Archive for the ‘Climate’ Category
Extreme conditions in Russian croplands
Heatwave and drought have caused severe damage to Russia’s grain crop. Yields are expected to fall by up to 40%[1]. Russia announced a ban on wheat exports from August 15, causing a sharp rise in global grain prices. How severe are conditions in 2010 compared to previous Russian droughts and heat waves? [...]
August 17, 2010
Posted in: Agriculture, Climate 
2 Comments
Large-scale vegetation-rainfall correlations in Africa
Weather and climatic variability affect vegetation on continental scales. Intuitively, healthy vegetation is greener. A quantitative index of “greenness” called Normalised Difference Vegetation Index (NDVI) was developed by NASA. The index takes values between 0 and 1. NDVI is related to the fraction of photosynthetically active radiation absorbed by the vegetation canopy. It is a [...]
May 12, 2010
Tags: Africa, Drought, NDVI Posted in: Climate, ecosystem model 4 Comments
