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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Cambios climáticos</topic></authority><related type="narrower"><topic>Desertización</topic></related><related type="other"><topic>Paleoclimatología</topic></related><related type="other"><topic>Climatología</topic></related><related type="other"><topic>Medio ambiente-Influencia humana</topic></related><related type="other"><topic>Dendroclimatología</topic></related><related type="other"><topic>Calentamiento global</topic></related><related type="other"><topic>Clima</topic></related><related type="other"><topic>El Niño (Corriente oceánica)</topic></related><related type="other"><topic>Bioclimatología</topic></related><variant type="other"><topic>Clima-Cambios</topic></variant><variant type="other"><topic>Fluctuaciones climáticas</topic></variant><variant type="other"><topic>Oscilaciones climáticas</topic></variant></mads>