The map below shows the changes in glacier extent in the Öræfajökull region, Iceland, between 1890 and 2010.
Source: Hannesdóttir, et al. (2015)
two years, apart from 2010, in which aerial images were used to record glacier positions.
one reason why glaciers in the Öræfajökull region may retreat at different rates despite being in the same general climate zone.
two ways in which historical data on glacier retreat, such as that shown for Öræfajökull, can help scientists assess the long-term impacts of climate change.
how variations in glacier retreat across a single ice cap system can inform understanding of physical geography and climate interactions.
the advantages and limitations of using historical glacier extent maps as evidence of environmental change.
The map below shows Permafrost Distribution in the Northern Hemisphere.
Source: the International Association for Permafrost Science on the Basis of Summarized Observation Data.
one region where continuous permafrost is dominant.
the classification of permafrost found across most of Scandinavia.
The graph below shows the typical distribution of on-the-ground actions across global biomes and anthromes.
Source: The Intergovernmental Panel on Climate Change.
the biome in which 'grazing and fire management' is commonly practiced.
The graph shows dryland categories across geographical areas (continents and the Pacific region).
Source: TerraClimate precipitation and potential evapotranspiration (1980–2015) (Abatzoglou et al. (2018))
Using the graph, the continent with the largest absolute area classified as hyper-arid.
The map below shows the geographical distribution of drylands, delimited based on the aridity index (AI).
Source: Abatzoglou et al. (2018)
one region shown on the map that is classified as hyper-arid.
the climate classification located just south of the hyper-arid zone in the Sahel region.
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