منابع مشابه
Dryland ecohydrology and climate change: critical issues and technical advances
Drylands cover about 40 % of the terrestrial land surface and account for approximately 40 % of global net primary productivity. Water is fundamental to the biophysical processes that sustain ecosystem function and food production, particularly in drylands where a tight coupling exists between ecosystem productivity, surface energy balance, biogeochemical cycles, and water resource availability...
متن کاملDiscrimination between climate and human-induced dryland degradation
In this study we present a technique to discriminate between climate or human-induced dryland degradation, based on evaluations of AVHRR NDVI data and rainfall data. Since dryland areas typically have high inter-annual rainfall variations and rainfall has a dominant role in determining vegetation growth, minor biomass trends imposed by human influences are difficult to verify. By performing man...
متن کاملUncertainty in climate science and climate policy
This essay, written by a statistician and a climate scientist, describes our view of the gap that exists between current practice in mainstream climate science, and the practical needs of policymakers charged with exploring possible interventions in the context of climate change. By ‘mainstream’ we mean the type of climate science that dominates in universities and research centres, which we wi...
متن کاملGlobal desertification: building a science for dryland development.
In this millennium, global drylands face a myriad of problems that present tough research, management, and policy challenges. Recent advances in dryland development, however, together with the integrative approaches of global change and sustainability science, suggest that concerns about land degradation, poverty, safeguarding biodiversity, and protecting the culture of 2.5 billion people can b...
متن کاملAlbedo feedbacks to future climate via climate change impacts on dryland biocrusts
Drylands represent the planet's largest terrestrial biome and evidence suggests these landscapes have large potential for creating feedbacks to future climate. Recent studies also indicate that dryland ecosystems are responding markedly to climate change. Biological soil crusts (biocrusts) ‒ soil surface communities of lichens, mosses, and/or cyanobacteria ‒ comprise up to 70% of dryland cover ...
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ژورنال
عنوان ژورنال: Journal of Geography (Chigaku Zasshi)
سال: 2007
ISSN: 0022-135X,1884-0884
DOI: 10.5026/jgeography.116.6_811