Update from SAG Aerosol April 27, 2011 John A. Ogren Chairman, SAG Aerosol
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1 Update from SAG Aerosol April 27, 2011 John A. Ogren Chairman, SAG Aerosol
2 Updates to List of Recommended Measurements Removed "core variable" designation Moved some variables from "intermittent" to "continuous", to reflect developments in measurement technology The revised list was submitted to the 2011 update to GAW Strategic Plan
3 GAW Aerosol Variables Continuous Column and profile Multi wavelength aerosol optical depth (AOD) Vertical distribution of aerosol backscattering and extinction Chemical (in two size fractions) Mass and major chemical components Optical coefficients at various wavelengths Light scattering and hemispheric backscattering Light absorption Physical number size distribution and total concentration Cloud condensation nuclei number concentration at various super saturations
4 GAW Aerosol Variables Continuous Column and profile Multi wavelength aerosol optical depth (AOD) Vertical distribution of aerosol backscattering and extinction Chemical (in two size fractions) Mass and Major chemical components Optical coefficients at various wavelengths Light scattering and hemispheric backscattering Light absorption Physical number size distribution and total concentration Cloud condensation nuclei number concentration at various super saturations
5 GCOS: SAG Aerosol Recommendation GCOS Essential Climate Variable currently only specifies "Aerosol Properties" SAG Aerosol recommends to elaborate this vague specification by adding another footnote to the GCOS ECV table me=essentialclimatevariables#_ftn1 The PRELIMINARY text of this footnote is: Including, but not restricted to, aerosol optical depth, light scattering and absorption coefficients, and vertical distributions of aerosol backscattering and extinction.
6 SAG Aerosol Progress Update WCC Aerosol Physics working great Site audits and training sessions WDCA transferred to NILU World Data Center for Satellite Remote Sensing is up and running S New Global stations in past year Trinidad Head, Pyramid, Monte Cimone Symposium on high altitude observatories (Switzerland, June 2010) Notable contributions from EUSAAR, will continue with ACTRIS
7 Changes in SAG Aerosol Retired SAG members Julian Wilson, JRC/Ispra (WDCA, models) Ray Hoff, USA (lidar) Yutaka Kondo, Japan (in situ) [Len Barrie] New SAG members Angela Benedetti, UK (models) Andreas Petzold, Germany (aircraft profiles, insitu) Nobuo Sugimoto, Japan (lidar) Decided not to add more members from AOD community, rely on AOD sub group instead
8 GAW Aerosol Optical Depth GAW is responsible for GCOS Essential Climate Variables for "Aerosol Properties" Aerosol optical depth is a high priority ECV GAW SAG Aerosol is developing an implementation plan for a GCOS AOD network Essential components of GCOS AOD network network of networks regional calibration facilities travelling standard (precision filter radiometer) overlap sites (multiple networks at some sites) data publication at World Data Center for Aerosols
9 GALION: GAW Aerosol Lidar Network Regular measurement scheme implemented emphasis on establishing a climatology GALION stations included in GAWSIS Special event alerting system established Second GALION workshop held in Sept participants (representatives of the lidar networks, satellite and modelling communities) 2 year implementation plan for working groups: technology and methodology quality assurance data dissemination model evaluation/data assimilation
10 Observations of the Eyjafjallajökull Ash Cloud Quicklooks made available almost in near real time on the EARLINET website
11 Activity Highlight: Near Real Time Data WDCA offers NRT data collection and dissemination for: Aerosol optical depth Particle number size distribution Aerosol scattering and sackscattering coefficient Aerosol absorption coefficient So far 39 instruments at 23 stations connected Distributed around the globe, (almost) from pole to pole
12 GAW Aerosol Web Aliases Following recommendation of SAG Aerosol, the following aliases have been established at WMO to provide a uniform naming scheme for accessing web pages not hosted at WMO sag/aerosol gawsis galion wdca wdca.org/
13 SAG Aerosol Challenges Still no WCC Aerosol Chemistry National/regional air quality networks are relied on for SOP guidance Also, no CCL or QA/SAC WCCAP ad hoc CCL and QA/SAC for aerosol physics WRC Davos providing this functionality for AOD WDCA import of legacy data, timeliness of new data submission Long overdue WMO Aerosol Bulletin Connecting AERONET to WMO/GCOS
14 Vision: Integrated Global Aerosol Observing and Analysis System Develop a three dimensional global atmospheric chemistry measurement network Develop coherent data processing chains Implement near real time delivery of a few measured parameters Assimilate data into models ocuments/gaw172 26sept07.pdf
15 Science Questions for Arctic Black Carbon What is the long term trend and interannual variability of BC in the Arctic? What sources control the trend and variability of BC in the Arctic? What is the direct radiative forcing of BC in the Arctic?
