🌾 War in Ukraine & global food price instability 🌾
As I have mentioned a few times in the past, global food prices are at near-historic highs, already threatening global political stability. A war in Ukraine could make this situation *much* worse. (1/8)
Firstly, despite a small dip in Dec 2021, the UN @FAO 's Food Price Index is still at alarmingly high levels.
The primary causes are stated as the: "high cost of inputs, the ongoing global pandemic and ever more uncertain climatic conditions" (2/8)
High global food prices have been historically linked to waves of unrest (see graph), through the interplay of food riots and pre-existing social tensions.
In 2021 food-related unrest was experienced in S. Africa, Colombia, Nigeria, Sudan, Brazil & many other countries. (3/8)
The FAO does not expect the situation to improve in 2021, however, with a Russian invasion of Ukraine now likely, this situation could get significantly worse.
This is due to the outsized impact which Ukraine has on global grain markets. (4/8)
While many countries grow more food than Ukraine, it is one of the top exporters of grain, & thus has a bigger impact on global markets. Alongside Russia & Kazakhstan, research has shown that crop failures in Ukraine can trigger market shocks (5/8) link.springer.com/article/10.100…
Now let's look at a so-called 'Soil Bonitet' map of Ukraine, that gives an indication of the areas of greatest agricultural productivity. Here we can see that some of the most productive areas are to the west of the Dnieper River, & at high risk of becoming conflict zones. (6/8)
If conflict (or an insurgency) is ongoing in these areas by the beginning of the growing season in April, this will massively impact exports and drive global prices higher. Even if conflict has ended, the destruction of infrastructure will undoubtably reduce yields. (7/8)
Taking the above into consideration, the world should be prepared for significant second order effects from a coming war, and take action to stabilise global food prices. Should this not be done, even greater instability is likely throughout the developing world. (8/8)
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THREAD: It never ceases to amaze me how much you can get away with on the open ocean.
You might think that in a time of satellite megaconstellations all of the Earth's surface would be imaged regularly, & if something big happened, we'd see it.
Well, you'd be wrong...
The truth is that most well-known EO satellites don't image areas of the ocean away from land.
It is surprisingly difficult to get an exact answer for 'why' here. I've heard different combinations of power-saving, downlink limitations, & land-optimized instrumentation.
It's worth noting here, that I am talking about satellites with a high enough resolution to monitor human activity on the open ocean (eg. vessels), not lower resolution sats that monitor sea state or help with weather forecasting (eg. Sentinel-3).
THREAD: In September 2022, the Russian Government announced that it was establishing two new tank repair plants in order to support its war in Ukraine. government.ru/docs/all/14295…
One of those is the 72nd Armoured Repair Plant just south of Kamensk-Shkhinsky (48.273188, 40.262287).
I was interested in seeing in anything changed in the number of military vehicles in the parking areas for this repair plant, and if this mapped to changes in the conflict dynamics.
To do this, I calculated the mean VV and VH reflectance values for the Sentinel-1 SAR satellite over the two large parking lots seen in high-resolution visual-spectrum images, working under the assumption that more vehicles would increase the mean reflectance.
THREAD: On the unprecedented flooding in #Pakistan, a looming follow-on catastrophe, and a glimpse into the future of climate security. (1/14)
Pakistan is currently experiencing climate change-amplified floods unlike anything in its history, but a large part of this story is being overlooked by the media. (2/14)
Firstly, the headline that “⅓ of Pakistan is underwater” is an exaggeration. Satellite imagery (see below) reveals that while the flooding is indeed massive, it is not >10% of the country’s land area. (3/14)
So, we hear a lot about how the war in Ukraine is leading to record global food prices, but here is another reason...
This is a Sentinel-2 NDVI composite image I created showing average vegetation health in India over May 2022. [1/7]
And this is the same image, but this time showing the mean of the May 1 to May 25 period over the previous 5 years.
- In both images, green is healthy plants, and brown is unhealthy
-Holes in the data are caused by cloudy images being filtered out [2/7]
With the second image (May 2017-2021) showing more green than the first (May 2022), it's safe to assume something is wrong this year. But how bad is it?
THREAD: So today, I submitted my master's thesis, looking at the link between the rioting and food shortages in the context of intensifying droughts due to climate change. (1/14)
It's often reported in the media that climate change will cause more war and human conflict, but the actual link between them isn't well-established in studies.
However, this is what the latest IPCC report says: (2/14)
Large-scale conflict is an very complex phenomenon & saying that a change in a single variable (eg. higher temp) will lead to a proportionate rise in the # of wars/battle deaths is questionable.
But the impact on levels smaller-scale conflict may be easier to demonstrate. (3/14)
THREAD: Fresh brown water is flooding into the Grand Ethiopian Renaissance Dam (GERD), following an announcement by Ethiopia that it will begin the dam's 2nd filling phase.
Egypt has "rejected" the decision, & the risk of conflict between Ethiopia, Sudan & Egypt is rising. (1/6)
Egypt fears the filling of the huge dam will reduce the amount of water it receives from the Nile River. Given the country's dependence on this river for food production, this is an existential risk for the country. Sudan also has similar (albeit lesser) concerns. (2/6)
In the past, Egypt has threatened military action against Ethiopia should the dam be filled according to a unilateral schedule. (3/6) aljazeera.com/news/2021/3/30…