Question? How can you build a perspective on a model, AND, then physically measure, a geoengineered cirrus cloud...if it doesnt exist? :o A Lagrangian perspective of modelling and measurements of natural and geoengineered cirrus clouds e-collection.library.ethz.ch/view/eth:6243 ---- A Lagrangian Perspective of Modelling and Measurements of Natural and Geoengineered Cirrus Clouds A dissertation submitted to the ETH ZURICH for the degree of Doctor of Sciences presented by ANA CIRISAN MSc Env. Sc. born 18 August 1981 citizen of Serbia (SRB), accepted on the recommendation of Prof. Dr. Thomas Peter, examiner/ Prof. Dr. Peter Spichtinger, co-examiner/ Prof. Dr. Ulrike Lohmann and Prof. Dr. Andrew Gettelman, co-examiner Detailed investigation of changes in microphysical properties of cirrus clouds using a spectral box model were performed within the framework of the second project related to the potential impact of geoengineering on cirrus clouds in the Northern hemisphere mid-latitudes. e-collection.library.ethz.ch/eserv/eth:6243/eth-6243-01.pdf -------------------- A chemical transport model (CTM) is a type of computer numerical model which typically simulates atmospheric chemistry. Methodologies Jacob (1999) classifies CTMs as Eulerian/box or Lagrangian/puff models, depending on whether the CTM in question focuses on: -(Eulerian) boxes through which fluxes, and in which chemical production/loss and deposition occur over time -(Lagrangian) the production and motion of parcels of air (puffs) over time An Eulerian CTM solves its continuity equations using a global/fixed frame of reference, while a Lagrangian CTM uses a local/moving frame of reference. en.wikipedia.org/wiki/Chemical_transport_model - geoengineering chemical transport modelling: https://google/search?q=geoengineering+chemical+transport+modelling&oq=geoengineering+chemical+transport+modelling&aqs=chrome..69i57j69i59.1069j0j9&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8 scholar.google/scholar?q=geoengineering+chemical+transport+modelling&hl=en&as_sdt=0&as_vis=1&oi=scholart&sa=X&ei=4jM1U7Mw8dCxBO7-gKgL&ved=0CCYQgQMwAA - cloud seeding chemical transport modelling: https://google/search?q=cloud+seeding+chemical+transport+modelling&oq=cloud+seeding+chemical+transport+modelling&aqs=chrome..69i57j69i59.1051j0j9&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8 - weather modification chemical transport modelling: https://google/search?q=cloud+seeding+chemical+transport+modelling&oq=cloud+seeding+chemical+transport+modelling&aqs=chrome..69i57j69i59.1051j0j9&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8#q=weather+modification+chemical+transport+modelling - [PDF] WEATHER MODIFICATION PROGRAMME REPORTS 1 ... - WMO wmo.int/.../wmpreports.pdf World Meteorological Organization Notes for the International Cloud Modelling Workshop/Conference (Irsee, ... Group on Physics and Chemistry of Clouds and Weather Modification ... WMO Meeting of Experts on the Role of Clouds in the Chemistry, Transport, Transformation. WMO Meeting of Experts on the Role of Clouds in the Chemistry, Transport, Transformation and Deposition of Pollutants (Obninsk, 30 September – 4 October 1991) (TD No. 448) wmo.int/pages/prog/arep/wwrp/new/documents/wmpreports.pdf - Physics and Chemistry of Clouds and Weather Modification Research Programme Objectives The main objective of the Programme on Physics and Chemistry of Clouds and Weather Modification Research is to provide guidance to Members on the rationale underlying all aspects of weather modification and on the promotion of research of the physics and chemistry of clouds and of their applications to all fields of atmospheric sciences. Research focuses upon the physics and chemistry of clouds with reference to weather prediction, weather modification and atmospheric composition and pollution. Research into the role of clouds in chemical transportation of pollutants, as well as their precipitation processes is also featured in the programme. Achievements Between 1979-1981 field studies of a WMO-managed Precipitation Enhancement Project (PEP) were conducted, which contributed significantly to the development of an international consensus on precipitation enhancement. The 34 reports published regarding PEP are sought-after references for the scientific basis upon which activities and decisions concerning weather modification are based today wmo.int/pages/about/wmo50/e/wmo/today_pages/physics_chemistry_e.html - Potential Application of WRF/Chem to Weather Modification Problems Also, there has been some discussion of numerical model studies in recent journal articles that suggest the intensity and/or the path of hurricanes could be changed through the introduction of aerosols into or near the storm. By carefully targeting the location and amount of released aerosols, the amount of absorbed shortwave radiation and clouds could be modified. The resulting changes to the environmental temperature, relative humidity, cloud cover, precipitation subsequently changing the intensity and path of the storm. Additional studies need to be conducted in which released particulate transport is combined with background pollution. In addition, both the direct and indirect effects of atmospheric aerosols should be included in the study so that the cloud properties and evolution are considered. These fully-interactive numerical studies examining the effects of seeding necessitate the use of “online” chemistry. https://ams.confex/ams/17WModWMA/techprogram/paper_139165.htm _______________
Posted on: Fri, 28 Mar 2014 09:13:19 +0000
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