It is the duty of the German Environment Agency air monitoring network to accomplish the German monitoring obligations, which result either from the signing of international agreemens (e.g. UN ECE Convention on long range transboundary air pollution) or from the EU legislation. Measuring programs, measurement parameters, measurement methods are specified and are developed by experts in international working groups.

There is no measurement need for the German Environmental Agency air monitoring network regarding the paramters (aluminium, barium, strontium) you mentioned.

List of planes

List of the planes that produced a man made cloud cover over Bern, Switzerland in 2009.

SUCCES study 1996 (NASA)

IN (ice nucleating particles) sampled within aircraft exhaust and contrails had higher number fractions of metallic particles, which includes those rich in Zn, Al and Ti than the IN sampled in air that was not immediately affected by aircraft exhaust.

Atmospheric Aerosol Properties and Climate Impact

U.S. Climate Change Science Program 2009

Changes in cloud cover, in cloud vertical development, and cloud optical properties will have strong radiative and therefore, climatic impacts. Furthermore, factors that change cloud development will also change precipitation processes. These changes may alter amounts, locations and intensities of local and regional rain and snowfall, creating droughts, floods and severe weather.

Inadvertent climate modification due to anthropogenic lead

in: Nature Geoscience, April 2009

Aerosol particles can interact with water vapour in the atmosphere, facilitating the condensation of water and the

formation of clouds. At temperatures below 273 K, a fraction

of atmospheric particles act as sites for ice-crystal formation.

Atmospheric ice crystals—which are incorporated into clouds

that cover more than a third of the globe are thought

to initiate most of the terrestrial precipitation


System and Method of Control of the Terrestrial Climate and its Protection against Warming and Climatic Catastrophes Caused by Warming such as Hurricanes 2009


This system of the control and protection of the terrestrial climate relies mainly on civilian airlines burning (preferably price-subsidized) sun-shading (sun-blocking/sun-reflective) fuels in the high levels of the atmosphere in order to reduce the intensity of the solar radiation reaching the Earth's surface. The use of sun-blocking airline fuels for the protection of the Earth from solar radiation parallels the use of sun-blocking skin-creams for the protection of the individual.

Welsbach Patent

Stratospheric Welsbach Seeding for Reduction of Global Warming 1990


One proposed solution to the problem of global warming involves the seeding of the atmosphere with metallic particles.

One technique proposed to seed the metallic particles was to add the tiny particlesto the fuel of jet airliners, so that the particles would be emitted from jet engine exhaust while the airliner was at its crusing altitude. 

Global Warming and Ice Ages: I. Prospects for Physics-Based Modulation of Global Change

Edward Teller, L. Wood, R. Hyde

The potential economic impacts of such limitations are obviously large: ≥$10 Billions/year. We propose that for far smaller — <1% —costs, the mean thermal effects of "greenhouse gases" may be obviated in any of several distinct ways, some of them novel. These suggestions are all based on scatterers that prevent a small

fraction of solar radiation from reaching all or part of the Earth.

Unilateral Geoengineering

Non-technical Briefing Notes for a Workshop At the Council on Foreign Relations Washington DC, May 05, 2008

This workshop will focus on the question of strategies for constraining and shaping geoengineering. We will explore formal, legal strategies as well as informal efforts to create norms that could govern testing and deployment of geoengineering systems and their possible undesirable consequences.

Benefits, risks, and costs of stratospheric geoengineering 2009

Anthropogenic stratospheric aerosol injection would cool the planet, stop the melting of sea ice and land-based glaciers, slow sea level rise, and increase the terrestrial carbon sink, but produce regional drought, ozone depletion, less sunlight for solar power, and make skies less blue. Furthermore it would hamper Earth based optical astronomy, do nothing to stop ocean acidification, and present many ethical and moral issues.

Geoengineering the climate

Science, governance and uncertainty September 2009

This report opened the path for Geoengineering in the established science.




March 2009 Number 327

Parliamentary Office of Science and Technology.

Future Topic Geoengineering 2012

Planungsamt der Bundeswehr, Dezernat Zukunftsanalyse (Future Analysis of the German armed forces on Geoengineering)

It is the international law, which is decisive for the legal assessment of the implementation of Geoengineering, due to its potential global side effects. But there is neither a binding definition (about Geoengineering) nor a direct regulation or even less a prohibition by now.

House of Commons Science and Technology Committee

The Regulation of Geoengineering

Fifth Report of Session 2009–10

The History of Artificial Clouds: How to Geoengineer a Planet with Jet Fuel written by Jim Lee

Dietrich Klinghardt talks about the health effects of Chemtrails

Global Research Article on the consequences of toxic metals and chemicals aerosols

A great collection of links made by Franz Miller, an Austrian paraglider and Environmental Activist.


A very good homepage from Dave Dahl, a  former Navy swimmer and navigator, dealing with the phenomenon

Activist sites


Scientific research on contrails

Great source to look for scientific studies:

German Center for Aerospace