16 Arctic Black Carbon Studies What is the long term trend and inter annual variability of BC in the Arctic? PSAP, Aethalometer, EC data BRW, ALT, NYÅ evaluate potential artifacts with PAS (BRW+ALT) What sources control the trend and variability of BC in the Arctic? data analysis with FLEXPART trace element signatures at BRW and ALT What is the response of BC in the Arctic to eventual mitigation actions? begin aerosol measurements at Tiksi continue current measurements at BRW and ALT add elements+ec/oc filter sampling at BRW and TIK
17 GAW Aerosol Variables Intermittent Detailed, size fractionated, chemical composition Dependence on relative humidity
18 Aerosols: GAW Strategic Plan Progress 7.80 Finalize the development and publication of standard operating procedures (SOPs) for selected aerosol variables (mass concentration, light absorption coefficient, light scattering coefficient). UPDATE: SOP in near final draft form Task 7.81 Conduct on site audits, calibrations, comparisons and training activities related to aerosol variables. UPDATE: strong activity is continuing 7.82 Develop procedures for quality assurance, integration, delivery, and application of data from AOD networks. UPDATE: GAW PFR (Precision Filter Radiometer) network for AOD is expanding and providing data to WDCA Expect BSRN AOD data to be submitted to WDCA 7.83 Assist the development of the GAW RCC for Aerosol Optical Depth in China. UPDATE: Letter sent from WMO S.G. to China P.R. in Sept 2010
19 Aerosols: GAW Strategic Plan Progress 7.84 Through GALION, participate in the establishment and coordination of long term, high quality lidar networks worldwide for obtaining aerosol profiles. UPDATE: GALION workshop was help in Geneva Sept 2010, wellattended Identify and address gaps in global coordination of aerosol chemistry observations. still a weak part of program, largely defer recommendations to national/multinational air quality networks (e.g., USEPA, EMEP) 7.86 Enhance aerosol measurements and continue capacity building in developing countries, e.g. by twinning activities. UPDATE: WCCAP and SAG members are actively involved
20 Aerosols: GAW Strategic Plan Progress 7.87 Improve the timeliness of submission of data to the WDCA UPDATE: Need to remind GAW Members that submission of data is an essential part of GAW. Help from CAS would be appreciated Near real time measurements of a few variables from a few stations are being submitted to WDCA and delivered to ECMWF (MACC project) as a pilot project 7.88 Produce a brochure and promote the WDCA to user communities. UPDATE: priority has been given to transferring WDCA to new host (NILU) 7.89 Contribute to validation of satellite derived aerosol products with long term measurements Establish and maintain an international sand and dust storm warning system in cooperation with WWRP.
21 GAW Aerosol Observing Networks Aerosol optical depth (GAW PFR and more) In situ (microphysical, optical, chemical properties) Vertical profiling (lidar) GAW Lidar Observation Network (GALION) World Data Center for Aerosols near real time for weather and air quality forecast models final archives for long term data
22 Components of Integrated System In situ observations Surface sites, ships, aircraft, balloons Remote sensing observations Ground based and satellite Active and passive Models Weather forecasting Climate forcing predictions Air quality Synthesis Products
23 At the 5th International Workshop on Volcanic Ash, organized by WMO in cooperation with ICAO held in Santiago de Chile from 17 to 21 March 2010, the formation of a Scientific Advisory Group was proposed in order to create a single, authoritative source of scientific expertise in the field of volcanic ash affecting civil aviation with emphasis both on meteorological (remote sensing and in situ observations, transport and dispersion modeling) as well as geophysical/volcanological issues such as eruption source parameters, ash characteristics, ash fallout and aggregation. This expertise was to be made available to the relevant ICAO IAVWOPS (International airways volcano watch operations group) group as a basis for future development of operational procedures, standards and guidance. This proposal was subsequently adopted by the WMO Executive Council at its 62nd session in Geneva and fully supported by the Secretary General of IUGG. The eruption of the Icelandic volcano Eyjafjallajökull starting on 14 April 2010, leading to widespread airspace closures and unprecedented disruption to air traffic, prompted the formation of several national, regional and global groups and task forces under the egis of different governing bodies. ICAO decided to create an international Task Force on Volcanic Ash (IVATF) with the mandate to accelerate the production of guidance and standards in view of the serious effect of the aftermath of these eruptions on air traffic. The inaugural meeting of the VA SAG (Scientific Advisory Group on Volcanic Ash) was held in Montreal from 27 to 30 July Second VA SAG meeting, 8 9 April 2011, Vienna, Austria
24 EARLINET observations of the Eyjafjallajökull volcanic cloud EARLINET performed almost continuous measurements since 15 April 2010 in order to follow the evolution of the volcanic plume generated from the eruption of the Eyjafjallajökull volcano, providing the 4 dimensional distribution of the volcanic cloud over Europe. A first volcanic layer was observed in the late evening of 15 April over Hamburg at about 10 km altitude a.s.l.. In the morning of April 16, the ash plume reached Central Europe (The Netherlands, Germany and France) at 5 6 km a.sl.. In the following days volcanic ash was intercepted at lower altitudes (i.e. below 4 km). Volcanic plume transport toward South was blocked over the Alps until 20 April when Italian EARLINET stations observed for the first time a clear signature of the plume. Part of the plume continued its travel across Europe reaching Greece on 21 April. Volcanic plume was observed over Portugal and Spain (6 May) and then over Italy (8 May) and Greece (10 May). Volcanic plume was then observed again over Southern Germany on 11 May. Volcanic layers were observed also in late May : 16 over Spain, Italy and Greece until 20 May. Volcanic layers over Central Europe were observed until 21 May.
