One fundamental point on which we have at present little information of anything like a definite character is as to the number of solid particles present in our atmosphere. We know that they are very numerous, and it seems probable the number varies under different conditions of weather; but how many particles are really present under any conditions, and how the number varies, we have at present v ...[Read More]
Biomass burning birthday
Last September I spent a month in Brazil for a research project aiming to study the pollution produced by deforestation fires in the Amazon Basin. The fires are mainly started by people for agricultural needs or land clearing for buildings and infrastructure. These fires produce huge amounts of smoke that blanket vast regions of South America during the “dry” season, which can lead to ...[Read More]
Smoky summers
The past summer has seen a great deal of media coverage of fires burning across the globe. When I consider what to write about for the blog, it has often been difficult to avoid commenting on yet another instance of a fire burning somewhere. This has been especially difficult given my current research project investigates biomass burning aerosol from deforestation and agricultural fires in Brazil. ...[Read More]
Aerosols from space #1
A short post to illustrate the changing nature of aerosol in the atmosphere in terms of their spatial extent, source and properties. There are two images below showing the scene from the TERRA satellite as it passed over the Eastern Atlantic off the coast of Morocco. The first image shows the plume of smoke from wildfires from Madeira that swept through the island last weekend. The second image sh ...[Read More]
Sweeping soot out of the atmosphere
Efforts to slow the rate of global temperature rise in the 21st Century have for some time focussed on non-CO2 species or so-called ‘short-lived forcers’. As far as aerosols are concerned, black carbon (often referred to as soot) has been the main avenue to explore due to its capacity to warm the atmosphere by absorbing sunlight. Black carbon contrasts with most other aerosol species w ...[Read More]
If it wasn’t for those pesky aerosols…
Climate change is a subject that science knows a lot about; broadly, we can demonstrate that greenhouse gases have accumulated in the atmosphere over the past 200 years or so due to our burning of fossil fuels and that this has led to a rise in temperatures across the globe. However, our atmosphere is a complex beast and we have proven particularly adept at altering it. It turns out that as well a ...[Read More]