There is no science without coffee

Ethiopian Coffee

Without coffee, there is no science

I write this at 8am on a Sunday in a bustling airport in Addis Ababa, with a few hours to spare before my connecting flight. I had intended to prepare a background post outlining the plan for the field work and the wider project, but doing  anything non-essential in the run-up to the trip proved a little over-ambitious.

A colleague and I are flying out to Entebbe, which is on Lake Victoria in Uganda, about 30km away from Kampala, to join the rest of the detachment team to work on the FAAM research aircraft. We took a red-eye flight from London and as a result I really needed the excellent Ethiopian coffee I just finished. We were supposed to start the research flights tomorrow, but the final sign off has not yet been obtained from the local officials – not for want of trying! So instead, today is a “hard down day”, meaning no access to the research aircraft at all, because without the sign off, we can’t get airborne.

So Monday will be used to get all the instruments up and ready while the aircraft remains on the ground and hopefully Tuesday we will get airborne. We really have a packed schedule, as we are only doing MOYA flights Tuesday to Friday and then one more on Tuesday next week (another project called HyVic is flying over Lake Victoria on the intervening days). The shorter detachment saves on costs, but means we are at the mercy of the weather. To make sure we can fly every day we have several different flight options to choose from: Lake Victoria, Lake Kyoga, Lake Wamala and wildfires in northern Uganda. We will pick one of these based on which location has the best weather conditions, and fingers crossed we have time to do 2 of each. We also hope to circuit Kampala to sample the city’s emissions as part of one of the flights.

Why are we going to all this effort? Mainly to figure out how much methane is coming out from the lakes, wetlands and wildfires. This will help us to piece together the global methane trends – a key factor in how much the planet will warm in the coming years. To do this, we sample the methane in the atmosphere while airborne, as well as ethane and other pollutants. Some of these measurements come in real time, others are taken back to the UK to analyse for carbon isotopes, which gives us a clue as to the emissions source. You will find blogs from our 2017 airborne field work, based in Senegal, where wildfires were sampled. I have to say, based on the turbulence we felt on the commercial flight here, I am not too keen on flying near wildfires (which cause turbulence from their heat) or storms (which are quite common even though this is the dry season for Uganda).

I think the boost from the coffee is wearing off now, so I will sign off from my first post. There will be more content over the coming week, when I hope to have more than a few hours doze before sitting down to write.

Ponds in the Pantanal

Our next post from the field comes from Luciana Gatti and Manuel Gloor, who have been measuring how much methane is found over the Pantanal region of Brazil. This is a huge area of wetlands, and is therefore also a huge source of methane. 

 

Luciana Gatti and Manuel Gloor with the pilots of the light aircraft

Luciana Gatti and Manuel Gloor with the pilots of the light aircraft

We, Luciana Gatti and Manuel Gloor, have just returned from the Pantanal area where we have started sampling of the vertical air column (0 to 4.5 km height above sea level) using light aircraft (see the first photo) for subsequent analysis for CH4 at Luciana’s laboratory.
The mosaic of circular ponds in the Pantanal

The mosaic of circular ponds in the Pantanal

The Pantanal is one of the largest wetlands worldwide with an areal extent on the order of 150,000 km². It is a flat area which drains very slowly via a complicated system of ponds feeding each other as well as some slowly moving rivers. The region is seasonally flooded and has seen major precipitation maxima in recent years but also sometimes drier phases. It is a potential candidate region for a climate change methane emissions feedback.
An area of flowing water in the Pantanal

An area of flowing water in the Pantanal

The mosaic of circular ponds can be very clearly seen from the aircraft (photo 2) as well as occasionally flowing water areas (photo 3). If one looks really, really carefully one may even spot a hungry caiman or two. The vertical air profile has already been analyzed for greenhouse gases and reveals a major methane source which reveals itself as a large concentration enhancement within the lowermost 2 km above ground.