chemistry and Physics (ACP) > Vol. 11. N° 3 [03/01/2011] . - p.2789-2803We evaluate the GEOS-Chem atmospheric transport model (v8-02-01) of CO2 over 2003–2006, driven by GEOS-4 and GEOS-5 meteorology from the NASA Goddard Global Modeling and Assimilation Office, using surface, aircraft and space-borne concentration measurements of CO2. We use an established ensemble Kalman Filter to estimate a posteriori biospheric+biomass burning (BS + BB) and oceanic (OC) CO2 fluxes from 22 geographical regions, following the TransCom-3 protocol, using boundary layer CO2 data from a subset of GLOBALVIEW surface sites. Global annual net BS + BB + OC CO2 fluxes over 2004–2006 for GEOS-4 (GEOS-5) meteorology are −4.4 ± 0.9 (−4.2 ± 0.9), −3.9 ± 0.9 (−4.5 ± 0.9), and −5.2 ± 0.9 (−4.9 ± 0.9) PgC yr−1, respectively. After taking into account anthropogenic fossil fuel and bio-fuel emissions, the global annual net CO2 emissions for 2004–2006 are estimated to be 4.0 ± 0.9 (4.2 ± 0.9), 4.8 ± 0.9 (4.2 ± 0.9), and 3.8 ± 0.9 (4.1 ± 0.9) PgC yr−1, respectively. The estimated 3-yr total net emission for GEOS-4 (GEOS-5) meteorology is equal to 12.5 (12.4) PgC, agreeing with other recent top-down estimates (12–13 PgC). The regional a posteriori fluxes are broadly consistent in the sign and magnitude of the TransCom-3 study for 1992–1996, but we find larger net sinks over northern and southern continents. We find large departures from our a priori over Europe during summer 2003, over temperate Eurasia during 2004, and over North America during 2005, reflecting an incomplete description of terrestrial carbon dynamics. We find GEOS-4 (GEOS-5) a posteriori CO2 concentrations reproduce the observed surface trend of 1.91–2.43 ppm yr−1 (parts per million per year), depending on latitude, within 0.15 ppm yr−1 (0.2 ppm yr−1) and the seasonal cycle within 0.2 ppm (0.2 ppm) at all latitudes. We find the a posteriori model reproduces the aircraft vertical profile measurements of CO2 over North America and Siberia generally within 1.5 ppm in the free and upper troposphere but can be biased by up to 4–5 ppm in the boundary layer at the start and end of the growing season. The model has a small negative bias in the free troposphere CO2 trend (1.95–2.19 ppm yr−1) compared to AIRS data which has a trend of 2.21–2.63 ppm yr−1 during 2004–2006, consistent with surface data. Model CO2 concentrations in the upper troposphere, evaluated using CONTRAIL (Comprehensive Observation Network for TRace gases by AIrLiner) aircraft measurements, reproduce the magnitude and phase of the seasonal cycle of CO2 in both hemispheres. We generally find that the GEOS meteorology reproduces much of the observed tropospheric CO2 variability, suggesting that these meteorological fields will help make significant progress in understanding carbon fluxes as more data become available.
Language(s): English
Format: Digital (Free)Tags: Atmosphere ; Atmospheric circulation ; Carbon dioxide (CO2) ; Modelling ; Research ; Satellite ; Aircraft ascent, aircraft sounding
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Published by: WMO ; 1988
Notes: A contribution to the Global Environmental System (GEMS)
Collection(s) and Series: GAW Report- No. 28
Language(s): English
Format: Hard copyTags: Environment and landscape ; Air pollution ; Aircraft ascent, aircraft sounding ; Global Atmosphere Watch Programme (GAW) ; Environmental Pollution Monitoring and Research Programme (EPMRP)
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GATE Report, 18. Report on the field phase of the GARP Atlantic Tropical Experiment Aircraft Mission Summary
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU); International Scientific and Management Group (ISMG) - WMO, 1975Permalink![]()
GATE Report, 11. Aircraft plan for the GARP Atlantic Tropical Experiment: International operations plan, part III
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU) - WMO, 1974Permalink![]()
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Commission for Instruments and Methods of Observation (CIMO). Lower troposphere soundings : (report of a working group of the Commission for Instruments and Methods of Observation)
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High-level forecasting for turbine-engined aircraft operations over Africa and the Middle East : proceedings of the Joint ICAO/WMO Seminar
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