Global semi-arid climate change over last 60 years

Huang, Jianping; Ji, Mingxia; Xie, Yongkun; Wang, Shanshan; He, Yongli; Ran, Jinjiang

doi:10.1007/s00382-015-2636-8

Cited by 559 publications

(364 citation statements)

References 111 publications

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“…The recent cooling over NH land (Cohen et al 2012) was reversed from the previous enhanced warming, which was probably related to the circulation change over extratropical NH (Huang et al 2012;Wallace et al 2012;He et al 2014;Huang et al 2016a;Guan et al 2015;Huang et al 2016b). As suggested by Wallace et al (1995) and He et al (2014), the land-sea thermal contrast can excite feedbacks related with circulation and induces the transition between the pattern of "cold ocean and warm land" (COWL) and "warm ocean and cold land" (WOCL).…”

Section: Introductionmentioning

confidence: 95%

The dynamics of the warming hiatus over the Northern Hemisphere

et al. 2016

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, and the ZTF represents the asymmetry in temperatures between the extratropical large-scale warm and cold zones in the zonal direction. Via the different performance of combined MTF and ZTF, we found that the DMO's modulation effect on SAT was strongest when both weaker (stronger) MTF and stronger (weaker) ZTF occurred simultaneously. And the current hiatus is a result of a downward DMO combined with a weaker MTF and stronger ZTF, which stimulate both a weaker polar vortex and westerly winds, along with the amplified planetary waves, thereby facilitating southward invasion of cold Arctic-air and promoting the blocking formation. The results conclude that the DMO can not only be used to interpret the current warming hiatus, it also suggests that global warming will accelerate again when it swings upward.

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Section: Introductionmentioning

confidence: 95%

The dynamics of the warming hiatus over the Northern Hemisphere

et al. 2016

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“…Semi-arid region is the transition zone between arid and semi-wet regions; it is defined as the area where precipitation is less than potential evaporation and is characterized by high temperatures (30-45 • C) during the hottest months. According to Huang et al (2016a), the annual mean precipitation in semi-arid regions ranges from 250 to 500 mm yr −1 and the AI of semi-arid region is between 0.2 and 0.5. The global semi-arid regions in Fig.…”

Section: Methods For Detecting Anthropogenic Dust Aerosolmentioning

confidence: 99%

The relationship between anthropogenic dust and population over global semi-arid regions

et al. 2016

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Abstract. Although anthropogenic dust has received more attention from the climate research community, its dominant role in the production process is still not identified. In this study, we analysed the relationship between anthropogenic dust and population density/change over global semi-arid regions and found that semi-arid regions are major source regions in producing anthropogenic dust. The results showed that the relationship between anthropogenic dust and population is more obvious in cropland than in other land cover types (crop mosaics, grassland, and urbanized regions) and that the production of anthropogenic dust increases as the population density grows to more than 90 persons km −2 . Four selected semi-arid regions, namely East China, India, North America, and North Africa, were used to explore the relationship between anthropogenic dust production and regional population. The most significant relationship between anthropogenic dust and population occurred in an Indian semi-arid region that had a greater portion of cropland, and the high peak of anthropogenic dust probability appeared with 220 persons km −2 of population density and 60 persons km −2 of population change. These results suggest that the influence of population on production of anthropogenic dust in semi-arid regions is obvious in cropland regions. However, the impact does not always have a positive contribution to the production of anthropogenic dust, and overly excessive population will suppress the increase of anthropogenic dust. Moreover, radiative and climate effects of increasing anthropogenic dust need more investigation.

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“…Rural communities in areas of transition between desert and forests are significantly affected by rapid climatic changes currently underway (Kepner et al 2006;Huang et al 2016). In particular, for the semi-desert region of Chile, significant changes in rainfall patterns, along with other socioenvironmental processes, have caused degradation (Leon 2007) and impacted the productivity of the land.…”

Section: Discussionmentioning

confidence: 99%

Modeling the decline of labor-sharing in the semi-desert region of Chile

Baeza

Janssen

2017

Reg Environ Change

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The rapid environmental changes currently underway in many dry regions of the world, and the deep uncertainty about their consequences, underscore a critical challenge for sustainability: how to maintain cooperation that ensures the provision of natural resources when the benefits of cooperating are variable, sometimes uncertain, and often limited. In this work, we present the case of a group of rural communities in a semi-desert region of Chile, where cooperation in the form of labor-sharing has helped maintain higher agriculture yields, group cohesion, and identity. Today, these communities face the challenge of adapting to recurrent droughts, extreme rainfall, and desertification. We formulated an agent-based model to investigate the consequences of regional climate changes on the fate of these labor-exchange institutions. The model, implemented in the framework of prospect theory, simulates the economic decisions of households to engage, or not, in labor-sharing agreements under different scenarios of water supply, water variability, and socio-environmental risk. Results show that the number of fulfilled labor-sharing agreements is reduced by water scarcity and environmental variability. More importantly, defections that involve non-fulfillment of these agreements are more likely to emerge at the intermediate level of environmental variability and water supply stress. These results underscore the need for environmental policy instruments that consider the effects of regional climate changes on the social dynamics of these communities.

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Global semi-arid climate change over last 60 years

Cited by 559 publications

References 111 publications

The dynamics of the warming hiatus over the Northern Hemisphere

The dynamics of the warming hiatus over the Northern Hemisphere

The relationship between anthropogenic dust and population over global semi-arid regions

Modeling the decline of labor-sharing in the semi-desert region of Chile

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