25 Strong pressure for providing near real time data EARLINET data for this volcanic events together with explanatory reports were provided regularly to the WMO and to the national authorities in the different countries.
26 Daily updated report available on the EARLINET website for the whole period 15 April 22 May 2010
27 Examples of EARLINET observations of the volcanic layer (15 23 April 2010) 21 April 2010, Athens, Greece April 2010, Paris, France 18 April 2010, Leipzig, Germany 20 April 2010, Potenza, Italy
28 Examples of EARLINET observations of the volcanic layer (5 11 May 2010) 5 May 2010, Evora, Portugal 8 May 2010, Naples, Italy 6 May 2010, Granada, Spain
29 GALION the GAW Aerosol Lidar Observation Network The objective: The GAW aerosol program strives "to determine the spatio temporal distribution of aerosol properties related to climate forcing and air quality up to multidecadal time scales". The specific objective of GALION is to provide the vertical component of this distribution through advanced laser remote sensing in a network of ground based stations. The aerosol properties to be observed include the identification of aerosol layers, profiles of optical properties (backscatter and extinction coefficients at selected wavelengths, lidar ratio, Ǻngström coefficients), aerosol type (e.g. dust, maritime, fire smoke, urban haze), and microphysical properties (e.g., volume and surface concentrations, size distribution parameters, refractive index).
30 The operation of GALION has to be designed to serve the following main areas: 1. Climate research and assessment 1.1 Global climatology 1.2 Model evaluation 1.3 Aerosol transport and tracers 1.4 Impact on radiation 2. Air quality 2.1 Air quality assessment 2.2 Air quality forecast 3. Plumes from special events 4. Support for spaceborne observations
31 GALION is organized as a Network of Networks, coordinating ALINE, Latin America AD Net, East Asia CIS LINET, Commonwealth of Independent States EARLINET, Europe NDACC, Global Stratosphere REALM, Eastern North America MPLNET, Global, Micropulse Lidar ALINE, Latin America AD Net, East Asia CIS LINET, Commonwealth of Independent States EARLINET, Europe NDACC, Global Stratosphere REALM, Eastern North America MPLNET, Global, Micropulse Lidar
32 GALION potential for NRT data delivery capability Two examples within the WMO SDS WAS (Sand and Dust Storm Warning System) NIES Lidar Network/AD Net, East Asia: assimilation of near real time data for dust forecast contact Nobuo Sugimoto EARLINET (European Aerosol Research Lidar Network): systematic comparisons for dust model evaluation within the SDS WAS NA ME EU (North Africa, Middle East and Europe) contact Gelsomina Pappalardo
33 NIES Lidar Network/AD Net, East Asia Realtime data processing system Dust event Two wavelength (1064nm, 532nm) Mie scattering lidar with polarization channels at 532nm. (Raman receivers (607nm) are being added at several observation sites.) Extinction coefficient estimates of dust (left) and spherical aerosols (right) for primary locations (March 2009).
34 NIES Lidar Network/AD Net, East Asia 4DVAR data assimilation of Asian dust using the NIES lidar network data (Yumimoto et al. 2007, 2008) Comparison of the assimilated dust transport model with CALIPSO data (Hara et al. 2009) Please see the publication list at lidar.nies.go.jp/~cml/english/publicationse.html
35 The GALION report has been published and is available at: ftp://ftp.wmo.int/documents/publicweb/arep/gaw/gaw178 galion 27 Oct.pdf Of course there are plans to harmonize "everything" among the networks, but this will take some time and be successful in part only. The important decision already made is that a regular measurement scheme is implemented for establishing a climatology, tentatively following the EARLINET scheme. A GALION mailing has been established. An alerting system for special events has been established. The second GALION workshop will be held at the WMO, Geneva, Switzerland, September This workshop will focus on the implementation of GALION mainly around four activities/working groups: i) quality assurance (for both instruments and data processing); ii) database (interoperability among the existing different lidar databases); iii) model evaluation and data assimilation; iv) validation programs for current and next satellite missions. Representatives from each contributing network will participate and a considerable attendance from both modelling and satellite communities is expected.
36 WDCA Major Challenges Import of legacy data needs to be completed (currently 60 % imported) To improve timeliness of submission, detailed formatting /submission instructions have been / are being prepared time consuming but worthwhile, timely submissons as of this year. In connecting to WIS system, missing detailed instructions (ISO profile, vocabulary, server metadata exchange protocol specification) form bottleneck. Coordination for implementing WIGOS / WIS is clearly needed.
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