Tag Archives: geography

Africa Is a Big Place

Africa has been in the US news more than it usually is (which isn’t saying much) because of the ongoing outbreak of Ebola Virus Disease (EVD) in West Africa. One of the things that is always shocking when a new place appears in the news is the degree of geographic cluelessness of Americans. When it comes to Africa, my experience indicates that people generally greatly underestimate its size and, distressingly, sometimes don’t realize that Africa is actually a continent made up of over 50 sovereign states. Africa is, in fact, huge. It’s easy to underestimate its size, in large part, because of the projections we use to render a three dimensional space in two dimensions of a map. Most common projections compress the area of more equatorial regions and the African continent straddles the equator.

There is all sorts of anxiety about travel from African countries as a result of the EVD epidemic in West Africa. The deal is that the epidemic is localized to the far western portion of the continent.  Southern and eastern Africa, the destinations most likely to be visited by American tourists for example, are a long way from this part of the continent. While working on a paper with my colleague Simon Jackman today, I made an offhand comment about Freetown (Sierra Leone) probably being closer to Sao Paulo (Brazil) than it is to Nairobi (Kenya). Simon being Simon, said, “we can test that,” and he called up the wonderful Great Circle Mapper page. We figured out the distance from the Freetown to Nairobi airports, which turns out to be 3522 miles, and then plotted out a a circle with that radius centered on Freetown. The results can be seen here, and here is a screenshot of the resulting map:


Circle of radius 3522 mi (the distance from Freetown to Nairobi) centered on Freetown, Sierra Leone.
Circle of radius 3522 mi (the distance from Freetown to Nairobi) centered on Freetown, Sierra Leone.

So, what do you know, Sao Paulo is, in fact, closer to Freetown than Nairobi is. Cape Town and Johannesburg are outside the circle, but you know what’s in it? Pretty much all of western Europe. Of course, this doesn’t mean that Sao Paulo is socially closer to Freetown, but it is remarkable nonetheless. I just ran into this cool video of world air traffic on a 24-hour loop. One striking feature of this video is that there really isn’t much traffic between the corner of West Africa currently afflicted by EVD and just about anywhere in the world (including Nairobi!). Now, Nigeria would be a different story altogether. There are plenty of connections from Lagos or Port Harcourt to the rest of the world…

Along these lines of Africa being a big place, Kai Krause made this great graphic a few years ago showing the size of the African continent relative to a variety of other countries and other land masses.

Stanford Migration and Adaptation Workshop

Information on our NICHD-funded April formal demography workshop on migration and adaptation is now posted on the website Stanford Center for Population Research (SCPR, pronounced “scooper”).  SCPR is itself hosted by Stanford’s Institute for Research in the Social Sciences (IRiSS), which is also the umbrella organization for the Methods of Analysis Program in the Social Sciences (MAPSS), a program that I currently direct. We will be having this little shindig at the new IRiSS facility on Alta Road, a lovely location on the hill behind Stanford’s main campus, quite near the Center for Advanced Study in the Behavioral Sciences. All of these workshops have been terrific, but I am particularly excited about this one because it brings together so many of the threads of work going on right here at Stanford on human ecology, demography, and the biophysical environment.  Much of this work is facilitated by the Woods Institute for the Environment, where I and a number of the other Stanford-based speakers sit.

As a quick teaser of the kind of work that we will discuss, I want to draw people’s attention to two papers by Stanford faculty participating in the workshop that are just out this week.  Eric Lambin has a paper (which also happens to be his inaugural paper in PNAS as a member of the NAS) on the interactions between globalization, land use, and future land scarcity. I saw a talk on this last week and it was terrific. Lambin and co-author Patrick Meyfroidt argue that there are four socio-economic mechanisms (displacement, rebound, cascade, and remittance effects) that are amplified by by the process of economic globalization and that can accelerate land conversion. David Lobell has a new paper out today in Nature Climate Change in which he and his co-authors capitalize on a treasure-trove of historical agricultural trials in Africa to measure the impact of warming on maize production.  They find that approximately 65% of areas will experience a decline in productivity with a one-degree rise in global temperature if rain patterns are optimal.  If rain is sub-optimal, as is likely to be the case, then every site would experience reduced productivity.  This supports David’s contention that the effects on agricultural productivity of temperature increase from global climate change can not be understood except in the context of changes in rainfall as well.

Potential students who are interested in studying these issues at Stanford have a number of options.  If anthropology is your thing, we have a Ph.D. focus area in Ecology and Environment within the Department of Anthropology.  Bill Durham, Lisa Curran, Rebecca Bird, Douglas Bird, and I all teach in this area. Another option, for the more interdisciplinarily inclined, is E-IPER.  This is a topic I will have to take up in more detail in a later post since I actually have to do some work organizing our workshop now!